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Battery Business Brings Tanzanians Cheap Electricity

By David SouthDevelopment Challenges, South-South Solutions

SOUTH-SOUTH CASE STUDY

Access to electricity is critical for making substantial development gains. With steady supplies of electricity, it is possible to read and study at night, to run modern appliances, to better use the latest information technologies and to work using time- and labour-saving devices. A home with electricity literally switches the light on modern life and gives a family huge advantages compared to those without electricity.

But there are two potential obstacles to providing electricity for the poor: one is just getting access to a steady supply; the other is paying for it.

In Africa, much of the population suffers from an electricity famine. The situation is worse than on any other continent: the proportion of people in Africa still without electricity is higher – and the rate of urban electrification is lower – than anywhere else. Four out of five rural residents in Africa live without electricity. The rate of rural electrification is also lower than on any other continent and the proportion of Africans who depend on inefficient traditional energy sources is higher than elsewhere (Desertec-Africa).

EGG-energy (http://egg-energy.com) is a Tanzanian company using an innovative business model to bring affordable electricity to rural communities.

Its co-founder, Jamie Yang, said Tanzania has a huge potential market for offgrid energy services. About 85 per cent of the population lacks access to electricity, a figure that rises to 98 per cent of the rural population.

EGG-energy says it is “dedicated to helping low-income consumers in sub-Saharan Africa gain access to clean, affordable energy, using a unique strategy based around portable rechargeable batteries.” The company has eight full-time staff based in their Makumbusho office, 6 kilometres north of Dar es Salaam, the capital.

It calls its system the “portable grid,” and it works like this: customers have a power system installed in their home that runs on brick-sized, re-chargeable batteries. The batteries are re-charged at a central charging station using power from the Tanzanian power grid, and sent to local distribution centres where customers can pick them up. Customers rent the batteries for a subscription fee, and they last about five nights in a home. When the battery is empty, the customer returns it, swaps for a fresh battery and pays a small swapping fee.

It is a brilliant solution to the problem of getting power from the main Tanzanian power grid to people’s homes. According to EGG-energy, most Tanzanians live within 5 kilometres from a power grid line. Yet the majority of the population lack access to electricity.

“After researching the energy situation in Tanzania and other countries with similar electricity access problems, it became clear that one of the primary problems was a lack of last-mile distribution,” explained Yang. “The only way to get power from the source into homes and businesses were power lines, and for the vast majority of rural Tanzanians, this was very much out of reach.

We saw situations in which power lines would pass right over large populations that were still using kerosene for lighting. We also saw that distributed generation like solar was finding only very limited markets because there was no share or sell power from that source without an affordable way to distribute the electricity.”

While EGG-energy is based in Tanzania, it hopes hope to expand across the developing world.

In order to develop an effective distribution network, EGG-energy partners with local store owners and delivery businesses to help with distributing the batteries. The batteries are based on those used in the airline industry and are light enough to be held in one hand.

Yang believes marketing is critical to the success of the technology.

“Don’t underestimate the cost of sales, marketing, and distribution,” he said.

“Many companies focus on the technology and in lowering the cost of the technology, while not paying enough attention to the gaps in the distribution channels.

“We have a sales team that communicates what we do through a variety of methods, including door-to-door sales, road shows and village meetings. We also make contact with the local political leaders and offer referral awards to our existing customers. Potential customers come to our charging stations to purchase the system and to connect to EGG.”

When a customer signs up with EGG-energy, a technician is dispatched to their home to make sure the electricity system is sound and effective. The company also sells energy-efficient lights, radios and mobile phone chargers to complement the electricity system. It’s a wise business model, since having a steady and reliable supply of electricity is a great motivator for customers to purchase other electric-powered appliances.

“We have technicians that have received vocational training through the Tanzanian system and technicians that we train ourselves,” Yang said. “We have very standardized electricity installations that are easy to teach, and have more experienced technicians that we rely on for troubleshooting and support.”

EGG-energy also makes the claim it can reduce a household’s energy expenses by 50 per cent as they make the switch from traditional batteries for radios and kerosene lamps for light.

EGG-energy calls itself a “for-profit company with a social mission.” It sees the provision of affordable electricity and energy as a spur for small entrepreneurs to build their businesses, boost educational opportunities through longer study time, and help with connecting families with the outside world.

It uses regular feedback with customers to make sure their service is actually cheaper than other options – a good habit for any business looking to build a lasting customer relationship.

“One of the key deficiencies in the energy supply chain is customer support,” said Yang. “We have seen multiple solar installations given by NGOs to community organizations that are no longer functioning because the user doesn’t have someone reliable to call or hasn’t allotted a budget to maintain the system.

“Customer support is a key component of last mile distribution, and something that EGG-energy is focusing on as an energy services company with a local, physical presence.”

Published: April 2012

Resources

1) ANSOLE (the African Network for Solar Energy) is a research-oriented network of 200 scientists from 22 African and 10 non-African countries. It believes, according to Mammo Muchie, founding editor of the African Journal of Science, Technology, Innovation, and Development, “solar power will become the major renewable energy source on the continent only by organized research, training, design, and engineering.” Website: ansole.org

2) The Kenya-based non-governmental organization (NGO) Access: energy is tackling the problem of 84 per cent of Kenyans – 32 million people – lacking access to electricity at home. It is doing this by teaching people how to make and assemble wind turbines out of scrap metal and car parts and other materials found within communities. Their turbine design is called the Night Heron Turbine. Website: http://access-collective.com/energy/

4) TANESCO: Tanzania Electric Supply Company: Website: http://www.tanesco.co.tz

https://davidsouthconsulting.org/2022/10/24/brazilian-solar-powered-wifi-for-poor-schools/

https://davidsouthconsulting.org/2022/10/06/indian-solar-power-pack-powers-villages/

https://davidsouthconsulting.org/2022/11/20/new-battery-back-up-technology-targeting-developing-countries-and-remote-regions/

https://davidsouthconsulting.org/2022/10/02/powerful-solar-light-spurring-income-making-opportunities/

https://davidsouthconsulting.org/2022/10/24/solar-power-bringing-light-and-opportunity-to-the-poor/

https://davidsouthconsulting.org/2021/03/24/solar-powered-mobile-clinics-to-boost-rural-healthcare-in-africa/

https://davidsouthconsulting.org/2021/03/30/solar-powered-village-kick-starts-development-goals/

https://davidsouthconsulting.org/2022/10/06/solar-sisters-doing-it-for-themselves-tackling-african-light-famine/

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP’s South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South’s innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.  

https://davidsouthconsulting.org/2021/03/05/southern-innovator-issue-4/

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ORCID iD: https://orcid.org/0000-0001-5311-1052.

© David South Consulting 2023

Categories
Archive Development Challenges, South-South Solutions Newsletters Southern Innovator magazine

Solar Solution to Lack of Electricity in Africa

By David SouthDevelopment Challenges, South-South Solutions

SOUTH-SOUTH CASE STUDY

Electricity is critical to improving human development and living standards. Yet, for many in the global South, electricity is either non-existent or its provision is patchy, erratic, unreliable or expensive.

Just as Africa has been able to jump a generation ahead when it comes to communications through the mass adoption of mobile phones – a much cheaper option than trying to provide telephone wires and cables across the continent – so it could also bypass the burdensome costs of providing electricity mains to everyone by turning to smaller electricity generation technologies such as solar power. This is called “off-grid” electricity.

The UN has set the goal of universal access to modern energy services by 2030. A report issued in April 2010 by United Nations Secretary-General Ban Ki-moon’s Advisory Group on Energy and Climate Change (AGECC) calls for expanding energy access to more than 2 billion people (http://www.unido.org/fileadmin/user_media/Publications/download/AGECCsummaryreport.pdf).

The report found that a lack of access to modern energy services represents a significant barrier to development. Some 1.6 billion people still lack access to electricity.

A reliable, affordable energy supply, the report says, is the key to economic growth and the achievement of the anti-poverty targets contained in the Millennium Development Goals.

When a person has electricity and the lighting it powers, it is possible to do business and study late into the night. Electric lighting also makes streets and living areas safer. Electricity can power a plethora of labour-saving and life-enhancing consumer goods: televisions, refrigerators, vacuum cleaners, air conditioners and fans, washing machines, clothes dryers, computers. And electricity recharges that most essential item, the mobile phone, on which millions rely to do their daily business.

After witnessing the struggle African health clinics have to access electricity, a Nairobi, Kenya-based company has developed a simple solution to ensure a steady supply of solar electricity. One Degree Solar’s (http://onedegreesolar.com/) founder, Gaurav Manchanda, developed and sells the BrightBox solar-charging system for lights, mobile phones, tablet computers and radios.

He first gained experience working in the West African nation of Liberia with the Clinton Health Access Initiative (http://www.clintonfoundation.org/main/our-work/by-initiative/clinton-health-access-initiative/about.html). Working at the country’s Ministry of Health, he found most health clinics operated without electricity.

He identified solar power as the only viable energy source. Trying to deliver fuel to power generators by the road network had two impediments: the diesel fuel was expensive and the road conditions were poor.

After seeing that large solar-power systems required significant maintenance and upkeep, he started to explore the possibility of low-cost, and simple-to-use solar electricity products that would be useful to community healthcare workers.

This became the beginning of One Degree Solar and its mission.

The company’s main product is the BrightBox, a cleverly designed solar charger. A bright orange box with a folding, aluminum handle at the top for easy carrying, it switches on and off simply with a bright red button. It has a waterproof solar panel. The BrightBox has USB (universal service bus) (http://en.wikipedia.org/wiki/Universal_Serial_Bus) ports so that mobile phones and radios can be plugged in. It is also possible to plug in four lights at once with the four outports on the side of the box.

It meets the standards set by the Lighting Africa initiative (http://lightingafrica.org/specs/one-degree-brightbox-2-.html) of the International Finance Corporation and the World Bank.

One Degree Solar claim it is possible to set up a BrightBox in 10 minutes. When the indicator light has turned green, the box is fully charged and capable of providing 40 hours of light.

A full charge can power two light bulbs for 20 hours. Manchanda told How We Made It In Africa (http://www.howwemadeitinafrica.com/) that he has sold 4,000 units of the BrightBox since its launch in October 2012.

According to The Nation, the BrightBox is currently retailing in Kenya for Kenyan shillings 7,000 (US $82).

One Degree Solar’s product range is sold to local resellers and distributors. The products are designed to be repaired using locally sourced parts and can be fixed by local electricians.

Most of the sales so far have been in Kenya but the firm has also sold units to other countries.

Testimonials on the BrightBox website tell of the transformation to people’s lives the clean energy source makes: “BrightBox has helped us in so many ways! We used to spend 800 Shillings (US $9.50) a month for two paraffin lanterns. The fumes smelled and always made us feel sick.”

Manchanda is a strong believer in Africa’s potential and its future and dismisses those who are negative about the continent.

“That was not a holistic assessment, but rather, an unnecessary and damaging generalization,” he told How We Made It In Africa. “Fortunately, most news outlets in Africa are now available online and offer a wider range of perspectives. The middle class is booming in certain countries. We have seen the success of mobile phones in enabling people to access other services. I think hope and progress come with innovation. Technology access has helped create entirely new markets and reach populations that otherwise could have taken decades to service with traditional approaches.

“India was in a similar space 15 years ago before the Internet boom, and today parts of Nairobi (Kenya) are just like Delhi (India): people have a cell phone or two, there are large shopping malls, a booming middle class, and new construction everywhere.”

Published: June 2013

Resources

Global Off-Grid Lighting Association: Global Off-Grid Lighting Association (GOGLA) has been established to act as the industry advocate with a focus on small and medium enterprises. It is a neutral, independent, not-for-profit association created to promote lighting solutions that benefit society and businesses in developing and emerging markets. GOGLA will support industry in the market penetration of clean, quality alternative lighting systems. Website: http://globaloff-gridlightingassociation.org/

Solar Sister: Solar Sister eradicates energy poverty by empowering women with economic opportunity. Website: http://www.solarsister.org/

Solarpod: Sunbird Solar/Thousand Suns manufactures, sources and distributes the portable solar generator range. Website: http://www.thousandsuns.com/

4) Little Sun: An attractive, high-quality solar-powered lamp in the shape of a hand-sized sun developed by artist Olafur Eliasson and engineer Frederik Ottesen. Website: http://www.littlesun.com/

Southern Innovator logo

London Edit

31 July 2013

Development Challenges, South-South Solutions was launched as an e-newsletter in 2006 by UNDP’s South-South Cooperation Unit (now the United Nations Office for South-South Cooperation) based in New York, USA. It led on profiling the rise of the global South as an economic powerhouse and was one of the first regular publications to champion the global South’s innovators, entrepreneurs, and pioneers. It tracked the key trends that are now so profoundly reshaping how development is seen and done. This includes the rapid take-up of mobile phones and information technology in the global South (as profiled in the first issue of magazine Southern Innovator), the move to becoming a majority urban world, a growing global innovator culture, and the plethora of solutions being developed in the global South to tackle its problems and improve living conditions and boost human development. The success of the e-newsletter led to the launch of the magazine Southern Innovator.

Creative Commons License

This work is licensed under a
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ORCID iD: https://orcid.org/0000-0001-5311-1052.

© David South Consulting 2023

Categories
Archive Development Challenges, South-South Solutions Newsletters Southern Innovator magazine

Global South Eco-cities Show How the Future Can Be

By David SouthDevelopment Challenges, South-South Solutions

SOUTH-SOUTH CASE STUDY

The world is currently undergoing a high-stress transition on a scale not seen since the great industrial revolution that swept Europe in the 19th and 20th centuries. Today’s urban and industrial transition involves many more people and is taking place on a greater proportion of the planet. With rapid urbanization comes a demand for middle class lifestyles, with their high-energy usage and high consumption of raw materials.

This is stretching the planet’s resources to breaking point. And as many have pointed out, if the world’s population is to continue past today’s 7 billion to reach 9 billion and beyond, new ways of living are urgently required. Radical thinking will be necessary to match the contradictory goals of raising global living standards for the world’s poor with pressured resources and environmental conditions.

But there are innovative projects already under development to build a new generation of 21st-century cities that use less energy while offering their inhabitants a modern, high quality of life. Two examples are in China and the Middle East.

Both projects are seen as a way to earn income and establish viable business models to build the eco-cities of the future. Each project is seeking to develop the expertise and intellectual capacity to build functioning eco-cities elsewhere. In the case of the Masdar City project in the United Arab Emirates, international businesses are being encouraged to set up in Masdar City and to develop technologies that can be sold to other countries and cities – in short, to create a green technology hub akin to California’s hi-technology hub ‘Silicon Valley’. Masdar City is also being built in stages as investors are found to help with funding. Both projects hope to prove there is money to be made in being green and sustainable.

The Tianjin Eco-city (tianjinecocity.gov.sg) project is a joint venture between China and Singapore to build a 30 square kilometre city to house 350,000 residents.

Tianjin (http://en.wikipedia.org/wiki/Tianjin) is a large industrial city southeast of China’s capital, Beijing. It is a place that wears the effects of its industrial expansion on the outside. Air pollution is significant and the city has a grimy layer of soot on most outdoor infrastructure.

China has received a fair bit of criticism for its polluted cities as the country has rapidly modernized in the past two decades. This sprint to be one of the world’s top economic powers has come at a cost to the environment. In this respect, China is not unusual or alone. Industrialization can be brutal and polluting, as Europe found out during its earlier industrial revolution.

But China is recognizing this can’t go on forever and is already piloting many initiatives to forge a more sustainable future and bring development and high living standards back in line with what the environment can handle.

Sino-Singapore Tianjin Eco-city is the second large-scale collaboration between the Chinese government and Singapore. The first was the Suzhou Industrial Park (http://www.sipac.gov.cn/english/).The Tianjin project came up in 2007 as both countries contemplated the challenges of rapid urbanization and sustainable development.

The project’s vision, according to its website, is to be “a thriving city which is socially harmonious, environmentally-friendly and resource-efficient – a model for sustainable development.”

The philosophy behind the project is to find a way of living that is in harmony, with the environment, society and the economy. It is also about creating something that could be replicated elsewhere and be scaled up to a larger size.

The city is being built 40 kilometres from Tianjin centre and 150 kilometres from Beijing. It is located in the Tianjin Binhai New Area, considered one of the fastest growing places in China.

Construction is well underway and can be followed on the project’s website (http://www.tianjinecocity.gov.sg/gal.htm). It will be completed in 2020.

This year, the commercial street was completed and is ready for residents to move in.

Residents will be encouraged to avoid motorized transport and to either use public transport or people-powered transport such as bicycles and walking.

An eco-valley runs down the centre of the city and is meant to be a place for pedestrians and cyclists to enjoy.

The basic building block of the Eco-city – its version of a city block – is called the Eco Cell. Each Eco Cell measures 400 metres by 400 metres, a comfortable walking distance. Four Eco Cells make a neighbourhood. Several Eco Neighbourhoods make an Eco District and there are four Eco Districts in the Eco-city. It is a structure with two ideas in mind: to keep development always on a walkable, human scale and also to provide a formula for scaling up the size of the Eco-city as the number of residents increases.

It is a logical approach and seeks to address one of the most common problems with conventional cities: sprawling and unmanageable growth that quickly loses sight of human need.

Agreement was also reached on the standards that should be achieved for a wide variety of criteria, from air and water quality to vegetation, green building standards, and how much public space there should be per person.

An ambitious project in the United Arab Emirates is trying to become both the world’s top centre for eco cities and a living research centre for renewable energy. Masdar City (http://www.masdarcity.ae/en/)is planned to be a city for 40,000 people. It is billed as a high-density, pedestrian-friendly development where current and future renewable energy and clean technologies will be “marketed, researched, developed, tested and implemented.”

The city hopes to become home to hundreds of businesses, a research university and technology clusters.

This version of an eco-city is being built in three layers in the desert, 17 kilometres from the Emirati capital Abu Dhabi. The goal is to make a city with zero carbon emissions, powered entirely by renewable energy. It is an ambitious goal but there are examples in the world of cities that use significant renewable energy for their power, such as Reykjavik, Iceland in Northern Europe, which draws much of its energy from renewables and geothermal sources.

Masdar City is designed by world-famous British architect Norman Foster (fosterandpartners.com) and will be 6.5 square kilometres in size.

The design is highly innovative. The city will be erected on 6 metre high stilts to increase air circulation and reduce the heat coming from the desert floor. The city will be built on three levels or decks, to make a complete separation between transport and residential and public spaces.

The lowest deck will have a transportation system based on Personal Rapid Transport Pods. These look like insect eyes and are automated, controlled by touch screens, using magnetic sensors for propulsion. On top of this transport network will be the pedestrian streets, with businesses, shops and homes. No vehicles will be allowed there, and people will only be able to use bicycles or Segway (segway.com) people movers to get around. An overhead light railway system will run through the city centre, all the way to Abu Dhabi City.

“By layering the city, we can make the transport system super-efficient and the street level a much better experience,” Gerard Evenden, senior partner at Foster + Partners, told The Sunday Times. “There will be no car pollution, it will be safer and have more open spaces. Nobody has attempted anything like this.”

Masdar City is being built in stages as funding comes, with the goal of completion by 2016. It hopes to achieve its aspiration to be the most technologically advanced and environmentally friendly city in the world. As for water supplies in the desert, there is a plan: dew collected in the night and morning and a solar-powered desalination plant turning salt water into drinking water.

Electricity will come from a variety of sources. Solar panels will be on every roof and double as shade on alleyways. Non-organic waste will be recycled, while organic waste will be turned into fuel for power plants. Dirty water will be cleaned and then used to irrigate green spaces. Because of the design, the planners hope the city will just use a quarter of the energy of a conventional city.

To keep the city smart and the project on top of developments in renewable energy, the Masdar Institute of Science and Technology (http://www.masdar.ac.ae/) will specialize in renewable energy technology.

The cost for the city was pegged at US $22 billion in 2009.

The chief executive of Masdar – Abu Dhabi’s renewable-energy company – is Sultan Al Jaber. He sees the city as a beacon to show the way for the rest of the Emirate to convert from a highly inefficient consumer of energy to a pioneer in green technology.

“The problem with the renewable-energy industry is that it is too fragmented,” he told The Sunday Times. “This is where the idea for Masdar City came from. We said, ‘Let’s bring it all together within the same boundaries, like the Silicon Valley model (in California, USA).’”

The project needs to gather much of its funding as it progresses. The United Nations’ Clean Development Mechanism (http://cdm.unfccc.int/) is helping with financing. Companies can earn carbon credits if they help fund a low-carbon scheme in the global South. The sultan is ambitious and sees this as a “blueprint for the cities of the future.” It has been able to bring on board General Electric (GE) and the Massachusetts Institute of Technology (MIT) to sponsor the university.

It is possible to visit Masdar City and take a tour (http://www.masdarcity.ae/en/105/visit-masdar-city/) and it is also possible to view online what has been built so far (http://www.masdarcity.ae/en/32/built-environment/).

Published: June 2012

Resources

1) Center for Innovation, Testing and Evaluation (CITE): Located in Texas, USA, CITE is a fully functioning city with no residents to test new technologies before they are rolled out in real cities. Website: http://www.pegasusglobalholdings.com/test-center.html

2) Digital Cities of the Future: In Digital Cities, people will arrive just in time for their public transportation as exact information is provided to their device. The Citizen-Centric Cities (CCC) is a new paradigm, allowing governments and municipalities to introduce new policies. Website: http://eit.ictlabs.eu/action-lines/digital-cities-of-the-future/

3) Eco-city Administrative Committee: Website: http://www.eco-city.gov.cn/

4) Sino-Singapore Tianjin Eco-city, Investment and Development Co., Ltd. Website: tianjineco-city.com

5) ‘The Future Build’ initiative, a new green building materials portal from Masdar City. Website: thefuturebuild.com

6) UNHABITAT: The United Nations Human Settlements Programme is the UN agency mandated to promote socially and environmentally sustainable towns and cities with the goal of providing adequate shelter for all. Website: http://www.unhabitat.org

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Categories
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Biogas Digester-in-a-Bag Brings Portability

By David SouthDevelopment Challenges, South-South Solutions

SOUTH-SOUTH CASE STUDY

Securing energy sources that are cheap (or free) and renewable can significantly reduce the cost of living for the world’s poor. The cost of fuel for essentials such as cooking and lighting can quickly eat up household incomes.

Gaining access to an inexpensive gas source that is also renewable can help people divert their income into other things, such as education and health care, improving individuals’ well-being and helping boost wealth.

Biogas (http://en.wikipedia.org/wiki/Biogas) is fuel made from biodegradable organic material such as kitchen, animal or human waste. It can be converted into gas either by being heated or using anaerobic bacteria to break down the material and turn it into combustible methane gas (http://en.wikipedia.org/wiki/Methane).

Most biogas systems are complex and large, involving an enormous domed biodigester.

But a clever solution from Kenya, the Flexi Biogas system (biogas.co.ke), is different. It is designed to be highly portable and scalable depending on a person’s needs. The Flexi Biogas system is a pillow-shaped PVC tarpaulin, measuring 6 metres by 3 metres. It comes in two parts: a plastic digester bag on the inside and a greenhouse-like plastic tunnel on the outside. The tunnel traps heat and keeps temperatures between 25 and 36 degrees Celsius.

Subjected to the heat of the sun, the environment inside the bag encourages microbes to digest the organic material – or substrate (http://en.wikipedia.org/wiki/Enzyme_substrate_%28biology%29) as it is known, releasing biogas bubbles and inflating the bag with methane. This gas is then sent through a PVC tube that can be connected to a gas-burning appliance such as a cooking stove.

Currently, most people use the biogas for lighting and cooking but it also produces enough gas to run agricultural machinery.

The Flexi Biogas digester sits on the ground and so is easy to observe and understand.

The Flexi Biogas system is designed, built and sold by Kenya’s Biogas International, which has sold 200 of the systems since 2011. In 2012, the company partnered with IFAD – the United Nations’ International Fund for Agricultural Development (ifad.org) – to install nine systems on dairy farms in Kenya. These Flexi Biogas systems use kitchen and human waste to produce electricity for lighting and to provide Internet service.

Cows produce 15 to 30 kilograms of dung a day (IFAD). By placing 20 kilograms of fresh cow dung into a Flexi Biogas digester it is possible to produce 1,000 litres of cooking gas – enough gas for a family of five to seven people. This amount of cow dung could also produce enough gas to run a 5 horsepower engine for one hour. The engine could also be connected to a car alternator to generate electricity to run lights, a computer or a television set.

A Flexi Biogas system costs US $410, including installation by technicians and all the extras including inlet and outlet pipes and a 15 metre gas pipe.

The cost of the system increased from the first prototypes. Initially, inexpensive plastic was used for the bags and the total cost for the system was US $180. But the makers encountered a problem with durability – the systems were prone to tearing and needed to be replaced after two years. Since then, they have moved to a more expensive PVC tarpaulin bag designed to last 10 years.

The makers point out that access to high-quality plastic and rubber in Kenya is difficult and the system’s costs could be brought down if they were manufactured in China or India.

The makers argue there are several reasons why the Flexi Biogas solution is suited to Africa. One is the difficulty of securing land tenure, necessary for the building of a permanent structure like a biodigester dome. It can also be a challenge to find skilled labour and get access to complex parts such as gas pressure regulators.

In a comparison between the conventional dome biogas digester and the Flexi Biogas system, IFAD found the average cost in Kenya for a dome system was US $1,000, compared to US $410 for the Flexi Biogas system. A fixed dome takes 21 days on average to set up while a Flexi Biogas system can be set up in a day. The Flexi Biogas system also turns the substrate into biogas faster and can operate at higher temperatures. IFAD found various advantages and disadvantages to the Flexi Biogas solution: it is relatively inexpensive, lightweight (10 kilograms), very portable, quick and simple to set up, and easy to operate. The disadvantages include being costly to make, easy to steal, and a relatively short lifespan.

Weighing it all up, IFAD still concluded that “the Flexi Biogas system is an affordable solution that provides household energy while making use of waste products that would otherwise add to emissions.”

Published: December 2012

LINKS:

1) The official portal on anaerobic digestion. Website: http://www.biogas-info.co.uk/

2) REA Biogas: REA Biogas has been championing the cause of anaerobic digestion (AD) and has been the unifying force which has helped to bring the industry forward. Website: http://www.biogas.org.uk/

3) Practical Action: Various renewable energy solutions including biogas. Website: http://practicalaction.org/biogas_expertise

4) Future Biogas: Future Biogas specialise in the construction and operation of biogas plants for the UK. Website: http://www.futurebiogas.com/

https://davidsouthconsulting.org/2022/11/21/africa/

https://davidsouthconsulting.org/2022/08/02/african-fuel-pioneer-uses-crisis-to-innovate/

https://davidsouthconsulting.org/2022/11/19/agricultural-waste-generating-electricity/

https://davidsouthconsulting.org/2022/11/22/bio-ethanol-from-sturdy-and-once-unwanted-indian-plant/

https://davidsouthconsulting.org/2022/02/11/egyptian-youth-turns-plastic-waste-into-fuel/

https://davidsouthconsulting.org/2022/10/25/indian-toilet-pioneer-champions-good-ideas/

https://davidsouthconsulting.org/2023/03/27/pay-for-pee-keeps-indian-town-clean/

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Southern Innovator Issue 1: https://books.google.co.uk/books?id=Q1O54YSE2BgC&dq=southern+innovator&source=gbs_navlinks_s

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Southern Innovator Issue 5: https://books.google.co.uk/books?id=6ILdAgAAQBAJ&dq=southern+innovator&source=gbs_navlinks_s

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