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  • 3D Home Printing Landmark: 10 Houses in a Day

    3D Home Printing Landmark: 10 Houses in a Day

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    The global South is experiencing urban growth on a scale unprecedented in human history, far outstripping the great urbanization wave that swept across Europe and North America during the 19th and 20th centuries.

    Faced with growth at this pace, governments – both national and local – often become overwhelmed by the rate of change and find it difficult to cope. One of the most common complaints urban-dwellers around the world have is about their living conditions. Even in developed countries, creating enough housing to match demand can be a struggle.

    Quality housing is crucial to human development and quality of life. Adequate living space and access to running water make a significant contribution to people’s health and well-being. Despite this obvious conclusion, millions of urban dwellers live in squalid conditions with poor sanitation, overcrowding, crime, pollution, noise and a general feeling of insecurity. Insecure people find it difficult to access stable jobs and suffer stigma for living in poor-quality neighbourhoods.

    But many initiatives are seeking to speed up the pace of home construction.

    These include the Moladi construction system from South Africa (moladi.net). Moladi uses moulds to assemble houses, so that the building skills required are minimal and easily learned. Built to a template that has been tested for structural soundness and using a design that produces a high-quality home both in structure and appearance, the Moladi system seeks to provide an alternative to makeshift homes that are structurally unsound and vulnerable to fires, earthquakes and other natural disasters.

    Another clever approach is a home and dwelling assembly system developed by architect Teddy Cruz (http://estudioteddycruz.com) (http://visarts.ucsd.edu/faculty/teddy-cruz) that allows slum dwellers to gradually construct a building in stages as they can afford it. It is earthquake-safe and fire resistant.

    Another approach turns to the fast-growing technology of 3D printing (http://en.wikipedia.org/wiki/3D_printing). This technology has gone mainstream in the past five years in the form of desktop-sized 3D printers, or fabricators as they are sometimes called. The machines assemble objects in an additive fashion – layer-by-layer – using digital designs from a computer.

    3D printers can make a complex object without having to resort to mass manufacturing. An accurate, one-off object can be created with the same precision as a machined object. Architects, for example, use the technology to make 3D models of their designs. And now a company in China is hoping to use 3D printers to make houses.

    The WinSun Decoration Design Engineering Co. (http://www.yhbm.com/index.aspx) 3D printed 10 houses in 24 hours in Shanghai’s Qinpu district, reported Business Insider.

    This landmark achievement was accomplished with a giant printer – 152 meters long, 10 meters wide, and 6 meters high – which manufactured walls for the house from a mix of construction waste and cement.

    As a sign of the confidence the company has in the innovative construction technique, it built its own 10,000 square meter headquarters in one month using the same materials. The company’s chief executive officer, Ma Yihe, is also the inventor of the technique. It is a very flexible technology and the material can be tinted different colors according to the customer’s wishes. It is cheap to work with and is also less draining on environmental resources than traditional building materials.

    The 10 houses consist of two concrete side supporting walls with glass panels at the front and back and with a triangle roof. They will be used as offices at a high-tech industrial park in Shanghai. The company has big plans, hoping to use the technology to build more homes – and even skyscrapers.

    Competition is heating up as people around the world seek to perfect 3D technology to print houses to meet the growing demand for dwellings.

    In The Netherlands, Dutch architectural firm Dus Architects (dusarchitects.com)  commissioned the development of a leviathan 3D printer so it could print entire rooms. Modeled on a much smaller home desktop version, the Ultimaker (ultimaker.com), this printer creates whole rooms that are then assembled into custom-built houses.

    The 6-meter high KamerMaker (kamermaker.com), or “room builder”, is being used in Amsterdam to build a full-size house.

    The project is called “3D Print Canal House” (http://3dprintcanalhouse.com/). The printer assembles the rooms individually, and then they are snapped together to make a house. The internal structure of the building blocks are in a honey-comb pattern, which is then filled with a foam that becomes as hard as concrete.

    “For the first time in history, over half of the world’s population is living in cities,” Dus Architects founder Hans Vermeulen told cnet.com. “We need a rapid building technique to keep up the pace with the growth of the megacities. And we think 3D printing can be that technique.

    “We bought a container from the Internet and we transformed it into one of the biggest printers on this planet.”

    This technology can also easily use recycled waste materials and lower the pollution and cost of moving building materials around. The Dus Architects prototype house is expected to take three years to complete (so, still in its early development phase) and will look like a typical Dutch canal house with a pointy, gabled roof (http://www.build.com.au/gabled-roof).

    One of the pioneering advocates for using 3D technology to address the global South’s urbanization and housing challenge has been Larry Sass, director of the Digital Design Fabrication Group (http://ddf.mit.edu/) at the Massachusetts Institute of Technology (MIT).

    Three technologies have been developed at MIT since the 1950s that have made digital fabrication possible – computer numerical control (CNC), which enables computers to control machines; computer-aided design software in the 1960s; and 3D printing in the 1980s to make solid models using digital designs.

    Sass told MIT’s Spectrum newsletter (spectrum.mit.edu) that large-scale 3D printing would mean “buildings will rise faster, use fewer resources, cost less, and be more delightful to the eye than ever before.”

    He envisions a future in which architects will be able to send their designs by computer to a 3D printer and it will then be able to start “printing” the building or a house accurately according to the original designs.

    The conventional way of making buildings has been stuck in the same approach since the 1800s, according to Sass. It uses highly skilled and extensive labour, it is slow and plagued by weather disruptions and urban congestion, and it is expensive, often using materials brought from far away.

    Digitally fabricating buildings takes a radically different approach: the building is made in a series of precision-cut, interlocking parts and then assembled on site like a jigsaw puzzle.

    “It’s the right delivery system for the developing world, because the developing world doesn’t have an infrastructure of tools, air guns, saws and power,” Sass said.

    “Design and high-quality construction is mostly for the rich,” added Sass, who was raised in Harlem, a New York City neighbourhood with high poverty levels. “I’ve always wanted to figure out how to bring design choice and architectural delight to the poor.”

    Published: July 2014

    Resources

    1) 3D Printing Technologies: A website exploring the development of 3D technology. Website: http://www.3d-printing-technologies.com/index.html

    2) Sweet Home 3D: An open source, free interior design software application that allows users to draw the plan of their house, arrange furniture and view in 3D. Website: sweethome3d.com

    3) A video showing how it was done is here: http://www.businessinsider.com/this-video-shows-how-a-company-3-d-printed-10-houses-in-a-day-2014-4.

    4) 3-D Printed Buildings for A Developing World from MIT’s Spectrum. Website: http://spectrum.mit.edu/articles/3-d-printed-buildings-for-a-developing-world/


    This work is licensed under a Creative Commons Attribution 4.0 International License.

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

    © David South Consulting 2023

  • Banning of Plastic Bags and Containers Brings New Opportunities

    Banning of Plastic Bags and Containers Brings New Opportunities

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    This month, Uganda bans plastic bags, outlawing their import, manufacture and use and joining a growing list of African countries seeking to sweep cities of this menace. Uganda’s ban follows similar moves in Kenya and in Tanzania, where even plastic drinks containers will soon be banished. Rwanda, also a member of the East African Community, has gone further – in 2005 the country banned any products made of very thin plastic below 100 microns. The thinner plastic found in plastic bags (under 30 microns) is particularly troublesome because it is easily blown around by the wind. The proliferation of plastic bags and plastic containers across the developing world has not only become an eyesore, it is also an environmental catastrophe that is poisoning the land.

    In Uganda’s capital, Kampala, discarded plastic has combined with toxic waste management practices to make the problem worse. While Kampala has 30 companies dealing in solid waste management, the process is mired in corruption. Poor areas of the city receive no service because it is more profitable for the companies to target wealthy areas for the user fees they collect to remove rubbish.

    Scavengers in the municipal dump of Kampala earn 50 Ugandan pence a day collecting plastic bags. Most plastic bags do not make it to the dump, ending up blown around the city by the wind, washed into drains and water courses. Worse, the rich soil around Uganda’s towns and villages is now covered in plastic bags. A new layer of polythene and contaminated soil has formed in many areas, with an impenetrable crust that stops rain from soaking through. It leaves water stagnating in pools gurgling with methane gas bubbles.

    For entrepreneurs, tackling the mountains of plastic waste is an opportunity – as is providing a replacement once they are banned. A boon time is emerging for the market in recycled and reusable materials and biodegradable alternatives.

    The So Afr-Eco Community Upliftment Project for Rural Women in South Africa is a common example. A project that proves money can be made from recycling discarded plastic bags into useful items. Based in the Obanjeni district in Kwazulunatal, it was founded by Jenny Kirkland, who was disgusted with the proliferation of plastic bags littering South Africa’s countryside. She decided to do something that would also hire rural women and give them an income. The plastic bags are cut into strips of twine and then woven together to make hats, bags, doormats and waistcoats. Run as a for-profit business, it now employs 132 families and exports products to 19 countries, including Australia, the USA, the UK, Canada, Sweden and Poland. South African schools are now provided with sun hats and companies order hats for use at conferences. The profits made from sales are significant by local standards. For example, the sale of one beach bag can feed a small family for two weeks, a hat feeds a family for a week, and a doormat for a month.

    Anita Ahuja, president of the NGO Conserve, has set up a business making fashionable handbags, wallets and shopping bags from recycled plastic bags in New Delhi, India. Begun in 2003, the project collects plastic bags on the streets and keeps 60 women employed. The recycling process does not require additional dyes or inks and is non-toxic. The bags are sold in London, UK and will soon be sold in Italy by the Benetton clothing chain.

    “We braided them and tried weaving them, but the plastic would come loose. Then we hit upon the idea of pressing them to make sheets,” Ahuja said.

    But this issue can be more complex than it first seems. After South Africa banned plastic bags of less than 30 microns in 2003, many poor entrepreneurs have complained that it hit hard their making of hats, handbags, purses and scrubbing brushes from them – something that had become a good livelihood.

    After the bags are banned, environmentalists say the best option is to use reusable bags made of materials that don’t harm the environment during production and don’t need to be discarded after use.

    Alternatives to plastic bags include traditional African baskets or kiondos as they are known in Kenya. Made from sisal and sometimes with leather or wooden handles, the handmade bags support many local women (http://www.propoortourism-kenya.org/african_bags.htm).

    In Kenya, entrepreneurs have also stepped in to offer alternatives to plastic and kiondos. Supermarkets and shops in the country distributed 11 million plastic shopping bags a year, so Joseph Ayuka of Greensphere Enterprises has begun to market cotton bags for their easy portability. “People don’t want to carry bulky bags to the supermarket”, he said.

    Resources

    Creative Commons License

    This work is licensed under a
    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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

    © David South Consulting 2022

  • Brazil Preserves Family Farms and Keeps Food Local and Healthy 

    Brazil Preserves Family Farms and Keeps Food Local and Healthy 

    By David South, Development Challenges, South-South Solutions

    (Havana, Cuba), November 2008

    SOUTH-SOUTH CASE STUDY

    Today’s global food crisis sparked by a toxic mix of events – high oil and commodity prices, food scarcity, growing populations, and environmental catastrophes – has woken many up to the urgent need to secure food supplies and help those who grow the world’s food. More and more countries are turning to local and small farms – or family farms – to offer food security when times get rough.

    Right now there are more than 862 million undernourished people around the world (FAO), and U.N. Secretary- General Ban Ki-moon has called for food production to increase 50 percent by 2030 just to meet rising demand. Three-quarters of the world’s poorest people living on less than US $1 a day live in rural areas in developing countries and 85 percent of the world’s farms are of less than two hectares in size.

    There has long been a tension between those who believe in very large farms, agribusiness and mono-crops (http://en.wikipedia.org/wiki/Mono-cropping), and those who believe in having a large number of smaller farms with a wide variety of crops and animals.

    Family farming has been seen as doomed for a long time. In the 19th century, figures like philosopher Karl Marx believed they would be split into capitalist farms and proletarian labour. Most modern economists regard family farming as an archaic way to grow food, destined to give way to agribusiness. Most family farms refute this, saying family farmers have been able to operate with success in both developed and developing countries.

    And small farms have endured. The livelihoods of more than 2 billion people depend on the 450 million smallholder farms across the world. With their families, they account for a third of the world’s population.

    Family farms are critical to weathering economic crises and ensuring a steady and secure food supply. The International Fund for Agricultural Development (IFAD) (www.ifad.org) called earlier this year for small family farms to be put at the heart of the global response to high food prices and to improve food security. And in Brazil, this call is being answered by a bold initiative to create what they call a “social technology”, combining a house building programme with diverse family farms.

    Brazil is currently buying up unused land and distributing it to people making land claims, including Brazil’s Landless Workers Movement (http://www.mstbrazil.org). When they receive land, family farmers often find there is no house on the land, or just a very basic dwelling.

    This is where the Brazilian farmer’s cooperative Cooperhaf: Cooperativa de Habitacao dos Agricultores Familiares (http://www.cooperhaf.org.br/), steps in. It has put together what it calls a “social technology” combining housing and farm diversification to support family farmers.

    “We see the house as the core issue,” said Adriana Paola Paredes Penafiel, a projects adviser with the Cooperhaf. “The farmers can improve their productivity but the starting point is the house.

    “Family farming is very important for the country – 70 percent of food for Brazilians comes from family farming,” said Penafiel. “The government wants to keep people in rural areas.”

    Started in 2001 by a federation of farmers unions, the Cooperhaf works in 14 Brazilian states with family farmers.

    “Family farmers had to organize themselves to deal with housing,” said Penafiel. “The cooperative was formed to mediate between farmers and the government. The farmers have a right in the law to a house.

    “We promote diversification to make farmers less vulnerable: if they lose a crop in macro farming, they lose everything. We encourage diversification and self-consumption to guarantee the family has food everyday. We help to set up a garden.”

    The concept is simple: a good quality home acts as an anchor to the family farm, making them more productive as farmers. The farmers receive up to 6,000 reals (US $2,290) for a house, and can choose designs from a portfolio of options from the Cooperhaf.

    As in other countries, the Cooperhaf and other coops encourage markets and certification programmes to promote family farmed food and raise awareness. Penafiel says promoting the fact that the food is family farmed is critical: to the consumer it is healthier, fresher and contains fewer chemicals than imported produce.

    “We sell a livelihood not a product. If you get to know the product, you are more conscious of what you eat.”

    In the US, there are almost 2 million farms, 80 percent of which are small farms, a large percentage family-owned. More and more of these farmers are now selling their products directly to the public.

    In the UK, family farms are on course to provide 10 percent of the country’s food and drink and be worth £15 billion a year.

    “If we forget them, we actually may get a situation where, while meeting the world’s immediate supply targets, we wind up with an even greater imbalance in the global supply system and greater food insecurity,” said IFAD President Lennart Båge.

    “Most agri business is for export,” said Penafiel. “If we don’t have food in the country, food for poor communities would not be available. This enables farmers to be more autonomous, not having to buy fertilizers and equipment and take on too much debt. That approach is not sustainable as we saw with the so-called Green Revolution.”

    Published: December 2008

    https://davidsouthconsulting.org/2020/12/14/african-farming-wisdom-now-scientifically-proven/

    https://davidsouthconsulting.org/2022/11/16/brazils-agricultural-success-teaches-south-how-to-grow/

    https://davidsouthconsulting.org/2022/10/10/cheap-farming-kit-hopes-to-help-more-become-farmers/

    https://davidsouthconsulting.org/2022/11/18/farmers-weather-fertilizer-crisis-by-going-organic/

    https://davidsouthconsulting.org/2022/11/01/indonesian-food-company-helps-itself-by-making-farmers-more-efficient/

    https://davidsouthconsulting.org/2022/11/23/kenyan-farmer-uses-internet-to-boost-potato-farm/

    https://davidsouthconsulting.org/2021/11/09/pocket-friendly-solution-to-help-farmers-go-organic/

    https://davidsouthconsulting.org/2021/09/16/small-fish-farming-opportunity-can-wipe-out-malnutrition/

    https://davidsouthconsulting.org/2022/11/11/urban-farming-to-tackle-global-food-crisis/

    https://davidsouthconsulting.org/2022/10/18/woman-wants-african-farming-to-be-cool/

    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.  

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    https://davidsouthconsulting.org/2021/03/05/southern-innovator-issue-3/

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

    © David South Consulting 2023

  • Turning Animal Waste Into Paper

    Turning Animal Waste Into Paper

    By David South, Development Challenges, South-South Solutions

    SOUTH-SOUTH CASE STUDY

    Animal waste is a messy fact of daily life in rural communities across the global South. This byproduct of life has many uses – but an ingredient for making writing paper is probably not the first that springs to mind.

    But animal dung is cleverly being recycled into high-value products in Sri Lanka and Thailand. Both countries have elephants who are under threat. In Sri Lanka (http://en.wikipedia.org/wiki/Sri_Lanka) the large but endangered elephant population is considered a nuisance. They damage crops and are often killed for this reason. There are upwards of 3,000 elephants in the country – down from 14,000 in the 1800s. Nonetheless, they create vast quantities of excrement. In Sri Lanka, they face many threats: ivory poachers, being killed to protect crops and houses, starvation from drought and deforestation.

    Animal waste (http://en.wikipedia.org/wiki/Feces) has many uses: it can be turned into fertilizer for crops, fuel for cooking, placed in a digester and fermented into bio-gas for heating and cooking, and if from a herbivore animal, into fibrous products like paper and cardboard. Packing boxes can also be made from the excrement.

    As a vegetarian animal, elephants’ excrement and dung is made up of vegetable matter and is rich in cellulose (http://en.wikipedia.org/wiki/Cellulose). And cellulose is what makes up the majority of traditional wood-pulp paper (http://en.wikipedia.org/wiki/Pulp_%28paper%29).

    Re-using the waste is also a good way to make elephants valuable to local people, rather than just being perceived as a nuisance.

    Dung produces a natural, recycled paper. While harvesting trees for paper is an expensive and energy-wasting process, the elephant’s digestive tract does the hard work by breaking down the cellulose, making it ideal for the next stage in becoming a paper product.

    According to the Environmental Paper Network (http://www.environmentalpaper.org/stateofthepaperindustry/confirm.htm), 50 percent of the world’s forests have been destroyed, and 80 percent of the remaining forests are in a degraded state.  By turning to alternative sources to make paper, trees are saved and vast quantities of energy reduced. Traditional paper-making also uses many chemicals in the process, something that is avoided in using animal dung. Vegetable products are used to bind the paper together and water-soluble dyes are used to colour the paper.

    Dung paper has earned some high-profile fans as well. The Turner Prize-winning British/Nigerian artist Chris Ofili (http://en.wikipedia.org/wiki/Chris_Ofili), uses elephant dung paper in his works.

    The Elephant Dung Paper company (www.elephantdungpaper.com) in Thailand was one of the first to pioneer the technique. This business was started by dung paper pioneer Mr. Wan Chai. He tells a story of how he became enchanted by the paper-making process when he walked past a paper factory one day. Later, when he was at the Thai Elephant Conservation Center in Lampang, northern Thailand (http://www.changthai.com), he noticed the elephant dung was rich in fibres like those used in making paper from wood pulp.

    Inspired, he embarked on a process of trial and error using his wife’s food processor to turn elephant dung into a fibrous stew that is then shaped, dyed and dried to make paper (http://www.elephantdungpaper.com/process.html).

    Wan Chai has gone on to be a formative influence in the founding of a sheep dung paper making operation in Britain, Creative Paper Wales.

    Another dung paper business is Mr. Ellie Pooh (http://www.mrelliepooh.com/) in Sri Lanka. Established with the goal of reducing conflict between humans and elephants, it has turned to making paper products to boost local incomes and create a direct economic incentive to protect the elephants. It is setting up handmade paper workshops in rural areas and teaming them with artisans to add value to the products and make them more desirable. Design is critical to making any product – no matter how ethically produced and how green – desirable to consumers.

    The dung products Mr. Ellie Pooh makes include a wide variety of coloured papers, scrapbooks, note boxes, stationery pouches, greeting cards, ‘to do’ list pads, memo books, and a children’s book.

    The process of making elephant dung paper takes about 13 days – three days of sorting, boiling and disinfecting, followed by 10 days to pulp, mix, press and dry the paper. Mr. Ellie Pooh makes about 1,000 sheets a day and 30,000 a month. Each sheet makes six A4-size pieces of paper.

    The company was founded by Dr. Karl Wald and Thusitha Ranasinghe, and is managed by recycled paper firm Ecomaximus (http://www.ecomaximus.com/) based in Colombo, Sri Lanka, with a workshop in Kegalle.

    Ecomaximus was started in 1997 by its Managing Director, Ranasinghe, who was following a family tradition going back three generations of working in printing.

    The business started recycling waste printing paper and then moved into recycling a wide variety of other cellulose waste: rice paddy straw, cinnamon and banana bark. It now employs over 35 people on two sites.

    It is proof that it just takes creativity and a new perspective to turn something considered as waste into wealth: and jobs and sustainable incomes.

    Resources

    1) Creative Paper Wales: Makers of Sheep Poo Paper, this company in Wales uses sheep dung to make a range of paper products. Sheep are plentiful in Wales and are found all over the hills grazing. Website: http://www.creativepaperwales.co.uk/index.aspx

    2) Paper High sells online paper products made from Sri Lankan elephant dung. This includes note books, greeting cards, photo frames, and photo albums. Website: http://www.paperhigh.com/products/srilanka/srilanka.htm?gclid=CKbHrdaZv6YCFQkf4Qod-hzaHg

    3) Red Dot: Red dot stands for belonging to the best in design and business. It champions design in business through awards and events. Website: http://en.red-dot.org/

    Creative Commons License

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    Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 License.

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

    © David South Consulting 2022