On World Bathroom Day, Spark Architecture presented a prototype of odorless that transforms human waste into biogas, of which building materials of great local availability can be used.

According to United Nations data, 892 billion people do not have national health infrastructure. It is common in low-income countries with limited access to water and public sanitation.

When stool is not properly processed, it can pollute water and soil. The most vulnerable are children under five. One of the countries facing this problem is India.

World Bath Day is celebrated on November 19. In 2018, Singaporean company Spark Architecture presented a model of a toilet that converts human waste into biogas.

How does this toilet work?

It is a thirteen-meter structure that can produce electricity for 8 rural households. It is made up of a series of 3D printed modules with a buried biogas dome.

Human waste, food scraps, animal waste and other organic matter are deposited in the anaerobic digester. The material breaks down and produces methane, which is stored in an underground biogas chamber.

The biogas feeds a microcogeneration unit (cogeneration of heat and electricity) which provides gas for cooking and lighting in homes.

The printed shell includes a cup and basin. It can be customized according to the materials available in the environment, be it clay, wood or others that we may have on site.

The company is also researching the use of plastic containers, as it would be a good idea if the toilets were made with local recycled plastic, it would avoid another problem for local communities.

Spark Architecture’s proposal for India consists of toilet modules printed from a mix of treated bamboo fiber and rubber resin. This was done at the request of the government, as bamboo is an abundant resource in the country.

In 2013, the United Nations Under-Secretary-General issued a call to action on public sanitation. One of the proposed objectives is precisely linked to the elimination of open defecation by 2025.

More information: sparkarchitects.com

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