New Waste Management Tech Could Improve Life In Rural India: Study
Anew technology for waste management could help villages in India reduce indoor air pollution, improve soil health, and generate clean energy, according to a study.
In a paper published in the journal Science of the Total Environment, resaerchers produced a detailed breakdown of how a process called pyrolysis could turn biomass waste like rice straw, manure and wood into a solution for three common problems at once.
Pyrolysis is a kind of chemical recycling that turns leftover organic materials into their component molecules. It works by sealing the waste inside an oxygen-free chamber and heating it to more than 400 degrees Celsius, producing useful chemicals in the process.
In the paper, the researchers from the University of Glasgow in the UK outlined how three products of pyrolysis -- bio-oil, syngas and biochar fertiliser -- could help villagers live healthier and greener lives with more productive farmland. The research also lays out a series of recommendations for maximising the system's economic viability.
The project began with a survey of nearly 1,200 rural households across Odisha, investigating their experiences of cooking, powering their homes, and farming.
Over 80 per cent of those surveyed wanted to switch from cooking indoors with smoke-producing coal to cleaner options, and access to reliable grid electricity was a priority for almost all respondents.
About 90 per cent said they would be willing to sell agricultural waste to support bioenergy, the researchers found.
The feedback helped inform the team's design for a communitylevel pyrolysis system called "BioTRIG" which would run on waste and provide a series of benefits for rural communities who live below the poverty line.
The syngas and bio-oil would help heat and power the pyrolosis system in future cycles, with surplus electricity used to power local homes and businesses, the researchers said.
The clean-burning bio-oil could also be used to replace dirty cooking fuels in homes, and biochar could be used to store carbon while improving soil fertility, they said.
Computer simulations of how effective the BioTRIG system could be in real-world applications showed that it could help drop greenhouse gas emissions from communities by nearly 350 kilograms of carbon dioxide equivalent per capita per annum.