The Environmental Management & Energy Investigative Research (EMEIR) project is an initiative of Blue Gate Public Health Promotion Initiative. The broad objective of this project is to identify different sustainable methods of increasing and optimizing biogas production with multiple digestions and landfill, its efficiency for cooking, electricity and as a gaseous vehicle fuel, and associated effects on human health and environment.

This experimental study will be carried by establishing a standard environmental research lab, biomechanical workshop and biogas production plant. A three-stage digesters will be constructed using 1000 pieces of clear plastic cylindrical tank of 5000 liters each, which will be feed with multiple digestion of human excreta, food wastes and agro-wastes. The physical and chemical composition of the raw materials will be evaluated before and after digestion using standard procedures. Active gas technique will also be used in extracting biogas from landfill.

Cryogenic technology which is an integrated technology for biogas upgrading, and CO2 and biomethane liquefaction will be used for this project. This will be used for upgrading biogas generated from both the digesters and landfill with a flow rate of 400-600 Nm3/h of raw biogas. This system will allow to reach the high methane purity level required for liquefaction by removing necessary pollutants (H2, N2, N2O, H2O, H2S, NH3 and O2). The purified CO2 and CH4 will then be liquefied at -78.50C and -1620C respectively. Liquid CO2 will be compressed at 5.5 bars while liquefied Biomethane (LBM) will then be compressed into cylinders at pressure of 5 bars for cooking, electricity and as a gaseous vehicle fuel. The digesters slurry will also be used in producing bio-fertilizer. A total of 10000 participants will be randomly selected for a prospective case-control study to determine the efficiency of LBM and bio-fertilizer, and associated environmental and health impact.

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