Having a sound faecal sludge management system is of utmost importance in densely populated areas. While poor faecal sludge management in India remains a concern, a few hundred households in Valsad district of south Gujarat have shown the way by linking their toilets to biogas plants. A toilet-linked biogas (TLBG) system eliminates the task of frequent emptying of faecal sludge from septic tanks or twin pits and dumping it in drains or landfill sites.
Under it, a toilet is connected to a biogas digester using a PVC pipe. Faecal slurry flows into the digester with gravity, following which, cattle dung, water, and kitchen waste is regularly added to it to produce biogas, which is then used by families as cooking fuel or for other purposes like heating water.
In a project started by FINISH (Financial Inclusion Improves Sanitation and Health) Society and Vasudhara Milk Cooperative in 2013, 747 households from five clusters of Chikhali, Gandevi, Navsari, Jalalpore, and Maroli in Valsad overcame resistance and superstitions associated with using human excreta.