Non-sewer sanitation systems are widely implemented for treatment and management of faecal sludge (FS) and septage in developing nations. India became an open defecation free (ODF) country in 2019, with more than 90 million toilets at rural and urban level constructed to achieve this ODF status. Government of India also initiated a faecal sludge and septage management (FSSM) policy in 2017. This paper highlights the policy vision for the state of Rajasthan and predicts options for a safely managed sanitation system through exploring the fuel potential of faecal sludge generated in the city. The intended study is an attempt to valorize faecal sludge into a marketable product through determining the heat capacity of dried faecal sludge from different sources such as pit toilets, septic tanks etc. In the present work in urban Jaipur, which is already a water scarce city, various onsite sanitation systems were targeted to collect FS samples from different locations. It was observed that the FS generated has a high heating value of 13.96 MJ/kg, with total solids ranges from 7 to 9%. For a pragmatic resource recovery option, the experimental data observed is validated with a literature review.
Poor management of water sources is one of the major challenge for developing nations to provide safe water to increasing population. The Central Ground Water Board, India 2019 reports that all 13 zones of Jaipur city are in the dark zone. Dark zones are those area where the ground water exploitation is extremely high and are notified for protection by the State Government. With a population of 4.1 million, Jaipur city has a water demand deficit of around 125 MLD with dependence on ground water is increasing tremendously. The city's water table has gone down 25 metres in the last decade. Higher concentrations of fluoride, nitrate, and total dissolved solids, is a common problem in the city's ground water. Presently the city gets its water from Bisalpur dam which is 120 km away, proved to be a very costly arrangement. This paper analyses the various contaminants present in ground water. A detailed survey and data collection was done, which was further analysed through GIS spatial distribution, predicting the concentration in all 91 wards of the city. Results show that some wards are at a critical point in terms of deteriorating water quality to be addressed by city planners and urban local bodies.
Comparing to wastewater management practices, various treatment options available for Faecal Sludge (FS) are almost a century old. 2.7 billion People across the globe, mainly in the developing nations are relying on “On Site Sanitation Systems”, OSS or unsewered sanitation. This situation will last for decades as city wide sanitation through sewer lines is neither feasible nor affordable. It is estimated that by the year 2030, almost five billion people across the globe would be relying on OSS. This paper focuses on issues of FS in developing nations, the huge gaps in sanitation value chain, the technological options available and innovations in treating FS through “Omni Processor”. With ultimate aim of removing pathogens and converting FS into water and electricity it works on various technological options that are not limited to super critical oxidation, pyrolysis, combustion and so on.
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