The high fluoride level in drinking water sources in many parts of India and its impact on human health has increased the importance of defluoridation studies. Several individual studies have been conducted using different defluoridation techniques; but the number of comparative studies is less in literature.

In this paper, a concept of ecological sanitation has been discussed in details. Ecological sanitation (ecosan) is a system designed for making sanitation and agriculture complementary, as it aims at reuse of reclaimed nutrients to the soil, and conserve valuable water resources.

This paper outlines the integrated approach in decentralised planning, designing and execution of master plan 2025 for the treatment and disposal of sewage of Pune city.

Point sources such as landfills can release high concentrations of pollutant into the groundwater because of migration of leachate from its bottom, which is generated primarily as a result of precipitation falling on an active landfill surface, leaching out the potential organic and inorganic contaminants from landfilled waste and discharging the same to groundwater in underlying aquifer.

There are 15 distilleries in Tamil Nadu under operation. The distillery effluent (mainly spent wash) is dark brown in colour and acidic in nature. It contains high percentage of dissolved organic, inorganic matter and potassium. Till year 2000 these units had disposed the partly treated effluent on land as fertilizer and stored in lined lagoon for solar evaporation.

Window composting technology is known to have strong odour emission feature as a result of which the plants based on Ms technology often experience resistance from the community where they are set up. In order to improve acceptance of die plants among die host communities, it is desirable to mitigate their environmental impact by incorporating essential pollution control measures.

This paper outlines the recent magnetic ion exchange process (MIEX process) to remove dissolved organic carbon and control of toxic THMs in drinking water supply.

Adsorption occupies an important position among the unit operations in wastewater treatment. It exploits the ability of certain solids preferentially to concentrate specific substances from solution onto their surfaces. This paper deals with different adsorption systems as solution to wastewater problems.

Recent study on ground water quality in Lakshadweep Islands shows that groundwater in these islands are mainly contaminated by domestic sewage and sea water intrusion. Contamination by domestic sewage is attributed to tank used by the islanders for sewage disposal. In the present study, an Anaerobic Single Baffled Reactor is introduced as an improvement to these tanks.

The paper is about the removal of arsenic from aqueous solution using the bacterial species Acidithiobacillus ferrooxidans. The bacterium was cultured under aseptic condition.