The project is aimed to deviate a way to recycle household wastewater, As the sewage problem is addressed on a large scale in industries and sewage treatment plants, a significant amount of sewage has accumulated in household societies and thus individual's homes. The main objective of this project is to ensure maximum recycling of water takes place. The two concepts involved in the project are Biological Oxygen Demand (BOD), which is a measurement of the oxygen needed to eliminate waste organic matter from water during aerobic bacteria's decomposition process, and Chemical Oxygen Demand (COD), which calculates how much oxygen is needed to chemically oxidise the organic matter and inorganic nutrients that are present in water. In the project we first begin with a collection of wastewater samples from a housing society near Pune weekly, then we use different chemical methods for sampling and testing the water to get the values of important parameters of water like pH, TSS etc. Then in the next process, the water was treated with a microbial culture of Spirulina, Methanococous, Pseudomonas, etc. which led to a reduction of the BOD of the water. Once we reached the optimal BOD(<= 10) we went ahead and treated the water in batches with a plethora of chemicals like Sodium Hypochlorite, Chlorine, etc. and checked which chemically reduces the COD to the maximum and then we used activated Carbon to remove the smell and colour of the water. The project derives a cycle of processes that reduces the BOD and COD and makes sure that all the parameters of the wastewater, e.g., pH, hardness, TSS, etc., are at the level of uncontaminated water.

Analysis, Parameters, Sewage, Water treatment.