Biological Aerating Tower

Abstract

Nutrient removal from the waste water is essential to prevent eutrophication. This study explains about the designing of the nutrient removal system. Study mainly comprises of the nutrient removal, different methods available, designing of such systems and a case study. Study is conducted to obtain the suitability of biological aerating tower (a system for nutrient removal). Experiments results were analysed and hence used to obtain the suitability of biological aerating tower. Along with above mention aim another aim to conduct study is to have full exposure of Design, fabrication, procurement, selection of materials, quality inspection and commissioning. The system consists of unique method of treatment in which large microbial mass was supported by the polystyrene media. Within the biological reactor effluent was first fed into the anoxic zone after that it was allowed to flows into the aerobic zone. The effluent has given sufficient recirculation in order to obtain the sufficient reduction in the nitrate nitrogen. Result shows that biological aerating tower can be used as a treatment process for total nitrogen removal from the waste water. The result shows that reactor can be operated at an HRT of 8 hrs with more than 92% COD removal and 93% total nitrogen removal is achieved.