Performance assessment of different STPs based on UASB followed by aerobic post treatment systems

• Published in: Journal of environmental health science and engineering Vol. 12; no. 1; p. 43
• Main Authors: Khan, Abid Ali, Gaur, Rubia Zahid, Mehrotra, Indu, Diamantis, Vasileios, Lew, Beni, Kazmi, Absar Ahmad
• Format: Journal Article
• Language: English
• Published: London BioMed Central 27-01-2014; BioMed Central Ltd
• Subjects: Capital costs; Earth and Environmental Science; Effluents; Environment; Environmental aspects; Environmental Economics; Environmental Engineering/Biotechnology; Environmental Health; Environmental Law/Policy/Ecojustice; Heavy metals; Industrial wastes; Quality management; Quality of Life Research; Reactors; Research Article; Resource recovery; Sludge; Sulfates; Waste Management/Waste Technology; Water utilities; India; Post treatment systems; Sewage; Upflow anaerobic sludge blanket reactor (UASB); Sewage treatment plants; Odour
• ISSN: 2052-336X; 2052-336X
• DOI: 10.1186/2052-336X-12-43

This paper present the experiences gained from the study of ten up flow anaerobic sludge blanket (UASB) based sewage treatment plants (STPs) of different cities of India. Presently 37 UASB based STPs were under operation and about 06 UASB based STPs are under construction and commissioning phase at different towns. The nature of sewage significantly varied at each STP. Two STP were receiving sewage with high sulfate and heavy metals due to the mixing of industrial waste. The treatment performance of all UASB reactors in terms of BOD, COD and TSS were observed between 55 to 70% respectively. The post treatment units down flow hanging sponge (DHS) and Aeration followed by activated sludge process (ASP) at two STPs were performing well and enable to achieve the required disposal standards. Results indicate the effluent quality in terms of BOD and SS were less than 30 and 50 mg/L and well below the discharging standards.