title: Combination of up-flow anaerobic sludge blanket reactor and a novel cascade sponge reactor for sewage treatment.
abstract: Performance of the combined process of up-flow anaerobic sludge blanket (UASB) reactor and cascade sponge reactor (CSR) for sewage treatment was studied. UASB-CSR system was operated at HRTs of 24 h, 16 h, and 8 h at an average wastewater temperature of 29°C. It comprises of the most efficient combined process not only for COD(T) (98.9%), BOD(T) (98.5%), TSS (99.3%), total nitrogen (89.1%), total phosphorus (99.0%), total coliform (99.9%) and fecal coliform (99.9%) removal but also for reducing excess sludge production. Fecal coliform counts were found 23 MPN/100 ml only in final effluents. The effluent quality of the system sufficiently meets the discharged standards which regulate wastewater discharge into drains. The parameters of CSR are closely related to those of the potable water after certain advanced treatment which can be reused in many ways. Moreover, it does not require any external aeration and thus the cost associated with energy and devices required for aeration are cut to zero.
authors: Department of Chemical Engineering, S.V. National Institute of Technology, Surat, Gujarat 395007, India.
authors: K
authors: K
authors: Patel
authors: A K
authors: AK
authors: Mungray
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D008855:Microscopy, Electron, Scanning; D012722:Sewage; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D012722:Sewage