Removal of pollution indicating bacteria in simulated stabilization pond systems

Abstract

Abstract: In this paper, the removal efficiencies of total coliforms(TC), fecal coliforms(FC), fecal streptococcus(FS) and heterotrophic plate count(HPC) in simulated stabilization pond systems were studied. In the system treating10 t of wastewater per day, the densities of TCand FCdecreased by 4 orders of magnitude in9 days at 16℃. Bacterial enumeration in the system treating90 t of wastewater per day was conducted yearly. The densities of TCand FCin its effluent decreased by 2.5 and 3 orders of magnitude respectively. The effluent quality of the system, in terms of TC, reached approximately to Ⅲ degree of surface water quality standard. According to WHO's standard, the effluent quality, in terms of FC, was of "slight pollution". The results indicated that the two systems can effectively remove TCand FC.

Key words: Stabilization pond, Pollution indicating bacteria, Removal efficiency

Wan Dengbang, Qiu Changqiang, Sun Xingxiang, Ma Ning. Removal of pollution indicating bacteria in simulated stabilization pond systems[J]. Chinese Journal of Applied Ecology, 1992, 3(1): 76-80.

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