Application of Comprehensive Techniques of Bio-Remediation in a Black-Odor River of a Small Town, South Jiangsu Provinc
The Huajia River is closed, still channel, and has been heavily polluted and become a malodorous black river. The integrated techniques of bioremediation including aeration, adding compound microbial preparation, bio-stuffing have been used for improving the water quality since 2008. The result of five years(2008-2013) monitoring showed that water transparency and dissolved oxygen has been promoted, COD decreased significantly since 2012 which indicated level Ⅲ~Ⅳ, while TP and ammonia-N still remained level Ⅴ. According to the monthly survey during 2012-2013, the average phytoplankton biomass of the project area was lower than that of the reference area, and cyanobacteria dominated in summer and autumn while Euglenophyta, Cryptophyta and diatoms dominated in winter and spring, mostly belonging to polysaprobic and α- type moderate pollution indicators, meanwhile the species richness is relatively low.