Effects and Mechanisms of the Bionic Micro-aeration Technology in Rural Domestic Sewage Purification
Rural domestic sewage is one of the main pollution sources in lake or river eutrophication.In this study,the bionic micro-aeration technology was raised and experiments were carried out to examine the purification effects and the microbe community situation of the biofilm attached to the artificial macrophytes.The results showed that pH values were maintained in normal range and DO concentration in range of 2.0 to 2.6 mg·L-1 in bionic micro-aeration treatments.This technology showed high removal efficiencies for SS,COD,TP,NH3-N and TN with the removal rates of 79.6%,87.6%,53.0%,89.2%,69.4%at the tenth day,respectively.The bionic micro-aeration treatment exhibited lower removal efficiencies than the normal aeration treatment(P<0.05)for SS,COD,TP,NH3-N at the second day and the fourth day,however the differences between the two treatments were not obvious at the sixth day and later(P>0.05).While removal efficiencies for TN were always higher in the bionic micro-aeration treatments than those in the normal aeration treatments(P<0.05).The mi-crobial communities of the bionic micro-aeration treatments showed better characteristics than those of the nor-mal aeration treatment in biofilm biomass,PN contents,PS contents and bacterial diversity.This technology ex-hibited broad application prospect in rural domestic sewage treatment,which would contribute to the ecological protection and high-quality development of the Yellow River basin.
万方数据
维普
