Ecological Remediation Technology of Water Quality in Small Watershed

A set of ecological treatment technology for consolidation and improvement of water quality in small watershed was developed.Indigenous microorganisms in watershed water were screened and expanded.The microorganisms with different degradation functions and symbiotic or symbiotic relationship were mixed and cultured in an appropriate proportion to make a composite microbial agent.The ratio of Bacillus subtilis，yeast，lactic acid bacteria，photosynthetic bacteria and nitrifying bacteria was 3∶3∶2∶1∶1.Based on premise of pollution interception and source control，through introduction of microbial agents into watershed water，at the same time，technologies such as aeration and oxygenation，ecological floating island and biological film hanging were put into operation，ecology of water body in the basin was restored，water quality was improved and self-purification capacity of water body was enhanced.