A treatment equipment for aquaculture wastewater was constructed by denitrification biofilter coupled with flow-separated biochemical process,with the main purpose for nitrogen removal from wastewater and considering other indicators to met the processing standard.Under field conditions,the removal efficiency of the experimental equipment on the main pollutants in aquaculture wastewater with low C/N and high DO was investigated.Under the operating conditions of intermittent inlet and outlet water,no aeration,and HRT of 4.8 h,the changes of water qualityindexes and the removal rate of major pollutants after aquaculture wastewater purification were analyzed through continuous monitoring for 6 months.The results showed that the experimental equipment had nice effects in denitrification and nitrogen removal efficiency for aquaculture wastewater with respect to low C/N and high DO,and had good treatment effect on other pollutants.Water quality at the outlets was improved obviously and met the standard of Requirement for Water Discharge from Freshwater Aquaculture Pond(SC/T 9101-2007)stably.
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