Monitoring and analysis of wastewater pollutants from a demonstrative recirculating aquaculture factory
一个示范性循环水养殖厂废水污染物的监测与特征分析

In present study, we monitored the wastewater produced by a demonstrative recirculating aquaculture factory co-using on-line monitoring and grab sampling at multiple drainage ditches, investigated the major sources of the characteristic pollutants by data analysis, and brought our opinions forward for the further development of recirculating aquaculture. We found that the concentrations of pollutants were correlated with the growth phases of fish cultured in the corresponding tanks. COD was dominated by the dissolved matters, even though the variant amount of suspended solid resulted in the deviation of chemical oxygen demand (COD) of wastewater from the different tanks. Most of nitrogen or phosphorus compounds occurred in dissolved states, especially the inorganic forms.