工厂化海水养殖尾水中活性磷酸盐混凝沉淀去除研究  

Study on the removal of active phosphate in the tailwater of industrializedmariculture by coagulation sedimentation

作　　者：倪琳琳 卢洋 刘恒明 冯诗雨 谷晶 杨国军 王华 NI Linlin;LU Yang;LIU Hengming;FENG Shiyu;GU Jing;YANG Guojun;WANG Hua(College of Fisheries and Life Science,Dalian Ocean University,Dalian 116023,China;College of Marine Science and Technology and Environment,Dalian Ocean University,Dalian 116023,China)

机构地区：[1]大连海洋大学水产与生命学院,辽宁大连116023 [2]大连海洋大学海洋科技与环境学院,辽宁大连116023

出　　处：《中国渔业质量与标准》2024年第2期14-21,共8页Chinese Fishery Quality and Standards

基　　金：国家重点研发计划项目(2022YFE0117900);辽宁省教育厅基础研究项目(LJKFZ20220240);设施渔业教育部重点实验室(大连海洋大学)开放课题(202223);辽宁省科技计划(20220011);辽宁省教育厅项目(QL202001)。

摘　　要：本研究采用基于聚合硫酸铁(PFS)的混凝沉淀除磷工艺,构建了混凝沉淀除磷装置,并将其应用于红鳍东方鲀(Takifugu rubripes)工厂化海水养殖尾水中活性磷酸盐的去除。结果表明,化学混凝沉淀方法可有效去除海水养殖尾水中的活性磷酸盐,PFS的最适投加量为55 mg/L,红鳍东方鲀工厂化海水养殖尾水中COD Mn浓度不影响水中活性磷酸盐的去除效果,尾水盐度的下降和除磷装置流量控制均有利于尾水中活性磷酸盐的去除。当红鳍东方鲀工厂化养殖尾水中活性磷酸盐的初始浓度为0.254 mg/L时,除磷装置的流量控制在100 L/h时,180 min后尾水中磷的去除率达到78.7%,出水中活性磷酸盐的残留浓度已降至0.054 mg/L,满足海水养殖尾水排放要求。本研究可为化学混凝沉淀除磷工艺在工厂化海水养殖尾水处理中的实际应用提供参考。This study employed a coagulation precipitation phosphorus removal process based on polymeric ferric sulfate(PFS)to construct a coagulation precipitation phosphorus removal device,which was then applied to the removal of active orthophosphate from the tailwater of industrialized marine culture of Takifugu rubripes.The results showed that the active orthophosphate in the mariculture tailwater could be effectively removed by the chemical coagulation precipitation method,and the optimal dosage of PFS is 55 mg/L.The removal efficiency of active orthophosphate is not affected by the concentration of COD Mn in the tailwater of the industrialized marine culture of Takifugu rubripes.The decrease in salinity of the tailwater and the flow rate control of the phosphorus removal device are both beneficial for the removal of active orthophosphate.When the initial concentration of active orthophosphate in the tailwater of the industrialized culture of Takifugu rubripes is 0.254 mg/L,and the flow rate of the phosphorus removal device is controlled at 100 L/h,the removal rate of orthophosphate reaches 78.7%after 180 min of treatment.The residual concentration of active orthophosphate in the effluent is reduced to 0.054 mg/L,meeting the requirements for the discharge of the tailwater from mariculture.This study provides a device for the practical application of chemical coagulation precipitation phosphorus removal processes in the treatment of industrial mariculture tailwater.

关 键 词：红鳍东方鲀 养殖尾水 除磷 混凝沉淀 聚合硫酸铁 

分 类 号：S959[农业科学—水产养殖]