固液分离塔-垂直流人工湿地技术处理池塘圈养尾水的应用研究  

APPLICATION STUDY OF SOLID-LIQUID SEPARATION TOWER COUPLED VERTICAL FLOW CONSTRUCTED WETLAND IN POND-CULTIVATED TAILWATER

作　　者：周小荻 李金能 王洁 贾智明 何绪刚[1,2,3] 侯杰 ZHOU Xiao-Di;LI Jin-Neng;WANG Jie;JIA Zhi-Ming;HE Xu-Gang;HOU Jie(College of Fisheries,Huazhong Agricultural University,Wuhan 430070,China;Engineering Research Center of the Ministry of Education for Green Development of Bulk Aquatic Biological Industry in the Yangtze River Economic Belt,Wuhan 430070,China;Key Laboratory of Aquaculture Facilities Engineering,Ministry of Agriculture and Rural Affairs,Wuhan 430070,China)

机构地区：[1]华中农业大学水产学院,武汉430070 [2]教育部长江经济带大宗水生生物产业绿色发展教育部工程研究中心,武汉430070 [3]农业农村部水产养殖设施工程重点实验室,武汉430070

出　　处：《水生生物学报》2023年第11期1798-1806,共9页Acta Hydrobiologica Sinica

基　　金：国家自然科学基金面上项目(32172977和31972797)资助。

摘　　要：为有效减少池塘圈养尾水的污染负荷,提升养殖水环境质量,研究对调查了池塘圈养殖中期(8—10月)池塘圈养尾水污染物含量特征进行了检测,评估了固液分离塔和垂直流人工湿地单元对池塘圈养尾水处理能力,并分析了固液分离塔-垂直流人工湿地工艺净化养殖尾水水体的效果。研究结果表明,池塘圈养尾水中总氮(TN)和总磷(TP)浓度分别为12.65—15.12和4.74—6.89 mg/L,铵态氮(NH_(4)^(+)-N)和亚硝态氮(NO_(2)^(-)-N)浓度分别为3.91—5.03和0.26—0.41 mg/L。固液分离塔沉降1h后,池塘圈养尾水中TN和TP平均去除率分别为35.05%和62.85%,沉降后联合垂直流人工湿地,通过进水COD/N调节DO浓度改善间歇曝气人工湿地,NH_(4)^(+)-N、NO_(2)^(-)-N和可溶性磷酸盐(PO_(4)^(3-)-P)出水平均浓度分别为0.45、0.02和0.48 mg/L,TN和TP平均去除率可达到68.04%和81.49%,可基本实现池塘圈养尾水的循环利用或达标排放。Although the pond captive model has several practical advantages,such as being ecologically friendly,resource conserving,and economic effective,research on the treatment mode of pond-cultivated tailwater is still relatively insufficient.In order to reduce the pollution load of captive tailwater and improve the environmental quality of cultured water,we systematically investigated the characteristics of contaminant content in pond-cultivated tailwater during the middle period (from August to October) of pond circle cultivation.The study evaluated the treatment capacity of a solid-liquid separation tower and vertical flow constructed wetland unit for pond captive tailwater,and analyzed the effect of the solid-liquid separation tower vertical flow artificial wetland process to purify cultured tailwater bodies.The results showed that after settling for 1h using a solid-liquid separation tower,the average removal rates of TN and TP in pond-cultivated tailwater were 35.05%and 62.85%,respectively.After settling in a combined vertical flow constructed wetland and improving the intermittent aerated constructed wetland by adjusting the influent COD/N the DO concentration was improved and the average concentrations ofNH_4~+-N、NO_2--N and soluble phosphate(PO_4~(3-)-P) in the reused tailwater were 0.45,0.02 and 0.48 mg/L,and the average TN and TP removal rates reached68.04%and 81.49%,respectively,recycling or up to the standard discharge of pond-cultivated tailwater in ponds can be achieved.

关 键 词：溶解氧 进水碳氮比 脱氮除磷 池塘圈养 养殖尾水 垂直流人工湿地 

分 类 号：X522[环境科学与工程—环境工程]