摘要
为了对养殖尾水处理系统中沉淀单元净化能力进行优化,以净化前后养殖尾水总氮(TN)、总磷(TP)和高锰酸钾指数(CODMn)为检测指标,对除磷型改性凹凸棒土(Al@TCAP-P)、除氮型改性凹凸棒土(Al@TCAP-N)、陶粒砂、细菌屋、火山石、吸氨石和活性炭等7种净化材料进行筛选,以研究其最佳添加量和最佳分布方式。结果表明:从整体上看,Al@TCAP-N对TN去除,火山石对TP、CODMn去除效果较好。Al@TCAP-N可在正常沉淀基础上提升36%TN去除率,平铺时去除效果最佳;火山石可提升34%的TP去除率和15%的CODMn去除率,堆积时净化效果最佳。Al@TCAP-N和火山石有利于提升沉淀单元净化效能,最佳添加量分别为5.24 g·L^-1和5.02 g·L^-1。
In order to optimize the purification capacity of the primary precipitation unit of aquaculture wastewater treatment systems,the efficiency of seven purification materials based on three water quality indices,their optimal values,and their distribution was assessed.The three water quality indices included total nitrogen(TN),total phosphorus(TP),and the permanganate index(CODMn).The seven purification materials included phosphorus and nitrogen removal-type Al-impregnated thermally treated calcium-rich attapulgites(Al@TCAP-P and Al@TCAP-N,respectively),ceramsite sand,bacterial house,volcanic stone,ammonia absorption stone,and activated carbon.The results showed that Al@TCAP-N and volcanic stone exhibited overall suitable removal rates TN,TP,and CODMn.Under normal precipitation,the efficiency of Al@TCAP-N to remove TN was 36%,with tiling as the best treatment type.The efficiencies of volcanic stone to remove TP and reduce CODMn were 34%and 15%,respectively,with accumulation as the best treatment type.The additive amounts of Al@TCAP-N and volcanic stone were 5.24 g·L-1 and 5.02 g·L-1,respectively,when they were used in the primary precipitation unit to improve purification efficiency.
作者
王钰钦
郑尧
钱信宇
杨晓曦
陈家长
吴伟
WANG Yu-qin;ZHENG Yao;QIAN Xin-yu;YANG Xiao-xi;CHEN Jia-zhang;WU Wei(Wuxi Fishery College,Nanjing Agricultural University,Wuxi 214081,China;Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi 214081,China)
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2020年第11期2621-2630,共10页
Journal of Agro-Environment Science
基金
中央级公益性科研院所基本科研业务费专项资金项目“典型养殖池塘尾水集中处理关键技术及要素优化研究”(2019JBFZ06)
现代农业产业技术体系专项(CARS-46)。
关键词
养殖尾水
初级沉淀单元
水质净化材料
火山石
改性凹凸棒土
aquaculture wastewater
primary precipitation unit
water purification materials
volcanic stone
modified attapulgite
