摘要
针对水产养殖尾水低碳氮比导致脱氮除磷效率不高的问题,研制了基于3-羟基丁酸酯和3-羟基戊酸酯共聚物(PHBV)/火山岩/黄铁矿协同耦合的生物过滤装置,并对其处理养殖尾水的效果进行了分析。设计了2组不同滤料填充量的过滤装置,柱1装置从上至下依次填充黄铁矿15 cm、混合滤料15 cm和火山岩5 cm,柱2装置填充黄铁矿10 cm、混合滤料15 cm和火山岩10 cm,分析了不同填料质量比对脱氮除磷效率的影响。结果表明,柱2装置对硝酸盐氮的平均去除率达到了97.8%,显著高于柱1装置(p<0.05),而柱2对磷酸盐的平均去除率低于柱1,平均去除率仅为35.0%。增加火山岩质量比有助于提升装置对硝酸盐的去除效率,而增加黄铁矿质量比有助于提高装置对磷酸盐的去除效率。当溶解氧浓度在1.2~1.5 mg/L之间时,装置可以同时进行脱氮除磷。综上所述,采用PHBV/火山岩/黄铁矿协同强化处理工艺可以实现养殖尾水中氮磷等营养盐的同步去除,为解决养殖尾水深度净化问题提供了新方法。
In order to address the low nitrogen and phosphorus removal efficiencies caused by a low carbon-to-nitrogen ratio in aquaculture effluents,a biofiltration device based on the synergistic coupling of 3-hydroxybutyrate and 3-hydroxyvalerate copolymers(PHBV)with volcanic rock and pyrite was developed and evaluated for its efficacy in treating aquaculture effluents.Two groups of filter devices with different filler contents were designed.In column 1,the device was filled with 15 cm of pyrite,15 cm of mixed filter media,and 5 cm of volcanic rock from top to bottom.In column 2,the device was filled with 10 cm of pyrite,15 cm of mixed filter media,and 10 cm of volcanic rock.The effects of different filler mass ratios on the efficiencies of denitrification and phosphorus removal were analyzed.The results showed that the average removal rate of nitrate nitrogen reached 97.8%in column 2,significantly higher than that in column 1(p<0.05).However,the average removal rate of phosphate was lower than that in column 2,with an average removal rate of only 35.0%.Increasing the mass ratio of volcanic rock improved the removal of nitrate,while increasing the mass ratio of pyrite improved the removal of phosphate.Simultaneous removal of nitrogen and phosphorus was achieved when the dissolved oxygen concentration ranged from 1.2 to 1.5 mg/L.In conclusion,the process of synergistic enhancement of PHBV with volcanic rock and pyrite can achieve the simultaneous removal of nitrogen,phosphorus and other nutrients in aquaculture effluent,providing a new idea and a new method for solving the problem of deep purification of aquaculture effluent.
作者
张海耿
王芳颖
曹鑫圆
孙雅婷
许中硕
张宇雷
ZHANG Haigeng;WANG Fangying;CAO Xinyuan;SUN Yating;XU Zhongshuo;ZHANG Yulei(Fishery Machinery and Instrument Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200092,China;School of Navigation and Marine Engineering,Dalian Ocean University,Dalian 116000,China;College of Marine and Biological Engineering,Yancheng Institute of Technology,Yancheng 224000,China;School of Environmental Science and Engineering,Donghua University,Shanghai 200092,China)
出处
《能源环境保护》
2024年第1期151-158,共8页
Energy Environmental Protection
基金
国家重点研发计划资助项目(2023YFD2400402)
中国水产科学研究院中央级公益性科研院所基本科研业务费专项资金资助项目(2023YJ01)。
