生物絮凝反应器对中试循环水养殖系统中污水的处理效果

发布时间：2018-01-26 02:49

本文关键词： 水产养殖水处理微生物生物絮凝反应器循环水养殖系统水力停留时间　出处：《农业工程学报》2016年08期 　论文类型：期刊论文

【摘要】：试验设计了一种生物絮凝反应器,用作中试规模循环水养殖系统(recirculating aquaculture system,RAS)的唯一水处理装置,研究其在不同水力停留时间(hydraulic retention time,HRT,12、6、4.5、3 h)条件下的运行效果。试验结果表明,反应器可耐受最小HRT为4.5 h,当HRT降低至3 h,反应器发生不可逆的洗出现象而使试验不能继续进行。反应器絮体沉降性能一般,随着HRT的减小(12、6和4.5 h HRT),絮体体积指数(SVI-30)逐渐降低,但是始终大于150 m L/g,为丝状菌膨胀,主要的丝状细菌由TM7 genera incertae sedis逐渐演变为Haliscomenobacter和Meganema菌属,相对丰度逐渐降低。12 h HRT反应器污染物去除率最高。反应器亚硝氮(NO_2~--N)、硝氮(NO_3~--N)在4.5 h HRT出水质量浓度最低,分别为(0.02±0.01)、(1.70±0.06)mg/L;氨氮(total ammonium nitrogen,TAN)、总氮(total nitrogen,TN)、悬浮颗粒物(suspended solids,SS)出水质量浓度在12 h HRT时最低,分别为(0.48±0.05)、(4.47±1.00)、(14.20±8.14)mg/L,同时未造成有机污染。4.5 h HRT对RAS养殖区污染物的控制效果最佳,TAN、NO_2~--N、NO_3~--N、SS质量浓度分别被控制在0.76、0.10、2.95、60.00 mg/L以下。反应器在不同HRT条件下均以异养细菌为主,主要通过同化作用去除TAN,好氧反硝化细菌和厌氧反硝化细菌同时是反应器的优势菌属。反应器可获得较长的稳定运行状态和良好的水处理效果,具有用作RAS核心水处理装置的可行性,该研究可为其在RAS的进一步研究和应用提供参考。
[Abstract]:A bioflocculating reactor was designed to be used as circulating aquaculture system in a pilot scale circulating water culture system. Ras) is the only water treatment plant studied at different HRT hydraulic retention / HRT 12 / 6 / 4.5. The test results showed that the minimum HRT of the reactor was 4.5 h, and the HRT decreased to 3 h. Because of irreversible washing out of the reactor, the experiment could not be carried on. The settling performance of the flocs in the reactor was normal, with the decrease of HRT at 12h and 4.5hHRT). The volume index of flocs (SVI-30) decreased gradually, but it was always larger than 150ml / g, which was the expansion of filamentous bacteria. The main filamentous bacteria evolved from TM7 genera incertae sedis to Haliscomenobacter and Meganema. The relative abundance decreased gradually. 12 h HRT reactor had the highest removal rate of pollutants. The lowest effluent quality concentration was 0.02 卤0.01mg / L at 4.5h / HRT, respectively, and 1.70 卤0.06mg / L for nitrate-nitrate-no _ 3-N _ 3- N, respectively. Total ammonium nitrogenin (TN). The effluent quality concentration of suspended particles was the lowest at 12 h HRT (0.48 卤0.05). 4.47 卤1.00 mg / L, 14.20 卤8.14 mg / L, and no organic pollution. 4.5 h. HRT had the best control effect on pollutants in RAS culture area. The mass concentrations of NO2C-, NnoSs were controlled at 0.76n0.102.95, respectively, and the mass concentration of NnnnsSs was controlled at 0.106 and 0.102.95, respectively. Under 60.00 mg/L, heterotrophic bacteria were dominant in the reactor under different HRT conditions, and TAN was mainly removed by assimilation. Aerobic denitrifying bacteria and anaerobic denitrifying bacteria are the dominant bacteria in the reactor. It is feasible to be used as the core water treatment device of RAS. The research can provide reference for further research and application in RAS.
【作者单位】：上海海洋大学水产与生命学院;上海水产养殖工程技术研究中心;水产动物遗传育种上海市协同创新中心;
【基金】：“十二五”农村领域国家科技计划课题(2012BAD25B03) 浅水跑道式循环淡水养殖系统优化与效果示范(14320501900)
【分类号】：X714;S969.38
【正文快照】： 3.水产动物遗传育种上海市协同创新中心,上海201306)刘文畅,罗国芝,谭洪新,孙大川,刘冰,张世阳.生物絮凝反应器对中试循环水养殖系统中污水的处理效果[J].农业工程学报,2016,32(8):184-191.doi:10.11975/j.issn.1002-6819.2016.08.026 http://www.tcsae.orgLiu Wenchang,Luo G

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