文章摘要
钱伟,陆开宏,郑忠明,伍华雯,邵路路,陈辉煌.碳源及C/N对反硝化细菌净化循环养殖废水的影响[J].水产学报,2012,36(12):1880~1890
碳源及C/N对反硝化细菌净化循环养殖废水的影响
Effects of carbon source and C/N ratio on treatment of aquaculture wastewater by denitrification
投稿时间:2012-03-13  修订日期:2012-05-31
DOI:DOI:10.3724/SP.J.1231.2012.28032
中文关键词: 养殖废水  反硝化脱氮  碳源  碳氮比
英文关键词: aquaculture wastewater  denitrification  carbon source  C/N ratio
基金项目:国家“八六三”高技术研究发展计划(2007AA10Z409);宁波大学2010年研究生优秀学位论文培育基金(PY20100012)
作者单位E-mail
钱伟 应用海洋生物技术教育部重点实验室 txqianwei1986@163.com 
陆开宏 应用海洋生物技术教育部重点实验室 lukaihong@nbu.edu.cn 
郑忠明 应用海洋生物技术教育部重点实验室  
伍华雯 应用海洋生物技术教育部重点实验室  
邵路路 应用海洋生物技术教育部重点实验室  
陈辉煌 应用海洋生物技术教育部重点实验室  
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中文摘要:
      针对目前循环养殖废水水质处理过程中存在脱氮碳源不足的问题,本文以高NO3--N降解能力和低NO2--N积累量为碳源优化指标,研究了乙醇、丙三醇、葡萄糖、蔗糖、乙酸钠和酒石酸钾钠6种碳源及不同碳氮比(C/N)对复合菌群净化循环养殖废水效果的影响。试验结果显示,不同碳源及C/N对养殖废水的NH4 -N去除率并无显著差异,且各处理组的NH4 -N去除率高达98%左右,显著地高于对照组(p<0.05);当以葡萄糖、蔗糖等糖类物质为外加碳源时,试验过程中有明显的NO2--N积累现象;当以醇类物质为外加碳源时,NO2--N积累量几乎为零,且NO3--N去除率高达90%左右,显著地高于对照组(58.96%);特别是以乙醇为外加碳源且C/N为3.0时,复合菌群对养殖废水的TN、NH4 -N和NO3--N去除率分别高达93.28%、98.90%和91.82%。虽然外加碳源短期内会引起水体CODMn含量大幅升高,但可被反硝化细菌迅速降解;此外,外加碳源还能改善水体pH值,经处理组净化后的水体pH值维持在7.5左右。试验结果表明,循环养殖废水水质净化过程中添加相应的碳源及并适当控制C/N比能显著改善池水水质,提高生物脱氮效率。
英文摘要:
      To address the problem of insufficient carbon source in the treatment of aquaculture wastewater by denitrification, this study tested the effects of six carbon sources and different C/N ratio, using the removal rate of ammonium nitrogen and accumulation rate of nitrite as indicators. The results showed that carbon sources and C/N ratio did not significantly impact the removal rate of ammonium nitrogen, which was up to 98% in the treatment groups, significantly higher than that in the control group (p<0.05). When glucose and glycerol were used as the carbon sources, there was clear nitrite accumulation. When alcohols was used as the carbon source, the accumulation of nitrite was almost zero, whereas the removal rate of nitrate was up to 90%, significantly higher than that in the control group (59%). When ethanol was used as the carbon source and C/N ratio was 3.0, the removal rate of total nitrogen, ammonia nitrogen and nitrate were especially high, up to 93.28%, 98.90% and 91.82%, respectively. Although the extra carbon could substantially increase the concentration of CODMn, but it maybe rapidly degraded by denitrifing bacteria within a short time. In addition, the extra carbon could improve the stability of pH value of aquaculture wastewater to be between 7.2~7.8. The results of the present study suggest that the extra carbon source could significantly improve water quality and biological nitrogen removal efficiency during wastewater purification process in recirculating aquaculture systems.
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