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当前位置: 首页 > 文章 > 好氧反硝化茵RWX31强化污染废水脱氮的研究 农业环境科学学报 2013,32 (010) 2047-2054
Position: Home > Articles > Bioaugmentation on Nitrate Removal from Simulated Wastewater by Aerobic Denitrifying Bacterium RWX31 Journal of Agro-Environment Science 2013,32 (010) 2047-2054

好氧反硝化茵RWX31强化污染废水脱氮的研究

作  者：
周影茹;陆玉芳;施卫明
关键词：
好氧反硝化菌;碳氮比;硝态氮浓度;生物反应器
摘  要：
为了深入挖掘好氧反硝化菌株RWX31在农业面源污染治理中的应用价值,通过纯培养试验研究在不同NO3-N浓度负荷和C/N条件下的该菌反硝化脱氮效率,并利用该菌株强化小型反应器(4L)中模拟废水(硝态氮浓度为200mg·L-1)的脱氮效果.结果表明,相比于对照菌株ACCC01047,RWX31菌株可以耐受更高的硝态氮污染负荷(200~400mg·L-1)和更低的C/N(6-10).利用菌株强化反应器对污染废水的处理,在水力停留时间为24h情况下,投加菌株RWX31对NO3-N污染废水的去除率为80%左右,而投加对照菌株的去除率仅为60%.菌株RWX31单位COD去除NO3-N的能力为0.35~0.4mgN·mg~COD,而对照菌株在等量的COD碳源供应情况下对NO3-N的去除能力较低.模拟废水条件下的结果表明,菌株RWX31可能比较适应于碳氮比较低而氮素污染变幅较大的农业面源污染废水的生物脱氮处理,在实际应用中可望降低处理成本,提高脱氮效率.
译  名：
Bioaugmentation on Nitrate Removal from Simulated Wastewater by Aerobic Denitrifying Bacterium RWX31
关键词：
aerobic denitrifying bacterium%carbon nitrogen ration%nitrate concentration%bioreactor
摘  要：
To explore the application potential of aerobic denitrifying bacterium RWX31 in agriculttiral non-point source pollution treat- ment, batch experiments were conducted to investigate nitrate removal efficiency of the strain under different NO3-N loads and C/N condi- tions, and bioaugmentation effects by the strain on simulated wastewater(NO3-N concentration 200 rag" L-l) in a small bioreactor(4L) were also studied. The results showed that, compared with control strain ACCC01047, strain RWX31 bad higher tolerance to nitrate-N load(200- 400 mg" L-I ) and lower requirement of C/N ( 6-10 ). Under hydraulic retention time of 24 h, bioaugmentation by strain RWX31 on simulated wastewater had good performance of 80% nitrate-N removal efficiency, while control strain had only about 60%; the nitrate removal ability of strain RWX31 was 0.35-0.4 mgN ~ mg-ICOD, higher than that of control strain, meaning RWX31 consumed less carbon source in the NO3-N removal process. These characters make strain RWX31 have higher biological nitrogen removal efficiency and lower cost of wastewa- ter treatment, and may have great potential in practical application of wastewater treatment with low C/N and high nitrogen concentration such as agricultural non-point source wastewater.

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