以污泥微氧水解发酵液为碳源处理低C/N城市污水
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摘要
采用污泥微氧水解发酵液为碳源用于厌氧/好氧/缺氧模式运行的SBR工艺处理低C/N城市污水,考察了不同C/N下系统的脱氮除磷能力。结果表明:随着C/N的提高,SBR工艺的脱氮除磷效果逐渐强化,当C/N在7、8时,系统内出现了反硝化除磷现象,并在C/N=8时实现了高效同步脱氮除磷,对COD、NH4+-N、TN、TP的去除率分别为93.7%、98.9%、84.3%、96.1%,出水满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)一级A标准。
Sludge micro-oxygen hydrolysis fermentation liquid as the carbon source have been used in SBR process operated in anaerobic/aerobic/anoxic mode for treating the urban sewage with low C/N ratio,and the denitrification and dephosphorization capabilities of the system with different C/N ratios are investigated. The results show that with the increase of C/N ratio,the denitrification and dephosphorizaation capabilities of SBR process are enhanced gradually. When C/N ratio is 7 or 8,denitrifying dephosphorization phenomena occur in the system. When C/N=8,highly efficient and synchronous denitrification and dephosphorization are achieved,and the removing rates of COD,NH_4~+-N,TN and TP are 93.7%,98.9%,84.3% and 96.1% respectively. The effluent water quality reaches Level 1-A standard specified in the Discharge standard of Pollutants for Urban Sewage Treatment Plants(GB 18918—2002).
Sludge micro-oxygen hydrolysis fermentation liquid as the carbon source have been used in SBR process operated in anaerobic/aerobic/anoxic mode for treating the urban sewage with low C/N ratio,and the denitrification and dephosphorization capabilities of the system with different C/N ratios are investigated. The results show that with the increase of C/N ratio,the denitrification and dephosphorizaation capabilities of SBR process are enhanced gradually. When C/N ratio is 7 or 8,denitrifying dephosphorization phenomena occur in the system. When C/N=8,highly efficient and synchronous denitrification and dephosphorization are achieved,and the removing rates of COD,NH_4~+-N,TN and TP are 93.7%,98.9%,84.3% and 96.1% respectively. The effluent water quality reaches Level 1-A standard specified in the Discharge standard of Pollutants for Urban Sewage Treatment Plants(GB 18918—2002).
引文
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[10] Kishida N,Kim J,Tsuneda S,et al. Anaerobic/oxic/anoxic granular sludge process as an effective nutrient removal process utilizing denitrifying polyphosphate-accumulating organisms[J]. Water Research,2006,40(12):2303-2310.
[11] Wang Yayi,Geng Junjun,Ren Zhongjia,et al. Effect of COD/N and COD/P ratios on the PHA transformation and dynamics of microbial community structure in a denitrifying phosphorus removal process[J]. Journal of Chemical Technology and Biotechnology,2013,88(7):1228-1236.
[12]姜鸣,张静慧,宫飞蓬,等.生物反硝化除磷技术研究进展[J].净水技术,2011,30(6):11-15.
[13] Wachtmeister A,Kuba T,Van Loosdrecht M,et al. A sludge characterization assay for aerobic and denitrifying phosphorus removing sludge[J]. Water Research,1997,31(3):471-478.
[14]许德超,陈洪波,李小明,等.静置/好氧/缺氧序批式反应器(SBR)脱氮除磷效果研究[J].环境科学学报,2014,34(1):152-159.
[15]杨杰,李冬,罗亚红,等. SBR后置缺氧反硝化除磷的启动及去除性能[J].中国环境科学,2016,36(5):1376-1383.
[2]刘智晓,季民,郝赟,等.利用活性污泥水解发酵补充碳源优化脱氮除磷[J].中国给水排水,2013,29(4):12-16.
[3] Zheng Xiong,Chen Yinguang,Liu Chenchen,et al. Waste activated sludge alkaline fermentation liquid as carbon source for biological nutrients removal in anaerobic followed by alternating aerobic-anoxic sequencing batch reactors[J]. Chinese Journal of Chemical Engineering,2010,18(3):478-485.
[4] Wang Qunhui,Kuninobu M,Ogawa H I,et al. Degradation of volatile fatty acids in highly efficient anaerobic digestion[J]. Biomass and Bioenergy,1999,16(6):407-416.
[5]高鹏,张栋,贾舒婷,等.污水厂污泥厌氧消化产短链脂肪酸研究进展[J].化工进展,2013,32(9):2227-2232.
[6]宋秀兰,李亚新,冀文侃.微氧水解酸化处理污泥方法:CN,102583927A[P]. 2012-07-18.
[7]国家环保总局.水和废水的监测分析方法[M]. 4版.北京:中国环境科学出版社,2002:38-47.
[8] Wang Yayi,Jiang Fan,Zhang Zhaoxiang,et al. The long-term effect of carbon source on the competition between polyphosphorus accumulating organisms and glycogen accumulating organism in a continuous plug-flow anaerobic/aerobic(A/O)process[J]. Bioresource Technology,2010,101(1):98-104.
[9]赵庆,袁林江,王磊,等.碳源浓度对SBR法同步脱氮除磷的影响试验研究[J].西北大学学报:自然科学版,2006,36(4):599-602.
[10] Kishida N,Kim J,Tsuneda S,et al. Anaerobic/oxic/anoxic granular sludge process as an effective nutrient removal process utilizing denitrifying polyphosphate-accumulating organisms[J]. Water Research,2006,40(12):2303-2310.
[11] Wang Yayi,Geng Junjun,Ren Zhongjia,et al. Effect of COD/N and COD/P ratios on the PHA transformation and dynamics of microbial community structure in a denitrifying phosphorus removal process[J]. Journal of Chemical Technology and Biotechnology,2013,88(7):1228-1236.
[12]姜鸣,张静慧,宫飞蓬,等.生物反硝化除磷技术研究进展[J].净水技术,2011,30(6):11-15.
[13] Wachtmeister A,Kuba T,Van Loosdrecht M,et al. A sludge characterization assay for aerobic and denitrifying phosphorus removing sludge[J]. Water Research,1997,31(3):471-478.
[14]许德超,陈洪波,李小明,等.静置/好氧/缺氧序批式反应器(SBR)脱氮除磷效果研究[J].环境科学学报,2014,34(1):152-159.
[15]杨杰,李冬,罗亚红,等. SBR后置缺氧反硝化除磷的启动及去除性能[J].中国环境科学,2016,36(5):1376-1383.