污泥协同香蕉秸秆中温厌氧发酵中pH对产酸的影响
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摘要
污水厂的提标改造需要投入更多碳源保证脱氮除磷效果,而厌氧发酵液中的VFA可作为廉价碳源用于脱氮除磷。为获得更高产量的VFA,为污水厂提供廉价优质碳源,采用批式实验研究了不同pH值(5.5、6.5、7.5、8.5、9.5、10.5)条件下污泥和香蕉秸秆混合发酵VFA的产量情况。研究结果表明:在发酵第2天,各pH值实验组VFA均达到最高浓度,pH=6.5组的VFA浓度为所有实验组中最高,为7122 mg/L,故为最佳实验pH条件。碱性条件下,虽然溶出的糖类物质和蛋白质更高,但VFA的产量低于酸性条件;市政污泥和香蕉秸秆混合发酵可以提高VFA的产量,为污泥单独发酵VFA产量的2.3～3.2倍。
The upgrading and reconstruction of the wastewater treatment plants requires more carbon sources to ensure the efficiency of nitrogen and phosphorus removal, and the VFA in anaerobic fermentation liquid can be used as cheaper carbon source to remove nitrogen and phosphorus. In order to obtain higher yield of VFA to provide the sewage plant with cheaper, high-quality carbon source, this paper adopted the batch experiment to study the yield of VFA in mixed fermentation of sewage sludge and banana straw under different pH values(5.5, 6.5, 7.5, 8.5, 9.5, 10.5). The results showed that: the VFA concentration of each pH value group reached the highest on the 2 nd day, and the VFA concentration in the pH=6.5 group(the optimal pH value) was 7122 mg/L which was the highest in all experimental groups; although the dissolved concentrations of total soluble sugar and total soluble protein were higher under alkaline condition, the concentration of VFA was higher under acidic condition; the mixed fermentation of sewage sludge and banana straw could increase the yield of VFA, which was 2.3～3.2 times of that by the individual fermentation of the sewage sludge.
The upgrading and reconstruction of the wastewater treatment plants requires more carbon sources to ensure the efficiency of nitrogen and phosphorus removal, and the VFA in anaerobic fermentation liquid can be used as cheaper carbon source to remove nitrogen and phosphorus. In order to obtain higher yield of VFA to provide the sewage plant with cheaper, high-quality carbon source, this paper adopted the batch experiment to study the yield of VFA in mixed fermentation of sewage sludge and banana straw under different pH values(5.5, 6.5, 7.5, 8.5, 9.5, 10.5). The results showed that: the VFA concentration of each pH value group reached the highest on the 2 nd day, and the VFA concentration in the pH=6.5 group(the optimal pH value) was 7122 mg/L which was the highest in all experimental groups; although the dissolved concentrations of total soluble sugar and total soluble protein were higher under alkaline condition, the concentration of VFA was higher under acidic condition; the mixed fermentation of sewage sludge and banana straw could increase the yield of VFA, which was 2.3～3.2 times of that by the individual fermentation of the sewage sludge.
引文
[1] 国家环境保护总局. GB 18918—2002城镇污水处理厂污染物排放标准[S]. 北京:中国环境科学出版社,2012.
[2] Kampas P, Parsons S A, Pearce P, et al. An internal carbon source for improving biological nutrient removal[J]. Bioresource Technology, 2009, 99(1):149-154.
[3] 黄星发,韦永平,张超,等.南宁市埌东污水厂提标改造的化学除磷研究[J].中国给水排水,2014,30(21):79-81.
[4] 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.
[5] 罗哲,周光杰,刘宏波,等.污泥厌氧产酸发酵液作碳源强化污水脱氮除磷中试研究[J].环境科学,2015,36(3):1000-1005.
[6] Zhang C,Chen Y G.Simultaneous nitrogen and phosphorus recovery from sludge-fermentation liquid mixture andapplication of the fermentation liquid to enhance municipal wastewater biological nutrient removal[J].Environmental Science & Technology,2009,43 (16): 6164-6170.
[7] 章涛,黄天寅,刘锋,等.SRT对剩余污泥厌氧发酵产酸的影响研究[J].中国给水排水,2017,33(5):116-119.
[8] Zhang L, Zhang S, Wang S, et al. Enhanced biological nutrient removal in a simultaneous fermentation, denitrification and phosphate removal reactor using primary sludge as internal carbon source[J]. Chemosphere, 2013, 91(5):635-640.
[9] 李月寒,周丰,吕亮,等.剩余污泥和餐厨垃圾发酵液作为反硝化碳源可利用性研究[J].水处理技术,2016,42(11):29-33,38.
[10] Jin D, Chen J, Lun S. Production of poly(hydroxyalkanoate) by a composite anaerobic acidification-fermentation system[J]. Process Biochemistry, 1999, 34(8):829-833.
[11] Du G, Chen J, Yu J, et al. Kinetic studies on poly-3-hydroxybutyrate formation by Ralstonia eutropha, in a two-stage continuous culture system[J]. Process Biochemistry, 2001, 37(3):219-227.
[12] Shen C, Zeng Q, Guo Y. Research progress of utilization of excess sludge with microbial fuel cell technology[J]. Chemical Industry & Engineering Progress, 2011, 30(9):2075-2079.
[13] Peng Z, Chen Y G, Qi Z. Waste activated sludge hydrolysis and short-chain fatty acids accumulation under mesophilic and thermophilic conditions: effect of pH[J]. Water Research, 2009, 43(15):3735-3742.
[14] Chen Y, Jiang S, Yuan H, et al. Hydrolysis and acidification of waste activated sludge at different pHs[J]. Water Research, 2007, 41(3):683-689.
[15] 国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社, 2002:216-219.
[16] Dubois M, Gilles K A, Hamilton J K, et al. Colorimetric method for determination of sugars and related substances[J]. Analytical Chemistry, 1956, 28(3):350-356.
[17] 宁开桂.实用饲料分析手册[M].北京:中国农业科技出版社,1993:96-100.
[18] 黄天寅,巫华,吴玮,等.pH值对污泥发酵产酸的影响[J].环境工程学报,2013,7(1):329-332.
[19] 李杨,段小睿,苑宏英,等.pH对剩余污泥厌氧酸化的影响[J].中国给水排水,2010,26(17):8-11.
[20] Ward A J, Hobbs P J, Holliman P J, et al. Optimisation of the anaerobic digestion of agricultural resources[J]. Bioresource Technology, 2008, 99(17):7928-7940.
[21] 陈兴春,郑颖,刘宏波,等.基于pH调控的城市污泥厌氧发酵产酸小试研究[J].环境科学学报,2015,35(4):1067-1073.
[2] Kampas P, Parsons S A, Pearce P, et al. An internal carbon source for improving biological nutrient removal[J]. Bioresource Technology, 2009, 99(1):149-154.
[3] 黄星发,韦永平,张超,等.南宁市埌东污水厂提标改造的化学除磷研究[J].中国给水排水,2014,30(21):79-81.
[4] 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.
[5] 罗哲,周光杰,刘宏波,等.污泥厌氧产酸发酵液作碳源强化污水脱氮除磷中试研究[J].环境科学,2015,36(3):1000-1005.
[6] Zhang C,Chen Y G.Simultaneous nitrogen and phosphorus recovery from sludge-fermentation liquid mixture andapplication of the fermentation liquid to enhance municipal wastewater biological nutrient removal[J].Environmental Science & Technology,2009,43 (16): 6164-6170.
[7] 章涛,黄天寅,刘锋,等.SRT对剩余污泥厌氧发酵产酸的影响研究[J].中国给水排水,2017,33(5):116-119.
[8] Zhang L, Zhang S, Wang S, et al. Enhanced biological nutrient removal in a simultaneous fermentation, denitrification and phosphate removal reactor using primary sludge as internal carbon source[J]. Chemosphere, 2013, 91(5):635-640.
[9] 李月寒,周丰,吕亮,等.剩余污泥和餐厨垃圾发酵液作为反硝化碳源可利用性研究[J].水处理技术,2016,42(11):29-33,38.
[10] Jin D, Chen J, Lun S. Production of poly(hydroxyalkanoate) by a composite anaerobic acidification-fermentation system[J]. Process Biochemistry, 1999, 34(8):829-833.
[11] Du G, Chen J, Yu J, et al. Kinetic studies on poly-3-hydroxybutyrate formation by Ralstonia eutropha, in a two-stage continuous culture system[J]. Process Biochemistry, 2001, 37(3):219-227.
[12] Shen C, Zeng Q, Guo Y. Research progress of utilization of excess sludge with microbial fuel cell technology[J]. Chemical Industry & Engineering Progress, 2011, 30(9):2075-2079.
[13] Peng Z, Chen Y G, Qi Z. Waste activated sludge hydrolysis and short-chain fatty acids accumulation under mesophilic and thermophilic conditions: effect of pH[J]. Water Research, 2009, 43(15):3735-3742.
[14] Chen Y, Jiang S, Yuan H, et al. Hydrolysis and acidification of waste activated sludge at different pHs[J]. Water Research, 2007, 41(3):683-689.
[15] 国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社, 2002:216-219.
[16] Dubois M, Gilles K A, Hamilton J K, et al. Colorimetric method for determination of sugars and related substances[J]. Analytical Chemistry, 1956, 28(3):350-356.
[17] 宁开桂.实用饲料分析手册[M].北京:中国农业科技出版社,1993:96-100.
[18] 黄天寅,巫华,吴玮,等.pH值对污泥发酵产酸的影响[J].环境工程学报,2013,7(1):329-332.
[19] 李杨,段小睿,苑宏英,等.pH对剩余污泥厌氧酸化的影响[J].中国给水排水,2010,26(17):8-11.
[20] Ward A J, Hobbs P J, Holliman P J, et al. Optimisation of the anaerobic digestion of agricultural resources[J]. Bioresource Technology, 2008, 99(17):7928-7940.
[21] 陈兴春,郑颖,刘宏波,等.基于pH调控的城市污泥厌氧发酵产酸小试研究[J].环境科学学报,2015,35(4):1067-1073.