剩余污泥与柑橘渣协同厌氧消化特性研究
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摘要
以剩余污泥和废弃柑橘渣为原料,在中温条件下,开展两者的协同厌氧消化产气研究。结果表明,废弃柑橘渣和剩余污泥联合厌氧消化,能有效提高消化系统性能,增加消化气和甲烷产量,具有良好的协同效应。但对消化产物的脱水性能有一定的负面影响。污泥和废弃柑橘渣的VS投配比是影响消化过程的关键参数。当剩余污泥和柑橘渣VS投加配比为2∶1时,产消化气产率和甲烷产率最高分别为296.4、151.7 mL/g VS;当剩余污泥和柑橘渣的VS投加配比为1∶2时,产甲烷的协同效应最好,为217%;当污泥和柑橘渣的配比过低为1∶4时,消化系统p H值降低幅度大且回升速度慢、VFAs积累,有机物利用低,协同效应不明显。
Anaerobic co-digestion of excess sludge and citrus pulp were studied to elucidate their synergistic effect under mesophilic conditions. The results showed that the combined anaerobic digestion of citrus slag and excess sludge can effectively improve the performance of the digestive system and increase the production of digestive gas and methane with synergistic effects. However, it has a certain negative impact on the dehydration performance of the digested products.The ratio of excess sludge and citrus pulp is found to be the key parameter effecting the digestion process. The mixed ratio(based on VS addition)group of sludge and citrus at 2∶1 reached the maximum biogas and methane yield at 296.4 mL/g VS and 151.7 mL/g VS.When the ratio of sludge to citrus slag is 1∶2, the synergistic effect of methanogenesis is the best at 217%. When the ratio of sludge to citrus slag is too low(1∶4), the p H value of the digestive system is greatly reduced, the recovery rate is slow, the VFAs are accumulated, and the utilization of organic matter is low, and the synergistic effect is not obvious.
Anaerobic co-digestion of excess sludge and citrus pulp were studied to elucidate their synergistic effect under mesophilic conditions. The results showed that the combined anaerobic digestion of citrus slag and excess sludge can effectively improve the performance of the digestive system and increase the production of digestive gas and methane with synergistic effects. However, it has a certain negative impact on the dehydration performance of the digested products.The ratio of excess sludge and citrus pulp is found to be the key parameter effecting the digestion process. The mixed ratio(based on VS addition)group of sludge and citrus at 2∶1 reached the maximum biogas and methane yield at 296.4 mL/g VS and 151.7 mL/g VS.When the ratio of sludge to citrus slag is 1∶2, the synergistic effect of methanogenesis is the best at 217%. When the ratio of sludge to citrus slag is too low(1∶4), the p H value of the digestive system is greatly reduced, the recovery rate is slow, the VFAs are accumulated, and the utilization of organic matter is low, and the synergistic effect is not obvious.
引文
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[2]范勇.城镇污水厂污泥处理处置现状分析及其工程方案论证[J].净水技术,2018,37(7):93-96.Fan Yong.Analysis of present situation of treatment and disposal for municipal sewage sludge and demonstration of the engineering proposal[J].Water Purification Technology,2018,37(7):93-96.
[3]Dai X,Duan N,Dong B,et al.High-solids anaerobic co-digestion of sewage sludge and food waste in comparison with mono digestions:stability and performance[J].Waste Management,2013,33(2):308-316.
[4]Li H,Zou S,Li C,et al.Alkaline post-treatment for improved sludge anaerobic digestion[J].Bioresource Technology,2013,140:187-191.
[5]贾涛.我国市政污泥处理的现状与发展探讨[J].中国高新技术企业,2016(31):66-67.Jia Tao.Current situation and development of municipal sludge treatment in China[J].China High-Tech Enterprises,2016(31):66-67.
[6]王永会,赵明星,阮文权.餐厨垃圾与剩余污泥混合消化产沼气协同效应[J].环境工程学报,2014,8(6):2536-2542.Wang Yonghui,Zhao Mingxing,Ruan Wenquan.Synergistic effect of anaerobic co-digestion of food waste and excess sludge[J].Chinese Journal of Environmental Engineering,2014,8(6):2536-2542.
[7]廖燕,蔡赋涵,周敬红,等.餐厨垃圾的加入量对市政污泥厌氧消化的影响[J].轻工科技,2012(7):102-104.Liao Yan,Cai Fuhan,Zhou Jinghong,et al.Effect of the amount of food waste on anaerobic digestion of municipal sludge[J].Light Industry Science and Technology,2012(7):102-104.
[8]Noutsopoulos C,Mamais D,Antoniou K,et al.Anaerobic co-digestion of grease sludge and sewage sludge:the effect of organic loading and grease sludge content[J].Bioresource Technology,2013,131:452-459.
[9]Gergely F,Mohammad P,Claes N,et al.Methane production from citrus wastes:process development and cost estimation[J].Journal of Chemical Technology&Biotechnology,2015,87(87):250-255.
[10]Martín M A,Siles J A,Chica A F,et al.Biomethanization of orange peel waste[J].Bioresource Technology,2010,101(23):8993-8999.
[11]洪林,杨蕾,李勋兰,等.重庆市柑橘产业发展现状与主要成效[J].南方农业,2018,12(19):78-80.Hong Lin,Yang Lei,Li Xunlan,et al.Development status and main results of citrus industry in Chongqing[J].Southern Agriculture,2018,12(19):78-80.
[12]国家环境保护总局.水和废水监测分析方法[M].第四版,北京:中国环境科学出版社,2009.State Environmental Protection Administration.Water and Wastewater Monitoring and Analysis[M].Fourth Edition.Beijing:China Environmental Science Press,2009.
[13]Wilkie A C,Smith P H,Bordeaux F M.An economical bioreactor for evaluating biogas potential of particulate biomass[J].Bioresource Technology,2004,92(1):103-109.
[14]赵云飞.餐厨垃圾与污泥高固体浓度厌氧发酵产沼气研究[D].无锡:江南大学,2012.Zhao Yunfei.Process on High-Solids Anaerobic Fermentation for Converting Food Waste and Excess Sludge to Biogas[D].Wuxi:Jiangnan University,2012.
[15]Xie S,Lawlor P G,Frost J P,et al.Effect of pig manure to grass silage ratio on methane production in batch anaerobic co-digestion of concentrated pig manure and grass silage[J].Bioresource Technology,2011,102(10):5728-5733.
[16]何品晶,潘修疆,吕凡,等.p H值对有机垃圾厌氧水解和酸化速率的影响[J].中国环境科学,2006,26(1):57-61.He Pinjing,Pan Xiujiang,Lyu Fan,et al.The influence of pH value on anaerobic hydrolysis and acidogenesis rates of biodegradable organic waste[J].China Environmental Science,2006,26(1):57-61.
[17]任南琪.厌氧生物技术原理与应用[M].北京:化学工业出版社,2004:339.Ren Nanqi.Principle and Application of Anaerobic Biotechnology[M].Beijing:Chemical Industry Press,2004:339.
[18]Siegert I,Banks C.The effect of volatile fatty acid additions on the anaerobic digestion of cellulose and glucose in batch reactors[J].Process Biochemistry,2005,40(11):3412-3418.
[19]许丽娟,朱光灿,吕锡武,等.腐熟蓝藻与厌氧污泥混合厌氧发酵特性[J].环境工程学报,2013,7(9):3345-3350.Xu Lijuan,Zhu Guangcan,Lyu Xiwu,et al.Biogas production through anaerobic digestion from the mixture of decomposed cyanobacteria and anaerobic sludge[J].Chinese Journal of Environmental Engineering,2013,7(9):3345-3350.
[20]张彬,蒋滔,高立洪,等.猪粪与玉米秸秆混合中温发酵产气效果[J].环境工程学报,2014,8(11):4991-4997.Zhang Bin,Jiang Tao,Gao Lihong,et al.Aerogenesis characteristics of swine feces mixed with corn straw under mesophilic fermentation[J].Chinese Journal of Environmental Engineering,2014,8(11):4991-4997.
[21]吕凡,何品晶,邵立明,等.pH值对易腐有机垃圾厌氧发酵产物分布的影响[J].环境科学,2006,27(5):991-997.Lyu Fan,He Pinjing,Shao Liming,et al.Effect of pH value on fermentation pathways of biodegradable organic waste[J].Environmental Science,2006,27(5):991-997.
[22]Xie S,Wickham R,Nghiem L D.Synergistic effect from anaerobic co-digestion of sewage sludge and organic wastes[J].International Biodeterioration&Biodegradation,2017,116:191-197
[23]孙静.果胶多糖的降解及其产物的分离分析与活性研究[D].西安:西北大学,2009.Sun Jing.Studies on Pectin Degradation and Pectin Oligosaccharides Abstract[D].Xi'an:Northwest University,2009.
[24]Chu C P,Chang B V,Liao G S,et al.Observations on changes in ultrasonically treated waste-activated sludge[J].Water Research,2001,35(4):1038-1046.