餐厨垃圾固相物料与厨余垃圾混合中温厌氧消化工程中试研究
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摘要
试验采用有效容积为4 m~3的全混式反应器,在中温(35℃)的条件下,分别进行了单一餐厨垃圾固相物料(S1)、餐厨垃圾固相物料(S1)与厨余垃圾(S2)的混合物料(S3)(混合比为2∶1)厌氧消化工程中试。结果表明,单一餐厨垃圾固相物料(S1)厌氧消化最佳运行工况为进料有机负荷(OLR)为80 kg·d~(-1),停留时间(HRT)为50 d;当OLR增至115 kg·d~(-1)时,其平均容积产气率由2.04 m~3·m~(-3)d~(-1)降至2.02 m~3·m~(-3)d~(-1),气体甲烷含量由61.1%降至38.4%。混合物料(S3)日进料量由80 kg提升至120 kg时,平均容积产气率由2.11 m~3·m~(-3)d~(-1)升高至2.30 m~3·m~(-3)d~(-1),甲烷含量亦由61.9%升高至63.8%。因此,将餐厨垃圾固相物料与厨余垃圾进行混合可以有效改善物料厌氧性能,其有机负荷以及甲烷产率均表现出明显优势。
Under mesophilic condition(35℃), pilot-scale experiments on anaerobic digestion with sole solid phase material of food waste and mixed with kitchen waste(mixing ratio 2∶1) were carried out respectively, using a 4 m~3 full mixed reactor. The results showed that when the feedstock was the sole solid phase material of food waste, optimum operating condition was OLR of 80 kg·d~(-1), HRT of 50 d. When the OLR increased to 115 kg·d~(-1), the average volumetric gas production rate decreased from 2.04 m~3·m~(-3)d~(-1) to 2.02 m~3·m~(-3)d~(-1), and the methane content decreased from 61.1% to 38.4%. When the feedstock was the mixture, and when the OLR increased from 80 kg·d~(-1) to 120 kg·d~(-1), the average volumetric gas production rate increased from 2.11 m~3·m~(-3)d~(-1)to 2.3 m~3·m~(-3)d~(-1), the methane content increased from 61.9% to 63.8%. Therefore, co-digestion could improve the anaerobic digestion performance of food waste and kitchen waste with both OLR and the methane content increased obviously.
Under mesophilic condition(35℃), pilot-scale experiments on anaerobic digestion with sole solid phase material of food waste and mixed with kitchen waste(mixing ratio 2∶1) were carried out respectively, using a 4 m~3 full mixed reactor. The results showed that when the feedstock was the sole solid phase material of food waste, optimum operating condition was OLR of 80 kg·d~(-1), HRT of 50 d. When the OLR increased to 115 kg·d~(-1), the average volumetric gas production rate decreased from 2.04 m~3·m~(-3)d~(-1) to 2.02 m~3·m~(-3)d~(-1), and the methane content decreased from 61.1% to 38.4%. When the feedstock was the mixture, and when the OLR increased from 80 kg·d~(-1) to 120 kg·d~(-1), the average volumetric gas production rate increased from 2.11 m~3·m~(-3)d~(-1)to 2.3 m~3·m~(-3)d~(-1), the methane content increased from 61.9% to 63.8%. Therefore, co-digestion could improve the anaerobic digestion performance of food waste and kitchen waste with both OLR and the methane content increased obviously.
引文
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[13] Chugh S,Chynoweth D P,Clarke W,et al.Degradation of unsorted municipal solid waste by a leach-bed process[J].Bioresource Technology,1999,69(2):103-115.
[2] 饶坤,谭小红,黄安娜,等.二级串联UASB反应器处理餐厨垃圾废水研究[J].中国给水排水,2014,30(21):23-26.
[3] 王金辉,饶坤,黄安娜,等.中温UASB反应器处理餐厨垃圾废水中试研究[J].中国给水排水,2016,32(17):1-5.
[4] Zhang R,Elmashad H M,Hartman K,et al.Characterization of food waste as feedstock for anaerobic digestion.[J].Bioresource Technology,2007,98(4):929-935.
[5] 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.
[6] 付胜涛,严晓菊,付英.剩余活性污泥和厨余垃圾的混合中温厌氧消化[J].环境科学,2006,27(7):1459-1463.
[7] 郭燕锋,孔晓英,刘婉玉,等.有机负荷对厨余垃圾常温厌氧发酵产甲烷的影响[J].农业工程学报,2011,27(s1):96-100.
[8] 蒋滔,李平,任桂英,等.餐厨垃圾与玉米秸秆混合中温发酵产气效果模拟[J].生态与农村环境学报,2015,31(1):124-130.
[9] 高瑞丽,严群,阮文权.添加厨余垃圾对剩余污泥厌氧消化产沼气过程的影响[J].生物加工过程,2008,6(5):31-35.
[10] 贺延龄.废水的厌氧生物处理[M].北京:中国轻工业出版社,1998.
[11] Xu S,Wu D,LüFan,et al.Influence of total solid content and ratio of inoculum to substrate on anaerobic digestion of lincomycin biowaste[J].China Environmental Science,2010,30(3):362-368.
[12] 李东,孙永明,袁振宏,等.原料比例和pH值对厨余垃圾和废纸联合厌氧消化的影响[J].过程工程学报,2009, 9(1):53-58.
[13] Chugh S,Chynoweth D P,Clarke W,et al.Degradation of unsorted municipal solid waste by a leach-bed process[J].Bioresource Technology,1999,69(2):103-115.