臭氧预处理市政污泥厌氧湿发酵特性研究
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摘要
以臭氧预处理市政污泥为厌氧发酵底物,以厌氧消化污泥为接种物,通过批次实验着重考察臭氧投加量和底物TS体积分数对系统运行性能的影响.运行数据表明,在臭氧投加量为0. 01～0. 06g·g~(-1)TS的范围内,系统甲烷产量、SCOD去除率及VSS去除率随投加量的提高而升高.考虑到运行经济性,投加量0. 05 g·g~(-1)TS确定为最佳运行条件,系统甲烷产量、SCOD去除率及VSS去除率分别(323±2. 1) m L、86. 7%和(65. 5±0. 9)%,较对照组分别提高了100. 6%、86. 7%和59%.在TS体积分数2%～8%的范围内,系统甲烷产量随TS体积分数的升高而增加,而SCOD去除率和VSS去除率变化不大.在最佳TS体积分数8%下,系统甲烷产量、SCOD去除率及VSS去除率分别为(618±5.3) m L、(86. 5±3. 9)%和(68. 8±5. 5)%.
The influence of ozone addition and TS concentration on anaerobic wet digestion using ozone-treatment municipal sludge as substrate and anaerobic digestion sludge as inoculum by batch tests. Methane production,SCOD removal rate and VSS removal rate increased with improved ozone addition in the range of 0. 01 g·g~(-1) TS ～ 0. 06 g·g~(-1) TS. Considering operation economy,the optimum operation condition of 0. 05 g·g~(-1) TS of ozone addition was determined and methane production,SCOD removal rate and VSS removal rate was determined to be( 323 ± 2. 1) mL,86. 7% and( 65. 5 ± 0. 9) %,respectively,at this condition. Compared with control group,methane production,SCOD removal rate and VSS removal rate was improved by 100. 6%,86. 7% and 59%,respectively. With TS concentration from 2% to 8%,methane production increased with improved TS concentration,in contrast,SCOD removal rate and VSS removal rate showed slight variation. Methane production,SCOD removal rate and VSS removal rate was determined to be( 618 ± 5. 3) mL,( 86.5 ± 3. 9) % and( 68. 8 ± 5. 5) %,respectively,with optimal TS concentration of 8%.
The influence of ozone addition and TS concentration on anaerobic wet digestion using ozone-treatment municipal sludge as substrate and anaerobic digestion sludge as inoculum by batch tests. Methane production,SCOD removal rate and VSS removal rate increased with improved ozone addition in the range of 0. 01 g·g~(-1) TS ～ 0. 06 g·g~(-1) TS. Considering operation economy,the optimum operation condition of 0. 05 g·g~(-1) TS of ozone addition was determined and methane production,SCOD removal rate and VSS removal rate was determined to be( 323 ± 2. 1) mL,86. 7% and( 65. 5 ± 0. 9) %,respectively,at this condition. Compared with control group,methane production,SCOD removal rate and VSS removal rate was improved by 100. 6%,86. 7% and 59%,respectively. With TS concentration from 2% to 8%,methane production increased with improved TS concentration,in contrast,SCOD removal rate and VSS removal rate showed slight variation. Methane production,SCOD removal rate and VSS removal rate was determined to be( 618 ± 5. 3) mL,( 86.5 ± 3. 9) % and( 68. 8 ± 5. 5) %,respectively,with optimal TS concentration of 8%.
引文
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[2]杨文焕,唐若凯,肖作义,等.多级MBBR与A2O工艺处理低C/N生活污水对比分析[J].环境科学与技术,2017,40(9):131-135.
[3]许泽宏,周明罗,程晓丹,等.矿化垃圾对污泥厌氧消化产甲烷的影响[J].环境工程学报,2017,11(6):3780-3784.
[4]刘阳,彭永臻,韩玉伟,等.游离氨对热水解联合中温厌氧消化处理剩余污泥的影响[J].中国环境科学,2015,35(9):2650-2657.
[5]韩文彪,王毅琪,徐霞,等.剩余污泥和粪便厌氧消化产气潜能研究[J].中国沼气,2017,35(1):49-52.
[6]陈青,周顺桂,袁勇,等.外阻对污泥微生物燃料电池产电以及有机物降解的影响[J].生态环境学报,2011,20(5):946-950.
[7]郭思宇,彭永臻,李夕耀,等.热处理对剩余污泥中温厌氧消化的影响[J].中国环境科学,2017,27(6):2106-2113.
[8]KIM J,YU Y,LEE C.Thermo-alkaline pretreatment of waste activated sludge at low-temperatures:effects on sludge disintegration,methane production,and methanogen community structure[J].Bioresource Technology,2013,144(12):194-201.
[9]张万钦,戚丹丹,吴树彪,等.不同预处理方式对污泥厌氧发酵的影响[J].农业机械学报,2014,45(9):187-198.
[10]国家环境保护总局.水与废水检测分析方法[M].北京:中国环境科学出版社,2002.
[11]CHU C Y,WANG Z F.Dairy cow solid waste hydrolysis and hydrogen/methane productions by anaerobic digestion technology[J].International Journal of Hydrogen Energy,2017,42:30591-30598.
[12]DAREIOTI M A,KORNAROS M.Anaerobic mesophilic codigestion of ensiled sorghum,cheese whey and liquid cow manure in a two-stage CSTR system:Effect of hydraulic retention time[J].Bioresource Technology,2015,175:553-562.
[13]HAGELQVIST A.Batchwise mesophilic anaerobic co-digestion of secondary sludge from pulp and paper industry and municipal sewage sludge[J].Waste Management,2013,33:820-824.
[14]韩文彪,王毅琪,徐霞,等.剩余污泥和粪便厌氧消化产气潜能研究[J].中国沼气,2016,35(1):49-52.
[15]李雪,林聪,沙东军,等.不同生物预处理方式对污泥厌氧消化过程性能的影响[J].农业机械学报,2015,46(8):186-191.