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NaOH处理对互花米草高温干式厌氧发酵的影响
引用本文:陈广银,郑正,常志州,叶小梅,罗艳.NaOH处理对互花米草高温干式厌氧发酵的影响[J].环境科学,2011,32(7):2158-2163.
作者姓名:陈广银  郑正  常志州  叶小梅  罗艳
作者单位:1. 江苏省农业科学院农业资源与环境研究所,江苏省农业废弃物资源化工程技术研究中心,南京210014 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093
2. 复旦大学环境科学与工程系,上海,200433
3. 江苏省农业科学院农业资源与环境研究所,江苏省农业废弃物资源化工程技术研究中心,南京210014
4. 南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093
基金项目:国家水体污染控制与治理科技重大专项(2008ZX07101-004);农业部行业计划项目(200903011-01)
摘    要:为了解NaOH处理对互花米草厌氧发酵的影响,在高温(55℃±1℃)和互花米草初始干物质含量为20%条件下,考察了NaOH处理对互花米草厌氧发酵产气特性、物质结构和组成以及发酵后互花米草水浸提液理化特性的影响.结果表明,互花米草经5%NaOH处理后,产气受到明显的抑制,累积产气量仅为CK的76.68%;碱处理配合水洗可有...

关 键 词:碱处理  互花米草  高温干式发酵  沼气  抑制作用
收稿时间:2010/8/16 0:00:00
修稿时间:2010/9/20 0:00:00

Effect of NaOH-treatment on Dry-thermophilic Anaerobic Digestion of Spartina alterniflora
CHEN Guang-yin,ZHENG Zheng,CHANG Zhi-zhou,YE Xiao-mei and LUO Yan.Effect of NaOH-treatment on Dry-thermophilic Anaerobic Digestion of Spartina alterniflora[J].Chinese Journal of Environmental Science,2011,32(7):2158-2163.
Authors:CHEN Guang-yin  ZHENG Zheng  CHANG Zhi-zhou  YE Xiao-mei and LUO Yan
Institution:Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China. chengy522@gmail.com
Abstract:In order to improve the biotransformation rate of lignocellulosic materials, sodium hydroxide (NaOH) was widely used to pretreat lignocellulosic materials. Effect of NaOH-treatment on dry-thermophilic anaerobic digestion of Spartina alternflora was studied by batch model under the temperature of 55 degrees C +/- 1 degrees C, at the initial total solid loading (TSL) of 20%. The results indicated that biogas production was inhibited by NaOH-treatment and improved by NaOH-treatment with water washed. The cumulative biogas yield of control (CK), NaOH-treated and NaOH-treated with water washed (NaOH + water) were 268.35 mL/g, 205.76 mL/g and 299.97 mL/g, respectively. The methane content of CK and NaOH + water treatments kept stable while fluctuation of NaOH-treated treatment during anaerobic digestion process was observed. Compared with CK and NaOH + water treatments, methane content of NaOH-treated treatment was improved by 5.30%. The content of hemi-cellulose and cellulose of S. alternifora decreased while content of lignin of S. alterniflora increased after 51-day anaerobic digestion. The crystallinity of cellulose of S. alterniflora increased after NaOH-treatment which was consistent to the result of FTIR. The lignocellulosic structure was destroyed and the biodegradability of S. alterniflora was increased by NaOH pretreatment. However, the amount of Na+ was taken into the anaerobic system, besides the high Na+ content in the plant itself which inhibited the anaerobic microorganisms. Therefore, NaOH-treatment is considered to be unsuitable for the anaerobic digestion of S. alterniflora.
Keywords:NaOH-treatment  Spartina alterniflora  dry-thermophilic anaerobic digestion  biogas  inhibition
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