碱(水)热处理改善分选有机废物的厌氧消化性能  

Anaerobic Digestibility Enhancement of Sorted Organic Waste by Alkaline Hydrothermal Pretreatment

作　　者：王昊[1] 王洪涛[1] 陆文静[1] 谭琦璐[1] 祝捷[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境科学》2008年第10期2820-2823,共4页Environmental Science

基　　金：清华大学基础研究基金项目(Jc2003010)

摘　　要：取用凋落杨树叶和自配厨余废物,分别进行水热(碱)预处理后测定生物化学甲烷势(BMP),研究碱热处理对废物厌氧消化性能的影响.水热处理后产物pH降低,有机物加速溶解并进一步水解生成小分子物质.对于不同废物,实验得到的最佳水热条件不同.杨树落叶在水热温度150℃、碱性环境处理后观察到厌氧甲烷势,水解液SCOD浓度13203mg/L.水热温度超过130℃时厨余废物完全溶解或悬浮,SCOD浓度12412mg/L,加碱催化对产沼性能影响不大.此时两者最大比累计甲烷产量分别为112mL/g和276mL/g.总碳转化率分别为24.81%和53.34%.Biochemical methane potential （BMP） of fallen leaf and model kitchen garbage were tested after alkaline hydrothermal pretreatment to investigate the effects of thermal-chemical treatment on the digestibility of waste, pH of hydrolysate decreased after pretreatment, and organics were solubilized acceleratedly and hydrolyzed into low molecular products. Different optimum hydrothermal conditions were obtained for different waste. The BMP of leaf was observed when hydrothermal temperature was above 150℃ under alkaline condition, and SCOD concentration was 13 203 mg/L. Kitchen garbage was completely liquidized and suspended at 130℃ and SCOD concentration was 12 412 mg/L, and addition of alkali show unobvious influence on methane production. Maximum specific methane yield were 112 mL/g VS and 276 mL/g respectively. The conversion rates on the basis of total carbon were 24.81% and 53.34%.

关 键 词：庭院废物 厨余废物 水热反应 碱热水解 厌氧消化 生化甲烷势 

分 类 号：X705[环境科学与工程—环境工程]