灰色关联分析在有机垃圾高固体厌氧消化工艺中应用  

APPLICATION OF GREY RELATIONAL ANALYSIS TO HIGH SOLID ANAEROBIC DIGESTION EXPERIMENT ON ORGANIC WASTES

作　　者：冯磊[1] 李润东[1] Bernhard Raninger 李延吉[1] 

机构地区：[1]沈阳航空工业学院辽宁省清洁能源重点实验室,沈阳110136

出　　处：《环境工程》2009年第S1期476-479,共4页Environmental Engineering

基　　金：教育部新世纪优秀人才支持计划(NCET-07-0564);辽宁省高校优秀人才计划项目(2006R41)

摘　　要：在中温(37℃)条件下,应用连续式单级高固体厌氧消化技术对有机垃圾进行了实验室规模的处理,并应用灰色关联分析优化有机垃圾厌氧消化工艺。结果表明:1)在为期479d的生物有机垃圾厌氧消化过程中,除阶段9外,其他8个阶段的容积产气率随TS浓度增加而稳定升高。2)1～6阶段初期,产气量、pH出现波动,随着机垃圾投放量的增加,波动的持续时间由第1阶段的7d,第二阶段缩短为5d,3～6阶段只有1～3d;而阶段7、8,未出现由于垃圾投放量增加而导致的波动期;阶段9在总反应进行到第448天前,产气效果良好,从第449天起产气明显减少,消化液的pH值降低到5.8左右,氨氮浓度3770mg/L。3)由灰色关联分析评估,有机垃圾高固体厌氧消化过程的优化工况为:进料负荷为10.64g/(L.d),TS质量分数为17.4%,pH值控制在7.12～7.33,HRT为14d。Under mesophilic condition(37℃),a bench-scale experiment based on high solid anaerobic digestion process was conducted in a fed-batch single phase reactor and there was a optimization on high solid anaerobic digestion technology by gray relational analysis.The result shows:1)Except phase 9,there was a steady gas yield in other 8 phases during the 479 d organic waste anaerobic digestion:the volume gas yield was higher with TS increasing.2)There was a fluctuation of gas production and pH during phase 1 to 6 and the fluctuation time was shorten from 7days in phase1,5 d in phase 2 to 1 or 3 d in phase 3~6 with the TS increasing;there was no fluctuation during phase 7 and 8;there was lower gas production in phase 9 and the pH value and ammonia concentration was 5.8 and 3 770 mg/L.3)Through gray relational analysis,the optimization on high solid anaerobic digestion technology was evaluated:the feed load of organic waste was 10.64 g/(L·d),TS was 17.4 %,pH was controlled in 7.12~7.33,HRT was 14d.

关 键 词：有机垃圾 高固体 厌氧消化 灰色关联分析 

分 类 号：X705[环境科学与工程—环境工程]