餐厨垃圾SBMR_ASBR两相厌氧消化产气性能研究_钟起隆

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收稿日期:2012-03-31。

基金项目:国家高技术研究发展“863”计划(2008AA062401,2008AA062402);中美国际合作项目(2011DFA90800)。

作者简介:钟起隆(1988-),男,江西赣州人,硕士研究生,主要从事城市固体废物厌氧消化技术的研究。E-mail :zhongqilong00@ 通讯作者:

袁海荣(1975-),女,北京延庆县人,副教授,硕士生导师,主要从事固体废物资源化综合利用等方面的研究工作。E-mail :331290105@

餐厨垃圾SBMR-ASBR 两相厌氧消化产气性能研究

钟起隆1,李秀金1,李

兵2,邹德勋1,朱保宁1,袁海荣1

(1.北京化工大学资源与环境研究中心,北京100029;2.轻工业环境保护研究所,北京

100089)

要:以学校食堂餐厨垃圾为原料,考察餐厨垃圾在SBMR-ASBR 反应器中产酸和产甲烷性能。结果表明:

高负荷下启动酸化相有利于系统快速形成稳定的乙醇型发酵,且可以避开丙酸型发酵,在10g/(L ·d )负荷(以

VS 计)下,稳定状态产酸率平均达到55000mg/L ,VFA 中乙醇和乙酸分别平均稳定在27000mg/L 和23000mg/L ,两者共占总VFA 的91%;甲烷相可以稳定运行的最高负荷为5g/(L ·d )(以VS 计),此时,系统整体处理

能力为3.3g/(L ·d ),单位容积产气率达到2.3L/(L ·d ),甲烷含量在65%~70%,TS ,VS 去除率分别达到77%,

83%。在实际工程中可以高负荷启动酸化相,有利于系统形成稳定的乙醇型发酵和高负荷运行的甲烷相。

关键词:餐厨垃圾;厌氧消化;两相;酸化;甲烷化中图分类号:TK6;S216.4

文献标志码:A

文章编号:1671-5292(2012)10-0047-05

Performances of two-phase SBMR-ASBR anaerobic digestion

for biogas production of kitchen waste

ZHONG Qi-long 1,LI Xiu-jin 1,LI Bing 2,ZOU De-xun 1,ZHU Bao-ning 1,YUAN Hai-rong 1

(1.Center for Resources and Environmental Research ,Beijing University of Chemical Technology ,Beijing 100029,

China ;2.Environmental Protection Research Institute of Light Industry ,Beijing 100089,China )

Abstract :The performances of two-phase SBMR-ASBR anaerobic digestion for biogas production of kitchen waste was investigated.To find out the acid production performances of acidification phase and the methane production performance of methanogenic phase,kitchen waste from campus restaurant was used as feedstock.The results showed that the acidification phase of kitchen waste entered into a stable ethanol-type fermentation rapidly and avoid the propionate-type fermentation

at a high OLR.The acid yield was 55000mg/L with 10g/(L ·

d )of OLR at th

e stable state.Ethanol and acetic acid were 27000mg/L and 23000mg/L in VFA,respectively.Ethanol and acetic acid

were 91%of VFA.The stable OLR of the methanation phase was 5g/(L ·d )in this condition.The

OLR of the system was 3.3g/(L ·d ).The volume gas production rate arrived at 2.3L/(L ·d).Methane

content was 65%~70%.Removal rate of TS and VS reached 77%and 83%,respectively.It is suggested that the acidification be started at a high OLR,and this is beneficial to the system to build a stable ethanol-type fermentation and a methane phase running at a high OLR.The acidification phase running at high OLR would be recommended in facility of municipal organic solid waste.Key words :kitchen waste ;anaerobic digestion ;two-phases ;acidification ;methanation 0

引言

餐厨垃圾俗称潲水、也称泔脚,是指居民日常生活中所产生的食物残余,其成分主要是纤维素、

淀粉、蛋白质、脂肪和水[1]。随着经济的发展、城市规模的迅速扩大和城市人口的快速增加,城市餐厨垃圾的产生量越来越大,例如,仅北京市2011

可再生能源

Renewable Energy Resources

第30卷第10期2012年10月

Vol.30No.10Oct.2012

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