摘要
厌氧消化特别适合处理含有高有机质的污泥。通过对墨尔本一个猪肉加工场的气浮污泥进行收集后,本实验探究了厌氧消化的沼气生成量以及不同温度对沼气生成量的影响,得出了沼气中甲烷(CH4)平均含量在60%以上;II相污泥厌氧消化产生的沼气累积量明显高于I相等的结论。沼气累积产量在先进行3天高温(55℃)后转移至中温(35℃)进行余下11天的II相厌氧发酵条件下达到最大值333 ml。墨尔本的东污水处理厂(Eastern Treatment Plant)在对生活污水应用生物处理法之后再对污泥进行厌氧发酵,每天产生沼气量约为40 000 m3且其发电量可供给40%的自身用电需求,真正达到污泥的减量化、无害化和资源化的利用,为中国污水处理厂大量污泥的积累问题提供了一条可行的解决途径。
Anaerobic Digestion is suitable for treating sludge which has high organic loading. After collecting the DAF （Dissolved Air Flotation） sludge from a meat industry in Melbourne, this study has investigated the bio-gas production from anaerobic digestion and the effect of temperature on the bio-gas production; furthermore, it has been found that the average Methane content（CH4 %） in the bio-gas is more than 60 % and II Phase Anaerobic Digestion bio-gas production is significantly larger than I Phase. The peak bio-gas production is about 333 ml which appears under the II Phase condition （first 3 days in the Thermophilic situation following by the rest 11 days in the Mesophilic situation）.The Eastern Treatment Plant in Melbourne employs biological treatment method to treat the domestic wastewater and then uses the anaerobic digestion to manage sludge, the daily bio-gas production is approximate 40 000m^3 and this amount can supply around 40 % of on-site electricity demand after power generation. The Anaerobic Digestion has the advantages of volume reduction, environmental friendly and resource recovery which is a feasible solution for the problem of treating large sludge accumulation in wastewater treatment plants in China.
出处
《能源环境保护》
2016年第3期10-15,共6页
Energy Environmental Protection
关键词
厌氧消化
污泥处理工艺
沼气
CH4
Anaerobic Digestion
Sludge Management
Bio-gas
Methane
