摘要
在中温（35±2℃）条件下,利用外循环式UASB反应器处理中高有机浓度的槟榔加工废水,并着重探讨了水力停留时间（HRT）对厌氧消化的影响。研究表明,当反应器稳定运行,水力停留时间为1 d,进水COD浓度5 000 mg/L左右,容积负荷在2.53-5.25 kg COD/（m3·d）时,COD去除率在38%以上,出水COD〈3 000 mg/L,平均产气率为0.41 m3/kg COD;若水力停留时间延长至4 d,容积负荷为1.26-1.30 kg COD/（m3·d）,COD去除率可以达到79%,出水COD〈1 200 mg/L,出水可生化性下降,BOD5/COD平均为0.28,实验取得了良好的处理效果,为利用厌氧技术处理槟榔加工废水提供了设计依据。
The improved upflow anaerobic sludge blanket（UASB） was used for the treatment of areca wastewater under mesophilic conditions of（30 ± 2）℃,the effects of hydraulic retention time（HRT） on anaerobic digestion were emphatically discussed.When the reactor was stable with HRT of one day and the influent COD concentration of 5 000 mg / L,the volume loading rate of 2.53 - 5.25 kg COD /（m3·d） in UASB reactor was achieved,COD removal rate was over 38%,effluent COD concentration was below 3 000 mg / L,and the average yield of methane was 0.41 m3/ kg COD.When HRT extended to four days,the volume loading rate was 1.26 - 1.30 kg COD /（m3·d）,the COD removal rate could reach over 79%,the effluent COD concentration would below 1 200 mg / L,the biodegradability of the effluent declined,the BOD 5 / COD ratio was 0.28 on average.This sound experimental result provides a reliable basis for purifying the areca wastewater under the anaerobic condition.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第9期3385-3389,共5页
Chinese Journal of Environmental Engineering
基金
国家"水体污染控制与治理"重大专项(2008ZX07211-001)
关键词
外循环式UASB反应器
槟榔废水
容积负荷
可生化性
产气率
outside circulation UASB reacor
areca wastewater
volume loading rate
biodegradability
gas production rate
