摘要
采用自制的上流式厌氧污泥床(UASB)反应器研究种泥热预处理对培养产氢颗粒污泥的影响。2组反应器分别以原始污泥和经热预处理污泥作为种泥,在进水COD浓度为4000mg/L,温度为37℃,出水pH为4.6～5.0的条件下,逐渐将HRT由24h降低到7h,2组反应器都在HRT为8～7h时成功培养出成熟的颗粒污泥。此时,有机负荷为45kg(COD)/(m3·d),接种原始污泥组产气量为41L/d,氢气含量为52%,COD去除率为23%,总挥发酸为1380mg/L;而接种经热预处理污泥组的有机负荷为57kg(COD)/(m3·d),产气量为44.5L/d,氢气含量为47.5%,COD去除率为12%,总挥发酸为1086mg/L。研究结果表明,种泥热预处理对产氢颗粒污泥的形成和稳定性有显著影响,虽然在形成颗粒污泥的过程中反应器稳定性较差,污泥易上浮,但颗粒形成后运行稳定,能适应更短的HRT,同时氢气产量也更高。
The effects of heat pretreatment in cultured hydrogen-producing granular sludge was studied in upflow anaerobic sludge bed（UASB） reactor.Using a kind of mud and the thermal pretreatment of sludge as seeds,and under the conditions of the influent COD concentration 4 000 mg/L,the temperature 37 ℃,the effluent pH 4.6 ~ 5.0,HRT decreased from 24 h to 7 h,both reactor successfully cultivated mature granular sludge at HRT 8 ~ 7 h.At this time,the organic load of the original sludge inoculation group is 45 kg（COD）/（m3· d）,gas production is 41 L/d,hydrogen content is 52%,COD removal rate is 23%,total volatile acids is 1 380 mg/L,the organic load of the heat pretreatment group is 57 kg（COD）/（m3· d）,gas production is 44.5 L/d,hydrogen content is 47.5%,COD removal rate is 12%,total volatile acids is 1 086 mg/L.The results showed that,the thermal pretreatment has a significant effect on the formation and stability of hydrogen-producing granular sludge,while in the process of the granular sludge formation,it’s poor stability and easy to float,but after start-up,the running state is more stable,can adapt to a shorter HRT and got higher hydrogen yield.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2013年第4期171-175,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家自然科学基金资助项目(51108285)
国家"863"计划资助项目(2011AA060905)
