处理易降解有机物UASB反应器的抗负荷冲击能力

The Anti-shock loading capability of UASB reactor for treatment of easily biodegradable organic compounds

以处理易降解有机物的UASB反应器为对象,以化学需氧量(COD)、三氯甲烷、2,4-二硝基酚和碱度为主要冲击负荷,研究了单负荷、双负荷和多负荷冲击下UASB反应器主要性能参数的变化规律.研究结果表明,UASB受到负荷冲击时,出水COD和挥发性脂肪酸(VFA)的浓度会增加,而CH4体积分数则会降低;容积产气率在COD负荷冲击时会增加,在其他负荷冲击时则会减少.研究还表明,多负荷冲击反应器时,影响VFA因素的主次顺序分别为三氯甲烷、COD、二氯硝基酚和碱度;影响容积产气率和CH4体积分数因素的主次顺序分别为三氯甲烷、二氯硝基酚、COD和碱度.

The COD, chloroform, 2, 4-dinitrophonel and alkalinity were selected as shock load. The performance change of UASB reactor was studied under single load shock, double load shock and multiload shock, respectively. The results show that under load shock, the effluent COD and VFA of UASB reactor would increase, the CH4 volume fraction would decrease, and the volume gas production would increase under COD shock, otherwise it would decrease under the other load shock. The results also suggest that when the UASB reactor was shocked by the multi-loading, the influencing priority of factors for the effluent VFA were described as chloroform 〉 COD 〉 dinitrophenol 〉 alkalinity, the influencing priority of factors for the volume gas production and CH4 volume fraction were described as chloroform 〉 dinitrophenol 〉 COD 〉 alkalinity.