VTBR技术处理纤维素乙醇生产废水中试研究  

Pilot-scale study on treatment of cellulosic ethanol production wastewater by VTBR technology

作　　者：王东洲 冀秋燕 张瑛[2] 周集体[2] WANG Dongzhou;JI Qiuyan;ZHANG Ying;ZHOU Jiti(Dalian Environmental Engineering Design&Research Institute Co.,Ltd.,Dalian University of Technology(EEI,DUT),Dalian 116085,China;School of Environmental Science and Technology,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工环境工程设计研究院有限公司,辽宁大连116085 [2]大连理工大学环境学院,辽宁大连116024

出　　处：《工业水处理》2023年第6期125-129,共5页Industrial Water Treatment

摘　　要：针对纤维素乙醇生产废水,采用新型垂直折流生物处理反应器(VTBR)开展中试试验研究,对系统稳定运行过程中COD、氨氮、SO_(4)^(2-)、沼气产量等指标进行了考察分析。结果表明,VTBR技术可用于对高有机物、高氨氮、高硫酸盐特征的纤维素乙醇生产废水的处理,且处理效果稳定可靠,装置最终出水COD稳定在(2 617.9±442.7) mg/L,氨氮稳定在(75.7±21.4) mg/L,SO_(4)^(2-)稳定在(1 639.6±139.2) mg/L;中试装置COD、氨氮和SO_(4)^(2-)平均去除率分别达到(95.2±1.4)%、(83.1±4.9)%和(62.5±2.9)%;厌氧平均COD容积负荷为(3.5±0.6) kg/(m^(3)·d),好氧平均COD容积负荷为(1.0±0.5) kg/(m^(3)·d),好氧硝化作用平均NH_(4)^(+)-N容积负荷为(0.27±0.05) kg/(m^(3)·d);厌氧系统单位COD平均沼气产率为(0.50±0.08) m^(3)/kg;VTBR生物处理流程各工艺段B/C逐渐降低,好氧出水B/C小于0.15,且污染物为较难生物降解组分。中试结果同时表明,针对纤维素乙醇生产废水,若要满足达标排放的要求,仅靠生化处理较难实现,需进一步组合合理的深度处理技术。Vertical tubular biological reactor(VTBR)as a novel biological treatment technique,was set-up in pilot-scale to treat the cellulosic ethanol production wastewater.To evaluate the performance of equipment,some indexes such as COD,NH_(3)-N,SO_(4)^(2-)and biogas output were analyzed.The results showed that VTBR could be used to treat cellulosic ethanol production wastewater with high concentration of COD,NH_(3)-N and SO_(4)^(2-),and the performances were stable and reliable.The COD,NH_(4)^(+)-N and SO_(4)^(2-)of the effluent were(2617.9±442.7)mg/L,(75.7±21.4)mg/L,and(1639.6±139.2)mg/L.The average removal rate of COD,NH_(3)-N and SO_(4)^(2-)were(95.2±1.4)%,(83.1±4.9)%and(62.5±2.9)%,respectively.The average COD volume load of anaerobic was(3.5±0.6)kg/(m^(3)·d)and that of aerobic was(1.0±0.5)kg/(m^(3)·d).The average NH_(4)^(+)-N volume load of aerobic nitrification was(0.27±0.05)kg/(m^(3)·d).The average biogas output of per unit COD of the anaerobic system was(0.50±0.08)m^(3)/kg.B/C of each reactor effluent was decline gradually,and the last effluent B/C was 0.15,the residual contaminants were difficult to biodegrade.The results also showed that biological treatment could not achieve the emission standard and needed combining advanced treatment technique in cellulosic ethanol production wastewater treatment.

关 键 词：纤维素乙醇生产废水 垂直折流生化处理技术 容积负荷 沼气产率 

分 类 号：X703[环境科学与工程—环境工程]