预处理污泥发酵液直接用于微生物电解池产氢研究  

Hydrogen production from pretreated sludge fermentation liquid in microbial electrolysis cell

作　　者：曹麒 鄢胜韩 庄廷烽 郑思颖 刘常青[3] 曾艺芳 郑育毅[1,2] 甄广印 CAO Qi;YAN Shenghan;ZHUANG Tingfeng;ZHENG Siying;LIU Changqing;ZENG Yifang;ZHENG Yuyi;ZHEN Guangyin(Fujian Key Laboratory of Pollution Control and Resource Reuse,College of Environmental and Resource Sciences and College of Carbon NeutralModern Industry,Fujian Normal University,Fuzhou 350007;Fujian College and University Engineering Research Center for Municipal(Solid)Waste Resourceization and Management,Fuzhou 350007;School of Geographical Sciences and School of Carbon Neutrality Future Technology,Fujian Normal University,Fuzhou 350007;Fujian Minhuan Test and Detection Co.,Ltd,Fuzhou 350012;School of Ecological and Environmental Science,East China Normal University,Shanghai 200241)

机构地区：[1]福建师范大学,环境与资源学院、碳中和现代产业学院,福建省污染控制与资源循环利用重点实验室,福州350007 [2]城市废物资源化技术与管理福建省高校工程研究中心,福州350007 [3]福建师范大学,地理科学学院、碳中和未来技术学院,福州350007 [4]福建省闽环试验检测有限公司,福州350012 [5]华东师范大学,生态与环境科学学院,上海200241

出　　处：《环境科学学报》2023年第3期234-243,共10页Acta Scientiae Circumstantiae

基　　金：福建省科技厅对外合作项目(No.2021I0010);福建省科技厅计划项目(No.2020N5015);福建省科技厅公益类项目(No.2019R1015-1)。

摘　　要：预处理污泥发酵液(SFL)直接用于微生物电解池(MEC)产氢,相较于预处理发酵液上清液MEC产氢,可更好地实现污泥资源化利用.通过批式循环试验,将分别经pH=3、pH=10和70℃预处理后的SFL进行MEC产氢.结果表明,70℃和pH=10有效预处理的产氢速率分别为0.36 m^(3)·m^(-3)·d^(-1)和0.34 m^(3)·m^(-3)·d^(-1).挥发性脂肪酸总量(TVFA)利用量最高,分别约为未处理组的1.99倍和1.60倍,其中,乙酸利用量占比最大;而后依次是可溶性蛋白质与可溶性碳水化合物.70℃组和pH=10组SFL更适合作为MEC底物,其峰值电流相对较高、电流持续时间相对较长.70℃组阴极氢气损失得到有效控制,阴极氢回收率达到59%;pH=10组由于体系中较多的OH-和钠盐影响,阴极氢回收率较低.MEC可加速SFL水解过程,由于SCOD不断溶出,其利用率相对较低.Substrate directly from pretreated sludge fermentation liquid(SFL)was used for hydrogen production.This could fully utilize the resource compared to that from supernatant of pretreated SFL in microbial electrolysis cell(MEC).In this paper,SFL pretreated at pH=3,pH=10 and 70℃was directly used for MEC hydrogen production through batch cycle reaction.The schedules of 70℃and pH10 were effectively pretreated methods with hydrogen production rates of 0.36 m^(3)·m^(-3)·d^(-1) and 0.34 m^(3)·m^(-3)·d^(-1) respectively.The removal rates of total volatile fatty acids(TVFA)were 1.99 times and 1.60 times of the control group with the acetic acid accounted the best.Meanwhile,the removal of soluble protein was more efficient than soluble carbohydrate,but less than TVFA.The SFLs in 70℃and pH=10 were more suitable for MEC anode.They achieved relatively high peak current and long current duration.The cathodic hydrogen recovery rate reached 59%in 70℃group.The cathodic hydrogen loss was effectively controlled.The cathodic hydrogen recovery rate was low in pH=10 group due to the negative influence of excessive OH-and sodium salts.MEC can accelerate the SFL hydrolysis process.However,its removal rate was relatively low due to the continuous dissolution of SCOD.

关 键 词：污泥发酵液(SFL) 氢气 微生物电解池(MEC) 预处理 

分 类 号：X705[环境科学与工程—环境工程]