纳米零价铁协同硫酸盐对低浓度低有机质剩余污泥水解酸化性能的影响  

Effect of nanoscale zero-valent iron cooperating with sulphate on hydrolytic acidification performance of excess sludge with low concentration and low organic matter

作　　者：金宝丹 李霞 覃贺鲜 王冉 王兰 赵建国 钮劲涛 JIN Baodan;LI Xia;QIN Hexian;WANG Ran;WANG Lan;ZHAO Jianguo;NIU Jintao(College of Material and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450001,China;Department of Resources and Environment,Huaxin College of Hebei GEO University,Shijiazhuang 050700,China;He′nan Heng′an Environmental Protection Technology Co.,Ltd.,Zhengzhou 450001,China)

机构地区：[1]郑州轻工业大学材料与化学工程学院,河南郑州450001 [2]河北地质大学华信学院资源与环境系,河北石家庄050700 [3]河南恒安环保科技有限公司,河南郑州450001

出　　处：《轻工学报》2022年第1期110-117,共8页Journal of Light Industry

基　　金：国家自然科学基金项目(42007340)。

摘　　要：将低质量浓度低有机质剩余污泥在不同条件(自然条件、纳米零价铁(nZVI)、单过硫酸氢钾(PMS)、K _(2)SO_(4)、nZVI+PMS、nZVI+K_(2)SO_(4))下进行发酵处理,通过分析发酵过程中溶解性蛋白质、多糖和挥发性脂肪酸(SCFAs)质量浓度、生物酶活性等指标,研究nZVI对污泥在不同硫酸盐条件下水解酸化性能的影响。结果表明,nZVI+PMS发酵系统水解酸化性能最强,蛋白质、多糖和SCFAs的质量浓度(以化学需氧量(COD)计)分别为255.07 mg/L、138.31 mg/L和356.8 mg/L;nZVI+PMS发酵系统蛋白酶和α-葡萄糖苷酶活性最强,但是nZVI发酵系统碱性磷酸酶和酸性磷酸酶活性最高,而K_(2)SO_(4)发酵系统生物酶活性与自然系统相似,可见nZVI能够有效提高PMS作用下的低浓度低有机质剩余污泥厌氧发酵性能。The waste activated sludge with low concentration and low organic matter was fermented under different conditions including natural,nanoscale zero-valent iron(nZVI),2KHSO_(5)·KHSO_(4)·K_(2)SO_(4)(PMS),K_(2)SO_(4),nZVI+PMS and nZVI+K_(2)SO_(4).The soluble protein,polysaccharide,short volatile fatty acids(SCFAs)and biological enzyme were analyzed during the fermentation process,and the effects of nZVI on hydrolytic acidification performance of the excess sludge were studied.The results showed that hydrolytic acidification performance of the nZVI+PMS fermentation system was optimal,and the mass concentration of protein,polysaccharide and SCFAs was 255.07 mg/L,138.31 mg/L and 356.8 mg/L respectively.The maximal activity of protease andα-glucosidase appeared in the nZVI+PMS fermentation system,however the maximal activity of alkaline phosphatase and acid phosphatase appeared in the nZVI fermentation system.In addition,the bioenzyme activity of the K_(2)SO_(4) fermentation system was similar to that of natural fermentation system.These results indicated that nZVI could improve effectively the fermentation performance of the waste activated sludge with low concentration and low organic matter under PMS condition.

关 键 词：厌氧发酵 纳米零价铁 硫酸盐 水解酸化 生物酶活性 

分 类 号：X703[环境科学与工程—环境工程]