生物炭过滤对沼液超滤膜分离的膜污染减缓效应  

Membrane Fouling Mitigation Effect of Biochar Filtration on Biogas Slurry Ultrafiltration Membrane Separation

作　　者：周珊[1] 郑展望 宋成芳[1] 余兵 ZHOU Shan;ZHENG Zhanwang;SONG Chengfang;YU Bing(College of Environment and Resources,Zhejiang A&F University,Hangzhou 311300,China)

机构地区：[1]浙江农林大学环境与资源学院,碳中和学院,浙江杭州311300

出　　处：《水处理技术》2025年第1期40-46,共7页Technology of Water Treatment

基　　金：浙江省科技厅重点研发计划(2020C01017)。

摘　　要：采用猪粪生物炭过滤进行预处理,考察了猪粪生物炭过滤对沼液超滤时膜通量的影响,同时监测分析其对透过液的基本水质指标、超滤污染膜的表面微观形态和膜污染物组成的影响。结果显示预处理组比对照组的膜通量提高了12%,猪粪炭过滤可去除21.64%的悬浮物,生物炭和超滤膜联合使用,膜透过液中的悬浮物、化学需氧量、氨氮、全氮、全磷、总有机碳的去除率均有所提高,分别为28.49%、17.71%、18.26%、24.97%、13.53%,悬浮物浓度为62.76 mg/L。扫描电镜图显示污染膜表面的污垢粗糙松散,而对照组的污染膜表面滤饼层更密实。对照组污染膜清洗液中UV254的值和TOC浓度均大于预处理组污染膜,无机离子浓度也大于预处理组污染膜清洗液。研究结果说明由于猪粪生物炭过滤预处理吸附截留了沼液中的污染物和生物炭颗粒对膜污染物结构组成的影响作用,有效的减缓了沼液超滤膜分离过程中的膜污染发生。In this paper,pig manure biochar filtration was used for pretreatment,and the effect of pig manure biochar filtration on membrane flux during biogas ultrafiltration was investigated.At the same time,its effects on the basic water quality index of the permeate,the surface morphology of the ultrafiltration membrane and the composition of membrane pollutants were monitored and analyzed.The results indicate that the membrane flux of the biological pretreatment group is 12%higher than that of the control group.Pig manure charcoal filtration lead to the removal of 21.64%of suspended solids.When pig manure charcoal and ultrafiltration membranes are combined,removal rates of suspended solids,COD,ammonia nitrogen,total nitrogen,total phosphorus,and total organic carbon in the membrane permeate are enhanced,with values of 28.49%,17.71%,18.26%,24.97%,13.53%,and a suspended solids concentration of 62.76 mg/L.The scanning electron microscope shows that the dirt on the surface of the fouling membrane is rough and loose,while the filter cake layer on the surface of the fouling membrane in the control group is denser.The UV254 value and TOC concentration of the fouled membrane cleaning solution in the control group are higher than those in the biochar pretreatment group,and the inorganic ion concentration in the control group is also higher than that in the pretreatment group.The results show that the pretreatment of pig manure biochar adsorption intercepts the pollutants in biogas slurry and the effect of biochar particles on the structure and composition of membrane pollutants,which effectively slows down the occurrence of membrane fouling in the process of biogas slurry ultrafiltration membrane separation.

关 键 词：沼液 猪粪炭 超滤膜 膜通量 膜污染 

分 类 号：TQ028.8[化学工程]