电极-SBBR对集中型沼液的脱氮除铜研究  

Synchronous removal of nitrogen and copper from biogas slurry by electrode-SBBR

作　　者：陈玉成[1] 杨志敏[1] 郭玲[2] 刘静 马焕春[1] 

机构地区：[1]西南大学三峡库区生态环境教育部重点实验室西南大学资源环境学院,重庆400716 [2]山西农业大学信息学院,山西030800 [3]四川晨泰工程管理咨询有限公司,四川610041

出　　处：《农业工程学报》2012年第3期215-219,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"十一五"科技支撑计划项目(2010BAD03B03);重庆市科技攻关重点项目(CSTC2009AB7027)

摘　　要：为了处理集中型沼液中过高的氨氮和由饲料添加剂带入的铜,将电极生物膜法与序批式生物膜反应器(SBBR)工艺的优势进行互补,构建电极-SBBR耦合新工艺,以同时去除氮与铜。通过实验室配水与沼液试验,探讨了电极-SBBR体系同步脱氮除铜的工艺参数及其效果。结果表明,集中型沼液电极-SBBR体系的操作工序为:进水→厌氧→曝气→缺氧/厌氧→出水→闲置,运行参数为:水力停留时间7.0h,厌氧0.5h、曝气4.0h、缺氧/厌氧2.5h;电流30～60mA,溶解氧(DO)4.0～5.0mg/L,碳氮比(C/N)>10.0。电极-SBBR体系对沼液中全氮(TN)、Cu2+、化学耗氧量(COD)的去除率分别达到45.79%、86.53%和84.86%,可以作为沼液脱氮除铜的新工艺。For consideration of excessive ammonia nitrogen （NH4＋-N） in concentrated biogas slurry,and copper （Cu2＋） caused by additions of feed additives,a new system of electrode-sequencing batch biofilm reactor （SBBR） technique was constructed for simultaneously removing the NH4＋-N and copper in concentrated biogas slurry,through integrating the advantages of two methods including electrode-biofilm and SBBR.Meanwhile,through simulated wastewater and biogas slurry,the both of pertinent parameters and effects of electrode-SBBR were also investigated.The results showed that the operating process of this technique was：adding water → anaerobic processing → aeration → anoxic or anaerobic processing → effluent dewatering → idle.The optimal conditions were suggested as follows：hydraulic retention time （HRT） was 7.0 h,anaerobic and aeration time was 0.5 h and 4.0 h respectively,and anoxia /anaerobic time was 2.5 h,furthermore,electric current ranged 30-60 mA,DO was 4.0-5.0 mg/L and C/N ratio was greater than 10.0.In summary,the removing efficiencies of total nitrogen,Cu2＋ and COD from the biogas slurry could reach to 45.79%,86.53% and 84.86% respectively by the electrode-SBBR system.The results indicate that the electrode-SBBR system can be considered as a new technique for removal of nitrogen and copper from the biogas slurry simultaneously.

关 键 词：电极 脱氮 铜 SBBR 沼液 

分 类 号：X172[环境科学与工程—环境科学]