利用可生物降解固体碳源进行反硝化的研究  

Denitrification by Biodegradable Solid Carbon Source

作　　者：吉芳英[1] 陈思[1] 杨肃博 刘娜[1] 张千[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆忠庆环境工程咨询服务有限公司,重庆400016

出　　处：《中国给水排水》2013年第19期14-17,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07314-001)

摘　　要：为解决低碳源污水反硝化阶段碳源不足的问题,考虑固体材料的生物可降解性及经济因素,选取4种固体碳源并用于处理硝化阶段出水,考察了挂膜及反硝化效果。扫描电镜(SEM)观察发现淀粉餐盒挂膜较明显,其余材料表面则没有明显的挂膜现象。微生物可以利用淀粉餐盒、纤维餐盒、PBAT材料作为固体碳源进行较明显的反硝化,其反硝化速率排序为:淀粉餐盒>纤维餐盒>PBAT,分别为25.35、12.63、6.23 mg/(L·d)。在该过程中COD溶出浓度均小于50 mg/L,且NO-3-N的减少量与COD溶出量呈明显的正相关,相关度>0.85。淀粉餐盒的挂膜效果较好、反硝化速率最快,且COD溶出量未超标,是一种较为理想的固体碳源材料。To solve the problem of insufficient carbon source during denitrification of low carbon source sewage, considering the biodegradability and the economic factors of solid materials, 4 kinds of solid carbon sources were selected to treat nitrification effluent. The biofilm growth and denitrifieation rate were investigated. Using SEM, biofilm growth was observed on starchy meal box and not on other materi- als. Microorganisms could use starchy meal box, fibrous meal box and PBAT to perform denitrifieation. The denitrification rates by starchy meal box, fibrous meal box and PBAT were 25.35 mg/（ L · d）, 12.63 mg/（L· d） and 6.23 mg/（L ·d） respectively. For each material, the release concentration of COD was below 50 mg/L during denitrifieation. The reduction of NO3- - N was positively correlated with the release of COD, and the correlation coefficient was greater than 0.85. Starchy meal box is a desired solid carbon source material for high biofilm growth rate, high denitrification rate and acceptable release of COD.

关 键 词：反硝化 固体碳源 低碳源污水 

分 类 号：X703[环境科学与工程—环境工程]