沸石床多级生物膜系统处理焦化废水的研究  

Study on Zeolite Bed Multistage Biofilm System for Treatment of Coking Wastewater

作　　者：赵文涛[1] 黄霞[1] 何苗[1] 张彭义[1] 左晨燕[1] 

机构地区：[1]清华大学环境科学与工程系

出　　处：《中国给水排水》2008年第13期18-22,共5页China Water & Wastewater

基　　金：国家杰出青年基金资助项目(50725827)

摘　　要：采用沸石床多级生物膜系统处理焦化废水,考察了沸石填料对NH3-N的吸附特性以及系统的启动性能、去除效果和功能分区。结果表明,在25℃时,沸石填料对NH3-N的吸附符合Langmuir等温式,极限吸附容量为0.318mg/g;系统启动时间约为40d,其中挂膜为7d,硝化菌驯化为3d,异养菌驯化为30d;稳定运行条件下,当系统进水NH3-N负荷≤0.10kg/(m3·d)时,出水NH3-N和COD平均浓度分别为(2.4±1.2)mg/L和(134±34)mg/L,平均去除率分别为98.1%和85.8%,NH3-N达到了国家一级排放标准,COD达到了国家二级排放标准;系统的好氧段出现了三个功能区,即以去除COD为主的C区、同时去除COD和NH3-N的C/N区及以去除NH3-N为主的N区。The zeolite bed multistage biofilm system was used to treat coking wastewater. The adsorption characteristics of ammonia nitrogen by zeoXite media, start-up, poXXutants removal and function zones of the system were investigated. The results indicate that the adsorption of ammonia nitrogen by zeolite media follows the Langmuir adsorption isotherm equation, with maximum adsorption capacity of 0. 318 mg/g at 25 ℃. The start-up time of the system is about 40 days, consisting of 7 days for biofilm formation, 3 days for nitrobacteria domestication and 30 days for heterotrophic bacteria domestication. When the NH3 -N loading in the system influent is less than or equal to 0.10 kg/（m^3·d） , the average effluent NH3 -N and COD concentrations are （2.4 ± 1.2） mg/L and （134 ±34） mg/L with average removal rates of 98.1% and 85.8% , respectively. The NH3 - N meets the national first class discharge standard, and the COD meets the national second class discharge standard. Three different pollutant removal function zones, named as decarbonization zone, decarbonization/nitrification zone and nitrification zone exist in aerobic stage.

关 键 词：焦化废水 沸石 多级生物膜系统 

分 类 号：X703.1[环境科学与工程—环境工程]