摘要
针对硫酸盐还原菌（SRB）处理多组分煤矿酸性废水（AMD）易受低pH值和高浓度重金属离子抑制、需要添加多种营养盐的问题，采用零价铁与麦饭石作为混合SRB的固定载体，构建上述两种材料分层组装的1^#动态柱和混合均匀组装的2^#动态柱（两种材料的体积比均为1：2），进行了连续变负荷对比试验研究。试验结果表明：1^#、2^#动态柱均有较强的pH值调节能力和Fe^2＋去除能力，两种材料的不同组装方式对其他污染物的去除存在较大差异；1^#动态柱对SO4^2-的还原速率为468．4mg／（L·d），相应的COD消耗速率为416．4mg／（L·d），实际消耗△COD／△SO4^2-值为0．56～0．89，适合于以高浓度硫酸盐及低有机物含量为特征的AMD处理；2^#动态柱适合于以Mn^2＋、NH3-N为特征污染物的AMD处理，对Mn^2＋、NH3-N的最大去除速率分别为20．3、11．3mg／（L·d）。
To address the problems of inhibition of low pH and high concentration of heavy metal ions and needing many nutritive salts in treating acid mine drainage （AMD） by sulfate-reducing bacteria （SRB）, zero-valent iron and maifan stone were acted as fixed carriers with different combinations for SRB. The 1^# column with stratified assembly and 2^# column with uniform mixing assembly （both the volume ratio of 1 ： 2） were built to conduct a comparative test with continuous variable load. The results showed that both the two columns had strong capabilities to adjust pH and remove Fe^2＋ , while the removal effects of other contaminants were influenced by different combinations of zero-valent iron and maifan stone. The SO4^2- could be removed at the rate of 468.4 mg/（ L·d） corresponding to COD removal rate of 416.4 mg/（ L ·d） with practical △COD/△SO4^- of 0.56 to 0.89 in 1^# column, which was suitable for treating AMD containing high concentration of sulfate and low organic matter. The removal rates of Mn^2＋ and NH3 - N were 20.3 mg/（ L · d） and 11.3 mg/（ L · d） respectively in 2^# column which was suitable for treating AMD containing Mn^2＋ and NH3 -N.
出处
《中国给水排水》
CAS
CSCD
北大核心
2015年第7期100-103,108,共5页
China Water & Wastewater
基金
国家自然科学基金资助项目(41102157
51304114)
污染控制与资源化研究国家重点实验室开放课题(PCRRF12015)
辽宁工程技术大学市场调研即校基金资助课题(SCDY2013014)
关键词
煤矿酸性废水
混合硫酸盐还原菌
零价铁
麦饭石
固定载体
acid mine drainage
mixed sulfate-reducing bacteria
zero-valent iron
maifan stone
fixed carrier
