摘要
在自行设计的2000m·3d-1规模的生物流化床A/O2工艺中,以实际焦化废水为研究对象,采用GC/MS法分析各单元工艺的有机物组分,解析了污染物的降解规律.结果发现,焦化废水中酚类物质占有机物总量的90%以上;厌氧阶段对废水COD的去除率为10%~15%,主要为大分子复杂有机物分解为有机酸、有机醇类,此过程使废水BOD/COD值由0.30提高到0.45;一级好氧阶段可去除大部分的酚、胺、喹啉、吡啶、呋喃、吲哚、萘等组分,COD的去除率达到65%~70%;二级好氧阶段的COD去除率为40%~50%.间甲苯酚、哌嗪、哌啶、长链烃类、苯类等在生物处理出水中可被检出,属于难降解成分,有必要对其进行深度处理.采用TTC脱氢酶法测试了不同工艺段废水对酶活的影响,在相同的TOC浓度时,厌氧出水和一级好氧出水的酶活达26~29μg·h-1,滤池出水的酶活为几个工艺段水质的最低值7.02μg·h-1,显示其中可被微生物利用的有机物急剧减少.
The phenol-cyanide wastewater of coking plant in Guangdong Province was studied. The 2000m^3 · d^-1 wastewater was treated with a selfdesigned A/O1/O2 biological fluidized bed and the organic compounds of different tanks were analyzed by GC/MS method, The results indicated that more than 90% organic compounds are volatile phenol; the removal rate of COD is 10% - 15% during anaerobic stage and the B/C ratio is increased from 0. 30 to 0.45 while the complex compounds were degraded to organic acids and organic alcohols. Phenol, amine, quinoline, pyridine, furan, indole and naphthalene could be biodegraded under 01 stage and the removal rate of COD is 65% - 70%. The removal rate of COD during O2 stage is 40% - 50%. m-Cresol, piperidine, piperazine, long chain aikanes, benzene series can be detected in the outflow and they are hard-biodegraded compounds which need advanced treatment. Under the same TOG strength, TTC dehydrogenase activities of A and O1 process were higher while the wastewater from filter tank is lowest which means the mlcrobe-utilized organic compounds are insufficient .
出处
《环境科学学报》
CAS
CSCD
北大核心
2006年第11期1785-1791,共7页
Acta Scientiae Circumstantiae
基金
国家自然科学基金资助项目(No.50278036)~~
关键词
生物流化床
焦化废水
GC/MS
有机物
脱氢酶活
biological fluidized bed
eoking wastewater
GC/MS
organic compounds
dehydrogenase activity
