摘要
针对石化行业含酚废水总量大,毒性大,难处理的问题,采用曝气生物流化床工艺对其进行处理。结果表明：在水力停留时间为8 h时,曝气生物流化床对COD的去除率可达97.2%,对总酚的去除率可达99.6%以上。通过影响因素研究,工艺最佳pH范围为7~8,最佳温度范围为26~30℃,最佳溶解氧范围为2.5~3 mg/L,对填料表面及内部的微生物相进行电镜分析发现填料表面生物相以丝状菌占优,填料内部生物量由表及里逐渐减少,丝状菌大量减少,微生物相以杆菌和球菌为主。
Aeration biological fluidized tank was studied aiming to solve the problems of phenol wastewater which appear as enormous,high toxic and difficult to treat in petrochemical industry. Results showed that when the hydraulic retention time was 8 hours,the removal rate of COD was above 97.2%,and the removal rate of total phenol was up to 99.6%. Through studying the influencing factors of aeration biological fluidized tank,the optimum pH range is 7~8,the optimum temperature range is 26~30 ℃ and the best DO range is 2.5~3 mg/L. Furthermore,electron microscope analysis of the filler’s surface and internal biological phase indicated that the filler’surface is mainly the filamentous bacteria,meanwhile,biomass is gradually reducing from outside to inside,specifically there is a considerable reduction in the amount of filamentous bacteria,and biological species of the filler’s inside are mainly bacilli and cocci.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第11期158-162,共5页
Environmental Science & Technology
关键词
曝气生物流化床工艺
改性聚胺酯多孔填料
混合酚废水
aeration biological fluidized tank
modified polyurethane porous filler
phenol wastewater
