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炼油厂含硫污水因含高浓度的油、COD、硫化物及挥发酚而难于生化降解,催化剂生产中排放的污水因含高浓度的氨氮、盐类、悬浮物质以及低浓度的有机物而成为水处理的难题.本文采用一种曝气生物流化床(ABFT)工艺,对含硫污水和催化剂高氨氮污水的混合污水进行了现场连续试验,结果表明:在混合污水COD为2090mg/L、氨氮为600mg/L、挥发酚为27mg/L和硫化物为154mg/L的情况下,ABFT系统出水COD为95mg/L、氨氮为4.0mg/L、挥发酚为0.30mg/L和硫化物为0.0067mg/L,出水达到了国家污水排放标准一级标准.在处理工艺中,动态氧化和混凝沉淀作为预处理,ABFT反应器采用了合成高分子载体固定化微生物技术,该载体具有大孔网状以及优良的机械强度和化学性能,高效微生物B350通过化学键固定在载体上.克氏定氮法表明,ABFT中生物负载量为32mg/L.试验结果显示:在处理高氨氮污水方面,ABFT工艺比SBR工艺具有更强的优势,同时,ABFT系统具有较高的处理效率和耐冲击负荷能力.
Due to the high concentration of oil, COD, sulfide and volatile phenol in the refinery sulfur-containing wastewater, it is difficult to biodegrade. The sewage discharged from the catalyst production is water due to the high concentration of ammonia nitrogen, salts, suspended substances and low concentration of organic compounds A kind of aerated biological fluidized bed (ABFT) process was used in this paper to carry out a continuous field test on the mixed wastewater containing sulfurous sewage and high ammonia nitrogen wastewater from the catalyst. The results showed that when the COD of mixed sewage was 2090mg / L, Of 600mg / L, 27mg / L of volatile phenol and 154mg / L of sulfide, the effluent COD was 95mg / L, the ammonia nitrogen was 4.0mg / L, the volatile phenol was 0.30mg / L and the sulfide was 0.0067 mg / L, the effluent meets the national wastewater discharge standard level 1. In the treatment process, dynamic oxidation and coagulation and sedimentation are used as pretreatment. ABFT reactor adopts synthetic macromolecular carrier immobilized microorganism technology, Like, as well as excellent mechanical strength and chemical properties, high efficiency microorganism B350 was immobilized on the carrier by chemical bond.The Kjeldahl method showed that the bioburden load in ABFT was 32 mg / L. The results showed that in the treatment of high ammonia nitrogen wastewater, the ABFT process SBR process has more advantage, while, ABFT system has high efficiency and resistance to shock loading capability.