【作者】 姜峰；

【导师】 潘永亮；

【作者基本信息】 四川大学 ， 化工过程机械， 2005， 硕士

【摘要】 本文研究了以聚丙烯酸酯类高分子材料为载体的附着与悬浮生长SBR 工艺处理人工合成废水的性能;并将其与传统活性污泥SBR 工艺在COD、NH₄⁺-N 去除率等方面进行了对比研究。由于有生物膜附着于载体上,附着与悬浮生长SBR 工艺又称生物膜SBR（BSBR）工艺。本BSBR 工艺性能研究结果表明,采用3 小时曝气,曝气量0.4m3/h,1 小时沉淀,可较好处理COD 浓度约为1200mg/L 的实验配置废水,COD 去除率可达到90%以上,NH₄⁺-N 去除率也可达到70%以上。影响COD 去除率的最主要因素为曝气量,曝气时间、沉淀时间也有一定影响。影响NH₄⁺-N 去除率的最主要因素为曝气时间,溶解氧（DO）浓度对NH₄⁺-N 硝化反应的影响要比对COD 去除的影响大。当悬浮物浓度（SS）较低时,附着与悬浮生长SBR 工艺仍有比较好的处理效果,即该法能适应较低微生物浓度条件。BSBR 工艺系统承受冲击负荷实验时恢复很快,表现出具有良好的抗冲击能力。实验中探索了曝气、搅拌、静置三个阶段按不同的组合模式的处理效果。采用先缺氧搅拌1 小时,然后曝气3 小时,再静置1 小时后排放的模式处理效果最理想。在碳氮比对处理效果的研究中发现,当COD/NH₄⁺-N 比维持在10²5 范围,无论COD或NH₄⁺-N 均有较好的去除效果。硝化过程的最佳pH 值范围为8⁹,反硝化过程的最佳pH 值是7⁹。维持硝化、反硝化阶段合理的pH 值范围对生物脱氮有一定作用。附着与悬浮生长SBR 工艺与活性污泥SBR 工艺在COD 处理方面的表现类似。附着与悬浮生长SBR 工艺COD 平均去除率为91.8%,活性污泥SBR 工艺COD 平均去除率为89.6%。这说明在完成溶解性有机物去除及碳氧化方面,附着与悬浮生长工艺比活性污泥SBR 工艺具有一些优势。附着与悬浮生长SBR 工更多还原

【Abstract】 Using polymer porous particulate as carriers, some wastewater treatment characteristics of suspended-attached system in sequencing batch reactor were studied in this thesis. COD and NH₄⁺-N removal rates were compared between suspended-attached system and activated sludge system. Good removal rate of suspended-attached system（or bio-film system） in sequencing batch reactor（BSBR） was attainted during treating wastewater at influent COD concentration of 1200mg/L when adopting 3 hours aeration and 1 hour settling. The results indicated that the removal rates of COD and NH₄⁺-N were higher than 90% and 70% respectively. Main factors affecting COD removal rate were orderly aeration volume, aeration and settling duration. As to NH₄⁺-N, main factors were orderly aeration duration, aeration volume and settling duration. Dissolved oxygen（DO） showed more effects on NH₄⁺-N removal than COD removal. High removal efficiency in BSBR was attained even if suspended sludge （SS） concentration was relatively low. In another word, the BSBR showed good adaptability in low microbiological concentration. The BSBR recovered to good condition quickly after impact load, which told us its nice anti-impacting-load ability. The removal efficiency of different modes with aeration, mixture and setting combination were researched. Best treatment efficiency had been observed when adopting the mode with 1 hour mixture, following 3 hours aeration, and then 1 hour setting. On researching the influence of C:N ratio to the treatment efficiency, we found when COD/NH₄⁺-N remained in the range of 10²5, COD and NH₄⁺-N had preferable removal rates. The optimal pH range values are 8⁹ and 7⁹ respectively during the processes of nitrification and denitrification. BSBR could reach to 91.8% mean COD removal rate, which showed the same behavior with SBR on COD removal. The mean COD removal rate of the latter could reach to 89.6%.A conclusion that BSBR was more superior than SBR on removing dissolved organic content could be attained from the small difference of mean COD removal rate.更多还原