【摘要】 针对低温条件下AAO工艺运行效率减慢,生物活性降低的问题,以商丘污水处理厂为例,基于污水处理工艺模拟软件-Sumo对该污水处理厂1月份的运行情况进行了动态模拟,并对该温度和进水条件下污水处理厂的运行加以优化。研究表明,通过灵敏度分析和参数的修正,工艺模拟软件可较好的模拟低温条件下污水处理厂的运行情况。随着混合液回流比从50%提升至400%,污水处理厂的脱氮效果有所增强,除磷效果有所减弱,而COD的去除效率变化不大。好氧段的最佳DO浓度为1.95 g O₂/m³。当DO浓度大于1.95 gO₂/m³时,随着溶解氧的增加,TN的去除率有所下降,而NH₃-N、COD、TP的去除效果则基本不变。以混合液回流比为300%,DO浓度为1.95 g O₂/m³作为优化后的污水处理厂运行条件,可知优化后出水TN有明显降低,出水TP并未出现明显下降,污水处理厂的运行效果得到进一步的优化。更多还原

【Abstract】 The problem of slowing down of AAO process operation efficiency and reducing biological activity under low temperature conditions was focused. The operation of the sewage treatment plant in January was dynamically simulated based on the wastewater treatment process simulation software-sumo, taking Shangqiu sewage treatment plant as an example. And the operation of the sewage plant was optimized under the same temperature and influent conditions. Research revealed that through sensitivity analysis and parameter correction, the process simulation software could simulate the operation of the sewage plant under low temperature conditions perfectly. The denitrification effect of the sewage plant was enhanced, the phosphorus removal effect was weakened as the mixture reflux ratio increased from 50% to 400%, the removal efficiency of COD was not changed obviously. The optimal DO concentration of aerobic reactor was 1.95 g O₂/m³. With the increase of dissolved oxygen, the removal rate of TN was decreased and the removal efficiency of NH₃-N, COD and TP was basically unchanged when the DO concentration was greater than 1.95 g O₂/m³. Taking the mixed liquid reflux ratio of 300% and the concentration of DO of 1.95 g O₂/m³ as the operating conditions of the optimized sewage treatment plant, it can be seen that after optimization, the effluent TN has significantly decreased while the effluent TP has not significantly decreased, and the operation effect of the sewage treatment plant has been further optimized.更多还原