【摘要】 为实现稳定达标和节能降耗的目标,基于精细化管理,结合采用典型改良A2/O工艺的江边污水厂三期工程生产运行实际,从工艺强化脱氮除磷和设备节能的角度,对污水处理厂的优化运行控制策略进行了研究。结果表明,利用回流污泥内源反硝化作用可强化脱氮,脱氮量增加了3.87 mg/L,提高约24%,对工艺脱氮的贡献率为19%;提高生物池池容利用率可强化脱氮并实现节能,脱氮能力可提高约3.3 mg/L,出水TN可由8 mg/L降低到4.7 mg/L,并利用环沟型好氧池的水力作用实现混合液的内回流,无内回流动力消耗;充分利用生物除磷可降低化学除磷药耗,通过提高厌氧池进水比例,在进水TP均值为3.48 mg/L的条件下,二级出水TP浓度即稳定达到了一级A标准,最大值为0.39 mg/L;降低生物池搅拌功率密度可节省电能,通过将搅拌功率密度由7W/m3降低到3.5 W/m3,可节能约19×104kW·h/a。更多还原

【Abstract】 To realize the objectives of meeting standard,saving energy and reducing consumption, based on refined management,combined with the practical operation of Jiangbian WWTP with modified A2/ O process,the control strategy for optimum operation of WWTP was studied in terms of enhancing nitrogen and phosphorus removal and energy savings. The results showed that: utilization of endogenous denitrification of recycled sludge could enhance nitrogen removal,amount of nitrogen removal could be increased by 3. 87 mg / L or 24%,and it contributed to 19% of nitrogen removal. Increasing the utilization rate of biological tank volume could enhance nitrogen removal with energy savings,the nitrogen removal capacity could be increased by 3. 3 mg / L,effluent TN decreased from 8 mg / L to 4. 7 mg / L,andthe hydraulic action of oxidation ditch was utilized to realize internal cycle of mixed liquid with no energy consumption. Making full use of biological phosphorus removal could reduce consumption of coagulant for chemical phosphorus removal,and a maximum TP concentration of 0. 39 mg / L in the effluent could be achieved by increasing the influent ratio in the anaerobic tank when TP in the influent was 3. 48 mg / L. Reducing the mixing power in biological tank was a viable energy-saving measure. 190 thousands kW·h could be saved annually by reducing the mixing power from 7 W / m3to 3. 5 W / m3.更多还原