摘要
以芦村污水厂为例,结合生产运行实际,在分析运行问题的基础上,从优化碳源投加量、充分利用生物除磷和控制混合液内回流点DO浓度三个方面分别开展精细化管理技术措施研究。结果表明,去除1 mg/L的NO_3^--N需要4.93 mg/L碳源乙酸,在现状平均强化脱氮需求为5mg/L的TN去除量下,芦村污水厂老厂区乙酸理论投加量为24.65 mg/L,商业碳源冰醋酸理论用量为0.274 t/10~4m^3水;通过化学协同除磷药剂投加量优化控制(投加量由100 mg/L降至70 mg/L),使工艺系统具有生物除磷能力,回流污泥厌氧释磷量可达15 mg/L,并且在反硝化除磷与碳源投加点优化条件下,碳源得到高效利用;低温季节现状芦村污水厂三期的好氧池3池容并未利用,可将其调控为消氧池模式运行,以控制混合液内回流点的DO浓度,理论上可使现状工艺系统脱氮能力提高2.25 mg/L。
Taking Lucun WWTP with high effluent standards and a typically modified A2/O process as an example, combined with operational realities, based on analysis of operational problems, refined management measures were studied from three aspects, including carbon source dosage optimization, biological phosphorus removal utilization and DO control at the mixture return point. The results showed that, removing 1 mg/L of NO3 - N required 4.93 mg/L of CH3 COOH. In the old plant of Lucun WWTP, the theoretical CH3COOH dosage was 24.65 mg/L, and the theoretical acetic acid usage for ten thousand cubic metres of wastewater was 0.274 t. Through the optimization control of phosphorus removal chemical dosage （from 100 mg/L to 70 mg/L） , phosphorus removal capacity was created in the current process and achieved 15 mg/L phosphorus release in the return sludge. Carbon source was utilized efficiently through optimization in denitrifying phosphorus removal and carbon source addition point. The third aerobic tank in the current third phase of Lucun WWTP was idle in low temperature seasons and could be used as a biological DO removal tank to control DO concentration at mixture return point, to en hance the nitrogen removal capacity of the current process by 2.25 mg/L.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第19期115-119,共5页
China Water & Wastewater
基金
国家水体污染控制与治理科技重大专项(2013ZX07314-002)
