摘要
【目的】污水处理行业中,曝气系统与药剂投加系统始终占据着运营成本的较大部分,为应对污水处理厂运行能耗与药耗过高的行业共性问题,研究以苏州市A厂(氧化沟工艺)与B厂[厌氧-缺氧-好氧(AAO)工艺]的节能降耗改造为研究对象,通过构建“工艺诊断-针对性改造-效能验证”的技术路径,探索2种常见工艺下的节能降耗升级路径。【方法】通过系统性分析两厂工艺特征与能耗药耗分布,提出工艺优化、曝气系统精准调控、药剂智能投加及设备能效提升等综合性改造措施,氧化沟工艺侧重于强化精准智能控制与水力流态改善,AAO工艺改造则侧重于碳源挖潜与硝化回流优化,同时两厂重点针对高能耗单元实施设备替换与运行参数优化。【结果】改造后两厂单位能耗分别降低4.63%和8.26%,A厂聚合氯化铝(PAC)用量在处理水量上升的工况下,较前3月平均用量减少了12.4%,同时碳源投加量较大幅减少;B厂PAC、次氯酸钠的平均用量分别降低了36.1%、47.2%。【结论】该工程通过差异化改造,证实了工艺针对性优化的关键作用,为2种常见工艺类型的污水厂低碳化改造提供了可复用的工程案例,在污水厂节能降耗改造项目中具有行业推广价值,为存量污水厂提质增效工程积累了实践经验。
[Objective]In the wastewater treatment industry,aeration systems and chemical dosing systems always account for a significant portion of operational costs.To address the common industry problem of high energy consumption and excessive chemical usage in wastewater treatment plants(WWTPs),this study focuses on energy-saving retrofitting of two WWTPs in Suzhou with different processes-WWTP A(oxidation ditch process)and WWTP B[anaerobic-anoxic-oxic(AAO)].By establishing a technical approach of"process diagnosis-targeted retrofitting-performance verification",we explored energy-saving upgrade paths for these two common processes.[Methods]Through systematic analysis of process characteristics and energy/chemical consumption distribution at both WWTPs,comprehensive retrofitting measures are proposed including process optimization,precise aeration control,intelligent chemical dosing,and equipment efficiency improvement.For the oxidation ditch process,we emphasized enhanced precision control and hydraulic flow pattern improvement.For the AAO process,the retrofitting focused on carbon source optimization and nitrification reflux adjustment.Both WWTPs implemented equipment replacement and operational parameter optimization for high-energy consumption units.[Results]After retrofitting,energy consumption per unit was reduced by 4.63%and 8.26%respectively at the two plants,with chemical dosage decreasing from 20%to 35%.At WWTP A,polyaluminum chloride(PAC)usage decreased by 12.4%compared to the previous three-month average despite increased treatment capacity,along with significant reduction in carbon source dosage.At WWTP B,average PAC and sodium hypochlorite usage decreased by 36.1%and 47.2%respectively.[Conclusion]This project demonstrates the critical role of process-specific optimization through differentiated retrofitting approaches.It provides replicable engineering cases for low-carbon upgrading of these two common process types,with valuable industry application potential for energy-saving retrofitting projects.The experience accumulated also contributes to efficiency improvement of existing WWTPs.
作者
张静晨
ZHANG Jingchen(Shanghai Tongji Environmental Engineering and Technology Co.,Ltd.,Shanghai 200092,China)
出处
《净水技术》
2025年第S1期392-398,共7页
Water Purification Technology
关键词
污水处理厂
AAO工艺
氧化沟工艺
优化改造
节能降耗
苏州市
wastewater treatment plant
anaerobic-anoxic-oxic(AAO)process
oxidation ditch process optimization and renovation
energy saving and consumption reduction
Suzhou City
作者简介
通信作者:张静晨(1982-),男,硕士研究生,研究方向为污水处理,E-mail:1148726722@qq.com。
