Design of emergency expansion project for sewage treatment plant with multi process coupling control

doi:10.19965/j.cnki.iwt.2024-0489

Abstract

Abstract:

The emergency rescue and expansion project of sewage treatment plants has always been a difficult point in the water treatment industry, especially the coupling regulation of multiple processes brings greater risks and uncertainties to emergency rescue. To control the overflow pollution of the external pipeline network, a sewage treatment plant in Hunan needs to urgently expand its treatment capacity from 6.0×10⁴ m³/d to 1.2×10⁵ m³/d within 90 days,and production cannot be stopped or reduced during the construction period, which does not bring secondary risks. This project aims to address the difficulties of multi process coupling regulation. The advanced high concentration composite powder carrier bio-fluidized bed technology(HPB technology) was used to explore the potential of the existing main process AAO in the original tank, and a new integrated secondary sedimentation tank and filter cloth filter tank were constructed. Through the linkage regulation of multiple processes before and after, the emergency expansion and safe operation of the sewage treatment plant had been successfully doubled. After completion, the treated water volume would reach a stable level of 1.20×10⁵ m³/d or above, and the effluent would meet the Class A standard of the Pollutant Discharge Standard for Urban Sewage Treatment Plants(GB 18918-2002). The design, procurement, construction, and commissioning of this project took a total of 80 days, and the entire construction process was achieved without stopping or reducing production, without bringing any secondary risks and causing negative impact on production.

Key words: multi process coupling, high concentration powder carrier bio-fluidized bed, digging potential in the original pool, integrated equipment

摘要：

污水处理厂应急扩建工程一直是水处理行业的难点，尤其是多工艺之间的耦合调控为应急扩建带来更大的风险和不确定性因素。为控制厂外管网溢流污染，湖南某污水处理厂需在90 d内将处理规模从6.0×10⁴ m³/d应急扩建至1.2×10⁵ m³/d，且施工期间不能停产、减产，不能带来次生风险。针对多工艺耦合调控的难点，采用高浓度复合粉末载体生物流化床技术（HPB技术）对现主体工艺AAO进行原池挖潜，并新建一体化二沉池和滤布滤池，通过前后多工艺联动调控，成功实现该污水厂应急扩建翻倍和安全运行。建成后处理水量稳定达到1.20×10⁵ m³/d以上，出水稳定达到《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A标准。工程设计、采购、施工和调试共耗时80 d，施工全过程实现不停产、不减产，未带来次生风险，对生产未造成消极影响。

关键词: 多工艺耦合, 高浓度复合粉末载体生物流化床技术, 原池挖潜, 一体化设备

CLC Number:

X703

Qiwen WU, Zhen CHAO, Xizhao WANG, Ying XU, Siyuan CHEN, Hongbo HAN, Wu WEN, Yun TIAN. Design of emergency expansion project for sewage treatment plant with multi process coupling control[J]. Industrial Water Treatment, 2025, 45(4): 186-193.

伍启文, 巢真, 王喜昭, 徐莹, 陈思源, 韩红波, 文武, 田云. 多工艺耦合调控的污水处理厂应急扩建工程设计[J]. 工业水处理, 2025, 45(4): 186-193.

/ / Recommend / Download Citations

URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2024-0489

https://www.iwt.cn/EN/Y2025/V45/I4/186

Figures/Tables 10

Table 1 Current designed inlet and outlet water quality

基本控制项目	COD	BOD₅	NH₃-N	TN	TP	SS
设计进水水质	240	120	24	30	2.7	160
设计出水水质	≤50	≤10	≤5（8）	≤15	≤0.5	≤10

Fig.1 Process flow diagram of three expansion and renovation schemes

Table 2 Comparison and analysis of three expansion and renovation processes

项目	方案一	方案二	方案三
工程量	大	较大	较小
工期	4个月	3个月	3个月
不停水施工	可实现	难实现	可实现
能否翻倍扩容	可达	生化池翻倍扩容有一定难度	可达
投资	1.8亿	7 200万	5 600万

Fig.2 Emergency expansion process flowchart

Fig.3 Emergency expansion layout plan

Table 3 Main process parameters before and after the transformation of the biochemical tank

设计工艺参数	改造前	改造后
厌氧区HRT/h	1.44	0.72
缺氧区HRT/h	3.09	1.55
好氧区HRT/h	8.83	4.42
总HRT/h	13.36	6.69
好氧区污泥质量浓度/（g·L^-1）	3~4	4~6
内回流比/%	200~400	100~200
外回流比/%	20~100	54~81
气水比	4.2	4.0

Fig.4 Aerator installation without water interruption

Fig.5 Agitators installation without water interruption

Fig.6 Lifting pump installation without water interruption

Fig.7 The inlet and outlet water quality after emergency expansion and renovation

References 7

1	肖天宇，王凯，武道吉，等. MBBR填料及其改性方法研究进展［J］. 工业水处理，2023，43（3）：23-30． doi:10.1177/09540083221131456
	XIAO Tianyu， WANG Kai， WU Daoji，et al. Research progress of MBBR filler and its modification methods［J］. Industrial Water Treatment，2023，43（3）：23-30． doi:10.1177/09540083221131456
2	李志伟，赵治东，祁学玲，等. MBBR在西藏某污水厂低温环境的应用效果分析［J］. 工业水处理，2023，43（8）：185-192．
	LI Zhiwei， ZHAO Zhidong， QI Xueling，et al. Application analysis of MBBR in a wastewater treatment plant of Tibet with low temperature［J］. Industrial Water Treatment，2023，43（8）：185-192．
3	郭春梅，张晓玉，王业腾，等. A/O-MBR工艺调试强化炼化废水脱氮除碳及模拟研究［J］. 工业水处理，2025，45（2）：96-103.
	GUO Chunmei， ZHANG Xiaoyu， WANG Yeteng，et al. A/O-MBR process debugging for enhancing denitrification and decarbonization of refining wastewater and simulation research［J］. Industrial Water Treatment，2025，45（2）：96-103.
4	邓岳鹏，赵鹏，唐升引，等. OAAO-陶瓷膜MBR一体化工艺用于市政污水处理厂扩容工程［J］. 工业水处理，2024，44（10）：201-206．
	DENG Yuepeng， ZHAO Peng， TANG Shengyin，et al. Integrated OAAO-ceramic membrane MBR process for the capacity expansion of municipal wastewater treatment plant［J］. Industrial Water Treatment，2024，44（10）：201-206．
5	朱灿耀，宾伟，刘薇薇，等. HPB技术在污水处理厂改造中的应用及运行效果［J］. 广东化工，2022，49（20）：153-156．
	ZHU Canyao， Wei BIN， LIU Weiwei，et al. Application and operation effect of HPB technology in renovation of sewage treatment plant［J］. Guangdong Chemical Industry，2022，49（20）：153-156．
6	李航，庞飞，张欣，等. 多点进水与多点化学除磷强化脱氮除磷工程实例［J］. 工业水处理，2020，40（12）：119-123．
	LI Hang， PANG Fei， ZHANG Xin，et al. Project case of multi-point influent and multi-point chemical dephosphorization for enhancing nitrogen and phosphorus removal［J］. Industrial Water Treatment，2020，40（12）：119-123．
7	颜加兴，顾群，邓宇，等. 硅藻土基复合粉末载体在城镇污水处理中的应用［J］. 净水技术，2023，42（3）：106-112．
	YAN Jiaxing， GU Qun， DENG Yu，et al. Application of diatomite-based composite powder carrier in municipal wastewater treatment［J］. Water Purification Technology，2023，42（3）：106-112．

[1]	Haibo MA, Liyong MIAO, Bo XIAO, Zhijie LIU, Xiaoyu JIANG, Yi RONG, Wuang REN. Research on the treatment efficiency of improved sequential batch integrated wastewater equipment [J]. Industrial Water Treatment, 2024, 44(12): 59-66.
[2]	Xiankun WANG, Zhichao TIAN, Nan ZHOU, Zhirong ZHAO, Shishi HE, Yange YU, Xiaoyuan GU, Deqin ZHAI, Maosheng ZHENG. Immobilized microorganism technology for treatment of residual water from river dredged sediment [J]. Industrial Water Treatment, 2023, 43(12): 123-132.
[3]	Ji Min, Wang Jian, Zhang Xuqiang, Wang Dejin, Sun Yunfeng, Chao Meng. FulI scale experiment of the innovative integrated equipment for treating gas．field wastewater [J]. INDUSTRIAL WATER TREATMENT, 2005, 25(3): 32-36.

Please choose a citation manager

Content to export