钢铁工业园区煤气冷凝水与生活污水协同处理效能研究

叶倩; 蔡辰

doi:10.13205/j.hjgc.202505003

钢铁工业园区煤气冷凝水与生活污水协同处理效能研究

doi: 10.13205/j.hjgc.202505003

叶倩¹,
蔡辰^2, ,

1. 宝山钢铁股份有限公司能源环保部, 上海 201900;
2. 同济大学环境科学与工程学院, 上海 200092

基金项目:

国家自然科学基金项目“生物稳定化污泥施用对土壤有机碳动态变化的影响机制”（42277296）

详细信息

作者简介:
叶倩（1982—），女，高级工程师，主要研究方向为钢铁行业环境保护。yeqian0113@126.com

通讯作者:
蔡辰（1988—），男，副教授，主要研究方向为碳中和理论与技术。caic@tongii.edu.cn

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出版历程
- 收稿日期: 2024-06-18
- 录用日期: 2024-08-16
- 修回日期: 2024-08-12
- 网络出版日期: 2025-09-11

Research on efficiency of co-treating gas condensate water and domestic sewage in a steel industrial park

YE Qian¹,
CAI Chen^{2
, ,}

1. Energy and Environmental Protection Department of Baosteel, Shanghai 201900, China;
2. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

摘要

摘要: 钢铁工业园区常产生煤气冷凝水，具有低碳氮比和弱腐蚀性等特点，采用生物处理存在挑战。根据煤气冷凝水的量质特征，与园区内生活污水协同处理，既是一种低碳的技术方案，也可降低废水处理设施的建设成本。然而，目前尚无煤气冷凝水与生活污水协同处理的研究案例，其可行性仍需系统研究。基于生产性实验，通过水质监测和高通量测序等手段，考察了煤气冷凝水与生活污水合并处理对生物处理系统效能及微生物群落的影响。结果表明：一定比例（5%以内）煤气冷凝水与生活污水协同处理后，出水满足GB 13456—2012《钢铁工业水污染物排放标准》要求，同时生物处理系统中污染物的去除能力有所提高，COD去除率从51.8%提升至66.8%，TN去除率从10.5%提升至15.0%，但对NH₃-N和TP的去除影响不大。此外，煤气冷凝水的混入改变了系统中微生物群落多样性，驱动了微生物群落结构的演替。其中，Dechloromonas菌属富集明显，与碳氮去除呈现显著相关性，表明其多重代谢功能是系统污染物去除效率提升的重要原因。该研究验证了煤气冷凝水与生活污水协同处理的可行性，为进一步优化煤气冷凝水投加比例和系统处理效能奠定了理论基础。
- 煤气冷凝水 /
- 钢铁工业园区 /
- 协同处理 /
- 效能提升 /
- 微生物群落
Abstract: Steel industrial parks consume large amount of water， including both industrial and domestic water. Domestic wastewater in steel enterprises typically originates from canteens， bathrooms， and toilets， and contains pollutants like COD， BOD， and NH₃-N. Biological filters， known for their high efficiency and simplicity of operation， are commonly used for treating such wastewater. However， these wastewater streams often exhibit low carbon-to-nitrogen （C/N） ratios， posing challenges for biological nitrogen removal. In addition to domestic wastewater， steel industrial parks generate various production wastewater streams， such as coking wastewater， rolling wastewater， and gas condensate. With the increasing emphasis on achieving zero discharge of industrial wastewater， treating these streams separately has become essential. Gas condensate， which is similar in composition to domestic wastewater， contains biodegradable organics. Integrating its treatment with domestic wastewater can address the low C/N issue while reducing treatment costs. However， no existing studies have explored the feasibility of co-treating gas condensate and domestic wastewater.This study investigated the feasibility and effectiveness of integrating gas condensate with domestic wastewater treatment through a pilot-scale experiment in a steel industrial park. We monitored water quality changes and evaluated the impact of introducing gas condensate on microbial community diversity and structure using high-throughput sequencing. Correlation analyses between water quality parameters and microbial community characteristics were conducted to elucidate the mechanisms underlying treatment efficiency improvements. The study demonstrated that the integration of gas condensate significantly increased the concentration of organic matters in the influent， as evidenced by a 100% increase in BOD， and a 39% increase in COD. Despite this， the effluent COD levels remained stable and complied with the Discharge Standard of Water Pollutants for Iron and Steel Industry （GB 13456—2012）. The removal efficiency of COD improved from 51.8% to 66.8%， indicating enhanced system performance under higher organic loading. In terms of nitrogen removal， the addition of gas condensate did not adversely affect ammonia removal but significantly improved the total nitrogen removal efficiency from 10.5% to 15.0%. This was attributed to increased organic carbon availability for denitrification and potential shifts in microbial community dynamics. Microbial diversity analysis showed significant fluctuations in the Shannon， Pielou-e， Simpson， and Chao1 indices， indicating that gas condensate altered microbial community composition and metabolic pathways. The introduction of gas condensate also altered microbial community diversity， particularly enriching the genus Dechloromonas， which was significantly correlated with carbon and nitrogen removal. This practical case offers theoretical and technical guidance for low-carbon wastewater treatment and reuse in the steel industry.
- gas condensate /
- steel industry park /
- co-treatment /
- efficiency improvement /
- microbial community

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