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

YE Qian; CAI Chen

doi:10.13205/j.hjgc.202505003

Volume 43 Issue 5

May 2025

Turn off MathJax

Article Contents

Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(5): 20-27

YE Qian, CAI Chen. Research on efficiency of co-treating gas condensate water and domestic sewage in a steel industrial park[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 20-27. doi: 10.13205/j.hjgc.202505003

Citation:

YE Qian, CAI Chen. Research on efficiency of co-treating gas condensate water and domestic sewage in a steel industrial park[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(5): 20-27. doi: 10.13205/j.hjgc.202505003

Citation:

PDF( 1373 KB)

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

doi: 10.13205/j.hjgc.202505003

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

Received Date: 2024-06-18
Accepted Date: 2024-08-16
Rev Recd Date: 2024-08-12

Available Online: 2025-09-11

Abstract

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

FullText(HTML)

References(22)

References

[1]	JIN Y B. Feasibility study of urban domestic wastewater as water source for iron and steel industry[J]. Construction Science and Technology，2008（14）:75-78. 金亚飚. 城市生活污水作为钢铁工业水源的可行性探讨[J]. 建设科技，2008（14）:75-78.
[2]	GUAN X Y，XIE H，HU R，et al. Experimental study of aeration biofilter for treatment of low load domestic wastewater[J] Resources Economization& Environmental Protection，2023（12）:85-89. 管绪友，谢毫，胡瑞. 曝气生物滤池处理低负荷生活污水试验研究[J]. 资源节约与环保，2023（12）:85-89.
[3]	HOU Y L. Monitoring investigation and treatment analysis of comprehensive sewage quality in an iron and steel park[J]. Shanxi Chemical Industry，2020，40（3）:170-172. 侯亚龙. 某钢铁园区综合污水水质监测调查及处理分析[J]. 山西化工，2020，40（3）:170-172.
[4]	Editorial Board of Monitoring and Analysis Methods for Water and Wastewater of the State Environmental Protection Administration. Monitoring and analysis methods for water and wastewater[M]. Beijing:China Environmental Science Press，2002. 国家环境保护总局水和废水监测分析方法编委会. 水和废水监测分析方法4版[M]. 北京:中国环境科学出版社，2002.
[5]	FU Q Q，CHEN Z Q，YU Z G，et al. Ozonation enables to suppress horizontal transfer of antibiotic resistance genes in microbial communities during swine manure composting[J]. Chemical Engineering Journal，2023，462.
[6]	XIE L J，JI J L. Study on the corrosion of gas pipeline network in Meisteel and countermeasures[J]. Metallurgical Power，2023（3）:26-28，32. 谢礼健，嵇金龙. 梅钢煤气管网腐蚀情况研究与处理措施[J]. 冶金动力，2023（3）:26-28，32.
[7]	GAO D W，AN R，TAO Y，et al. Impact of organic loading on anoxic tank-aerobic MBR system[J]. Journal of Harbin Institute of Technology，2010，42（6）:886-889，903. 高大文，安瑞，陶彧，等. 有机负荷对缺氧-好氧MBR系统的影响[J]. 哈尔滨工业大学学报，2010，42（6）:886-889，903.
[8]	LIN S S，WANG Y，LIN J F，et al. Dominant bacteria correlated with elimination of sludge in an innovative reactor[J]. Progress in Natural Science-Materials International，2009，19（12）:1765-1771.
[9]	CHEN C，XU X J，XIE P，et al. Pyrosequencing reveals microbial community dynamics in integrated simultaneous desulfurization and denitrification process at different influent nitrate concentrations[J]. Chemosphere，2017，171:294-301.
[10]	DEDYSH S N，IVANOVA A A，BEGMATOV S A，et al. Acidobacteria in fens:phylogenetic diversity and genome analysis of the key representatives[J]. Microbiology，2022，91（6）:662-670.
[11]	KINDAICHI T，YURI S，OZAKI N，et al. Ecophysiological role and function of uncultured Chloroflexi in an anammox reactor[J]. Water Science and Technology，2012，66（12）:2556-2561.
[12]	ZHAO W H，BI X J，PENG Y Z，et al. Research advances of the phosphorus-accumulating organisms of Candidatus Accumulibacter，Dechloromonas and Tetrasphaera:metabolic mechanisms，applications and influencing factors[J]. Chemosphere，2022，307:135675.
[13]	ZHU Y，ZHANG X，WU X，et al. Carbon-driven enrichment of the crucial nitrate-reducing bacteria in limed peat soil microcosms[J]. Letters in Applied Microbiology，2017，65（2）:159-164.
[14]	WEI J M，CUI L J，LI W，et al. Denitrifying bacterial communities in surface-flow constructed wetlands during different seasons:characteristics and relationships with environment factors[J]. Scientific Reports，2021，11（1）:4918.
[15]	DUFFNER C，HOLZAPFEL S，WUNDERLICH A，et al. Dechloromonas and close relatives prevail during hydrogenotrophic denitrification in stimulated microcosms with oxic aquifer material[J]. Fems Microbiology Ecology，2021，97（3）:fiab004.
[16]	MAGALHAES C M，MACHADO A，BORDALO A A. Temporal variability in the abundance of ammonia-oxidizing bacteria vs. archaea in sandy sediments of the Douro River estuary，Portugal[J]. Aquatic Microbial Ecology，2009，56（1）:13-23.
[17]	WU X T，HE Y Q，LI G X，et al. Genome sequence of sulfide-dependent denitrification bacterium Thermomonas sp. Strain XSG，isolated from marine sediment[J]. Microbiology Resource Announcements，2021，10（15）. DOI: 10.1128/MRA.00057-21.
[18]	ABIRIGA D，JENKINS A，KLEMPE H. Microbial assembly and co-occurrence network in an aquifer under press perturbation[J]. Annals of Microbiology，2022，72（1）. DOI: 10.1186/s13213-022-01698-0.
[19]	MCILROY S J，ALBERTSEN M，ANDRESEN E K，et al.'Candidatus Competibacter'-lineage genomes retrieved from metagenomes reveal functional metabolic diversity[J]. Isme Journal，2014，8（3）:613-624.
[20]	WEI M Z，LIU J W，YANG Q Z，et al. Denitrification mechanism in oxygen-rich aquatic environments through long-distance electron transfer[J]. NPJ Clean Water[ 2025-07-01]. DOI: 10.1038/s41545-022-00205-x.
[21]	XU Z，DAI X，CHAI X. Effect of different carbon sources on denitrification performance，microbial community structure and denitrification genes[J]. Science of the Total Environment，2018，634:195-204.
[22]	ZHAO W，BI X，PENG Y，et al. Research advances of the phosphorus-accumulating organisms of Candidatus Accumulibacter，Dechloromonas and Tetrasphaera:metabolic mechanisms，applications and influencing factors[J]. Chemosphere，2022，307:135675.