Synergistic optimization and efficiency enhancement mechanisms of pre- and post-physicochemical coupled OHO biological treatment： a case study on coking wastewater

WANG Qing; CHENG Xiaoqian; KE Xiong; CHEN Acong; CHEN Yao; YANG Xuan; QIU Guanglei; WEI Chaohai

doi:10.13205/j.hjgc.202509004

Volume 43 Issue 9

Sep. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(9): 29-38

WANG Qing, CHENG Xiaoqian, KE Xiong, CHEN Acong, CHEN Yao, YANG Xuan, QIU Guanglei, WEI Chaohai. Synergistic optimization and efficiency enhancement mechanisms of pre- and post-physicochemical coupled OHO biological treatment： a case study on coking wastewater[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 29-38. doi: 10.13205/j.hjgc.202509004

Citation:

WANG Qing, CHENG Xiaoqian, KE Xiong, CHEN Acong, CHEN Yao, YANG Xuan, QIU Guanglei, WEI Chaohai. Synergistic optimization and efficiency enhancement mechanisms of pre- and post-physicochemical coupled OHO biological treatment： a case study on coking wastewater[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 29-38. doi: 10.13205/j.hjgc.202509004

Citation:

WANG Qing, CHENG Xiaoqian, KE Xiong, CHEN Acong, CHEN Yao, YANG Xuan, QIU Guanglei, WEI Chaohai. Synergistic optimization and efficiency enhancement mechanisms of pre- and post-physicochemical coupled OHO biological treatment： a case study on coking wastewater[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(9): 29-38. doi: 10.13205/j.hjgc.202509004

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Synergistic optimization and efficiency enhancement mechanisms of pre- and post-physicochemical coupled OHO biological treatment： a case study on coking wastewater

doi: 10.13205/j.hjgc.202509004

1. School of Environment and Energy, South China University of Technology, Guangzhou 510006, China;
2. School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen 361000, China

Received Date: 2024-11-05
Available Online: 2025-11-05
Publish Date: 2025-09-01

Abstract

Abstract

In the current landscape of industrial wastewater treatment， high energy and material consumption is widespread and poses significant challenges. Consequently， implementing strategies focused on energy conservation， efficiency improvement， and resource recovery has become essential to address these issues. This comprehensive study， focusing on coking wastewater treatment， seeks to develop an advanced synergistic strategy between resource recovery and stringent pollution control， by utilizing an innovative platform that couples physicochemical pre- and post-treatment with the OHO biological process. The findings revealed that ferrous salts demonstrated outstanding performance in the effective removal of cyanide ions （CN^-） and sulfide ions （S^2-） during the preliminary physicochemical treatment stage. Furthermore， the synergistic application of poly-ferric sulfate （PFS） combined with activated carbon （AC） has been proven to enable highly efficient purification of effluent discharged from biological treatment processes. By utilizing an advanced correlation analysis coupled model， the operational parameters of the preliminary physicochemical treatment unit were systematically refined， leading to the adjustment and reduction of the FeSO₄·7H₂O dosage to an optimized level of 120 mg/L. Additionally， through the application of response surface analysis， the study successfully achieved significant reductions in the dosages of both activated carbon （AC） and poly-ferric sulfate （PFS）， decreasing them by 130 mg/L and 100 mg/L， respectively. Furthermore， the strategic introduction of a meticulously engineered sludge countercurrent recycling mechanism demonstrated—through detailed engineering applications and practical verification—that the optimized effluent concentrations of COD， TN， CN^-， and S^2- were remarkably reduced from their original levels of （3750±12），（300±28），（26.7±2.4），（143±15） mg/L to impressively low levels of （44.6±8.0），（15.7±2.5），（0.12±0.02），（0.08±0.01） mg/L， respectively. This achievement successfully accomplished the deep reduction of pollutant emissions， demonstrating the effectiveness of the method in significantly lowering contaminant levels. Meanwhile， in comparison with conventional operational paradigms， this novel approach has been proven to deliver a significant reduction in operational costs， amounting to 2.31 yuan/m³， highlighting its profound economic and ecological benefits. These results demonstrate that by assigning specific， clearly defined roles and tailored functional objectives to each unit within the system， and by systematically exploring the deeply interconnected mechanisms across diverse treatment stages， the goals of wastewater treatment system optimization can be comprehensively and effectively realized.
- coking wastewater,
- OHO process,
- physicochemical technology,
- resource optimization,
- model analysis

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References(26)

References

[1]	KONG Q P，WU H Z，LIU L，et al. Solubilization of polycyclic aromatic hydrocarbons（PAHs）with phenol in coking wastewater treatment system:Interaction and engineering significance[J]. Science of The Total Environment，2018，628/629:467-473.
[2]	XING R，ZHENG Z Y，WEN D H. Comparison between UV and VUV photolysis for the pre-and post-treatment of coking wastewater[J]. Journal of Environmental Sciences，2015，29:45-50.
[3]	HE X G，KE X，WEI T，et al. Process energy and material consumption determined by reaction sequence:from AAO to OHO[J]. Water，2024，16（13）:1796.
[4]	WEI C，LI Z M，PAN J X，et al. An oxic–hydrolytic–oxic process at the nexus of sludge spatial segmentation，microbial functionality，and pollutants removal in the treatment of coking wastewater[J]. ACS ES &T Water，2021，1（5）:1252-1262.
[5]	ZHANG H，WEI C，CHEN A C，et al. Pre-aerobic treatment and dissolved oxygen regulation in full-scale aerobic-hydrolysis and denitrification-aerobic process for achieving simultaneous detoxification and nitrification of coking wastewater[J]. Bioresource Technology，2025，416:131754.
[6]	ZHAO C，ZHOU J，YAN Y，et al. Application of coagulation/flocculation in oily wastewater treatment:a review[J]. Science of The Total Environment，2021，765:142795.
[7]	CHEN A C，GUAN X H，PANG Z J，et al. Catalytic oxidation of biorefractory cyanide-containing coking wastewater by deconjugation effect of bimetal copper-loaded activated carbon[J]. Journal of Environmental Chemical Engineering，2023，11（6）:111283.
[8]	BERISTAIN-MONTIEL L，MARTíNEZ-HERNÁNDEZ S，CUERVO-LÓPEZ F D M，et al. Dynamics of a microbial community exposed to several concentrations of 2-chlorophenol in an anaerobic sequencing batch reactor[J]. Environmental Technology，2015，36（14）:1776-1784.
[9]	SUN G X，ZHANG Y，GAO Y X，et al. Removal of hard COD from biological effluent of coking wastewater using synchronized oxidation-adsorption technology:performance，mechanism，and full-scale application[J]. Water Research，2020，173:115517.
[10]	GARCIA-RODRIGUEZ O，LEE Y Y，OLVERA-VARGAS H，et al. Mineralization of electronic wastewater by electro-Fenton with an enhanced graphene-based gas diffusion cathode[J]. Electrochimica Acta，2018，276:12-20.
[11]	OBOTEY E E，RATHILAL S. Membrane technologies in wastewater treatment:a review[J]. Membranes，2020，10（5）:89.
[12]	JIA C C. Research on physicochemical synergy technology and pollutant removal mechanism of biological effluent of coking wastewater[J]. Shanxi Chemical Industry，2024，44（6）:239-241. 贾成成. 焦化废水生物出水物化协同技术及污染物去除机制研究[J]. 山西化工，2024，44（6）:239-241.
[13]	ZHOU H T，WEI C H，ZHANG F Z，et al. A comprehensive evaluation method for sludge pyrolysis and adsorption process in the treatment of coking wastewater[J]. Journal of Environmental Management，2019，235:423-431.
[14]	SHUAI W，WU Y L，HU Y，et al. Research on activated carben adsorption of biologically treated coking wastewater and its condition optimization[J]. Chinese Journal of Environmental Engineering，2010，4（6）:1201-1207. 帅伟，吴艳林，胡芸，等. 焦化废水生物处理尾水的活性炭吸附及条件优化研究[J]. 环境工程学报，2010，4（6）:1201-1207.
[15]	FAYYAZ SHAHANDASHTY B，FALLAH N，SHAMSI M，et al. Evaluation of enhanced chemical coagulation method for a case study on colloidal liquid particle in wastewater treatment:statistical optimization analysis and implementation of machine learning[J]. Journal of Environmental Management，2024，370:122345.
[16]	WANG X S，HUANG F，CHENG Y H. Computational performance optimization of support vector machine based on support vectors[J]. Neurocomputing，2016，211:66-71.
[17]	SINGH B，KUMAR P. Pre-treatment of petroleum refinery wastewater by coagulation and flocculation using mixed coagulant:optimization of process parameters using response surface methodology（RSM）[J]. Journal of Water Process Engineering，2020，36:101317.
[18]	MENSAH-AKUTTEH H，BUAMAH R，WIAFE S，et al. Optimizing coagulation–flocculation processes with aluminium coagulation using response surface methods[J]. Applied Water Science，2022，12（8）:188.
[19]	OCKULY R A，WEESE M L，SMUCKER B J，et al. Response surface experiments:a meta-analysis[J]. Chemometrics and Intelligent Laboratory Systems，2017，164:64-75.
[20]	GILCREAS F W. Standard methods for the examination of water and waste water[J]. American journal of public health and the nation's health，1966，56（3）:387-388.
[21]	YU X B，XU R H，WEI C H，et al. Removal of cyanide compounds from coking wastewater by ferrous sulfate:Improvement of biodegradability[J]. Journal of Hazardous Materials，2016，302:468-474.
[22]	LIU X L，YIN H L，ZHAO J，et al. Understanding the coagulation mechanism and floc properties induced by Fe（VI）and FeCl₃:population balance modeling[J]. Water Science and Technology，2021，83（10）:2377-2388.
[23]	JOSHI D R，ZHANG Y，GAO Y X，et al. Biotransformation of nitrogen-and sulfur-containing pollutants during coking wastewater treatment:correspondence of performance to microbial community functional structure[J]. Water Research，2017，121:338-348.
[24]	CHEN A C，GUAN X H，PANG Z J，et al. Function and direction of cyanide in coking wastewater:from water treatment to environmental migration[J]. ACS ES &T Water，2023，3（12）:3980-3991.
[25]	CHEN Y，LI Z M，QIU G L，et al. The process selection and the mechanism of ozonation-coagulation-adsorption for post-physicochemical treatment of coking wastewater bio-effluent[J]. Acta Scientiae Circumstantiae，2022，42（11）:1-11. 陈颖，李泽敏，邱光磊，等. 焦化废水后物化处理的臭氧-混凝-吸附原理选择与协同机制[J]. 环境科学学报，2022，42（11）:1-11.
[26]	WEI C，WU H P，KONG Q P，et al. Residual chemical oxygen demand（COD）fractionation in bio-treated coking wastewater integrating solution property characterization[J]. Journal of Environmental Management，2019，246:324-333.