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| Life Cycle Assessment of Papermaking Wastewater Biochemical Treatment Process Based on Dissolved Oxygen Control |
| Received:May 15, 2025 Revised:June 06, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.09.013 |
| Key Words:papermaking wastewater treatment life cycle analysis dissolved oxygen control |
| Fund Project:国家重点研发计划项目（2022YFF0607201）；先进造纸与纸基材料全国重点实验室自主研究课题（2024ZD08）。 |
| Author Name | Affiliation | Postcode | | DENG Yuxuan* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | ZHANG Zhuoran | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 | | SHEN Wenhao* | State Key Lab of Advanced Papermaking and Paper-based Materials, South China University of Technology, Guangzhou, Guangdong Province, 510640 | 510640 |
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| Abstract:This study based on the BSM2-G simulation model， took the dissolved oxygen concentration in the papermaking wastewater treatment process as the control variable， and employed a life cycle assessment to evaluate the environmental impacts of six different control cases. The results showed that increasing the dissolved oxygen setpoint could improve effluent quality， but the resulting increased in aeration electricity consumption leaded to higher global warming potential （1.86×104~2.07×104 kg CO2eq） and human toxicity potential（1.71×103~2.69×103 kg DCB eq）， causing the total environmental impact to initially decrease and then rise. However，by adjusting the dissolved oxygen concentration and optimizing control algorithms， the overall environmental impact could be effectively reduced by 15.2% and 0.54% respectively. |
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