Online First

Carbon emissions and efficiency characteristics of high-standard processes for semiconductor chip wastewater

Received Date:2024-10-18 Revised Date:2024-12-23 Accepted Date:2024-12-30

DOI:10.20078/j.eep.20250105

Abstract:To effectively promote the green and low-carbon transformation of the wastewater treatment industry, it is of utmost imp... Open+
Abstract:To effectively promote the green and low-carbon transformation of the wastewater treatment industry, it is of utmost importance to carry out accurate calculations of carbon emissions from wastewater treatment processes. In this regard, electricity consumption stands out as the major source of carbon emissions. During the wastewater treatment procedures, various electrical devices and equipment are in operation, such as pumps for water circulation, aeration devices for oxygen supply, and monitoring instruments. All of these consume a significant amount of electricity, which in turn leads to substantial carbon emissions. This study adopted the emission factor method recommended by the Intergovernmental Panel on Climate Change (IPCC) to calculate the carbon emissions of typical chip wastewater treatment processes and explored the composition of carbon emissions at different treatment stages and their influencing factors. The results showed that the carbon emissions of chip wastewater treatment processes are generally higher than those from municipal wastewater treatment processes. The carbon emission intensities of seven typical chip wastewater treatment processes (A to G) were 2.20, 2.32, 2.85, 2.58, 2.72, 3.69, and 2.39 kg CO2e/m3, respectively. Among these, with relatively small differences in carbon emission intensity, process G had the lowest carbon emissions of 1.2×104 kg CO2e/d. Its direct methane, nitrous oxide, indirect electricity consumption, and chemical consumption emissions were 3 309.3, 2 893.8, 3 733.4, and 2 520.7 kg CO2e/d, respectively, with indirect electricity consumption accounting for the highest proportion at 30%. In comparison, process G achieved an average reduction of 10%, with a maximum reduction of 35%. Taking the 5 200 m3/d chip wastewater treatment project from an electronics company in Guangdong Province as an example, process G aims to effectively address the challenges of fluoride and organic carbon/nitrogen treatment as well as carbon emission control, ensuring that the effluent water quality meets the Class Ⅲ standard of the Surface Water Environmental Quality Standard (GB 3838—2002). In addition, the carbon emission intensities per unit of land for process A and G are 0.71 and 1.93 kg CO2e/m2, respectively, and process G has a high land utilization rate and efficient wastewater treatment. As a result of this study, after in-depth investigation and analysis, the application of new energy utilization models and process optimization methods in the treatment of chip wastewater can significantly reduce energy consumption and thus carbon emissions, helping to promote the development of the industry in a greener and more sustainable direction. Close-

Authors:

  • LIANG Xingmei1
  • LIU Ke2
  • CAI Zhenshan3
  • HUANG Chongqing4
  • WU Qianyuan1
  • WANG Wenlong1,*

Units

  • 1.  Key Laboratory of Microorganism Application and Risk Control of Shenzhen, Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Tsinghua Shenzhen International Graduate School
  • 2.  Central & Southern China Municipal Engineering Design and Research Institute Co., Ltd.
  • 3.  Shenzhen Changlong Technology Co., Ltd.
  • 4.  Waterworks Construction Management Centre, Shenzhen Pingshan District Water Affairs Bureau

Keywords

  • Chip wastewater
  • Carbon emission reduction
  • Carbon emission accounting
  • Emission factors
  • Pollution and carbon reduction

Citation

LIANG Xingmei, LIU Ke, CAI Zhenshan, HUANG Chongqing, WU Qianyuan, WANG Wenlong. Carbon emissions and efficiency characteristics of high-standard processes for semiconductor chip wastewater[J/OL]. Energy Environmental Protection: 1-9[2025-01-08].https://doi.org/10.20078/j.eep.20250105.

Add: No.288, Gongxiu Road, Xiaoshan District, Hangzhou City, Zhejiang Province.
Post Code: 311201
Tel: 0571-82989702, 19558121964
E-mail: office@eep1987.com
Website Copyright © Editorial Department of Energy Environmental Protection 京ICP备05086979号