Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS 2007, Australia.
Sci Total Environ. 2020 Nov 15;743:140658. doi: 10.1016/j.scitotenv.2020.140658. Epub 2020 Jul 1.
This study aims to investigate the environmental issues regarding the construction phase of the wastewater treatment plant (WWTP) and explore the roles of different materials through their environmental impacts. Detailed inventories of the two WWTPs were conducted by involving materials and transportation for civil works undertaken. EPD 2018 and ReCiPe life cycle impact assessment methods were employed to measure all the impact categories. Five treatment processes - (1) pumping, (2) primary treatment, (3) secondary treatment, (4) sludge line, and (5) building landscape - were considered for the assessment. It was found that concrete and reinforcing steel played similarly vital roles in most of the EPD 2018 impacts. The significant score of reinforcing steel was found on human cancer toxicity, which contributed more than 90% of the impacts. The contribution of diesel on ozone formation was 5% higher than that of reinforcing steel. Glassfiber was responsible for 70% of the burdens on ozone depletion, showing much higher than the total share of concrete and reinforcing steel. Primary treatment units only contributed 9.5% of the construction impacts in the Girona WWTP but up to 43.8% in Mill Creek WWTP mainly because of the proportion of consumed materials. In short, the comprehensive data inventories were necessary when evaluating the total environmental impacts of the WWTP.
本研究旨在探讨废水处理厂（WWTP）施工阶段的环境问题，并通过其环境影响探索不同材料的作用。通过对已完成的土木工程所涉及的材料和运输进行详细清单编制，对两个 WWTP 进行了详细的评估。采用 EPD 2018 和 ReCiPe 生命周期影响评估方法来衡量所有影响类别。考虑了五个处理过程 - (1) 泵送、(2) 初级处理、(3) 二级处理、(4) 污泥线和 (5) 建筑景观 - 进行评估。结果发现，混凝土和钢筋在大多数 EPD 2018 影响中扮演着同样重要的角色。钢筋在人类癌症毒性方面的显著得分超过了 90%。柴油对臭氧形成的贡献比钢筋高 5%。玻璃纤维对臭氧消耗的负担占 70%，明显高于混凝土和钢筋的总和。在 Girona WWTP 中，初级处理单元仅占施工影响的 9.5%，但在 Mill Creek WWTP 中占 43.8%，主要是因为消耗材料的比例。简而言之，在评估 WWTP 的总环境影响时，综合数据清单是必要的。
