摘要
国家“双碳”战略背景下,环境治理技术的绿色可持续性变得更为重要,而生物污泥好氧堆肥处理技术的绿色可持续性评价鲜有报道。基于生命周期评价软件eFootprint和国内典型污水处理厂生物污泥好氧堆肥技术案例数据,从环境影响角度评价了其绿色可持续性,并提出了改进建议。结果表明:(1)秸秆是初级能源消耗量(PED)、矿物资源消耗潜势(ADP)、水资源消耗量(WU)、臭氧消耗潜势(ODP)、竞争性土地利用(CLU)、酸化潜势(AP)、富营养化潜势(EP)、可吸入无机物量(RI)、光化学臭氧合成潜势(POFP)等9项生命周期评价指标的最主要贡献因子(贡献率为49.06%~99.95%);废液是人体非致癌毒性(HTnc)和人体致癌毒性(HTc)的最主要贡献因子(贡献率为81.09%~82.47%);全球增温潜势(GWP)的主要贡献因子依次是钙镁磷肥(贡献率31.10%)、麦麸(贡献率30.68%)和废液(贡献率18.18%)。(2)决定生物污泥好氧堆肥处理技术绿色可持续性的主要环境影响指标由大到小依次为ADP、PED、CLU、EP、RI、光化学臭氧合成潜势(POFP)、HTnc、HTc,它们的环境影响总贡献率分别为110.36%、103.25%、99.97%、97.65%、94.90%、93.29%、92.94%、92.63%。(3)可从降低秸秆和麦麸添加比例、少添加或不添加钙镁磷肥、加大废液循环再利用水平、减少废液排放等角度进一步提升生物污泥好氧堆肥处理技术的绿色可持续性。研究结果对改善生物污泥好氧堆肥处理技术的绿色可持续性具有一定的理论贡献和技术参考价值。
Under the background of the national“dual carbon”strategy,the green sustainability of environmental treatment technologies becomes extremely important.Green sustainability evaluation of biological sludge aerobic composting technology is still rarely reported.Based on the life cycle assessment software eFootprint and the typical case data of biological sludge aerobic composting technology of a sewage treatment plant in China,this paper evaluated its green sustainability from the perspectives of environmental impact,and put forward suggestions for improvement.Results showed that:(1)straw was the most important contribution factor of 9 life cycle assessment indexes,including priority energy demand(PED),mineral resources consumption potential(ADP),water consumption demand(WU),ozone depletion potential(ODP),competitive land use(CLU),acidic potential(AP),eutrophication potential(EP),inorganic intake amount(RI),photochemical ozone synthesis potential(POFP)(contribution rates 49.06%-99.95%);waste liquid was the most important contribution factor of human non-cancer toxicity(HTnc)and human cancer toxicity(HTc)(contribution rates 81.09%-82.47%).The main contribution factors of global warming potential(GWP)were calcium-magnesium-phosphorus fertilizer(contribution rate 31.10%),wheat bran(contribution rate 30.68%)and waste liquid(contribution rate 18.18%).(2)The main environmental impact indexes determining green sustainability of biological sludge aerobic composting technology were ADP,PED,CLU,EP,RI,POFP,HTnc and HTc in descending order,and their total contribution rates were 110.36%,103.25%,99.97%,97.65%,94.90%,93.29%,92.94%and 92.63%,respectively.(3)The green sustainability of biological sludge aerobic composting technology can be further improved by reducing the proportion of straw and wheat bran,adding less or no calcium-magnesium-phosphorus fertilizer,increasing recycling of waste liquid and reducing emissions.The results of this study will have certain theoretical contribution and technical reference value for improving the green sustainability of biological sludge aerobic composting technology.
作者
史涛
原慧聪
桑义敏
籍龙杰
刘畅
周冰雨
杨婷玉
朱玲
SHI Tao;YUAN Huicong;SANG Yimin;JI Longjie;LIU Chang;ZHOU Bingyu;YANG Tingyu;ZHU Ling(Department of Environmental Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617;Lijin Ecological Environment Monitoring Center of Dongying Ecological Environment Bureau,Dongying Shandong 257400;Beijing Construction Engineering Environmental Remediation Co.,Ltd.,Beijing 100015)
出处
《环境污染与防治》
北大核心
2025年第8期115-121,共7页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2018YFC1802100)。
