天山胜利隧道隧址区污水处理全过程碳排放特征和碳减排模式研究  

Study on the Carbon Emission Characteristics and Carbon Emission Reduction Model in the Sewage Treatment Process in the Tianshan Shengli Tunnel Construction Area

作　　者：尹严 包卫星[1] 卢汉青 张智勇 车博文 潘振华[1] 林旭辉 YIN Yan;BAO Weixing;LU Hanqing;ZHANG Zhiyong;CHE Bowen;PAN Zhenhua;LIN Xuhui(School of Highway,Chang'an University,Xi'an 710064)

机构地区：[1]长安大学公路学院,西安710064

出　　处：《现代隧道技术》2023年第6期58-67,共10页Modern Tunnelling Technology

基　　金：新疆重大科技专项(2020A03003-7);陕西省自然科学基础研究计划面上项目(2021JM-180);中央高校基本科研业务费资助项目(领军人才计划)(300102211302).

摘　　要：为揭示超长隧道建设过程中污水处理全过程碳排放特征,以乌鲁木齐至尉犁段天山胜利隧道隧址区污水处理为例,采用全生命周期法、过程分析法、污染物参数归一化方法,建立污水处理全过程新型混合生命周期碳排放计算模型。根据污水处理工艺流程碳排放足迹,将污水处理全过程产生的碳排放分为直接排放和间接排放,并进行定性、定量分析。结果表明:2021—2022年天山胜利隧道隧址区污水处理全过程总碳排放量为4242.43 tCO_(2)eq,排放量强度约为1.17 kgCO_(2)eq/t;其中,电耗、去除BOD5、物耗、去除TN、污泥外运处置等过程碳排放量占比分别为85.3%、11%、2.1%、1%、0.6%;通过提升出水水质标准、污泥再利用为土壤肥料开展节能减排,年均碳排放量下降约15.6%,碳减排效益明显。In order to reveal the carbon emission characteristics in the sewage treatment process during construction of super-long tunnel,the sewage treatment process in the construction area of Tianshan Shengli Tunnel of Urumqi-Yuli Expressway is used as an example in this study,and the full life cycle method,process analysis method and pol⁃lutant parameters normalization method are used to create the new hybrid life cycle carbon emission calculation model for the sewage treatment process.Depending on the carbon emission footprint in the sewage treatment pro⁃cess,the carbon emission generated in the sewage treatment process is classified into direct emission and indirect emission,and its qualitative analysis and quantitative analysis have been conducted.The results indicate:in 2021~2022,the total carbon emission generated in the sewage treatment process in the construction area of Tianshan Shengli Tunnel was 4242.43 tCO2eq,and the emission intensity was approx.1.17 kgCO2eq/t;among the total carbon emission,the processes including electricity consumption,removal of BOD5,materials consumption,removal of TN and sludge transportation/disposal account for 85.3%,11%,2.1%,1%and 0.6%respectively;by raising the quality standard for outlet water and using the sludge as fertilizer for soil for the purpose of energy conservation and emission reduction,the annual average carbon emission is reduced by approx.15.6%,which brings about significant carbon emission reduction.

关 键 词：特长隧道 碳排放 污水处理 碳排放特征 碳减排潜力 

分 类 号：U455[建筑科学—桥梁与隧道工程]