源分离生活污水对污水处理厂碳排放的影响

Influence of Source Separation Domestic Sewage on Carbon Emission of Sewage Treatment Plant

以已建成运行的半集中式分质供排水和资源化系统为研究对象,研究分类排水系统对碳排放的影响,以期为污水处理厂碳减排提供新的思路和参考。结果表明:黑水和灰水处理系统碳排放量均以电类碳排放量为主,分别占各自碳排放量的47.9%和58.1%。黑水处理系统碳排放量比灰水处理系统高40.8%,在采用再生水回用及污泥厌氧回收CH_(4)等措施后,可使得黑水处理系统碳排放总量比灰水处理系统低12.5%。分质供排水系统污水吨水碳排放量为2.81 kgCO_(2)eq·t^(-1),高于混合排放、统一处理模式下的吨水碳排放量。因此,为提高源分离的效果和资源的利用效率,降低污水处理碳排放量,应进一步加强和完善设计、建设、管理和维护各环节的协调和监管。

A semi-centralized decentralized water supply and drainage and recycling system that had been built and operated as the research object was studied to analyze the impact of classified drainage system on carbon emissions.The results showed that the carbon emissions of black water and gray water treatment systems were mainly electrical carbon emissions,accounting for 47.9%and 58.1%of their carbon emissions,respectively.The carbon emission of black water treatment system was 40.8%higher than that of gray water.After several measurements such as recycle of reclaimed water and anaerobic recovery of CH_(4) from sludge being taken,the total carbon emission of black water treatment system was 12.5%lower than that of gray water.The carbon emission per ton of sewage in this system was 2.81 kgCO_(2) eq·t^(-1),which was higher than that of sewage under the mixed discharge and unified treatment mode.In order to improve the effect of source separation,the utilization efficiency of resources,and reduce the carbon emissions of sewage treatment,the coordination,supervision,design,construction,management and maintenance all should be further strengthened and improved.