碳中和背景下碳源捕获的污泥厌氧发酵性能

Performance of Carbon Source Capture for Sludge Anaerobic Fermentation under the Background of Carbon Neutral

在“碳中和”的可持续发展理念及自养生物脱氮工艺需低碳高氮的理想进水水质要求下,城市生活污水高效碳源捕获技术得到了快速发展,文章针对该技术捕获的碳源污泥展开厌氧发酵性能研究。结果表明,捕获碳源污泥在厌氧发酵中溶解性有机物SCOD_(Cr)降解率高达约77.70%、挥发性悬浮固体(VSS)降解率为15.26%、发酵过程中总磷(TP)质量浓度为(1.35±0.18)mg/L。此外,捕获碳源污泥发酵平均累积产气量可达到31.43 mL/(g VSS)、709.54 mL/(g SCOD_(Cr)),同时通过三维荧光光谱发现厌氧污泥能直接利用捕获碳源污泥中的碳源进行发酵。相比对照组的厌氧污泥,捕获碳源污泥具有快速发酵、高效产气和污泥减量稳定化的优势,为自养生物脱氮工艺中产生的捕获碳源污泥的处理处置及资源化利用提供了一种新思路。

Under the concept of carbon neutral and sustainable development,and autotrophic biological nitrogen removal process requires the ideal influent water quality requirements of low carbon and high nitrogen,the high efficiency carbon source capture technology of municipal domestic wastewater has been developed rapidly.This paper studies the anaerobic fermentation performance of the carbon source sludge captured by this technology.Results showed that the SCOD_(Cr) degradation rate of dissolved organic matter,volatile suspended solid(VSS)and total phosphorus(TP)mass concentration in anaerobic fermentation were about 77.70%,15.26%and(1.35±0.18)mg/L,respectively.In addition,the average cumulative gas production of captured carbon source sludge could reach 31.43 mL/(g VSS)and 709.54 mL/(g SCOD_(Cr)).At the same time,through three-dimensional fluorescence spectrum,it was found that anaerobic sludge could directly use the carbon source of captured carbon source sludge for fermentation.Compared with the control group,captured carbon source sludge had the advantages of rapid fermentation,efficient gas production and sludge reduction and stabilization.It provides a new idea for the treatment and resource utilization of carbon capture source sludge produced in autotrophic biological nitrogen removal process.