摘要
传统的污水处理需要消耗大量的能耗换取清洁水,已是不可持续的处理方法。污水本身具有良好的资源化潜力,客观上污水中蕴含着大量有机物,转化为可利用资源。在双碳背景下,从污水中提取能源已成当前污水处理行业的热点。采用厌氧膨胀颗粒污泥反应器处理污水预处理浓缩碳源水解液,产生可利用的沼气。根据能源估算,当前污水厂进水低COD情况下,污水预浓缩碳源通过甲烷回收能量占污水处理能耗的61.8%,不能达到污水厂碳中和的目的;污水预浓缩碳源与餐厨垃圾协同厌氧消化,不仅能够实现污水厂碳中和,还可以向厂外输出额外的能量。市政污水预处理碳源浓缩-碳源水解-EGSB路线是完全可行的,是实现污水处理碳中和的重要途径,可为国家减污降碳协同增效贡献行业重要力量。
Traditional sewage treatment that needs to consume a lot of energy in exchange for clean water,has become an unsustainable treatment method.Sewage itself has a good resource potential.Objectively,sewage contains a lot of organic matter,which can be converted into available resources.Under the background of“3060”plan,extracting energy from sewage has become a hot topic in the current sewage treatment plant.The anaerobic expanded granular sludge reactor(EGSB)was used to treat the hydrolysate of carbon source from the wastewater pretreat and concentrate to produce usable biogas.According to the energy estimation,under the condition of low COD in the effluent,the energy recovery of pre-concentrated carbon source through methane accounted for 61.8%of the energy consumption of wastewater treatment cost,which could not achieve the goal of carbon neutrality in the wastewater plant.The collaborative anaerobic digestion of wastewater preconcentrated carbon source and food waste can not only achieve carbon neutrality of wastewater plant,but also output additional energy to the society.The route of municipal sewage pretreatment of carbon source concentration,carbon source hydrolyzation and EGSB is completely feasible.It is an important way to achieve carbon neutrality in sewage treatment,and can contribute an important industry strength to the national synergistic effect of pollution reduction and carbon reduction.
作者
王启镔
刘越
常风民
林甲
宋新新
王凯军
WANG Qibin;LIU Yue;CHANG Fengmin;LIN Jia;SONG Xinxin;WANG Kaijun(State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China;Beijing Capital Eco-Environment Protection Group Co Ltd,Beijing 100044,China)
出处
《中国沼气》
CAS
2023年第3期20-26,共7页
China Biogas
基金
国家水体污染控制与治理科技重大专项(2017ZX07102-003)。
关键词
污水预处理
浓缩碳源
水解
EGSB
能源回收
wastewater pretreatment
carbon source concentrate
hydrolysis
EGSB
energy recovery
