摘要
为开发利用剩余污泥消化液中的有机物,向污泥自热高温微氧消化(ATMAD)体系投加不同量的AlCl_(3)·6H_(2)O,研究Al^(3+)对该体系内有机物、挥发性脂肪酸(VFA)及氨氮、磷酸盐释放的影响.结果表明,消化体系内存在的Al^(3+)抑制了有机物的分解转化,改变了污泥消化液中有机组分的含量与构成.对照组中VFA的最大产量是Al^(3+)浓度为1.0g/L的实验组VFA产量的6.9倍.消化结束后Al^(3+)浓度为1.0g/L的体系内NH_(4)^(+)-N浓度为502.06mg/L,而对照组中NH_(4)^(+)-N浓度仅为334.41mg/L.Al^(3+)也降低了体系内微生物活性.消化体系中存在的Al^(3+)不利于活性污泥ATMAD体系的产酸与稳定化,在污泥ATMAD体系中应避免引入过多的Al^(3+),以保证消化体系能够充分产酸,释放有机物,为污水处理生物脱氮提供优质碳源.
In order to exploit and use the organic matter in the fermentation liquid,the study added various dosage of AlCl_(3)·6H_(2)O to the sludge digestion system which using the technology of Autothermal Thermophilic Micro-Aerobic Digestion(ATMAD),the thesis discussed about the impacts of aluminum ions(Al^(3+))on transformation rule of organic substance,volatile fatty acid(VFA),ammonia nitrogen(NH_(4)^(+)-N)and orthophosphate(PO_(4)^(3-)-P)in the course of ATMAD.The results promoted that the conversion and degradation of organic substance was inhibited,meanwhile,the content and composition of dissolved organic substance in sludge digestion solution was changed when Al^(3+)was existing in the system of ATMAD.The maximum production of VFA in contrast group was 6.9 multiple than experimental group with the concentration of Al^(3+)was 1.0g/L.When the process of ATMAD digestion ended,the concentration of NH_(4)^(+)-N was 502.06mg/L in the reactor which the concentration of Al^(3+)was 1.0g/L,in the contrast group the concentration of NH_(4)^(+)-N just was 334.41mg/L.The activity of microorganisms declined when Al^(3+)present in the system of ATMAD.It can be concluded that Al^(3+)have negative impacts on sludge digestion and stabilization.It’s advisable to avoid adding excessive aluminum ions in sludge ATMAD system to ensure the digestion system can fully produce acid and release organic substance,which will be used as high-quality carbon for biological nitrogen removal.
作者
刘奕伟
高春娣
毕豪华
欧家丽
邢一言
彭永臻
LIU Yi-wei;GAO Chun-di;BI Hao-hua;OU Jia-li;XING Yi-yan;PENG Yong-zhen(National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology,Engineering Research Center of Beijing,Beijing University of Technology,Beijing 100124,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2023年第7期3481-3488,共8页
China Environmental Science
基金
国家自然科学基金资助项目(52270017)。
关键词
剩余污泥消化液
有机物
ATMAD
微生物
Al^(3+)
digestion liquid of waste activated sludge
organic substance
ATMAD
microorganisms
aluminum ions(Al^(3+))
