不同含固率污泥热水解后厌氧消化特性及有机物转化  

Technological Property and Organics Transformation Characteristics of Thermal Hydrolysis Pretreated Sludge under Different Solid Contents during Anaerobic Digestion

作　　者：韩芸[1] 卓杨[1] 彭党聪[1] 宜慧 宋小文 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]陕西省轻工业研究设计院,陕西西安710054 [3]西安益维普泰环保股份有限公司,陕西西安710077

出　　处：《中国给水排水》2017年第23期33-38,共6页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51408458);国家水体污染控制与治理科技重大专项(2013ZX07315-001-04);陕西省科技统筹创新工程计划项目(2016KTZDSF04-02-02);陕西省自然科学基金资助项目(2017JM5090)

摘　　要：以城市污水处理厂初沉污泥、混合污泥及脱水污泥为对象,研究不同含固率污泥经热水解后的厌氧消化特性及其有机物转化规律。结果表明,热水解后高含固污泥的中温厌氧消化甲烷产率最高(291.8 m L/g VS),其次为热水解后常规初沉污泥高温厌氧消化(272.3 m L/g VS)。各工艺条件下未经热水解预处理的污泥厌氧消化水解率(32%~37%)均低于热水解后的水解率(52%~56%),有机物水解仍是未经预处理高含固污泥厌氧消化过程的限速步骤,是厌氧消化工艺改进的主要目标。水解污泥中有机物可快速、高效降解,热水解预处理可有效加速后续甲烷化进程。经综合考虑,高含固污泥经过热水解预处理后的中温厌氧消化性能最优,可作为城市污水处理厂污泥处理的首选工艺。Anaerobic digestibility and transformation characteristics of primary sludge, waste acti- vated sludge and dewatering sludge were investigated. Results showed that the methane production rate of high solid THP- MAD and conventional THP- TAD were 291.8 mL/gVS and 272.3 mL/gVS, respec- tively. The hydrolysis ratio of unpretreated and pretreated high solid AD ranged from 32% - 37% and 52% -56%, respectively, and the hydrolysis was still the rate-limiting step of unpretreated high solid anaerobic digestion. The improvement objective of the anaerobic digesti of organics hydrolysis in the sludge. The acceleration of methanogenesis organic after thermal pretreatment. With the highly performance of high on process was the enhancement was because of the hydrolysis of solid THP- MAD process, it isthe first choice of WWTP sludge treatment.

关 键 词：高含固污泥 热水解预处理 厌氧消化 工艺比较 污泥稳定化 

分 类 号：X703[环境科学与工程—环境工程]