温度对好氧颗粒污泥形成和稳定的影响  

Effect of Temperature on Formation and Stability of Aerobic Granular Sludge

作　　者：杨欣 李志华[2] 谭周权 

机构地区：[1]甘肃建筑职业技术学院环境与市政工程系,甘肃兰州730050 [2]西安建筑科技大学环境与市政工程学院,陕西西安710055 [3]兰州市城市建设设计院,甘肃兰州730050

出　　处：《中国给水排水》2014年第1期10-13,17,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50708089);陕西省自然科学基金资助项目(2009JQ7002)

摘　　要：采用三个序批式反应器（SBR）进行平行试验，分析了进水温度、反应器温度及曝气温度对颗粒污泥的大小、粒径分布及圆度的影响。反应器R1的温度变化范围为25～28℃，R2与R3采用水浴控制温度为（23±2）℃，结果显示R1中颗粒形成快、粒径大（1152.2～2385.5 μm），但不规则且结构较为疏松；三个反应器在后期均出现了颗粒解体。反应器温度对颗粒形成和稳定的影响要大于进水温度的影响，夏季较高的曝气温度（27～31℃）是颗粒难以形成和稳定的主要原因。夏季运行时，曝气温度高于反应器温度会强化颗粒的空间非平衡生长，加剧颗粒内部的空洞化，不利于颗粒的生长。The effects of feeding, reactor and aeration temperatures on the characteristics of aerobic granules in terms of particle size, size distribution and roundness were investigated using three sequencing batch reactors （SBRs） with different temperature controls. The temperature of R1 was in the range of 25 to 28℃, and the temperatures of R2 and R3 were controlled at （23 ± 2） ℃ with water bath. In R1, granules were formed more quickly with bigger size （ 1 152.2 to 2 385.5 μm） but irregularity and with loose structure. However, granules in all reactors disintegrated at the end of this study. The reactor temperature affected formation and stability of granules more significantly than the feeding temperature, and the relatively high temperature （27 to 31℃） of air during summer accounted for difficult formation and instability of granules. When the temperature of air pumped into the reactor was too high for biomass in the reactor, the unbalanced growth of microorganisms on the surface and inside of granules was in- creased, which resulted in more voids inside granules, and consequently affected the growth of granules.

关 键 词：颗粒污泥 粒径分布 水浴 恒温室 温度 

分 类 号：X703[环境科学与工程—环境工程]