化工学报2011，Vol.62Issue(12)：3503-3510,8.DOI:10.3969/j.issn.0438-1157.2011.12.030
基于模拟循环冷却装置的微生物污垢形成的影响因素
Factors affecting microbial fouling formation in simulated recirculating cooling-water system
摘要
Abstract
A slime-forming bacterial strain N1 was isolated and purified from the Songhua River. According to the morphological observation as well as the physiological and biochemical indexes, the strain was identified as Micrococcus. Under certain experimental condition (water temperature 30℃ , flow velocity 0. 4 m ·s-1 and microorganism concentration between 7. 0 × 106 cfu ·ml-1 and 2. 2 × 1010 cfu · ml-1 ), the fouling resistance was monitored online in an experimental device for dynamic simulation of forming fouling, and the heat transfer characteristics were analyzed. The induction period of microbial fouling in the stainless steel tube was about 57 h, which was shorter than that in the copper tube. In the contrast experiment with converging-diverging tube, it was found that flow velocity had certain influence on the formation of microbial fouling. The change of flow velocity could prolong the induction period of microbial fouling. During the dynamic experiment, many water quality parameters including pH, conductivity, total bacterial count, total nitrogen and COD were detected periodically. Based on the grey relational algorithm, the correlation for water quality parameters and microbial fouling was analyzed, which provides a theoretical basis for predicting the microbial fouling and selecting the effective measures for scale removal.关键词
微生物污垢/污垢热阻/模拟循环冷却装置/黏液形成菌/水质参数Key words
microbial fouling/ fouling resistance/ simulated recirculating cooling device/ slime-forming bacteria/ water quality parameter分类
能源科技引用本文复制引用
于大禹,尹旭,张静,高波,王刚,曹生现,杨善让,徐志明..基于模拟循环冷却装置的微生物污垢形成的影响因素[J].化工学报,2011,62(12):3503-3510,8.基金项目
国家重点基础研究发展计划项目(2007CB206904) （2007CB206904）
吉林省科技发展计划项目(20090145). （20090145）
