給水管道論文：給水管道的微生物腐蝕

1、給水管道論文：給水管道的微生物腐蝕【中文摘要】在給水管道中,腐蝕是影響給水管道壽命,降低飲用水安全的一個(gè)重要隱患。其中,微生物的腐蝕是導(dǎo)致給水管道腐蝕的重要影響因素,在導(dǎo)致給水管道腐蝕的微生物中,又以自養(yǎng)需氧型鐵細(xì)菌(IRB和異樣厭氧型硫酸鹽【英文摘要】Corrosion in drinking water distribution systems has become one of the causes of drinking water pollution and the decrease of durable years of water distribution pipes. Amon

2、g the processes of corrosion in water pipes, microbiologically influenced corrosion(MIC is of significant importance. This paper includes the study on the two most characterized corrosion related bacteria, iron bacteria(IRB and sulfate-reduced bacteria(SRB in drinking water distribution systems.In t

3、his paper, SRB and IRB, which were gained from drinking water distribution pipe in Harbin and purified with solid mediums in the laboratory, there were lots of IRB and a small amount of SRB existing in the corrosion products of water distribution systems. The results indicated that cast iron pipelin

4、es without coating had already been corroded after the serving of 10 years. Coupon tests were implemented to compare the growth condition of the two kinds of bacteria. MPN method was applied to measure the growth rates in one experimental period. Using these two kinds of bacteria, the effect of micr

5、obiologically influenced corrosion on water supply pipes was studied applying electrochemical techniques and weight-loss method in static coupon tests. Most probable number method was also used to obtain the actual number of SRB and IRB in a corrosion test period. The result showed that the corrosio

6、n rate of iron pipe samples decreased in a mixed bacteria environment.Based on the previous research, the disinfection efficacy of bacteria was studied in order to improve the water quality as well as to decrease the corrosion process. The results showed that, the disinfection efficacy could reach 9

7、0% after the contact of 100 mins when the concentration of residual chlorine was up to 0.2mg/L. However, it was considered to be effectively disinfected as long as the initial concentration of 1.00mg/L for IRB whereas the initial concentration of 0.20mg/L for SRB. When the residual chlorine was unde

8、r 0.5mg/L, the growth of SRB and IRB could not be controlled effectively as the actual number of IRB in the corrosion product of water supply system was up to 108cfu/ml, hence high residual chlorine should be maintained in pipe cleaning and repairing techniques.【關(guān)鍵詞】給水管道 微生物腐蝕 鐵細(xì)菌 硫酸鹽還原菌 余氯【英文關(guān)鍵詞】mi

9、crobiologically influenced corrosion sulfate-reduced bacteria iron bacteria chlorine residual【目錄】給水管道的微生物腐蝕摘要3-4Abstract4第1章 緒論8-201.1 課題背景及研究的目的和意義給水管道腐蝕與飲用水安全給水管道的腐蝕種類81.2 給水管道的電化學(xué)腐蝕給水管道的電化學(xué)腐蝕機(jī)理91.3 給水管道的微生物腐蝕微生物腐蝕機(jī)理給水管道中引起腐蝕的微生物影響給水管道微生物腐蝕的因素11-141.4 研究給水管道微生物腐蝕的方法靜態(tài)試驗(yàn)動(dòng)態(tài)試驗(yàn)腐蝕速率15-171.5 給水管道防止微生物腐蝕

10、的方法以及管道沖洗給水管道防止微生物腐蝕方法管道沖洗和修復(fù)17-181.6 微生物的滅活18-191.7 本課題主要研究內(nèi)容19-20第2章 實(shí)驗(yàn)方法20-252.1 腐蝕試驗(yàn)準(zhǔn)備腐蝕實(shí)驗(yàn)試片材料及制備管道內(nèi)細(xì)菌取樣202.2 微生物實(shí)驗(yàn)方法常用設(shè)備基本儀器微生物實(shí)驗(yàn)基本方法腐蝕試驗(yàn)基本方法腐蝕速率的測(cè)定23-25第3章 給水管道微生物提取及分離純化25-323.1 給水管道微生物提取253.2 液體稀釋法細(xì)菌數(shù)量統(tǒng)計(jì)鐵細(xì)菌數(shù)量統(tǒng)計(jì)硫酸鹽還原菌數(shù)量統(tǒng)計(jì)26-273.3 細(xì)菌的分離純化鐵細(xì)菌的分離純化硫酸鹽還原菌的分離純化29-303.4 結(jié)論30-32第4章 微生物對(duì)給水管道管材腐蝕的靜態(tài)試驗(yàn)32-534.1 靜態(tài)試片分析步驟3