硫氧化菌在再生水环境中对水泥材料的腐蚀研究

Research on Corrosion of Cement Materials from Oxidation Sulfur Bacteria in Renewable Water

再生水运输过程中管材的微生物腐蚀问题普遍存在,这已成为必然解决的现实问题.本试验选用硫氧化菌(那不勒斯硫杆菌)作为典型菌种,研究其生理生化特征,并分别接种5%、8%、12%和15%的硫氧化菌菌液到再生水中观察生长状况;采用阳离子交换树脂对再生水中硫氧化菌的胞外代谢产物进行提取测定;接种8%硫氧化菌至再生水中考察对水泥材料的腐蚀程度.结果表明:那不勒斯硫杆菌为短杆状,革兰氏阴性菌;硫氧化菌接种量为8%时,再生水中菌液浓度总体大于5%、12%和15%;硫氧化菌的接种量为8%时蛋白质和多糖的含量均大于5%;水泥材料的失重量和失重率均随着时间先增大后减小,失重量最大值达到0.23,失重率的最大值为0.01.

Microbial corrosion problem is widespread in the process of reclaimed water transportation , and has become a practical problems which need necessarily solving. This test strains of Halothiobacillus neapolitanus chosen as the representative have studied the physiological and biochemical characteristics. We inoculate 5% , 8% , 12% and 8% bacterium liquid respectively into the renewable water and observe the growth curve by using cation exchange resin to extract extracellular metabolites of renewable water sulfur oxidizing bacteria. We review corrosion degree of cement material which is inoculated with 8% sulfur oxidizing bacteria in reclaimed water. Results show that the Halothiobacillus neapolitanus is short rod and gram-negative bacteria. Bacteria concentration in renewable water is general more than 5%, 12% and 15% when Sulfur oxidizing bacteria inoculation quantity is 8%. The content of protein and polysaccharide are greater than 5% when Sulfur oxidizing bacteria inoculation quantity is 8%. Lose weight and weight loss rate of cement material as time goes by after the first decreases, and the maximum value is 0.23, while the minimal value is 0.01 respectively.