含盐工业废水生化处理耐盐污泥驯化及其机制

 通过比较在高盐和低盐条件下活性污泥驯化过程,研究了含盐工业废水生化处理耐盐污泥驯化的可行性、特点及其生物学过程.结果表明以盐份作为选择压力可以驯化出具有高降解活性的耐盐污泥,在NaCl浓度为45 000mg/L,容积负荷为1.6kgCODCr/(m³d)时,其COD_Cr去除率可达到96.6%.对耐盐污泥的驯化过程中的微生物优势生理群变化分析显示,随着进水盐浓度的增加,耐盐苯乙酸降解微生物生理群数量在15d时间内从10⁹cfu/(gVSS)上升到10¹¹cfu/(g.VSS),成为污泥中的优势生理群.

Industrial hypersaline wastewater biochemical treatment of salt-tolerant sludge acclimation and its mechanisms

The feasibility, character and biological process of industrial hypersaline wastewater biochemical treatment of salt-tolerant sludge acclimation were studied through comparing the activated sludge acclimation under high and low saline conditions. The result showed that taking salt as the selective pressure, salt-tolerant sludge with high degradation activity could be acclimated. When the NaCl concentration is 45 000mg/L and the volumetric loading is 1.6kgCODCr/(m3d), the CODCr removal rate could reach to 96.6%. Analysis of microbial communities in the acclimation of salt-tolerant sludge shows that the amount of salt-tolerant phenyl acetic acid-degrading bacteria increased from 109cfu/(gVSS) to 1011cfu/(gVSS) in 15 days, with increase of influent salt concentration thus becoming the dominant physiological community in the sludge.