Domestication of salt-tolerant sludge by biochemical treatment of salty industrial wastewater and its mechanism
Bottle Brush,Bottle Cleaning Brush,Silicone Bottle Brush,Bottle Washing Brush Zhejiang Carebao Co., Ltd , https://www.carebao.com
By comparing the acclimation process of activated sludge under high and low salt conditions, this study investigated the feasibility, characteristics, and biological mechanisms involved in the biochemical treatment of saline wastewater using salt-tolerant sludge. The findings demonstrated that salt-tolerant sludge with high degradation capacity could be effectively cultivated by applying salt as a selective pressure. At a NaCl concentration of 45,000 mg/L and a volumetric loading rate of 1.6 kg CODCr/m³·d, the CODCr removal efficiency reached as high as 96.6%. Furthermore, the analysis of microbial community dynamics during the acclimation process revealed that the number of salt-tolerant phenylacetic acid-degrading microbial groups increased significantly, rising from 10⹠to 10¹¹ cfu/gVSS within 15 days. This indicated that these microorganisms became the dominant physiological group in the sludge as the salinity increased. These results highlight the potential of using salt-tolerant sludge for efficient wastewater treatment in high-salinity environments, offering a promising approach for industrial and municipal wastewater management.