Each process has its own advantages as well as disadvantages; therefore, various combinations have been attempted to achieve the efficient treatment of sulfur dye effluents. With the combination of coagulation and membrane processes, the black sulfur dye effluent is initially pretreated with aluminum sulfate and thereafter by microfiltration (MF) using a ceramic membrane. Aluminum sulfate is used as the coagulant and a polymer is used as the flocculant. The supernatant is collected after overnight setting and treated further by MF process. After 1 h, the turbidity is observed to decrease from 5912 NTU to 1.10 NTU, and COD decreases from
3910 mg L-1to 700 mg L-1. The removal values of turbidity and COD are greater than 99% and 82%, respectively, and color removal is reasonable for the effluent.
Each process has its own advantages as well as disadvantages; therefore, various combinations have been attempted to achieve the efficient treatment of sulfur dye effluents. With the combination of coagulation and membrane processes, the black sulfur dye effluent is initially pretreated with aluminum sulfate and thereafter by microfiltration (MF) using a ceramic membrane. Aluminum sulfate is used as the coagulant and a polymer is used as the flocculant. The supernatant is collected after overnight setting and treated further by MF process. After 1 h, the turbidity is observed to decrease from 5912 NTU to 1.10 NTU, and COD decreases from3910 mg L-1to 700 mg L-1. The removal values of turbidity and COD are greater than 99% and 82%, respectively, and color removal is reasonable for the effluent.
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