Nghiên cứu loại bỏ bod và cod trong nước thải dệt nhuộm bằng quá trình keo tụ sử dụng Chitosan và Bentonit
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sucnv@hcmute.edu.vnKeywords:
chitosan, hỗn hợp chitosan – bentonite, nước thải dệt nhuộmAbstract
Coagulation process by using chitosan and mixture of chitosan and bentonite was stud- ied to apply in textile wastewater treatment. The range of pH values for coagulation was 6.5 to 7.0 and chitosan dose was 40 g per m3 of wastewater . When using chitosan alone as a coagulant, COD and BOD5 values in textile wastewater were reduced more than 98%. Use of chitosan along with bentonite which is a coagulant aid, the obtaining values of COD and BOD5 were remarkably reduced. At 1:16 ratio by v/v of chitosan and bentonite respectively, more than 99% COD and BOD5 were removed
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