Toxicity and toxicity emission load of reed pulp CEH bleaching effluents
The toxicity of CEH bleaching effluents was studied with photobacteria. The toxicity of C stage was the strongest, its EC_ 50 was 17.39%, belonging to the strongest toxicity level. The EC_ 50 of E, H stages were 163.6% and 252.4% respectively. Both belonging to the no toxicity level. The total toxicity emission factor(TEF) of CEH was 472.021 TU·m3·t -1.The TEF of C stage was 393.88 TU·m3·t -1, about 83.45% of the total toxicity emission factor. The TEF of E and H stages was 10.03% and 6.52% respectively.