Effect of the dosage of Shaoyang Zhengda powdered activated carbon on the treatment effect

When the dosage of powdered activated carbon is less than 20mg/L, the odor of effluent is higher. This is because the organic matter in the water occupies the adsorption space of the powdered activated carbon, so that the olfactory substance cannot be completely adsorbed. The negative charge of powdered activated carbon can have adverse effects on coagulation, especially when the amount of powdered activated carbon is low, the turbidity in the water will increase, and the coagulation effect will be worse, resulting in an increase in the olfactory value of the water. When the dosage of powdered activated carbon is increased from 20 mg/L to 50 mg/L, the increased adsorption space of the powdered activated carbon correspondingly adsorbs the remaining olfactory substance, thereby gradually reducing the olfactory value of the effluent. After that, the dosage of powdered activated carbon is continuously increased. Since the adsorption amount has reached saturation, the effect of reducing the olfactory value of the effluent is not obvious.
When potassium permanganate is combined with powdered carbon, the dosage of powdered activated carbon is changed under the condition of 0.5 mg/L potassium permanganate, and when the dosage of powdered activated carbon is 20 mg/L. The odor of effluent is 25; when the dosage of powdered activated carbon is increased to 40mg/L, the odor of effluent is reduced to 5 and there is no odor, which is far better than the deodorization effect of potassium permanganate pre-oxidation and powdered activated carbon adsorption. Under the premise of ensuring that the effluent threshold is less than 10, the combination of powdered activated carbon and potassium permanganate can reduce the amount of powdered activated carbon by about 20% compared with the addition of activated carbon alone.

Conclusion, but when the odor threshold of raw water is large (>90), the dosage of powdered activated carbon needs to be increased to 40mg/L, and the odor threshold of effluent can reach 7 without odor and odor, meeting the national drinking water quality standard. . In practical applications, taking into account that the filter can remove a part of the smell and economy, the dosage of powdered activated carbon will be reduced.

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