Objective To develop Chlorine Dioxide Disinfection powder packed in single-ingredient that is more convenient for use and transportation. Methods Orthogonal experiment was adopt to improve disinfection powder. Stability test, suspension quantitative bactericidal test, simulation field trial and toxicity test were carried out according to Technical Standard for Disinfection, 2002 edition, Experimental Technical Standard, Ministry of Health, PRC. Results[WTBZ] The results of orthogonal experiment showed that the type of water had no effect on disinfection powder and the best ratio of natrium chlorite to citric acid was 1:3.10 gramme disinfection powder was fully dissolved in 20 milliliter water for 2 minutes, and then diluted by water to 500 milliliter; after 5 to 10 minutes, the concentration of chlorine dioxide could reach 272 mg/?L. After storing at 54 ℃ for 14 days, the average content of chlorine dioxide decreased by 5.03%.In suspension quantitative bactericidal test, the average killing logarithm value (KL) of Staphylococcus aureus and that of Escherichia coli exposed to solution containing 100 mg/?L chlorine dioxide for 2 minutes were over 5.00.In simulation field trial, the average KL of Escherichia coli exposed to solution containing 100mg/?L chlorine dioxide for 5 minutes was over 3.00. The disinfection powder was non-toxic, non-irritative for rabbit skin and had no function of inducing micronucleus of polychromatic erythrocytes of mouse marrow. Conclusions The solid chlorine dioxide disinfection powder packed in single-ingredient has bactericidal function.Such as environment friendly chemical clo2. Chlorine Dioxide Powder, Pure Chlorine Dioxide, Chlorine Dioxide Granular Nanjing Ligong Shuifu Environmental Protection Technology Co.,Ltd. , https://www.watermanclo2.com
2. Fast filtration speed: generally 40m/h, up to 60m/h, more than 3 times that of ordinary sand filters;
3, the large amount of pollution: generally 15 ~ 35kg/m3, is more than 4 times the ordinary sand filter;
4, low backwash water consumption: backwash water consumption is less than 1 ~ 2% of the period of filtered water;
5, low dosage, low operating costs: due to the filter bed structure and the characteristics of the filter itself, the flocculant dosage is 1/2 to 1/3 of the conventional technology. With the increase of the periodical water production, the operating cost per ton of water will also decrease.
6, small footprint: the same amount of water taken, the area is less than 1/3 of the ordinary sand filter.
7, strong adjustability. Filtering accuracy, interception capacity, filtration resistance and other parameters can be adjusted as needed;
8, filter durable, with a life of more than 20 years.
Process flow:
The flocculating dosing device is used to feed the flocculant to the circulating water in the pump. After the raw water is pressurized by the booster pump, the flocculant is stirred by the water pump impeller to uniformly mix the fine solid particles suspended in the raw water and the colloidal substance to perform the micro-flocculation reaction. Generate flocs larger than 5 μm in volume, flow through the filtration system and enter the high-efficiency asymmetrical fiber filter. The flocs are filtered and retained by the filter material.
1. High filtration precision: The removal rate of suspended solids in water can reach above 95%, and it can remove certain impurities such as macromolecule organics, viruses, bacteria, colloids, iron, etc., and after being treated with good coagulation, When the influent is 10NTU, the effluent is less than 1NTU;