Sodium Metabisulphite can be divided into industrial grade Sodium Metabisulphite and food grade Sodium Metabisulphite according to the type of product and the use. Industrial grade Sodium Metabisulphite has been applied in many aspects, and has an important effect in industrial wastewater treatment, so how to use industrial grade Sodium Metabisulphite in wastewater treatment?
Industrial grade sodium pyrosulfite has an important effect in the treatment of industrial wastewater. Industrial grade Sodium Metabisulphite is a restorative agent used to treat chromium-containing wastewater in wastewater treatment. Chromium containing wastewater in China is required to be treated individually, it can not be discharged to the comprehensive pool, and the concentration of hexavalent chromium can not be higher than 0.1, therefore, the Sodium Metabisulphite injection point in the raw water containing chromium wastewater, the hexavalent chromium is restored to trivalent chromium, and then deposited. Wastewater treatment Sodium Metabisulphite is a white or yellowish powder, which has the effect of recovery under acidic conditions, but has no effect of removing heavy metals. The use of Sodium Sulfide and Sodium Metabisulphite is generally used in the wastewater treatment of electroplating occupations, such as the treatment of hexavalent chromium wastewater, which can first add Sodium Metabisulphite, let them pass through the full recovery of the reaction, and then adjust the alkali to add other products, and then add sodium sulfide to remove the heavy metals that have not finished deposition. This is the important effect of sodium pyrosulfite in the treatment of industrial wastewater.
Industrial grade Sodium Metabisulphite is mainly used as a reducing agent in wastewater treatment, which is used to treat wastewater containing chromium. The specific process is as follows:
1. Adjust the pH value of wastewater to 2-3;
2. Add industrial grade Sodium Metabisulphite to reduce hexavalent chromium to trivalent chromium to reduce its toxicity;
3. Adjust the pH value of the wastewater to 8-9, so that the trivalent chromium ions in the solution precipitate to form Cr (OH) 3;
4. Separate the mud and water and do precipitation treatment.
It should be noted that the reduction of Sodium Metabisulphite needs to be carried out under acidic conditions and cannot remove heavy metals. In practical application, it is necessary to choose the appropriate treatment method and dosage according to the specific situation and treatment requirements of wastewater .
Weifang Toption Chemical lndustry Co., Ltd. is a professional supplier of Sodium Metabisulphite, Industrial Grade Sodium Metabisulphite, Food Grade Sodum Metabisulfite, Calcium Chloride, Calcium Chloride Anhydrous, Calcium Chloride Dihydrate, , Soda Ash, Soda Ash Light, Soda Ash Dense, Caustic Soda, Barium Chloride Dihydrate, Magnesium Chloride, Sodium Bicarbonate, Sodium Hydrosulfite, Gel Breaker, etc. Please visit our website www.toptionchem.com for more information. If you have any requirement, please do not hesitate to contact us.
Post time: Mar-18-2024