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Phosphorus removal from polyferric sulfate

Polyferric sulfate(PFS) can be used as phosphorus remover to purify and treat urban drinking water and industrial circulating water, industrial wastewater and sludge dewatering in chemical industry, oil, mine, paper making, printing and dyeing, brewing, steel, coal gas, paint, leather, pharmaceuticals, food, plating and other industries. So what is its phosphorus removal process?

When polyferric sulfate is added into sewage, ferric ions combine with soluble phosphate in sewage to form insoluble salt precipitation, which makes colloid unstable and removes its phosphorus. During this process, the product hydrolyzes the multi-nuclear complex in water and generates hydroxides, forming large flocs, which gather together to absorb phosphorus from suspension. Settlement of suspended particles. The product iron removes phosphorus by precipitation, coagulation, flocculation and separation of sludge and water. Polyferric sulfate reacts with orthophosphate to form flocculent precipitation, which adsorbs the polyphosphate in wastewater and aggregates and flocculates to form colloids.

After air floatation separation, the phosphorus removal rate of polyferric sulfate can reach more than 95%. The reaction stage of the product is yellow or red-brown amorphous powder or granular solid, so the reaction stage is divided into:

1. Hydrolysis stage: Under the action of hydrolytic fermentation bacteria, macromolecular substances such as carbohydrates, proteins and fats are hydrolyzed and fermented to small molecular substances such as monosaccharides, amino acids, fatty acids, glycerine and carbon dioxide, while solid substances are hydrolyzed to soluble substances.

2. Acidification stage: converting the products of one stage into hydrogen, carbon dioxide and acetic acid at operating temperature

3. Auxiliary part of methane production: The complex, hydrogen and carbon dioxide are converted into methane by the action of two groups of different alkane-producing bacteria.

The above is about the dephosphorization process of Polyferric sulfate. Its reaction stage is mainly divided into three stages: hydrolysis, acidification and methane production. It should be treated in detail, pay attention to the amount of raw material and strictly comply with the requirements. The density of the product is more than 1.45, the total iron content in liquid product is more than 11.5, and the solid product content is more than 21%.

Thank you for your attentionHenan aierfuke Chemical Co., Ltd：Focus on water treatment, only for the healthy world! Our company is committed toPolyaluminium chloride、Polyferric sulfateThe R & D, manufacturing and sales of series of water purification materials are willing to create success with our customers and friends.