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Which type of sewage is the screw sludge dewatering machine more suitable for?

Generally speaking, the application of screw sludge dewatering machine is very extensive. According to Wikipedia, we can see that this product is widely used in sewage treatment in municipal, aquaculture, textile, leather, electronics, building materials, medicine and other industries. However, which type of sewage is the screw sludge dewatering machine more suitable for?

1. Organic wastewater

Industrial wastewater such as domestic sewage, food processing, and papermaking contains organic substances such as carbohydrates, proteins, oils, and lignin. These substances consume a large amount of dissolved oxygen in the water. After the dissolved oxygen is exhausted, the organic substances undergo anaerobic decomposition to produce hydrogen sulfide. Unpleasant odors such as ammonia and mercaptans further deteriorate the water quality. Through pure biochemical treatment, microorganisms can quickly decompose various organic substances, basically no sludge is discharged, and only a small amount of residue is returned to the front-end adjustment tank or anaerobic tank.

2. Wastewater with high ammonia nitrogen and phosphorus content

The rapid development of petrochemical industry and chemical fertilizers has brought a large amount of high-concentration ammonia nitrogen wastewater. At present, the physical and chemical treatment of ammonia nitrogen wastewater is poor, and the operating cost is expensive. Generally, the biological treatment method requires that the ammonia nitrogen content of wastewater generally does not exceed 300mg/L, which also seriously restricts wastewater treatment. It can directly decompose wastewater with ammonia nitrogen content below 1000mg/L, and domesticated organisms can even treat monosodium glutamate wastewater with organic ammonia nitrogen below 10000mg/L.

The main sources of phosphorus-containing wastewater are excrement and waste from human activities. Different forms of phosphate exist in industrial and mining enterprises, synthetic detergents and household cleaners.

3. Chemical wastewater

Inorganic chemical wastewater is mainly cooling water in process production, containing acid, alkali and a large amount of salts and suspended solids; organic chemical wastewater has various components. Wastewater discharged from the process of synthesizing dyes, paint coatings, pharmaceuticals, etc. has strong aerobic properties and strong toxicity. Most of them are synthetic organic compounds, so they are highly polluting and not easy to decompose. Compared with the wastewater of a single chemical enterprise, the various chemical wastewaters in the chemical park react with each other after mixing, which is easier to treat.

4. River, landscape water

For the treatment of river and landscape water, most of the traditional methods use direct injection of microbial preparations, or planting aquatic organisms and plants, and dredging sediment. Although this method produces a certain amount, it consumes a lot of manpower and material resources, takes a long time for treatment, and is prone to recurrence. After oxygenation and circulation, the sewage can be cleared in a short time. During the period from April to October, if the water body is polluted again in the next year, the treatment equipment can be turned on for another month or so, and there is no need to reinvest. One investment, long-term benefit.

The premise of treating wastewater with screw sludge dewatering machine:

1. Low concentration of sewage. Generally speaking, the sludge concentration of the influent water is 0.2%~5%

2. Good flocculation effect. Because the sludge properties are different and the sewage treatment process is different, different agents need to be selected for different sludges to ensure good flocculation.

The effect of screw sludge dewatering machine on sludge treatment:

Which type of sewage is the screw sludge dewatering machine more suitable for?