Treatment method for bone grain production wastewater

Abstract

The invention provides a treatment method for bone grain production wastewater. The wastewater is filtered by the procedures such as flocculation, adsorption, solid-liquid separation, reverse osmosisfiltration, concentrating, homogenizing and drying. In the treatment method, a low-price natural organic polymeric flocculant is coordinated with a combined adsorbent for use, so that oil and proteinin the wastewater are sufficiently enriched, and an integral wastewater treatment process is simplified; by means of a reverse osmosis technology, required concentrated and dried wastewater is reducedby 50 percent, energy consumption of subsequent procedures is reduced, and the treatment cost of the wastewater is reduced.

Description

Technical field [0001] The invention relates to the technical field of wastewater treatment in environmental engineering, and in particular to a method for treating wastewater from bone pellet production. Background technique [0002] According to statistics, my country’s total annual meat output is about 70 million tons, including more than 20 million tons of bones. Therefore, in recent years, the animal bone deep processing industry has gradually emerged, and a series of high value-added products such as collagen and seasoning have been developed. . At the same time, although the large amount of waste water produced during the deep processing of animal bones does not contain heavy metals and toxic chemicals, it is rich in protein and oil, and has a high salt content (such as rich in Na + , Mg 2+ , Ca 2+ Etc.), the resulting environmental problems have become increasingly prominent. [0003] Chinese patent CN107265683A treats wastewater through filters, linoleum-absorbent felt and...

AI Technical Summary

Problems solved by technology

At the same time, although a large amount of wastewater generated during the deep processing of animal bones does not contain heavy metals and toxic chemicals, it is rich in protein and oil, and has a high salt content (such as rich in Na + , Mg 2+ , Ca 2+ etc.), resulting in increasingly prominent environmental problems

[0003] Chinese patent CN107265683A treats wastewater through filter screens, oil-absorbing felts and other facilities. This process not only has a poor treatment effect, but also cannot effectively remove small molecules such as salts in the wastewater, making it difficult to meet the discharge standards. higher processing costs

Chinese patent CN207405039U adopts anaerobic-anoxic-aerobic biochemical process to treat this type of wastewater to remove impurities such as COD, nitrogen and phosphorus in the wastewater, but the method has a long treatment cycle, low treatment efficiency, and cannot treat the wastewater. Nitrogen, phosphorus and other substances are effectively used, resulting in a certain amount of waste