According to the water quality characteristics of the food industry wastewater, according to the policy requirements, the food wastewater treatment should adopt a comprehensive treatment route combining biological treatment technology and physical and chemical technology, and should not use a single physical and chemical treatment unit as a stable food wastewater treatment process. The wastewater treatment equipment of the food factory first enters the physical and chemical treatment system to remove the animal and vegetable oils and inorganic pollutants in the wastewater, and then enters the biochemical treatment system to remove the organic pollutants in the wastewater, so that the wastewater can meet the discharge standard.

Let's take a look at the relevant content of the sewage treatment equipment in the food factory.

The rapid development of food processing industry has also caused many negative impacts on the environment, because about 30%~50% of the raw materials in food production do not enter the products, which will produce a large number of agricultural by-products and solid wastes.

At the same time, a large amount of production water, clean water and wastewater are discharged during food processing and production. In the sugar industry, the production of a ton of sugar requires 9~10 tons of beet and sugar and 150 tons of water. Each ton of alcohol consumed 3~3.3 tons of grain and 35 tons of water. Each ton of monosodium glutamate requires 3-4 tons of starch and 100 tons of water; It takes 1.7~1.9 tons of corn and 200 tons of water to produce one ton of starch.

Food industry wastewater is non-toxic, but contains a large number of degradable organics. If it is directly discharged into the natural water body without any treatment, it will cause serious environmental pollution. Therefore, the food industry wastewater should be effectively discharged after anti pollution treatment.

Due to the wide variety of food products and the wide source of raw materials, wastewater from the food industry is characterized by high suspended solids and oil content, many heavy metal ions, large chemical oxygen demand and biochemical oxygen demand values, large variation range of water volume, high nitrogen and phosphorus compounds content, and sometimes high water temperature. Sewage treatment process is divided into treatment, secondary treatment and tertiary treatment. For food industry wastewater, solid-liquid separation technology is generally used to remove suspended solids and floating solids in wastewater; Secondary treatment is the main treatment process. Biological treatment technology is generally used to remove toxic substances such as organics in water, while membrane treatment and strong oxidants are generally used to further discharge sewage.

Sludge, waste oil, waste acid, waste alkali and animal and plant wastes generated in the process of food wastewater treatment should also be treated harmlessly.

There are many kinds of raw materials and products in the food industry, and a large amount of water is used in the processing process, so many wastes are discharged as sewage. The quantity and quality of wastewater discharged vary greatly.

The sewage treatment equipment of the food factory is buried below the ground, and the ground above the equipment can be used for greening or other land use, without building houses, heating and insulation.

The two-stage biological contact oxidation process adopts the plug flow biological contact oxidation, and its treatment effect is better than that of the full mixed or two-stage in series full mixed biological contact oxidation tank. Compared with the activated sludge tank, it has the advantages of small volume, strong water quality adaptability, strong impact load resistance, stable effluent quality and no sludge bulking. The pond uses a new type of elastic solid filler, which has a large specific surface area and is easy for microorganisms to form membranes and release. Under the same organic loading conditions, the removal rate of organic matters is higher, which can improve the solubility of oxygen in air in water.

Biological contact oxidation method is adopted for biochemical tank of sewage treatment equipment in food factory. The volume load of the filler is relatively low, the microorganism is in the self oxidation stage, and the sludge output is small. It takes more than three months (90 days) to discharge (pumped by manure truck or dehydrated into mud cake for transportation).

The above is my introduction to the sewage treatment equipment of the food factory to protect the food processing industry! I believe you should have known something about it. Today, the editor will introduce so much to you. If you still have something you don't understand, the editor will answer it for you at any time!