Usage Method of Demulsifier for Oily Catering Wastewater
1. Characteristics of oil-containing catering wastewater
a. High oil content: it contains a large number of animal and plant oils, which come from the cooking of food ingredients and tableware washing.
b. Rich in organic matter: such as protein, starch, cellulose, etc., which come from food materials and food processing process.
c.Suspended solids and impurities: food residues, tableware detergent will form a large number of suspended matter and impurities in the wastewater, increasing the difficulty of waste water treatment.
d.Strong pollution: if the catering oil-containing wastewater is discharged directly without treatment, it will cause serious pollution to the water body, affect the water quality, harm the aquatic resources, pollute the air, and affect the crop production, etc.
Kitchen drinking water contains large oil content, rich organic content, low pH value, easy deterioration and odor has a great impact on health. Kitchen wastewater is a very typical kind of difficult treatment wastewater. Oil and water separation is required first in the sewage treatment system. Demulsifier is used in this link.
2. Use method of demulsifier for catering wastewater:
The amount of dosage is determined by small laboratory test selection
1. Take 100ml of raw water, add the corresponding amount of emulsions and stir for 10S;
2. Add PH regulator, adjust the raw water to 7-9, and continue stirring for 10S;
3. Add coagulant (polyacrylamide) aqueous solution to accelerate flocculation, stir for 15S, and wait for the completion of precipitation;
4. According to the effect of raw water to increase or decrease the amount, determine the minimum use.
Finally, if the treated catering wastewater can meet the discharge standards or realize the resource utilization, such as agricultural irrigation water or urban landscape water, it can not only reduce the environmental pressure, but also realize the recycling of resources and promote sustainable development. Therefore, in the whole process of kitchen drinking water treatment, it is necessary to comprehensively consider the technical feasibility, economic cost and environmental benefits, and constantly optimize the treatment process to contribute to the urban environmental protection.
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