The invention relates to a treatment method for
high fat food processing wastewater. According to the method,
wastewater is treated by the following processes in order to obtain up-to-standard
discharge water, and the treatment processes include: deslagging, ABR
anaerobic treatment, air flotation, biological aerated filter biochemical treatment (called BAF biochemical treatment for short), coagulation,
filtration, disinfection,
sludge treatment and gas treatment. Directed at the
water quality characteristic of
high fat concentration in
food processing wastewater, the method firstly removes animal and
plant floating oil through the configuration of multiple grids in an ABR reactor, then
lime and PAC are added to make animal and
plant oil and other organic pollutants in wastewater form flocs, the
phosphate group in the wastewater reacts with
calcium ions and aluminum ions to generate
phosphate precipitates which are then removed, and then a large number of fine bubbles are produced by an air floatation tank so as to prompt residual fat to adhere to
impurity floc particles, thus forming flocs that have
specific gravity smaller than water and float to the water surface. Therefore, most animal and
plant fat and other organic pollutants can be removed. Not only are the oil indexes up to standards, but also the load of subsequent BAF biochemical treatment is reduced.