Treatment method for removing ammonia nitrogen from kitchen wastewater
A technology for kitchen wastewater and a treatment method, which is applied to the treatment field of ammonia nitrogen removal from kitchen wastewater, can solve the problems of increased treatment cost, unfavorable normalized treatment of high ammonia nitrogen wastewater, and high treatment cost, and achieves the effect of saving chemicals
Pending Publication Date: 2021-03-26
NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology
It does not consider the influence of carbonate in water, so it will greatly increase the processing cost. At the same time, the method is implemented under the condition of ultra-gravity centrifugation, so the processing cost is high, and the harsh processing conditions also mean high failure rate, which is not conducive to Normalized treatment of high ammonia nitrogen wastewater
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[0025] Example: A treatment device for removing kitchen waste water, including three reactors, the first reactor 1 , the second reactor 2 , the third reactor 3 and the precipitation device 4 .
[0026] The reactors (the first reactor 1, the second reactor 2, and the third reactor 3) and the precipitation device 4 in the above examples are all connected in series.
[0027] Control the residence time of the kitchen waste water in the first reactor 1 to be 30min, and add phosphoric acid to the waste water to adjust the pH to 7 under the condition of the rotating speed of 220r / min, so as to remove a large amount of carbonate radicals present in the waste water. The purpose of adding phosphoric acid is to remove the carbonate in the waste water and at the same time introduce phosphate to prepare for the subsequent formation of struvite.
[0028] Control the residence time of the kitchen waste water in the second reactor 2 to be 30 min, and add magnesium oxide to the waste water und...
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The invention discloses a kitchen wastewater ammonia nitrogen treatment method which comprises the following steps that: kitchen wastewater enters a first reactor, phosphoric acid is added to remove carbonate in the wastewater, then the kitchen wastewater enters a second reactor, magnesium oxide is added and dissolved by stirring, the kitchen wastewater enters a third reactor, magnesium chloride and phosphate are added to form crystal nucleuses and generate struvite precipitates, and the kitchen wastewater enters a precipitation device for precipitating and standing, and the effluent of the supernatant is discharged after reaching the standard. According to the invention, the magnesium ammonium phosphate method is applied to the ammonia nitrogen treatment of the kitchen wastewater by adjusting the types and the adding sequence of the added medicines, so that the use of chemicals is reduced, the cost is reduced, and the ammonia nitrogen treatment effect is improved.
Description
technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for removing ammonia nitrogen from kitchen wastewater. Background technique [0002] With the development of social economy and the improvement of people's living conditions, the types of food on the dining table are becoming more and more abundant, and the kitchen waste produced after meals is also increasing day by day. Food waste has high moisture content and low calorific value. At present, there are few proper treatment and utilization of food waste in China. The main way is to use landfill for landfill treatment, which not only wastes resources, occupies landfill inventory, but also generates A large amount of leachate has caused secondary pollution of the landfill. Therefore, separate treatment of food waste is urgent. [0003] The main components of food waste are food residues, and the chemical components are mainly starch, protein, cellulose, fat and...
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Login to View More IPC IPC(8): C02F9/04C02F101/10C02F101/16
CPCC02F9/00C02F1/66C02F2101/10C02F2101/16C02F2001/007
Inventor 刘军强胜宫建瑞孙少龙王英惠程池权王艳朋
Owner NANJING WONDUX ENVIRONMENTAL PROTECTION TECH CO LTD