System and method for treating and recycling sewage of portable garbage transfer station

Abstract

The invention discloses a system and a method for treating and recycling sewage of a portable garbage transfer station. Sewage is sequentially treated through the following devices: a sewage adjustingtank for storing sewage and stabilizing the water quality; a neutralization, coagulation and stirring integrated device connected with a dosing device; a mud-water separation device adopting a plate-and-frame filter press; a multiphase air flotation device connected to the dosing device and comprising a pressure air dissolving system, a dissolved air release system and an air flotation separationsystem, wherein the pressure air dissolving system comprises a multiphase flow dissolved air water pump and an air-water buffer tank, and the dissolved air release system comprises a pressure regulating valve and a dissolved air water pipeline; an ozone oxidation tower is connected with an ozone generator; and a cloth bag filter. The system and the method are used for meeting the actual water consumption condition of the garbage transfer station.

Description

technical field [0001] The application relates to sewage treatment, in particular to a portable waste transfer station sewage treatment and recycling system and method. Background technique [0002] The average amount of sewage produced by domestic waste transfer stations is about 5.1% of the waste volume. The sewage is weakly acidic, and the pH range is 3.0-6.5; the range of SS and TP is 630-215000mg / L and 8-260mg / L, respectively. It shows the characteristics of high in summer and autumn and low in winter and spring. BOD, COD and ammonia nitrogen are respectively in the range of 2250-35200mg / L, 150-80000mg / L, and 70-1050mg / L. These water quality indicators all reach the maximum in September Concentrations. According to relevant research, the heavy metal content in the sewage of domestic waste transfer stations will basically not exceed the maximum concentration stipulated in the "Water Quality Standards for Discharge of Sewage into Urban Sewers". [0003] The sewage genera...

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Problems solved by technology

[0004] Defects in the existing treatment technology: 1. Using nanofiltration or reverse osmosis, the recovery rate is low, the concentration of concentrated water pollutants produced is high, the treatment is difficult, the process is complicated, the treatment cost is high, and the water utilization rate is low; 2. Construction is required. A large number of structures occupy a large area, and the investment in civil engineering is large; 3. When biochemical abnormalities occur, the water output is unstable, the membrane fouling is serious, the membrane consumption is high, and the operating cost is high; 4. The buildings and structures are scattered, which is not convenient for later expansion ;5. Conventional anaerobic + aerobic biological treatment technology has long residence time of sewage, a large number of equipment, high degree of automation required, cumbersome operation, and high requirements for operators and users

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