Ultrasonic stripping-membrane distillation technology combined landfill leachate treatment system and method

A technology of landfill leachate and ultrasonic stripping, applied in multi-stage water treatment, energy waste water treatment, water/sewage treatment and other directions, can solve the problems that have not been seen before, and achieve the effect of simple equipment, saving operating costs and saving manpower

Inactive Publication Date: 2017-12-15
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no public sewage treatment method combini...

Method used

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  • Ultrasonic stripping-membrane distillation technology combined landfill leachate treatment system and method

Examples

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Effect test

Embodiment 1

[0033] Such as figure 1 As shown, a landfill leachate treatment system combined with ultrasonic stripping-membrane distillation technology includes a water inlet tank 1, an ultrasonic stripping pool 11 and a membrane distillation system, and the membrane distillation system includes a sequentially connected first sewage pump 2, Membrane distillation heating tank 3, membrane distillation reactor 23, condenser 27 and clear water tank 28; the water inlet tank 1 is connected to the first sewage pump 2 pipelines, and the ultrasonic stripping tank 11 is located between the membrane distillation heating tank 3 and the membrane distillation tank. Between the reactors 23; the membrane distillation heating pool 3, the ultrasonic stripping pool 11 and the membrane distillation reactor 23 are connected sequentially through pipelines, and form a circulation loop, wherein the pipeline connecting the membrane distillation heating pool 3 and the ultrasonic stripping pool 11 is provided with T...

Embodiment 2

[0040] Based on the landfill leachate treatment system combined with ultrasonic stripping-membrane distillation technology of embodiment 1, its treatment principle and method are as follows:

[0041] (1) Garbage leachate adjustment: turn on the first sewage pump 2 and pass the garbage leachate in the water inlet pool 1 into the membrane distillation heating pool for heating treatment. The heat in the heating pool is provided by solar energy, and the temperature of the garbage leachate in the pool reaches the set value After setting the temperature range of 65-75°C, adjust the pH value of the landfill leachate to the set range of 11-13;

[0042] The purpose of landfill leachate adjustment is to promote the conversion of ammonia nitrogen in landfill leachate into gaseous ammonia on the one hand, and strengthen the removal effect of ammonia nitrogen by the subsequent ultrasonic stripping method. On the other hand, the high temperature condition of the membrane distillation heating...

Embodiment 3

[0047] Using the above device and method to treat the landfill leachate produced by a certain landfill in Jiangsu, the steps are as follows: (1) put the leachate produced by the landfill into the membrane distillation heating pool 3, heat treatment, and treat the leachate After the temperature rises to 70°C, the pH value of the leachate is adjusted to about 11 through the pH sensor, computer program and pH adjustment tank 9;

[0048] (2) After the water temperature and pH are adjusted, the landfill leachate enters the ultrasonic stripping tank 11 through the second sewage pump 10 for pretreatment, the water temperature is controlled at 55-65°C, the pH is between 11-13, and the ultrasonic stripping time It is 120min, and the sound energy density is 0.05W / mL. The gas (including ammonia and gaseous volatile organic compounds) blown out by ultrasound is absorbed or discharged out of the pool through the absorption bottle 17; and the leachate after pretreatment is discharged into t...

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Abstract

The invention discloses an ultrasonic stripping-membrane distillation technology combined landfill leachate treatment system and method. The system comprises an ultrasonic stripping tank and a membrane distillation system, wherein the membrane distillation system comprises a first sewage pump, a membrane distillation heating tank, a membrane distillation reactor, a condenser and a clean water tank which are connected in sequence; the ultrasonic stripping tank is located between the membrane distillation heating tank and the membrane distillation reactor; the ultrasonic stripping tank, the membrane distillation heating tank and the membrane distillation reactor are connected in sequence through pipelines to from a circulating loop; the membrane distillation reactor, the condenser and the clean water tank are connected in sequence through pipelines to from a circulating loop; the method comprises the following steps: introducing landfill leachate into the membrane distillation heating tank; after raising the temperature, regulating the pH (Potential of Hydrogen) value; the introducing the landfill leachate into the ultrasonic stripping tank and pre-treating; then introducing the landfill leachate into the membrane distillation reactor and further carrying out purification treatment. According to the ultrasonic stripping-membrane distillation technology combined landfill leachate treatment system and method, the removing rate of ammonia nitrogen in the landfill leachate reaches 99 percent or more and water is highly purified; the limitation of a membrane distillation technology on ammonia nitrogen interception is made up.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a landfill leachate treatment system and method combined with ultrasonic stripping-membrane distillation technology. Background technique [0002] Landfill leachate refers to a kind of complex and high-concentration organic wastewater formed during the sanitary landfill process. The composition of landfill leachate is complex, and the concentration of COD and ammonia nitrogen is high. It is a kind of organic wastewater that is difficult to treat. The landfill leachate mainly includes the following characteristics: (1) The water quality is complex, the pollutants are various, and the concentration of organic matter is high; (2) The water quality and water volume vary widely; (3) The concentration of ammonia nitrogen is extremely high, up to several thousand mg / L ; (4) heavy metal ion content is high and many types; (5) nutrient element ratio is out of balance. If...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCC02F1/36C02F1/447C02F1/66C02F9/00C02F2209/40C02F2301/08Y02W10/37
Inventor 程秀鹏刘畅陈琳
Owner HOHAI UNIV
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