Microwave method for processing reverse osmosis concentrated water

A technology of reverse osmosis concentrated water and microwave treatment, which is applied in illumination water/sewage treatment, osmosis/dialysis water/sewage treatment, dehydration/drying/concentrated sludge treatment, etc. RO concentrated water treatment effect is not ideal and other problems, to achieve the effect of reducing operating costs, good technical and economic indicators, and good treatment effect

Inactive Publication Date: 2009-03-11
深圳市弘玮环境技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of unsatisfactory RO concentrated water treatment effect, high treatment cost, and non-recycl...

Method used

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  • Microwave method for processing reverse osmosis concentrated water
  • Microwave method for processing reverse osmosis concentrated water
  • Microwave method for processing reverse osmosis concentrated water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take a landfill leachate after biological and membrane treatment, the waste water is: 1000mL, and the water temperature is 21°C. According to the present invention through following technological process:

[0039]waste water mixed reaction 1 mixed reaction 2 mixed reaction 3 microwave treatment sediment filtration out of water

[0040] The process and parameters are as follows: the RO concentrated water self-regulating tank is pumped into the first-stage mixed reaction 1 and stirred and reacted therein for 5 minutes, and 450 ppm of process additives (composed of Al 2 o 3 4SiO2 2 ·3H 2 O: Na 2 Ca[AlSi 5 o 12 ] 4 12H 2 O:+modified carbon fiber=1.5:2.0:6.5) and ferrous sulfate of 130ppm; the effluent of mixed reaction 1 enters into mixed reaction 2 by gravity, depending on the pH value of concentrated water, a pH value regulator is added therein to make Its pH value is 6.5-9.0; 90ppm of polyaluminum chloride is added to the mixed reaction 3. The mixed...

Embodiment 2

[0046] Reverse osmosis (RO) concentrated water is reused in the electroplating plant, and is processed through the following technological process according to the present invention:

[0047] RO concentrated water mixed reaction 1 mixed reaction 2 mixed reaction 3 microwave processor sediment filtration out of water

[0048] The test process and parameters are as follows:

[0049] Take 1000mL of concentrated RO water in a beaker, and add 250ppm of process additives (composition of Al 2 o 3 4SiO2 2 ·3H 2 O: Na 2 Ca[AlSi 5 o 12 ] 4 12H 2 O: + modified carbon fiber = 3.5:3.0:3.5), 220ppm of ferrous sulfate, stirring continuously for 5 minutes; adding lime to adjust the pH value to 8.5, adding 110ppm of polyaluminum chloride; running in the microwave test processor for 15 Second, the effluent water quality after sedimentation and filtration is 1; take another 1000mL of RO concentrated water, add all the sludge in the first test (no need to dry) and add 50ppm o...

Embodiment 3

[0054] The reverse osmosis (RO) concentrated water of certain large-scale paper mill passes through following technological process according to the present invention:

[0055] RO concentrated water mixed reaction 1 mixed reaction 2 mixed reaction 3 microwave treatment sediment filtration out of water

[0056] The process and parameters are as follows:

[0057] The flow rate of RO concentrated water is: 1000L / h, the water temperature is 34°C, it enters the mixed reaction 1 with an effective volume of 120 liters, and 500ppm of process additives are added to it (the composition of Al 2 o 3 4SiO2 2 ·3H 2 O: Na 2 Ca[AlSi 5 o 12 ] 4 12H 2 O: + modified carbon fiber = 1:2.0:7.0), 220ppm ferrous sulfate and continuous stirring; the effluent enters the mixed reaction 2 with an effective volume of 60 liters, and 90ppm of PAC is added to it; the effluent is pumped into the microwave The processor runs the wave for 20 seconds, and the effluent water after microwave t...

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Abstract

The invention relates to a method for reverse osmosis enriched water by microwave treatment. The method comprises the following steps: adding a process additive, ferrous sulfate and polyaluminium chloride into the reverse osmosis enriched water to perform the pretreatment; putting the pretreated enriched water into a microwave processor from the lower part of the microwave processor and taking out the pretreated enriched water from the middle and upper part of the microwave processor so as to ensure that the process additive, the ferrous sulfate and the polyaluminium chloride perform adequate physical and chemical reactions with the enriched water; guaranteeing that the yielding water of the microwave processor flows into a precipitation filtering unit automatically to realize stable drainage reaching the standards; and branching sludge to cause part of the precipitated sludge to be pumped back to the pretreatment reaction for recycling, and dehydrating the ineffective or residual sludge into dry sludge. The method is applicable to processing various organic waste water or mixed waste water which takes COD and heavy metal as the main pollutant and is hard to biodegrade; the method has the advantages of simple technical processes, convenient control, low treatment cost and less occupied space; in addition, the method fills in the domestic gap of the method for processing the new reverse osmosis enriched water generated in the recycling process of reclaimed water, and has good popularization value.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for microwave treatment of reverse osmosis concentrated water Background technique [0002] Reverse osmosis concentrated water (referred to as RO concentrated water) is a new type of wastewater produced in the process of reclaimed water to meet the requirements of energy saving and emission reduction, with COD, which is difficult to degrade and oxidize, as the main pollutant. The COD concentration is 130~ 600mg / L. At present, there is no effective method for thoroughly treating RO concentrated water. Basically, RO concentrated water is discharged directly without any treatment, and the discharge of such wastewater will increase at a rate of more than 20% every year. According to incomplete statistics, at present, the RO concentrated water with COD exceeding the standard in different degrees produced in China is about 2.6 million m 3 , the processing capacity is 0.6m...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/44C02F11/12
Inventor 郭观发陈杰
Owner 深圳市弘玮环境技术有限公司
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