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Organic wastewater treatment and recycling method

A technology of organic wastewater and pretreatment tank, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Achieve the effect of improving treatment efficiency and slowing down the rate of fouling

Inactive Publication Date: 2015-11-11
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) Organic matter in printing and dyeing, mineral processing and other wastewater is easy to biodegrade, but the content of toxic substances in wastewater is more
(3) The organic substances contained in papermaking, pharmaceutical and other wastewater are difficult to biodegrade, and there may be more toxic substances in wastewater
[0005] For toxic and refractory wastewater, using hydrophobically modified bentonite instead of activated sludge can effectively solve the following problems: (1) Biological methods are selective for the pollutants to be treated, and are not suitable for the treatment of toxic substances and refractory substances , the adsorbent prepared with bentonite-based modification has an indiscriminate synergistic treatment effect on different pollutants

Method used

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Experimental program
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Embodiment 1

[0027] A mineral processing wastewater contains toxic and refractory characteristic pollutants such as heavy metals, aniline black, and butyl xanthate. The water quality is as follows: [Pb]=70.35mg L -1 , [Zn 2+ ]=12.26 mg·L -1 , COD cr =400mg·L -1 , BOD 5 =45mg·L -1 ,pH=9.66

[0028] Implementation steps:

[0029] 1) Transport the raw water to the pretreatment tank through the lift pump, and add 40mg L of polyferron to the pretreatment tank -1 , polyacrylamide 5mg·L -1 , and stirred for 30 minutes.

[0030] 2) In step (1), the mixed liquid overflows to the high-efficiency solid-liquid separation tank.

[0031] 3) The effluent from step (2) overflows into the membrane reaction vessel (1 for standby and 1 for use). The average pore size of the PVDF hollow fiber membrane is 0.1 μm, and the membrane module is connected to an external self-priming pump to realize continuous treatment of wastewater. Add 50g L of organically modified bentonite-based adsorbent to the reacto...

Embodiment 2

[0039] A mineral processing wastewater contains characteristic pollutants such as ethyl thiazolin, butyl xanthate, and heavy metals. The water quality is as follows: [Cu]=0.90mg·L -1 , [Zn 2+ ]=0.32 mg L -1 , [Pb 2+ ]=5.59 mg·L -1 , CODcr=350mg·L -1 ,pH=9.25

[0040] Implementation steps:

[0041] 1) Transport the raw water to the pretreatment tank through the lift pump, and add 60mg·L of polyiron to the pretreatment tank -1 , polyacrylamide 5mg·L -1 , and stirred for 20 minutes.

[0042] 2) Step (1) The mixed liquid overflows to the high-efficiency solid-liquid separation tank, and the supernatant is pre-filtered through a security filter with a precision of 50 μm.

[0043] 3) The effluent from step (2) overflows into the membrane reaction vessel (1 for standby and 1 for use). The average pore size of the PVDF hollow fiber membrane is 0.2 μm, and the membrane module is connected to an external self-priming pump to realize continuous treatment of wastewater. Add 100g ...

Embodiment 3

[0052] The characteristic pollutants of a certain printing and dyeing wastewater are high-salt and biorefractory azo dyes. The water quality is as follows: conductivity = 15200μs·cm -1 , COD cr =900mg·L -1 , SS is 180mg·L -1 , chroma=400, pH=7.52.

[0053] Implementation steps:

[0054] 1) Transport the raw water to the pretreatment tank through the lift pump, and add high-efficiency polyaluminum chloride (HPAC) 120mg L to the pretreatment tank -1 , polyacrylamide 2mg·L -1 , and stirred for 20 minutes.

[0055] 2) Step (1) The mixed liquid overflows to the high-efficiency solid-liquid separation tank, and the supernatant is pre-filtered through a security filter with a precision of 30 μm.

[0056] 3) The effluent from step (2) overflows into the membrane reaction vessel (1 for standby and 1 for use). The average pore size of the PVDF hollow fiber membrane is 0.5 μm, and the membrane module is connected to an external self-priming pump to realize continuous treatment of ...

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Abstract

The present invention discloses an organic wastewater treatment and recycling method, wherein organic mineral-based powder material adsorption and microporous membrane filtration simultaneous-performing process is used, the process has characteristics of stability, efficiency, high equipment integration degree and small occupation area, and the treated water achieves the safe discharge and production recycling standard. According to the present invention, the hydrophobically modified organic mineral powder material is adopted as the adsorption media, and the method can be widely used in the fields of deep treatment of organic wastewater and difficultly-biodegraded pollutants, and the like.

Description

technical field [0001] The invention relates to a treatment and reuse method of organic waste water, which belongs to the field of environmental protection water treatment. Background technique [0002] Organic wastewater has a wide range of sources and can be divided into the following three categories according to its characteristics: (1) Domestic sewage, agricultural and animal husbandry, and industrial wastewater from food processing. The organic matter in the wastewater is easy to biodegrade, and the content of toxic substances in the wastewater is low. (2) Organic matter in printing and dyeing, mineral processing and other wastewater is easy to biodegrade, but the content of toxic substances in wastewater is relatively high. (3) The organic substances contained in papermaking, pharmaceutical and other wastewater are difficult to biodegrade, and there may be more toxic substances in wastewater. Toxic substances in organic wastewater produced by various industries inclu...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
Inventor 黄怀国季常青马龙陈启斌陈征贤林文贤林鸿汉王弘朱莞烨
Owner 厦门紫金矿冶技术有限公司
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