Device and method for stepwise extracting mixed organic matters in high-salinity wastewater by using combined membrane

A technology for high-salt wastewater and organic matter, applied in chemical instruments and methods, extraction water/sewage treatment, multi-stage water treatment, etc., can solve problems such as high cost and difficult treatment, achieve low cost, improve treatment efficiency, and efficiently remove Effect

Inactive Publication Date: 2016-08-10
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

However, the general processing is difficult and expensive
In response to these problems, a new osmotic extraction membrane technology has emerged for the treatment of high-salt organic wastewater. The current research mainly uses one membrane to recover or treat an organic substance in high-salt organic wastewater. There is no use of the selective characteristics of different extraction membranes. Application of Osmotic Extraction Membrane Technology in Treatment of Mixed High Salt Organic Wastewater with Complex Composition

Method used

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  • Device and method for stepwise extracting mixed organic matters in high-salinity wastewater by using combined membrane
  • Device and method for stepwise extracting mixed organic matters in high-salinity wastewater by using combined membrane
  • Device and method for stepwise extracting mixed organic matters in high-salinity wastewater by using combined membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, organic acid wastewater treatment of a certain chemical plant:

[0043] The enterprise wastewater mainly contains formic acid, acetic acid, propionic acid, benzoic acid and aromatic acid. The concentration is about 1000mg / L, and the salt content in the raw wastewater is about 6%. It cannot be treated by conventional biological methods. see Figure 4 In the present invention, after the waste water is pretreated, it is directly pumped into the membrane extraction system, the flow rate is controlled to 40L / h, and the temperature is room temperature. The membrane unit 10 is successively selected as a polydimethylsiloxane membrane unit, including 20 membrane modules 3, wherein the specification of the membrane tube 31 is 3mm (inner diameter) × 5mm (outer diameter), that is, the wall thickness is 2mm, and the length is 5m , the total number is 400; the polymethylvinylsiloxane membrane unit includes 20 membrane modules 3, wherein the specification of the membr...

Embodiment 2

[0044] Embodiment 2, a certain chemical plant organic wastewater treatment

[0045] The enterprise's wastewater mainly contains phenolic compounds, organic acid compounds, and a small amount of ester compounds and aromatic hydrocarbons. The concentration is 1200mg / L, and the salt content in the raw wastewater is about 8%. After the wastewater is pretreated, it is pumped into the membrane extraction system, the flow rate is controlled at 60L / h, and the temperature is 20°C. The membrane material is successively selected as a polydimethylsiloxane membrane unit, including 25 membrane modules 3, wherein the specification of the membrane tube 31 is 3mm (inner diameter) × 5mm (outer diameter), the length is 5m, and the total number is 500; Methyl vinyl siloxane membrane unit, including 25 membrane modules 3, wherein the specification of the membrane tube 31 is 3mm (inner diameter) × 5mm (outer diameter), the length is 5m, and the total number is 500 pieces; polyphenylmethoxy The si...

Embodiment 3

[0046] Embodiment 3, a chemical plant organic wastewater treatment:

[0047] The enterprise's wastewater mainly contains methyl orange, benzoic acid and o-toluic acid. The concentration is about 500mg / L, and the salt content in the raw wastewater is about 10%. It cannot be treated by conventional biological methods. In the present invention, after the wastewater is pretreated, it is directly pumped into the membrane extraction system, the flow rate is controlled at 25L / h, and the temperature is 40°C. The membrane unit 10 is four polydimethylsiloxane membrane units connected in series, and each polydimethylsiloxane membrane unit includes 10 membrane modules 3, wherein the specification of the membrane tube 31 is 5 mm (inner diameter) × 6 mm (outer diameter), length is 5m, and the total number is 200; assemble the membrane module 3 and the membrane unit 10, then connect the membrane unit 10 in series, and the extract solution in the polydimethylsiloxane membrane unit is extrac...

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Abstract

The invention relates to a device and a method for stepwise extracting mixed organic matters in high-salinity wastewater by using a combined membrane. The device comprises a plurality of membrane units, each membrane unit comprises an outer barrel and a plurality of membrane components, the outer barrels are serially connected with one another, an inlet of the outer barrel of the first membrane unit serves as a liquid inlet, an outlet of the outer barrel of the last membrane unit is a liquid outlet, two cover plates perpendicular to axis of the corresponding outer barrel are arranged in each outer barrel to form an extraction area positioned between the two cover plates, and an extract water inlet and an extract water outlet are arranged on the wall of the outer barrel of each extraction area, a membrane component is coaxially mounted in the extraction area between the corresponding two cover plates and comprises a plurality of membrane tubes in parallel connection, and two ends of the membrane tubes respectively penetrate the corresponding two cover plates to be communicated with the inlet and the outer let of each outer barrel. The membrane tubes form the corresponding membrane component, and the membrane tubes in each membrane component are in parallel connection, so that treatment efficiency is improved; the corresponding membrane components are mounted in each membrane unit, so that various organic matters in the wastewater can be stepwise removed through different membrane combinations.

Description

【Technical field】 [0001] The invention belongs to the field of environmental protection, and in particular relates to a device and a method for step-by-step extraction of mixed organic matter in high-salt wastewater by a combined membrane. 【Background technique】 [0002] High-salt organic acid wastewater mainly comes from the fields of chemical industry, road deicing and food processing. Other sources that cannot be ignored include printing and dyeing wastewater, saponin wastewater, oil extraction wastewater, papermaking wastewater, and wastewater discharged from the pesticide industry. When the total salt in wastewater reaches more than 1%, it will inhibit or even poison the growth and degradation of microorganisms, making it difficult to degrade organic matter, making it difficult for biological methods to be used in the treatment of saline wastewater. The traditional treatment methods of high-salt wastewater mainly include electrolysis; incineration; membrane biological m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/26C02F103/36
CPCC02F1/44C02F1/265C02F2103/36C02F2301/08
Inventor 花莉石岩马宏瑞郭培
Owner SHAANXI UNIV OF SCI & TECH
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