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Process for treating high-salt and high-concentration organic wastewater

A technology for organic wastewater treatment and organic wastewater, applied in water/sewage treatment, water treatment parameter control, biological water/sewage treatment, etc., can solve the problems of reduced wastewater treatment volume, reduced solid salt quality, and reduced processing difficulty, achieving The effect of reducing the amount of treatment, reducing the amount of use, and reducing the difficulty of treatment

Pending Publication Date: 2021-06-08
HUAIHUA JINYI ENVIRONMENTAL PROTECTION EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention provides a process for the treatment of high-salt and high-concentration organic wastewater, which simplifies the process flow of the existing high-salt and high-concentration organic wastewater treatment, reduces the amount of wastewater treatment, reduces the difficulty of treatment, and significantly reduces the cost of wastewater treatment; at the same time It solves the problem that the enrichment of high-salt organic matter leads to the reduction of solid salt quality, enables the continuous operation of the entire evaporative desalination process to remove organic matter, improves the quality of solid salt, and can be widely used in the desalination treatment of high-salt wastewater in various industries

Method used

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  • Process for treating high-salt and high-concentration organic wastewater
  • Process for treating high-salt and high-concentration organic wastewater
  • Process for treating high-salt and high-concentration organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A high-salt high-concentration organic wastewater treatment process, comprising the following steps:

[0048] S1. Evaporation and concentration: After softening the high-salt and high-concentration organic wastewater, use a three-effect evaporator for evaporation treatment to obtain steam and wastewater concentrate; the COD of the high-salt and high-concentration organic wastewater Cr The concentration is 6000-10000mg / L.

[0049] S2. Regulating PH: introducing the concentrated wastewater obtained in S1 into an acid-base pool to adjust the pH of the wastewater;

[0050] S3, flocculation and precipitation: send the wastewater in the acid-base pool to the flocculation and sedimentation tank for treatment, and add a composite flocculant;

[0051] The sediments in the flocculation sedimentation tank and the acid-base tank in S2 and S3 are sent to the sludge concentration tank, and the sludge is dehydrated and processed into mud cake for disposal.

[0052] S4. Decomposing o...

Embodiment 2

[0061] A high-salt high-concentration organic wastewater treatment process, comprising the following steps:

[0062] S1. Evaporation and concentration: After softening the high-salt and high-concentration organic wastewater, use a three-effect evaporator for evaporation treatment to obtain steam and wastewater concentrate; the COD of the high-salt and high-concentration organic wastewater Cr The concentration is 160000-180000mg / L.

[0063] S2. Regulating PH: introducing the concentrated wastewater obtained in S1 into an acid-base pool to adjust the pH of the wastewater;

[0064] S3, flocculation and precipitation: send the wastewater in the acid-base pool to the flocculation and sedimentation tank for treatment, and add a composite flocculant;

[0065] The sediments in the flocculation sedimentation tank and the acid-base tank in S2 and S3 are sent to the sludge concentration tank, and the sludge is dehydrated and processed into mud cake for disposal.

[0066] S4. Decomposin...

Embodiment 3

[0075] A high-salt high-concentration organic wastewater treatment process, comprising the following steps:

[0076] S1. Evaporation and concentration: After softening the high-salt and high-concentration organic wastewater, use a three-effect evaporator for evaporation treatment to obtain steam and wastewater concentrate; the COD of the high-salt and high-concentration organic wastewater Cr The concentration is 140000~150000mg / L.

[0077] S2. Regulating PH: introducing the concentrated wastewater obtained in S1 into an acid-base pool to adjust the pH of the wastewater;

[0078] S3, flocculation and precipitation: send the wastewater in the acid-base pool to the flocculation and sedimentation tank for treatment, and add a composite flocculant;

[0079] The sediments in the flocculation sedimentation tank and the acid-base tank in S2 and S3 are sent to the sludge concentration tank, and the sludge is dehydrated and processed into mud cake for disposal.

[0080] S4. Decomposin...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a process for treating high-salt and high-concentration organic wastewater, which comprises the following steps of: S1, evaporation and concentration, S2, wastewater neutralization, S3, flocculent precipitation, S4, organic matter decomposition, S5, steam-water separation and S6, saline-water separation. According to the method, the existing high-salt and high-concentration organic wastewater treatment process flow is simplified, so that the wastewater treatment capacity is reduced, the treatment difficulty is reduced, and the wastewater treatment cost is remarkably reduced; and meanwhile, the problem that the quality of solid salt is reduced due to enrichment of high-salt-containing organic matters is solved, the whole process of removing the organic matters through evaporation desalination is continuously operated, the quality of the solid salt is improved, and the method can be widely applied to desalination treatment of high-salt wastewater in various industries.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, in particular to a process for treating high-salt and high-concentration organic wastewater. Background technique [0002] High-salt organic wastewater refers to wastewater containing organic matter and at least 3.5% (mass fraction) of total dissolved solids. In addition to high concentrations of organic matter, these wastewater also contain a large amount of inorganic salts, mainly chlorine ions, sulfate ions, sodium ions, calcium ions, potassium ions, etc., the salt content is generally calculated by the amount of sodium chloride, and the total salt content is at least 1%. [0003] High-salt wastewater includes high-salt domestic wastewater and high-salt industrial wastewater. There are two main sources of it. One is that seawater is directly used in industrial production and domestic water. The annual utilization of seawater in my country is about 6 billion m3, and it is increasi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/30
CPCC02F9/00C02F1/04C02F1/66C02F1/56C02F1/4672C02F1/725C02F3/2846C02F1/001C02F2101/30C02F2209/08
Inventor 舒建军
Owner HUAIHUA JINYI ENVIRONMENTAL PROTECTION EQUIP
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