Treatment method for recycling complex waste water in coal chemical industry

A technology that integrates waste water and treatment methods, applied in the field of water treatment, can solve the problems that waste water cannot be treated up to the standard, not to mention recycling, etc., and achieve the effects of improving unsatisfactory biochemical effects, great social value, and improving biochemical properties

Inactive Publication Date: 2012-06-27
蓝星环境工程有限公司
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  • Abstract
  • Description
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  • Treatment method for recycling complex waste water in coal chemical industry
  • Treatment method for recycling complex waste water in coal chemical industry
  • Treatment method for recycling complex waste water in coal chemical industry

Examples

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Embodiment 1

[0031] A pilot plant treatment of comprehensive wastewater from a coal chemical industry was carried out, with an inflow of 100L / h. The raw water quality is shown in Table 1.

[0032]

[0033] Coal chemical comprehensive wastewater is firstly mixed with 8% PAC aqueous solution and 1‰ PAM aqueous solution through a pipeline mixer. ≤4.2mg / L; the air flotation water is introduced into the Fenton oxidation pool, and the Fenton oxidation pool is used for FRP anticorrosion, and the dosage of the agent is 400mg / L of ferrous sulfate powder 2+ ion meter), hydrogen peroxide 2.5g / L (with 30% H 2 o 2 meter), the residence time is 40min; then the Fenton effluent is introduced into the iron-carbon micro-electrolytic cell, and the filling rate of the filler is 20%; after that, the pH value of the iron-carbon effluent is adjusted to 8.0 for coagulation and precipitation. After enhanced pretreatment, the COD removal rate of wastewater was about 27.1%, and the B / C ratio increased from 0.1...

Embodiment 2

[0039] The effluent from the clear water pool in Example 1 is introduced into the regeneration and reuse system of multimedia filtration + ultrafiltration + reverse osmosis, wherein the multimedia filter adopts pebbles (8-4mm) and quartz sand (4-2mm, 2-1mm) Use anthracite (0.5-1.0mm) as the filter material, and ensure that the maximum particle size in the influent is ≤200 μm through multi-media filtration; the ultrafiltration membrane adopts Toray's HFS-1010 ultrafiltration membrane, and maintains the SDI of the reverse osmosis influent through ultrafiltration ≤4; Toray’s TML10 anti-pollution membrane is used for reverse osmosis. After passing through the system, the conductivity of the effluent water is ≤50μs / cm, the desalination rate is ≥98%, the COD is ≤5mg / L, the ammonia nitrogen value is ≤1mg / L, and the water quality index meets the requirements for reuse. Require.

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Abstract

The invention provides a treatment method for recycling complex waste water in the coal chemical industry and relates to recycling technologies for enhanced pretreatment, biochemical treatment, deep purification and regeneration process of waste water. The invention provides the process scheme as follows: first enhanced pretreatment for the complex waste water in the coal chemical industry is carried out by using the combined process of air floatation, Fenton oxidation and ferric-carbon micro-electrolysis, so as to improve the biodegradability of the waste water; then the waste water is poured into a biochemical system comprising a hydrolyze acidification zone pool, an anoxic pool and an aerobic pool; the biodegraded water is discharged into a deep purification system with the function ofozone-biological activated carbon filtration, so that materials which are difficult to degrade are further removed, and the discharged water can be used for green spaces and other landscapes; after that, most of salt ions are removed by using a regeneration recycling system with the functions of multi-media filtration, ultrafiltration and reverse osmosis, so as to obtain water can be reused for production.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a recycling treatment method for coal chemical comprehensive wastewater. Background technique [0002] Coal chemical industry comprehensive wastewater is a typical industrial wastewater containing organic compounds that are difficult to degrade. Generally, COD is 4000-5000mg / L, ammonia nitrogen is 200-500mg / L, and the refractory organic substances in wastewater mainly include pyridine, carbazole, biphenyl, terphenyl, etc. [0003] At present, coal chemical wastewater is mainly composed of physicochemical and biochemical processes, among which physicochemical methods include oil separation, air flotation, coagulation, etc. The pretreated coal chemical wastewater generally adopts the anaerobic-aerobic (A / O) biochemical method, but the wastewater still contains some polycyclic and heterocyclic compounds, making it difficult to meet the discharge standards. In o...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 赵雪娜杨帆吉春红郭春禹郑东晟李江杨慧敏郭嘉王晓琴
Owner 蓝星环境工程有限公司
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