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Treatment method for phenol and cyanide wastewater generated by gas producer

A technology of gasifier and treatment method, which is applied in biological water/sewage treatment, neutralized water/sewage treatment, multi-stage water/sewage treatment, etc. It can solve the problem of unstable treatment effect of biochemical treatment methods and the preparation of coal water slurry Large system investment, high processing cost and other issues, to achieve obvious economic and environmental benefits, avoid inhibition, and reduce pollution

Inactive Publication Date: 2017-05-17
SICHUAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biochemical treatment method has unstable treatment effect and high cost; although the separate incineration method has a good treatment effect, the treatment cost is high; the coal-water slurry preparation system of the coal-water slurry treatment method has a large investment, and many manufacturers do not have this system, so it is difficult implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Treat 1m per day 3 Phenol cyanide wastewater (pH8.2, COD Cr 8500mg / L, volatile phenol 910mg / L, CN - 4.2mg / L, T-N115mg / L), after reduction with aluminum-zinc composite powder (add 5g of aluminum-zinc composite powder per liter of wastewater, time 4h, 25°C, CO 2 Pressure 0.1MPa), hydrolytic acidification (24h, pH6.0), aerobic biochemical (12h) and activated carbon biological filter tower (hydraulic load is 40m 3 / m 2 .d, the total thickness of activated carbon is 2m) treatment, the effluent water quality is COD Cr 82mg / L, CN - 0.18mg / L, volatile phenol 0.37mg / L, T-N 18mg / L.

Embodiment 2

[0008] Embodiment 2: 20m is processed every day 3 Phenol cyanide wastewater (pH8.3, COD Cr 8000mg / L, volatile phenol 860mg / L, CN - 3.9mg / L, T-N101mg / L), after reduction with aluminum-zinc composite powder (add 10g of aluminum-zinc composite powder per liter of wastewater, time 2h, 45°C, CO 2 Pressure 0.3MPa), hydrolytic acidification (8h, pH8.0), aerobic biochemical (8h) and porous ceramsite biological filter tower (hydraulic load is 100m 3 / m 2 .d. The total thickness of porous ceramsite is 4m), and the effluent quality is COD Cr 70mg / L, CN - 0.10mg / L, volatile phenol 0.27mg / L, T-N 16mg / L.

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Abstract

The invention discloses a treatment method for phenol and cyanide wastewater generated by a gas producer. The method comprises the procedures of filtration, CO2 pressurization, aluminum-zinc composite powder reduction, precipitation, hydrolytic acidification, aerobic treatment and biofilter treatment. The treated wastewater can be stably discharged up to the standard.

Description

technical field [0001] The invention relates to a treatment method for phenol cyanide wastewater produced by a gas generator. Background technique [0002] Coal gas is a kind of fuel widely used in production and life. It is produced from coal through a series of chemical reactions in a gas generator. In the process of preparing cold gas, phenol-cyanide wastewater (wastewater containing phenol and cyanide) will inevitably be produced. If the wastewater is directly discharged into the environment, it will cause serious pollution to the environment. At present, the treatment methods of phenol cyanide wastewater mainly include biochemical treatment method, separate incineration method, coal water slurry treatment method and raw material treatment method mixed into drying tower. The biochemical treatment method has unstable treatment effect and high cost; although the separate incineration method has a good treatment effect, the treatment cost is high; the coal-water slurry pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14B01D53/78B01D53/62C02F101/18C02F101/30C02F101/34
CPCB01D53/62B01D53/78C02F1/001C02F1/66C02F3/02C02F3/28C02F3/34C02F9/00C02F2001/007C02F2101/18C02F2101/30C02F2101/345
Inventor 龙炳清石娟邱艳军
Owner SICHUAN NORMAL UNIVERSITY
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