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Method for treating phenolic waste water by complex enzyme / activated sludge process

A technology of activated sludge method and phenolic wastewater, which is applied in the direction of water/sludge/sewage treatment, biological water/sewage treatment, gaseous discharge wastewater treatment, etc. Must be cost-effective and other issues, to achieve low equipment requirements, reduce operating costs, and good results

Inactive Publication Date: 2009-08-05
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the existing phenol-containing wastewater treatment methods, "ZL 01142848 A Coking Wastewater Recycling Method" is to mix and incinerate the sewage and the ore to be sintered. The incineration process will inevitably produce gaseous pollutants, and its waste water consumption is also very limited; "ZL 01142858 Activated Sludge-Micro-electrolysis for Industrial Wastewater"consumes a lot of precious electric energy, which is not necessarily economical; The biological method; "ZL 200610033932 Treatment and Recovery Method of Phenol-Containing Coal Gasification Wastewater" includes deacidification, extraction and dephenolization, extraction solvent regeneration, ammonia recovery and residual extraction solvent recovery. The operation is complicated and costly, and it is not suitable for SME use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Gas washing wastewater from a gas generator in a ceramics factory, the color of the wastewater is dark red to purple red, the color is very dark, and its COD Cr As high as 28000mg / L, if discharged directly, it will cause extremely serious pollution to water bodies and nearby soil. The gas generator produces no more than 10 tons of waste water from gas washing every day. Due to the requirements of environmental protection policies, it is strictly forbidden to discharge outside. The ceramic factory had to build a water storage tank, which not only occupied land, but also had a huge risk of pollution accidents caused by leakage.

[0013] If the proportion of 10% of the daily wastewater treatment volume is used to treat phenolic wastewater with this method, it only needs to build a volume of 200-300m 3 The aeration tank is fine. According to the needs of the project, two volumes of 200m were built 3 aeration tank, and make the volume of water in each aeration tank stable ...

Embodiment 2

[0019] Gas washing wastewater from a gas generator in a ceramics factory, the color of the wastewater is dark red to magenta, the color is lighter, but the oil on the water surface is thicker, and its COD Cr If it exceeds 6000mg / L, if it is discharged directly, it will cause extremely serious pollution to the water body and the surrounding soil. The gas generator produces 8 tons of scrubbing waste water every day. Due to the requirements of environmental protection policies, the discharge is strictly prohibited. The ceramics factory had to build a reservoir, which not only occupied land, but also had a huge risk of pollution accidents caused by leakage.

[0020] If the proportion of 10% of the daily wastewater treatment volume is used to treat phenolic wastewater with this method, it only needs to build a volume of 200-300m 3 The aeration tank is fine. According to this patented technology, the following operations are carried out:

[0021] Activated sludge acclimatization a...

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Abstract

The invention relates to a method for treating phenolic wastewater by an activated sludge strengthening method through a complex enzyme preparation. The complex enzyme preparation is non-periodically added into an activated sludge biological treatment unit for treating the phenolic wastewater to activate aboriginal microorganism; therefore, the aboriginal microorganism digests and degrades pollutants in a water body and removes phenols and other toxic organic matters to greatly reduce chemical oxygen demand of the wastewater; and the wastewater can be continuously reused. In an aerobic system for treating the phenolic wastewater by an activated sludge method, when the CODCr of outlet water is obviously risen and color is deepened, 1N complex enzyme preparation is added into a water inlet end of a treatment pool according to 80,000:1 to 40,000:1; the color of the outlet water is thinned rapidly; and CODCr is reduced. The method can be applied to a common activated sludge method, a resting period activated sludge method, an oxidation ditch, a contact oxidation method, a biofilter, a cyclic activated sludge method (CASS), a fully mixed accelerated aeration method, an extended aeration method and a biological turnplate treatment unit. The method has low cost and convenient operation; and equipment has low cost, good treatment effect and large treatment strength and can fully meet the requirement of recycling washing wastewater of a coal gas generating furnace.

Description

(1) Technical field [0001] The invention relates to a method for purifying phenol-containing wastewater, especially gas washing wastewater, in particular to an activated sludge process promoted by a compound enzyme preparation to purify phenol-containing wastewater, so that the purified effluent can be recycled. (2) Background technology [0002] Phenol-containing wastewater is a type of industrial wastewater with a wide range of pollution and serious hazards. The production processes of gas plants, oil refineries, coking plants, synthetic ammonia fertilizer plants, resin plants, dye plants, spice plants, and phenol plants all discharge wastewater containing phenol, with varying levels of phenol. [0003] Among the existing phenol-containing wastewater treatment methods, "ZL 01142848 A Coking Wastewater Recycling Method" is to mix and incinerate the sewage and the ore to be sintered. The incineration process will inevitably produce gaseous pollutants, and its waste water con...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/28C02F3/30C02F101/30C02F101/20C02F103/18
CPCY02W10/10
Inventor 刘振学周建芬陈志高崔家强王锡祥
Owner SHANDONG UNIV OF SCI & TECH
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