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Advanced treatment method for coal chemical wastewater

A technology for advanced treatment of coal chemical wastewater, applied in natural water treatment, chemical instruments and methods, biological water/sewage treatment, etc. It can reduce the production of excess sludge, save operating costs, and save processing costs.

Inactive Publication Date: 2010-05-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing aerobic biofilm advanced treatment method has a very low BOD / COD value of coal chemical wastewater, a long film on the carrier, a slow start-up process of the reactor and a long time to reach stability in the existing aerobic biofilm advanced treatment method. Provide a method for advanced treatment of coal chemical wastewater

Method used

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Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0009] Specific Embodiment 1: This embodiment is used for the advanced treatment of coal chemical industry wastewater according to the following steps: 1. Add biological filler and activated sludge to the reactor in turn; 2. Add coal chemical industry wastewater and methanol production wastewater to be treated, Form the mixed wastewater of coal chemical industry and methanol production to be treated, and then add KH to the mixed wastewater of coal chemical industry and methanol production to be treated according to the ratio of COD:P=100:1 2 PO 4 ; 3. Air is introduced into the reactor until the concentration of dissolved oxygen in the mixed wastewater of coal chemical industry and methanol production to be treated is 3-5mg / L; 4. The reactor is aerated for 23 hours, and then statically settled for 1 hour, and the coal is completed. Advanced treatment of chemical wastewater; wherein the amount of biological filler added in step 1 is 25% to 35% of the reactor volume, and the bio...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that the amount of biological filler added in step 1 is 28% to 32% of the reactor volume. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0014] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the amount of biological filler added in step 1 is 30% of the volume of the reactor. Other steps and parameters are the same as those in Embodiment 1.

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PUM

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Abstract

The invention discloses an advanced treatment method for coal chemical wastewater, relates to an advanced treatment method for industrial wastewater, and solves the problems of low BOD / COD value of the coal chemical wastewater, long carrier film forming, slow startup process for a reactor and long waiting time before stabilization existing in the conventional advanced treatment method for an aerobic biological film. The method comprises the following steps of: (1) adding a biological filler and active sludge to the reactor; (2) adding the coal chemical wastewater to be treated, methanol production wastewater and KH2PO4 in turn; (3) introducing air into the reactor; and (4) carrying out static settling after aeration so as to finish the advanced treatment on the coal chemical wastewater. The advanced treatment method for coal chemical wastewater lowers the effluent COD, achieves a carrier film biomass of 0.207 to 0.368 gram of TSS / g of filler, enhances BOD / COD ratio, shortens the film forming process in the reactor and realizes stable running of the reactor within a short period of time. The advanced treatment method for coal chemical wastewater is characterized by simple operation and low cost.

Description

technical field [0001] The invention relates to a method for advanced treatment of industrial waste water. Background technique [0002] Coal chemical wastewater is industrial organic wastewater produced during high-temperature dry distillation of coal, gas purification, and by-product recovery and refining processes. The composition of the wastewater is complex, and the organic matter is mostly phenolic compounds, polycyclic aromatic compounds, and heterocyclic compounds containing nitrogen, oxygen, and sulfur. Composition, while containing a relatively high concentration of ammonia nitrogen. This kind of coal chemical wastewater is highly toxic to microorganisms and is a difficult-to-treat industrial wastewater. After biochemical treatment of coal chemical wastewater, the phenol, cyanide and other pollutants in it can basically meet the national discharge standards, but the COD and ammonia nitrogen in the effluent often cannot meet the discharge standards, and need to be ...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/12C02F103/34C02F101/34
CPCY02W10/10
Inventor 韩洪军李慧强王伟
Owner HARBIN INST OF TECH
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