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Advanced treatment method for carbonization wastewater

A coking wastewater and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, biological water/sewage treatment, etc., can solve the problems of COD, total phenol and ammonia nitrogen pollutants failing to meet the discharge standards

Inactive Publication Date: 2007-05-09
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 problem that the COD, total phenol and ammonia nitrogen pollutants in the effluent of the current coking wastewater treatment still cannot reach the discharge standard, and provide a coking wastewater advanced treatment method

Method used

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  • Advanced treatment method for carbonization wastewater
  • Advanced treatment method for carbonization wastewater
  • Advanced treatment method for carbonization wastewater

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Experimental program
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specific Embodiment approach 1

[0005] Specific Embodiment 1: The advanced treatment of coking wastewater in this embodiment is carried out according to the following steps: (1) the coking wastewater that has been generally treated is passed into the flocculation tank to add chemical-biological composite flocculant; (2) pumped into the sand filter column; (3) ) to aerate the sand-filtered waste water, and then pass it into the immobilized bioactivated carbon reactor to stay for 30-40 minutes, and the water can be discharged; step (3) the immobilized bioactivated carbon reactor is provided with an immobilized bioactivated carbon column, fixed Engineering bacteria were immobilized on the activated carbon column.

[0006] In this embodiment, a chemical-biological composite flocculant is added to the flocculation tank. The biological flocculant in the composite flocculant is a metabolite produced by microorganisms, and its main components are glycoprotein, polysaccharide, protein, cellulose and DNA. The use of c...

specific Embodiment approach 2

[0007] Embodiment 2: The difference between this embodiment and Embodiment 1 is: the chemical-biological composite flocculant in step (1) is composed of chemical flocculant and biological flocculant; 80-120 mg of chemical flocculant is added per liter of waste water agent and 7~13mg bioflocculant. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0008] Specific embodiment three: The difference between this embodiment and specific embodiment one is: the chemical-biological composite flocculant in step (1) is composed of chemical flocculant and biological flocculant; 90-110 mg chemical flocculant is added per liter of waste water Agent and 8 ~ 12mg bioflocculant. Other steps are the same as those in Embodiment 1.

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Abstract

This invention relates to a method for deeply treating wastewater. The method solves the problems of high concentrations of COD, phenols and ammonia nitrogen pollutants in treated water faced by present coking wastewater treatment method. The method comprises: (1) introducing coking wastewater into a flocculation pool, and adding chemical-biological composite flocculant; (2) pumping into a sand filtration column for treatment; (3) aerating, introducing into a fixed biological activated carbon reactor, reacting for 30-40 min, and discharging. A fixed biological activated carbon column is set in the fixed biological activated carbon reactor, on which are engineering bacteria. After treated by this invention, the wastewater contains reduced COD, phenols and ammonia nitrogen pollutants by more than 85%, 90% and 55%, respectively. Besides, this invention can operate in a long time, and has a stable effect with continuous operation of 90-150 days.

Description

technical field [0001] The invention relates to a wastewater advanced treatment method. Background technique [0002] Large discharge of industrial wastewater, low wastewater treatment rate, and poor treatment effect are one of the main reasons for the pollution of my country's water environment. The sewage produced in coking plants and city gas plants in the iron and steel industry during coking and gas generation is called coking wastewater, in which COD, NH 4 + -N concentration is high, organic components are complex, mainly including phenolic compounds, polycyclic aromatic compounds, heterocyclic compounds containing nitrogen, oxygen, sulfur, and aliphatic compounds, and the concentration of pollutants is high, which belongs to refractory biodegradable organic wastewater. At present, coking wastewater at home and abroad is only treated with ordinary coking wastewater. 5 Pollutants can basically meet or approach the discharge standards, but COD, total phenol and ammoni...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/52C02F3/10
CPCY02W10/10
Inventor 马放王晨山丹王继华杨基先
Owner HARBIN INST OF TECH
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