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Technique of biological treatment for wastewater of carbonization

A technology for coking wastewater and biological treatment, applied in sustainable biological treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc. Difficulty in reaching the target, etc.

Inactive Publication Date: 2005-10-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reasons are: 1. The influent COD concentration of the aerobic reactor is high, and the heterotrophic bacteria that use carbon source organic matter as nutrients are dominant bacteria, which inhibit the growth of nitrifying bacteria
Moreover, the influent water contains a high concentration of bioinhibitory organic substances, which also inhibits the activity of nitrifying bacteria. The biological nitrification of the aerobic reactor (O pool) is poor, and the effluent NH 3 -N is hard to hit

Method used

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  • Technique of biological treatment for wastewater of carbonization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] Embodiment 1: Anaerobic hydrolysis acidification reactor hydraulic retention time 4h;

[0031] Upflow anoxic reactor hydraulic retention time 9h;

[0032] Biological contact oxidation pond hydraulic retention time 12h;

[0033] Biological aerated filter hydraulic retention time 12h;

[0034] The effluent from the upflow biological aerated filter flows back to the anoxic packed reactor with a reflux ratio of 2:1.

Embodiment approach 2

[0035] Embodiment 2: Anaerobic hydrolysis acidification reactor hydraulic retention time 6h;

[0036] Upflow anoxic reactor hydraulic retention time 15h;

[0037] Biological contact oxidation tank hydraulic retention time 18h;

[0038] Biological aerated filter hydraulic retention time 24h;

[0039] The effluent from the upflow biological aerated filter is returned to the anoxic packed reactor with a reflux ratio of 4:1.

Embodiment approach 3

[0040] Embodiment 3: Anaerobic hydrolysis acidification reactor hydraulic retention time 12h;

[0041] Upflow anoxic reactor hydraulic retention time 30h;

[0042] Biological contact oxidation tank hydraulic retention time 35h;

[0043] Biological aerated filter hydraulic retention time 35h;

[0044] The effluent from the upflow biological aerated filter is returned to the anoxic packed reactor with a reflux ratio of 4:1.

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Abstract

The present invention relates to a coker waste water biological treatment, and is characterized by that it is a process adopting biological membrane method and utilizing anaerobic treatment, anoxybiotic treatment and two aerobic treatment stages to treat coker waste water, said process equipment is formed from four reactors including anaerobic hydrolysis acidification reactor, up-flowing anoxybiotic reactor, first aerobic biological reactor and second aerobic biological reactor. Said invention also provides the concrete steps of said waste water treatment process and its process condition.

Description

1. Technical field [0001] The invention is a process for biological treatment of coking wastewater, which belongs to the technical fields of environmental protection and wastewater treatment. Specifically, it is a process that uses biofilm method to treat coking wastewater. 2. Technical background [0002] Coking wastewater comes from washing water, steam washing water, separated water after steam fractionation and storage tank drainage during the production process of the coking plant. The composition of wastewater is complex and contains a large amount of organic matter that is difficult to biodegrade. Mainly aromatic organic compounds, heterocyclic and polycyclic organic compounds. In addition, coking wastewater contains high concentrations of NH 3 -N wastewater. [0003] Biological treatment is still the main wastewater treatment method in most coking plants, among which A 2 / O process has the most applications. Currently A 2 / O treatment of coking wastewater COD ...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCY02W10/10
Inventor 李亚新
Owner TAIYUAN UNIV OF TECH
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