Method of treating industrial waste water by actived sludge-micro-electrolytic process

A technology for activated sludge and industrial wastewater, applied in water/sludge/sewage treatment, water/sewage treatment, biological water/sewage treatment, etc. Good removal effect and high removal rate

Inactive Publication Date: 2004-12-22
QILU PETRO CHEM - SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process still has the following disadvantages: when the iron filings corrosion battery method is used to treat industrial wastewater, it is necessary to mix iron filings with activated carbon or carbonaceous substances to form a battery system, which increases the treatment cost or the amount of slag produced, and causes great difficulties for the subsequent slag treatment.

Method used

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  • Method of treating industrial waste water by actived sludge-micro-electrolytic process
  • Method of treating industrial waste water by actived sludge-micro-electrolytic process
  • Method of treating industrial waste water by actived sludge-micro-electrolytic process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The activated sludge used in the test was taken from the first exposure tank of the south sewage treatment plant of Shengli Oil Refinery of Qilu Petrochemical Company. After being washed several times with tap water, it was poured into the tank. Hang a 25cm long 25×25 waste angle iron in the pool water. The treated wastewater is dry-process acrylic fiber process wastewater, and the COD after coagulation-sedimentation to remove insoluble COD is 1315.4mg / L.

[0021] Control the temperature of the reaction zone to be normal temperature, the pH value between 4.5 and 6.5, control the dissolved oxygen to be greater than 0.5 mg.L, and the sludge concentration to be 2 to 4 g / L. The domestication of activated sludge begins with a hydraulic retention time of 24 hours. Gradually reduce the hydraulic retention time until the hydraulic retention time is controlled within 10 hours and the COD removal rate is 45%. At this time, the acclimatization of activated sludge is over.

[0022...

Embodiment 2

[0024] According to the steps and conditions of Example 1, but the pH value of the reaction zone is controlled at 3.5-4.0, the hydraulic retention time is 10 hours, and the COD removal rate of wastewater is 48.5%.

Embodiment 3

[0026] According to the steps and conditions of Example 1, but use 20# carbon steel instead of angle steel to domesticate the activated sludge. After acclimatization, the pH value is controlled at 6.0-6.5, the hydraulic retention time is 10 hours, and the COD removal rate of wastewater is 51.3%.

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Abstract

A process for treating industrial waste water (including waste waters of acrylic fibre, dyeing-printing textile petrochemical trade, etc.) by the active sludge-microelectrolysis method features that the carbon steel is arranged in ordinary active sludge system and the microelectrolysis principle is used to treat industrial waste water. Its advantages are low generation of dregs and high removal rate of COD.

Description

1. Technical field [0001] The invention relates to a treatment method for industrial waste water. 2. Background technology [0002] At present, the most commonly used method to treat industrial wastewater is the activated sludge method. This method is economical, effective and easy to implement in industry. The treatment of the activated sludge method often fails to achieve the expected effect, so people often add pretreatment measures before the activated sludge method. Iron filings filtration, also known as micro-battery method or corrosion battery method, is an important pretreatment method. This method has the characteristics of wide application range, good treatment effect, low cost and convenient operation and maintenance. Most of the iron filings used are waste from the cutting industry, and it does not need to consume limited power resources. It has the characteristics of "treating waste with waste". significance. This method has changed the disadvantages of large...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/463C02F3/12
CPCY02W10/10
Inventor 黄斌邓建利张方银杨晓奕路明义潘咸峰吕军张淑红
Owner QILU PETRO CHEM - SINOPEC
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