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Process for treating paper-making waste water

A treatment method and technology for papermaking wastewater, which can be used in processing wastewater treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of heavy metal ions that are difficult to remove, occupy a large area, and invest in large equipment, and achieve a small footprint. , low operating cost, good treatment effect

Inactive Publication Date: 2007-04-25
李慎同
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the obvious disadvantages of this method are: long treatment process, large floor area, large equipment investment, high operating cost, and difficult removal of heavy metal ions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] This embodiment takes paper mill black liquor as an example.

[0011] The waste water is removed by the chain grille and then enters the treatment tank. Add 5 kg of lime to 1 ton of water and stir evenly. After 12 hours of precipitation, the supernatant is obtained, and the supernatant is put into the second In the treatment tank, add 3 kg of lime to 1 ton of water, add lime to settle for 12 hours to get clear water, put the clear water into the third treatment tank, and then add 0.1 kg of naphthalene acid to 1 ton of water for fermentation to remove After the odor is removed, clean water that meets the discharge standard can be obtained.

Embodiment 2

[0013] Take the wastewater from a tofu processing factory as an example.

[0014] The waste water is removed from the solid waste through the chain grille and then enters the treatment tank. Add 4.5 kg of lime to 1 ton of water and stir evenly. After 12 hours of precipitation, the supernatant is obtained, and the supernatant is put into the second In the treatment tank, add 2.5 kg of lime to 1 ton of water, add lime to settle for 12 hours to get clear water, put the clear water into the third treatment tank, and then add 1 kg of naphthalene acid to 0.1 ton of water for fermentation to remove After the odor is removed, clean water that meets the discharge standard can be obtained.

Embodiment 3

[0016] Take winery wastewater as an example.

[0017] The waste water is removed from the solid waste through the chain grille and then enters the treatment tank. Add 4 kg of lime to 1 ton of water and stir evenly. After 12 hours of precipitation, the supernatant is obtained, and the supernatant is put into the second In the treatment tank, add 2 kg of lime to 1 ton of water, add lime to precipitate for 12 hours to obtain clear water, put the clear water into the third treatment tank, and then add 0.1 kg of naphthalene acid to 1 ton of water for fermentation to remove After the odor is removed, clean water that meets the discharge standard can be obtained.

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PUM

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Abstract

The invention discloses a disposing method of waste papering water, which comprises the following steps: (1) adding 4-5kg limestone and 1ton water in the disposing pond to stir evenly; sedimenting 12h; remaining supernatant; (2) adding 2-3kg limestone and 1ton water in the supernatant to sediment 12h; obtaining the clean water; (3) adding 0.1kg naphthalene acid and 1ton water to ferment to remove odor; reaching the draining standard.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a papermaking wastewater treatment method. Background technique [0002] Existing wastewater treatment methods include physical treatment, chemical treatment, and biological treatment. Physical treatment is the most primitive water treatment method, which is to separate and recover insoluble suspended pollutants in sewage through physical action, which can be divided into gravity separation, centrifugal separation and sieving separation. This method is simple and easy to operate, and requires less investment, but it can only do some simple wastewater treatment, and the treatment is very incomplete, so it is difficult to discharge up to the standard. Chemical treatment can remove dissolved and colloidal pollutants in sewage. The chemical treatment is mainly based on the chemical reaction between the injected chemicals and the pollutants, including some unit operations such as neu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/28
Inventor 李慎同
Owner 李慎同