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A kind of waste water treatment method and its application

A waste water treatment and waste water technology, applied in metallurgical waste water treatment, food industry waste water treatment, textile industry waste water treatment and other directions, can solve the problems of substandard discharge, long time for biochemical culture, unstable effluent, etc. The effect of meeting emission standards and reducing operating costs and pre-risks

Active Publication Date: 2022-07-08
广东绿巨人环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art, the cultivation of bacteria needs to pull sludge from urban sewage treatment plants or add sewage from septic tanks, which not only takes a long time for biochemical cultivation, but also complicates the implementation plan, and the instability of the effluent can easily lead to substandard discharge. Subculture

Method used

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  • A kind of waste water treatment method and its application
  • A kind of waste water treatment method and its application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The present embodiment provides a method for purifying electroplating wastewater, the method comprising the following steps:

[0037] (1) Sampling of electroplating wastewater to detect its COD and NH 3 -N and Cu + content;

[0038] (2) drop into ferrous sulfate wherein, the dosage is 500mg / L, and the pH value of control waste water is 5-6 scope;

[0039] (3) After 20min, add lime (the dosage is 200mg / L), sodium sulfide (the dosage is 150mg / L), PAC / PAM (the dosage is 150mg / L) for a precipitation, and Control the pH value of wastewater to 8-9, and measure its COD and NH after 20 minutes 3 -N and Cu + content;

[0040] (4) Put in PAC / PAM again (the dosage is 100mg / L) for secondary precipitation, and control the pH value of the wastewater to be 8-9, and measure its COD and NH after 20min 3 -N and Cu + content;

[0041] (5) After 10 minutes, put into the meat processing plant sludge (the dosage is 20g / L), carry out aeration, control the oxygen dissolved amount of th...

Embodiment 2

[0046] This embodiment provides a method for purifying electroplating wastewater. The difference between the method and Embodiment 1 is that the pH value of the wastewater is controlled to be 6-7 in step (5), and other conditions remain unchanged. The results are shown in Table 2:

[0047] Table 2

[0048]

[0049]

[0050] It can be seen from the data in Table 2: the wastewater treatment method involved in the present invention is a very important factor in controlling the pH environment of the wastewater during the aeration process. If the pH value is too low, the COD, NH 3 The purifying ability of -N is significantly reduced.

Embodiment 3

[0052] This embodiment provides a method for purifying electroplating wastewater. The difference between the method and Example 1 is that the pH value of the wastewater is controlled to be 8.5-9.0 in step (5), and other conditions remain unchanged. The results are shown in Table 3:

[0053] table 3

[0054] COD (unit mg / L) NH 3 -N (unit mg / L)

[0055] It can be seen from the data in Table 3: the wastewater treatment method involved in the present invention is a very important factor in controlling the pH environment of the wastewater during the aeration process. If the pH value is too high, the COD, NH 3 The purifying ability of -N is significantly reduced.

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Abstract

The invention relates to a waste water treatment method and application thereof. The waste water treatment method comprises the steps of putting sludge from a meat food processing plant into pretreated waste water, and performing aeration to purify the waste water. The method not only has a short time for biochemical culturing of bacteria, but also has a simple implementation scheme, and the stable effluent is less likely to cause substandard discharge, and ensures that the wastewater can be discharged continuously, stably and up to the standard after treatment.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a wastewater treatment method and application thereof. Background technique [0002] In industrial wastewater treatment, especially in the wastewater treatment of circuit boards, food, and clothing industries, whether the biochemical system can be quickly started and whether the wastewater treatment can meet the discharge standards are the key concerns of environmental protection companies. [0003] CN104229985A discloses a method for purifying and treating activated sludge for wastewater, comprising the following steps: (1) fully mixing and vigorously stirring wastewater and activated sludge; (2) uniformly introducing oxygen at the bottom to increase the solubility of wastewater in the wastewater (3) Settling after completion of the reaction; (4) Separating the settled activated sludge; (5) Filtrating waste water to obtain pure water. Through the above ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F3/30C02F7/00C02F9/14C02F101/16C02F101/38C02F103/16C02F103/30C02F103/32
CPCC02F3/34C02F7/00C02F3/30C02F9/00C02F1/66C02F1/5236C02F1/56C02F2101/16C02F2101/38C02F2103/16C02F2103/30C02F2103/32C02F1/24Y02W10/10
Inventor 赖煜琳杨新玉
Owner 广东绿巨人环境科技有限公司
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