Wastewater treatment method and application thereof

A waste water treatment and waste water technology, which is applied in metallurgical waste water treatment, food industry waste water treatment, textile industry waste water treatment, etc., can solve problems such as unstable effluent, non-standard discharge, and long time for biochemical bacteria cultivation, etc., so as to reduce operating costs and predict risk, reduced start-up time, and the effect of meeting emission standards

Active Publication Date: 2020-05-01
广东绿巨人环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Wastewater treatment method and application thereof
  • Wastewater treatment method and application thereof

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, dosage is 500mg / L, and the pH value of control waste water is 5-6 scope;

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

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

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

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] As can be seen from the data in Table 2: the waste water treatment method involved in the present invention controls the pH environment of waste water in the aeration process is a very important factor, if the pH value is too low, its COD, NH 3 The purification 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] As can be seen from the data in Table 3: the wastewater treatment method involved in the present invention controls the pH environment of wastewater in the aeration process is a very important factor, if the pH value is too high, its COD, NH 3 The purification ability of -N is significantly reduced.

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PUM

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Abstract

The invention relates to a wastewater treatment method and an application thereof. The wastewater treatment method comprises the steps of: putting sludge of a meat processing plant into pretreated wastewater, and carrying out aeration so as to purify the wastewater. The method provided by the invention is short in biochemical bacterium culture time and simple in implementation scheme, has stable effluent, is not prone to causing substandard discharging, and guarantees continuous, stable and up-to-standard discharging of the wastewater 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 its application. Background technique [0002] In terms of industrial wastewater treatment, especially in the circuit board, food, and garment industries, whether the biochemical system can be quickly started and whether the wastewater treatment can meet the discharge standards is a key concern of environmental protection companies. [0003] CN104229985A discloses an activated sludge purification treatment method for wastewater, comprising the following steps: (1) fully mixing the sewage and activated sludge and vigorously stirring; (2) uniformly feeding oxygen into the bottom to increase the dissolved (3) After the reaction is completed, let it settle; (4) separate the settled activated sludge; (5) filter the waste water to obtain pure water. Through the above method, the activated sludge purification treatment method f...

Claims

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Application Information

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Patent Type & Authority Applications(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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