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Paper mill wastewater recycling process

A waste water recovery and treatment process technology, which is applied in the direction of waste water treatment, water/sewage treatment, special compound water treatment, etc., can solve the problems of air pollution and odor substances not being effectively removed, so as to reduce peculiar smell and eliminate The effect of wide range of odor and accelerated decomposition

Pending Publication Date: 2021-03-16
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the above-mentioned problems in the prior art that the odorous substances in the treated water body have not been effectively removed and the air pollution will be caused during the aeration process during the recycling and treatment of wastewater from paper mills.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A paper mill wastewater recovery treatment process, comprising the following steps:

[0022] S1: adding persulfate to the pretreated wastewater to obtain a mixed solution of persulfate and wastewater;

[0023] S2: Add H to the mixed solution in step S1 2 o 2 solution;

[0024] S3: H has been added in step S2 by ultraviolet light irradiation 2 o 2 mixed solutions of solutions;

[0025] S4: irradiating the mixed solution in step S3 with ultraviolet light to obtain deodorized filter press wastewater.

Embodiment 2

[0027] A paper mill wastewater recovery treatment process, comprising the following steps:

[0028] S1: adding persulfate to the pretreated wastewater to obtain a mixed solution of persulfate and wastewater;

[0029] S2: Add H to the mixed solution in step S1 2 o 2 solution;

[0030] S3: Utilize ultraviolet light with a wavelength of 185nm to irradiate the H that has been added in step S2 2 o 2 mixed solutions of solutions;

[0031] S4: irradiating the mixed solution in step S3 with ultraviolet light with a wavelength of 200 nm to obtain deodorized filter press wastewater.

[0032] Wherein, in the step S1, the persulfate is one or both of potassium persulfate and sodium persulfate.

[0033] In addition, in the step S1, the added amount of the persulfate is 100 mg / L.

[0034] In addition, in the step S2, the H 2 o 2 The volume ratio of solution to pretreated wastewater is 1:1000.

[0035] Wherein, in the step S2, the H 2 o 2 The mass concentration of the solution is...

Embodiment 3

[0039] A paper mill wastewater recovery treatment process, comprising the following steps:

[0040] S1: adding persulfate to the pretreated wastewater to obtain a mixed solution of persulfate and wastewater;

[0041] S2: Add H to the mixed solution in step S1 2 o 2 solution;

[0042] S3: Utilize ultraviolet light with a wavelength of 185nm to irradiate the H that has been added in step S2 2 o 2 mixed solutions of solutions;

[0043] S4: irradiating the mixed solution in step S3 with ultraviolet light with a wavelength of 240 nm to obtain deodorized filter press wastewater.

[0044] Wherein, in the step S1, the persulfate is one or both of potassium persulfate and sodium persulfate.

[0045] In addition, in the step S1, the added amount of the persulfate is 105 mg / L.

[0046] In addition, in the step S2, the H 2 o 2 The volume ratio of the solution to the pretreated wastewater is 1:2000.

[0047] Wherein, in the step S2, the H 2 o 2 The mass concentration of the sol...

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PUM

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Abstract

The invention relates to the technical field of environmental protection, in particular to a paper mill wastewater recovery treatment process. The paper mill wastewater recovery treatment process in the invention comprises the following steps: S1, adding persulfate into pretreated wastewater to obtain a mixed solution of persulfate and wastewater; S2, adding an H2O2 solution into the mixed solution obtained in the step S1; S3, irradiating the mixed solution added with the H2O2 solution in the step S2 by utilizing ultraviolet light; and S4, irradiating the mixed solution obtained in the step S3with ultraviolet light to obtain deodorized filter pressing wastewater. The process has the effect of removing odor substances from various types of wastewater, is wide in deodorization range, and has the characteristics of high efficiency, low cost, simplicity in operation, cleanness, no secondary pollution and the like.

Description

technical field [0001] The invention relates to the technical field of environmental protection, and more specifically, relates to a paper mill wastewater recycling process. Background technique [0002] Odor-smelling wastewater contains a large amount of malodorous substances. If not treated in time, these pollutants will spread into the air and affect the surrounding atmospheric environment, endangering people's health. Therefore, proper technical means must be adopted for disposal before being discharged into the environment or reused. The composition of these malodorous substances is complex, mainly including some organic mercaptans, nitrogen-containing organic substances, halogens and their derivatives, hydrocarbons and aromatic hydrocarbons, which will cause harm to the human body, respiratory system, circulatory system, digestive system, endocrine system and nervous system. etc. will be affected by the foul-smelling gas. Slightly foul-smelling substances can cause n...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F103/28
CPCC02F9/00C02F1/72C02F1/722C02F1/725C02F1/32C02F2303/02C02F2303/04C02F2305/023C02F2103/28
Inventor 潘国强秦华明龙焰
Owner JINAN UNIVERSITY