CN102408174A - Wastewater treatment method for producing sodium formaldehyde sulfoxylate - Google Patents
Wastewater treatment method for producing sodium formaldehyde sulfoxylate Download PDFInfo
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- CN102408174A CN102408174A CN2011103089225A CN201110308922A CN102408174A CN 102408174 A CN102408174 A CN 102408174A CN 2011103089225 A CN2011103089225 A CN 2011103089225A CN 201110308922 A CN201110308922 A CN 201110308922A CN 102408174 A CN102408174 A CN 102408174A
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Abstract
The invention discloses a wastewater treatment method for producing sodium formaldehyde sulfoxylate, which comprises a step of preprocessing wastewater and a step of processing microorganism bacteria. The invention has the advantages that: wastewater in producing sodium formaldehyde sulfoxylate is precipitated, neutralized and treated with microorganism bacteria such as sulfate reducing bacteria and methane bacteria and the like, and water body is biologically treated to meet third level discharge standard so that environment is protected.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, particularly a kind of method of wastewater treatment of producing sodium bisulphite formaldehyde.
Background technology
Sodium bisulphite formaldehyde is commonly called as rongalite, is a kind of important chemical feedstocks, is widely used in industry such as viton, printing and dyeing.At present; Zinc powder is generally adopted in the preparation of sodium bisulphite formaldehyde---sulfurous gas---formaldehyde method promptly is made into suspension-s with zinc powder and water, feeds sulfur dioxide gas then and generates zinc dithionite; The SODIUM HYDROSULPHITE zinc solution is added the formaldehyde solution reaction; Add the zinc slurry again and generate alkali formula bisulphite zinc formaldehyde suspension-s, add sodium hydroxide solution again and generate sodium bisulphite formaldehyde solution, make the sodium bisulphite formaldehyde finished product through vacuum concentration.
Produce in the production process of sodium bisulphite formaldehyde that a kind of to contain alkali formula bisulphite zinc formaldehyde solid granule and the COD that formaldehyde is 1500～2500 ㎎/L, zine ion, suspension be that 30000～40000 ㎎/L, biological oxygen demand are the waste water of 25000～30000 ㎎/L, this waste water need pass through handles back up to standard discharging.
Summary of the invention
Goal of the invention: to the problems referred to above, the purpose of this invention is to provide a kind of method of waste water of process for producing sodium bisulphite formaldehyde, make waste water reach emission standard after treatment, reduce environmental pollution.
Technical scheme: 1, a kind of method of wastewater treatment of producing sodium bisulphite formaldehyde is characterized in that this method may further comprise the steps:
(1) waste water gets into the neutralization reaction pond at settling tank through the clear liquid A that post precipitation obtains, and adds alkali lye, regulates PH 9.0～10, and the heating controlled temperature is incubated three hours and obtains suspension liquid B at 60 ℃～80 ℃, after pressure filter separates, obtains clear liquid C then;
(2) clear liquid C gets into and regulates hydrolytic tank, and PH is 6.5～8 in control, adds an amount of tsp, iron trichloride and urea, after biological anaerobic hydrolysis reaction, gets into the horizontal sedimentation tank mud-water separation and obtains clear liquid D;
(3) clear liquid D gets into bio anaerobic device a anaerobic reaction takes place, and gets into preaeration tank a again and exposes to the sun through air and blow, and after getting into equalizing tank then and organic waste water mixing, passes through bio anaerobic device b, preaeration tank b, air flotation pool more successively and obtains clear liquid E;
(4) clear liquid E gets into aerobic activated sludge pond, and the clear liquid F that carries out obtaining after aerobe is handled with mud gets into second pond, and the clear liquid G that the aging biological inoculum among adding coagulating agent and the clear liquid F carries out obtaining after the flocculation reaction is the water body of qualified discharge.
Alkali lye is sodium hydroxide solution or potassium hydroxide solution described in the step (1).
The mud that the horizontal sedimentation tank mud-water separation obtains in the step (2) is back to the adjusting hydrolytic tank, depleted is contained the mud recycle of microbial bacteria.
The water outlet part of bio anaerobic device a is back to the adjusting hydrolytic tank in the step (3), makes and is generated the iron sulphide deposition under the effect of sulfonium ion iron trichloride in regulating hydrolytic tank of microbiological anaerobic decomposition generation.
Its microbial strains that contains of mud described in step (2), the step (4) is mainly sulfate reduction bacterial classification and methane bacterial classification.
Its microbial strains that contains of organic waste water described in the step (3) is mainly the methane bacterial classification.
Beneficial effect: compared with prior art, advantage of the present invention is with the waste water of producing sodium bisulphite formaldehyde, through deposition, in and after the pre-treatment, handle through microbial bacteria again, adopt biologic treating technique, make water body reach three grades of emission standards, the protection environment.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment; Further illustrate the present invention; Should understand these embodiment only be used to the present invention is described and be not used in the restriction scope of the present invention; After having read the present invention, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
Shown in accompanying drawing, the waste water of alkali formula bisulphite zinc formaldehyde solid granule and COD, biological oxygen demand that will contain formaldehyde, zine ion, suspension through deposition, is removed alkali formula bisulphite zinc formaldehyde solid granule at settling tank, obtains clear liquid A; Clear liquid A gets into the neutralization reaction pond, adds sodium hydroxide solution or potassium hydroxide solution and carries out neutralization reaction, regulates PH 9.0～10, and the heating controlled temperature is incubated three hours at 60 ℃～80 ℃, removes zine ion and formaldehyde, obtains suspension liquid B; Suspension liquid B obtains clear liquid C after pressure filter separates the removal zinc hydroxide.
More than being the preprocessing process to waste water, below is the microbial bacteria treating processes to waste water.
Clear liquid C gets into and regulates hydrolytic tank; Also can other sewage be added to mix with clear liquid C together here and carry out wastewater treatment; Improve biodegradability with the thing that has additional nutrients, PH is 6.5～8 in control, adds an amount of tsp, iron trichloride and urea according to N/P ratio; After biological anaerobic hydrolysis reaction; Get into the horizontal sedimentation tank mud-water separation and obtain clear liquid D, the mud that the horizontal sedimentation tank mud-water separation obtains is back to the adjusting hydrolytic tank, and its microbial strains that contains of the mud that this separation obtains is mainly sulfate reduction bacterial classification and methane bacterial classification;
Clear liquid D gets into bio anaerobic device a and carries out anaerobic reaction; To reduce the content of COD; Pollutent among the clear liquid D is decomposed the sulfonium ion that generates by microbiological anaerobic and partly becomes hydrogen sulfide; The water outlet of a bio anaerobic device a part gets into preaeration tank a, and a part is back to the adjusting hydrolytic tank, is back to sulfonium ion in the water outlet of the bio anaerobic device a that regulates hydrolytic tank and under the effect of iron trichloride, generates iron sulphide and precipitate;
The a large amount of air of water outlet warp that get into the bio anaerobic device a of preaeration tank a expose to the sun and blow, and to remove the hydrogen sulfide that produces in the anaerobic reaction, dissolved oxygen are increased;
After the water outlet of preaeration tank a gets into equalizing tank and contains the organic waste water hybrid reaction of methane bacterial classification, more successively through bio anaerobic device b carry out anaerobic reaction further reduce COD content, remove sulfuration hydrogen, remove elemental sulfur through air flotation pool and obtain clear liquid E through a large amount of air stripping that exposes to the sun through preaeration tank b;
Clear liquid E gets into aerobic activated sludge pond, carries out obtaining clear liquid F after aerobe is handled with the mud that contains sulfate reduction bacterial classification and methane bacterial classification; Clear liquid F gets into second pond, and the aging biological inoculum that adds among coagulating agent and the clear liquid F carries out flocculation reaction, and flco is separated the water body that the clear liquid G that obtains after the removal is qualified discharge.
The impurity that produces in each device, deposition collect that the back flocculation concentrates, mummification, burning.
Claims (6)
1. method of wastewater treatment of producing sodium bisulphite formaldehyde is characterized in that this method may further comprise the steps:
(1) waste water gets into the neutralization reaction pond at settling tank through the clear liquid A that post precipitation obtains, and adds alkali lye, regulates PH 9.0～10, and the heating controlled temperature is incubated three hours and obtains suspension liquid B at 60 ℃～80 ℃, after pressure filter separates, obtains clear liquid C then;
(2) clear liquid C gets into and regulates hydrolytic tank, and PH is 6.5～8 in control, adds an amount of tsp, iron trichloride and urea, after biological anaerobic hydrolysis reaction, gets into the horizontal sedimentation tank mud-water separation and obtains clear liquid D;
(3) clear liquid D gets into bio anaerobic device a anaerobic reaction takes place, and gets into preaeration tank a again and exposes to the sun through air and blow, and after getting into equalizing tank then and organic waste water mixing, passes through bio anaerobic device b, preaeration tank b, air flotation pool more successively and obtains clear liquid E;
(4) clear liquid E gets into aerobic activated sludge pond, and the clear liquid F that carries out obtaining after aerobe is handled with mud gets into second pond, and the clear liquid G that the aging biological inoculum among adding coagulating agent and the clear liquid F carries out obtaining after the flocculation reaction is the water body of qualified discharge.
2. the method for wastewater treatment of production sodium bisulphite formaldehyde according to claim 1 is characterized in that: alkali lye is sodium hydroxide solution or potassium hydroxide solution described in the step (1).
3. the method for wastewater treatment of production sodium bisulphite formaldehyde according to claim 1 is characterized in that: the mud that the horizontal sedimentation tank mud-water separation obtains in the step (2) is back to the adjusting hydrolytic tank.
4. the method for wastewater treatment of production sodium bisulphite formaldehyde according to claim 1 is characterized in that: the water outlet part of bio anaerobic device a is back to the adjusting hydrolytic tank in the step (3).
5. the method for wastewater treatment of production sodium bisulphite formaldehyde according to claim 1 is characterized in that: its microbial strains that contains of mud described in step (2), the step (4) is mainly sulfate reduction bacterial classification and methane bacterial classification.
6. the method for wastewater treatment of production sodium bisulphite formaldehyde according to claim 1 is characterized in that: its microbial strains that contains of the organic waste water described in the step (3) is mainly the methane bacterial classification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110308922 CN102408174B (en) | 2011-10-12 | 2011-10-12 | Wastewater treatment method for producing sodium formaldehyde sulfoxylate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110308922 CN102408174B (en) | 2011-10-12 | 2011-10-12 | Wastewater treatment method for producing sodium formaldehyde sulfoxylate |
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| CN102408174A true CN102408174A (en) | 2012-04-11 |
| CN102408174B CN102408174B (en) | 2013-03-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849108A (en) * | 1986-05-14 | 1989-07-18 | Knp Papier B.V. | Process for purifying waste water |
| CN101269895A (en) * | 2008-04-30 | 2008-09-24 | 常熟富士莱医药化工有限公司 | Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation |
| CN101565261A (en) * | 2009-06-03 | 2009-10-28 | 南京大学 | Treatment process for medical intermediate production waste water |
| CN101830602A (en) * | 2010-05-18 | 2010-09-15 | 沈阳石蜡化工有限公司 | Biochemical treatment method of acrylic ester industrial wastewater |
| CN102092892A (en) * | 2010-12-01 | 2011-06-15 | 安徽泰格生物技术股份有限公司 | Treatment method of production wastewater of vitamin C and derivatives of vitamin C |
-
2011
- 2011-10-12 CN CN 201110308922 patent/CN102408174B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4849108A (en) * | 1986-05-14 | 1989-07-18 | Knp Papier B.V. | Process for purifying waste water |
| CN101269895A (en) * | 2008-04-30 | 2008-09-24 | 常熟富士莱医药化工有限公司 | Method for wastewater treatment and circulation recover zero discharge in lipoic acid preparation |
| CN101565261A (en) * | 2009-06-03 | 2009-10-28 | 南京大学 | Treatment process for medical intermediate production waste water |
| CN101830602A (en) * | 2010-05-18 | 2010-09-15 | 沈阳石蜡化工有限公司 | Biochemical treatment method of acrylic ester industrial wastewater |
| CN102092892A (en) * | 2010-12-01 | 2011-06-15 | 安徽泰格生物技术股份有限公司 | Treatment method of production wastewater of vitamin C and derivatives of vitamin C |
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