CN108996820A - A kind of organic silicon wastewater biochemical processing method - Google Patents
A kind of organic silicon wastewater biochemical processing method Download PDFInfo
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- CN108996820A CN108996820A CN201810827839.0A CN201810827839A CN108996820A CN 108996820 A CN108996820 A CN 108996820A CN 201810827839 A CN201810827839 A CN 201810827839A CN 108996820 A CN108996820 A CN 108996820A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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Abstract
The present invention relates to a kind of organic silicon wastewater biochemical processing methods: through oil separator, horizontal screw machine, air bearing, oxidation, the conventional treatments such as plate compression mode gradually removes the solid particulate matters such as the silicon powder in waste water, silicone oil, silicone oil, then after extracting Nacl by steam circulation revaporizer, processing is finally mixed in a certain ratio with glycin waste water, AOX(organohalogen compounds in waste water are not only effectively reduced) and COD(organic pollutant) content, the organosilicon of difficult biochemical treatment is set to reach first discharge standard in national " waste water comprehensive discharge standard " 8978-1996 table 4 after biochemical treatment, but also the recyclable crude salt that generates is used for ion film caustic soda raw materials for production, practical value with higher.
Description
Technical field
The present invention relates to a kind of methods of organic silicon wastewater biochemical treatment, belong to water pollution process field.
Background technique
120,000 tons/year of silicon powder-containings, silica gel, water-soluble silicons will be generated by producing 240000 tons of devices per year in organic silicon production process
Oil, heavy metal and salinity waste water, silicone oil component boiling point is greater than 75 DEG C (mainly having silane, siloxanes) in waste water, and there are also what is suspended
Partial size is in each metalloids such as 10-100 microns of silicon powders, copper powder, glass putty.It is handled according to the method for precipitating oil removal, surface scum,
Oil slick and bottom precipitation water content of matter are high, and waste total amount is caused to increase.Waste water COD is in 1500ppm after pre-processing simultaneously
More than, it is unable to reach first discharge standard in national " waste water comprehensive discharge standard " 8978-1996 table 4.The country is at present such
Wastewater treatment does not have mature technology, can only simply carry out precipitated and separated processing, separate section silicone oil and silica gel not soluble in water, nothing
Method separates water-soluble silicon oil in waste water, without fundamentally solution environmental issue and causes the waste of water-soluble silicon oil.This technique
It is utilized by steam circulation, reduces processing cost, recycle the silica gel of high-purity technical salt and 99%, there is considerable economic benefit,
The present invention introduces glycin waste water as nutritional ingredient supplement organic silicon wastewater deficiency, by its B/C by being promoted between 0.2-0.3
0.32 or more, so that organic silicon wastewater is can be carried out biochemical treatment, reduce processing difficulty and cost, reaches national " waste water comprehensive discharge
Standard " first discharge standard in 8978-1996 table 4.
Summary of the invention
The object of the present invention is to provide a kind of methods of organic silicon wastewater biochemical treatment.
The solid particulate matters such as the silicon powder-containing generated in organic silicon production process of the present invention, silica gel, water-soluble silicon oil
And the wastewater treatment method of salinity is the silicon powder gradually removed in waste water through oil separator, horizontal screw machine, air bearing, oxidation, plate compression
Then equal solid particulate matters, silica gel, silicone oil extract the (salt content in waste water of Nacl in waste water by steam circulation re-evaporation
1%-5%), organic silicon wastewater only contains a large amount of AOX(organohalogen compounds after being disposed) and a small amount of COD(organic pollutant),
B/C ratio is between 0.2-0.3.Then introduce COD30000-50000ppm between, within ammonia nitrogen 1500ppm, methenamine content
Glycin waste water within 0.5%, supplement organic silicon wastewater in nutriment, by organic silicon wastewater B/C improve to 0.32 with
On, it is handled subsequently into biochemical A/O unit.Present invention uses horizontal screw machine, air-dissolving air-float and steam circulation evaporators etc.
Sophisticated equipment is precipitated water-soluble silicon oil directly and is polymerized to silica gel, and conversion ratio is up to 99% or more；The present invention introduces sweet ammonia
Sour waste water adjusts the nutrition composition of organic silicon wastewater, by organic silicon wastewater B/C by being promoted to 0.32 or more between 0.2-0.3；This
First discharge standard in invention treated waste water reaches national " waste water comprehensive discharge standard " GB8978-1996 table 4, generation
Silica gel and crude salt can be used as organosilicon downstream and caustic soda raw material, practical value with higher.
Detailed description of the invention
Fig. 1 is a kind of organic silicon wastewater biochemical processing process flow chart.
Specific embodiment
Embodiment 1
With containing water-soluble silicone oil waste water 20 tons of (solid particulate matter contents such as silicon powder 73g/L, silicone oil 4.5g/L, COD content
32400ppm, salinity 5%) be used as stoste, through particulate matters such as silicon powder in oil removal, horizontal screw machine, air-flotation process removal waste water, silica gel and
It after silicone oil, is evaporated into steam circulation revaporizer, controls 95 DEG C of falling film evaporator temperature, forced-circulation evaporator temperature 103
DEG C, extract 1 ton of Nacl.Organic silicon wastewater distillate biodegradability 0.27, COD1500ppm introduce glycin waste water (ammonia nitrogen
500ppm, COD45000ppm, methenamine content 0.5%) 5 tons, mixing adjusts pH value, biodegradability 0.34,
COD10200ppm, ammonia nitrogen 2500ppm, methenamine 0.1%, (29.5 DEG C of anaerobism temperature, COD are gone after biochemical A/O cell processing
Except efficiency 63%；Aerobic dissolved oxygen amount 6mg/L, COD removal efficiency 64%, ammonia nitrogen removal frank 31%), water outlet pH value 7.2, COD53ppm,
Ammonia nitrogen 13ppm meets first discharge standard in country's " integrated wastewater discharge standard " GB8978-1996 table 4.
Embodiment 2
With containing water-soluble silicone oil waste water 180 tons of (solid particulate matter contents such as silicon powder 69g/L, silicone oil 4.3g/L, COD content
Between 24500ppm, salinity 4%；) it is used as stoste, through particulate matters, silicon such as silicon powders in oil removal, horizontal screw machine, air-flotation process removal waste water
It after glue and silicone oil, is evaporated into steam circulation revaporizer, controls 96 DEG C of falling film evaporator temperature, forced-circulation evaporator temperature
108 DEG C, extract 6.5 tons of Nacl.Organic silicon wastewater distillate biodegradability 0.28, COD1300pp introduce glycin waste water
45 tons of (ammonia nitrogen 850ppm, COD46000ppm, methenamine content 0.4%), mixing adjust pH value, and methenamine is decomposed into ammonia nitrogen
And formaldehyde, biodegradability 0.33, COD10240ppm, ammonia nitrogen 2250ppm, methenamine 0.15%, through biochemical A/O cell processing
(31 DEG C of anaerobism temperature, COD removal efficiency 76% afterwards；Aerobic dissolved oxygen amount 9mg/L, COD removal efficiency 59%, ammonia nitrogen removal frank 35%),
It is discharged pH value 7.1, COD58ppm, ammonia nitrogen 13ppm, meets level-one in country's " integrated wastewater discharge standard " GB8978-1996 table 4
Discharge standard.
Claims (9)
1. a kind of organic silicon wastewater biochemical processing method, it is characterised in that: gradually separated using combined sewage treating process organic
After silicon powder solid particulate matter, silicone oil in silicon waste water, Nacl, organic silicon wastewater distillation are extracted into steam circulation revaporizer
Liquid is mixed with glycin waste water again, is discharged after triple effect evaporation and A/O biochemical treatment, and the salinity of recycling is used for ion film caustic soda
Raw material.
2. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: in the organic silicon wastewater
Including the solid particulate matter containing silicon powder, silicone oil and salinity, wherein solid particulate matter content 50-80g/L, the silicone oil of silicon powder-containing contain
It measures between 3-5g/L, COD content 20000-35000ppm, salinity 1%-5%.
3. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: combined sewage treating process is
Successively using in five kinds of oil removal precipitating, centrifuge separation, air bearing removal of impurities, oxidation and plate compression common process combination removal waste water
The solid particulate matter and silicone oil of silicon powder-containing.
4. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: main dirty in glycin waste water
Dye object is COD, ammonia nitrogen and methenamine, and COD content is in 30000-50000ppmm, ammonia-nitrogen content 500-1500ppm, Wu Luo
Between tropine content 0.1%-0.5%.
5. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: enter steam circulation re-evaporation
Major pollutants are COD and salinity in the waste water of device, and wherein COD content is in 10000-20000ppmm, and salt content is in 1%-5%
Between.
6. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: returned through steam circulation re-evaporation
The NaOH content of the crystal salt of receipts is 95%-99%, TOC 0-10mg/L, total ammonia nitrogen 0-3mg/L, COD 10-30ppm.
7. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: pass through steam circulation re-evaporation
Device be disposed after organic silicon wastewater and glycin waste water mixed proportion according to glycin waste water ammonia-nitrogen content by 2:1-5:1's
Ratio addition will using the carbon source and nitrogen source in COD, ammonia nitrogen and the methenamine supplement organic silicon wastewater in glycin waste water
Organic silicon wastewater biodegradability is promoted to 0.32 or more.
8. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: steam circulation revaporizer work
Skill state modulator is between 90-105 DEG C of falling film evaporator temperature, between 100-110 DEG C of forced-circulation evaporator temperature.
9. organic silicon wastewater biochemical processing method according to claim 1, it is characterised in that: organic silicon wastewater and glycine
After waste water mixing adjusts pH, methenamine is decomposed into ammonia nitrogen and formaldehyde, and the variation of composite waste major pollutants is COD 10000-
30000ppm, ammonia nitrogen 100-2500ppm, methenamine 0.1-0.5%.
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| CN201810827839.0A CN108996820B (en) | 2018-07-25 | 2018-07-25 | Biochemical treatment method for organic silicon wastewater |
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| CN201810827839.0A CN108996820B (en) | 2018-07-25 | 2018-07-25 | Biochemical treatment method for organic silicon wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429898A (en) * | 2020-11-06 | 2021-03-02 | 湖北兴瑞硅材料有限公司 | Biochemical treatment method for organic silicon high-calcium wastewater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3793937B2 (en) * | 1998-03-25 | 2006-07-05 | オルガノ株式会社 | Silicon wafer polishing wastewater treatment method |
| CN101549938A (en) * | 2009-04-29 | 2009-10-07 | 浙江商达水务有限公司 | Method for treating waste water containing high concentration of organosilicon |
| CN107445392A (en) * | 2017-07-25 | 2017-12-08 | 上海问鼎环保科技有限公司 | Organosilicon produces the high-efficient treatment method of waste water |
-
2018
- 2018-07-25 CN CN201810827839.0A patent/CN108996820B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3793937B2 (en) * | 1998-03-25 | 2006-07-05 | オルガノ株式会社 | Silicon wafer polishing wastewater treatment method |
| CN101549938A (en) * | 2009-04-29 | 2009-10-07 | 浙江商达水务有限公司 | Method for treating waste water containing high concentration of organosilicon |
| CN107445392A (en) * | 2017-07-25 | 2017-12-08 | 上海问鼎环保科技有限公司 | Organosilicon produces the high-efficient treatment method of waste water |
Non-Patent Citations (1)
| Title |
|---|
| 范艳霞: "综合污水处理技术在有机硅单体生产中的应用", 《中国科技期刊数据库 工业C》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112429898A (en) * | 2020-11-06 | 2021-03-02 | 湖北兴瑞硅材料有限公司 | Biochemical treatment method for organic silicon high-calcium wastewater |
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