CN107265637A - A kind of leather-making waste water total nitrogen removes technique - Google Patents
A kind of leather-making waste water total nitrogen removes technique Download PDFInfo
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- CN107265637A CN107265637A CN201710523387.2A CN201710523387A CN107265637A CN 107265637 A CN107265637 A CN 107265637A CN 201710523387 A CN201710523387 A CN 201710523387A CN 107265637 A CN107265637 A CN 107265637A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
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Abstract
Technique is removed the invention provides a kind of leather-making waste water total nitrogen, belongs to field of environmental technology.A kind of total nitrogen removes technique, comprises the following steps：S1, sewage enter before biochemistry, wastewater influent Water-quality control；S2, sewage enter anaerobic zone, carry out pre-denitrification and denitrogenation；S3, sewage enter aerobic zone I from anaerobic zone, synchronize nitrification and denitrification reaction；S4, make by reflux pump sewage backflow in aerobic zone I to anaerobic zone；S5, sewage enter aerobic zone I from anaerobic zone, and add carbon source to aerobic zone I；S6, sewage enter settling zone I from aerobic zone I, and precipitation surface load is 1.0；S7, sewage enter aerobic zone II from settling zone I, supplement basicity, depth nitration reaction, and abundant mineralized nitrogen is nitrate nitrogen；S8, sewage enter settling zone II, precipitation surface load 0.8 from aerobic zone II.The present invention has with relatively low cost, efficient to realize the advantage that advanced treating is carried out to leather-making waste water total nitrogen.
Description
Technical field
The invention belongs to field of environment engineering, it is related to a kind of leather-making waste water total nitrogen and removes technique.
Background technology
Leather industry is the pillar industry of China's light industry, now has become the industry with international competitiveness, China
The center of world's leather industry is had become, three big good reputations are enjoyed in the world：One is that stock number is big；Two be that yield is big；Three are
Foreign trade amount is big.Leather industry is the preponderant dinstinctive industry in Zhejiang Province, even more the pillar industry of Haining City and with competition
The specialty industries of advantage, leather has visually been described as " the golden business card " in Haining.But it should also be recognized that, leather industry belongs to tradition
Industry, can produce certain pollutant in process of production.Wherein, the total nitrogen pollutant produced in tanning production is leather industry
In very big pollution, be also to perplex one of subject matter of leather industry development.
So far, existing leather-making waste water total nitrogen removal technology mainly has following three major types：Chemical denitrification treatment technology：Change
Method is typically that in the range of suitable pH, total nitrogen is oxidized into nitrogen or nitrogen oxide, so that removal effect is reached, but this
The removal expense of the method for kind is too high, uneconomical as conventional treatment；Physical chemistry denitrification treatment technology：Mainly by physics and
The process that total nitrogen is separated or decomposed from waste water by chemical method, but it is built and operating cost is of a relatively high, and total nitrogen is not real
Remove, and be transferred into solid waste sludge, be also easy to produce secondary pollution；Bio-denitrification technology：Bioanalysis denitrogenation is to utilize nature
The circulation theory of nitrogen, is controlled by manual method, by ammonification, nitrification, denitrification, is by the nitrogen transformation in water
Nitrogen, so as to overflow discharge into water to the process of air.
Relative to other two kinds of technologies, consider from composite factors such as economic and technicals, for water is larger, total nitrogen concentration compared with
High leather-making waste water, bioanalysis denitrification treatment technology is primary selection, is most economical effective treatment technology, technology into
Ripe, stable, processing cost is relatively low.
The content of the invention
The purpose of the present invention is there is above mentioned problem for existing technology, it is proposed that a kind of leather-making waste water total nitrogen removes work
Skill, this leather-making waste water total nitrogen, which removes technique, to be had and can efficiently be realized with relatively low cost and carried out advanced treating to total nitrogen
Feature.
The purpose of the present invention can be realized by following technical proposal：
A kind of leather-making waste water total nitrogen removes technique, it is characterised in that comprise the following steps：
S1, sewage enter before biochemistry, wastewater influent Water-quality control scope COD1500-2500mg/L, total nitrogen 150-300mg/
L；
S2, sewage enter anaerobic zone, and hydraulic detention time 1 day carries out pre-denitrification and denitrogenation, in the environment of anaerobism,
Anti-nitration reaction is carried out using the degradable COD in leather waste water, reaches that nitrate nitrogen is converted into the purpose of nitrogen；
S3, sewage enter aerobic zone I from anaerobic zone, and hydraulic detention time 2 days synchronizes nitrification and denitrification reaction,
And the basicity that anaerobic zone is produced can supplement the basicity in aerobic zone I；
S4, by reflux pump the sewage in aerobic zone I is set to be back to reflux ratio 100% in anaerobic zone, and aerobic zone I
Nitrate nitrogen carries out denitrogenation with sewage backflow to anaerobic zone；
S5, sewage enter aerobic zone I from anaerobic zone, and add carbon source to aerobic zone I；
S6, sewage enter settling zone I from aerobic zone I, and precipitation surface load is that the sludge in 1.0, settling zone I is largely returned
It flow to outside anaerobic zone, some residual activated sludge and arranges；
S7, sewage enter aerobic zone II from settling zone I, and hydraulic detention time 1 day under low strength COD environment, supplements one
Determine basicity, basicity maintains 200-300mg/L, depth nitration reaction, and abundant mineralized nitrogen is nitrate nitrogen；
The sludge reflux that S8, sewage enter in settling zone II, precipitation surface load 0.8, settling zone II from aerobic zone II is arrived
Aerobic zone II, excess activated sludge discharged to arrive aerobic zone I, the waste water part discharge of settling zone II is a part of with reflux ratio
100% is back to anaerobic zone.
The Prepositive denitrification of anaerobic zone, using organic matter as substrate, what is utilized is the carbon source in waste water, then without external carbon
Source, with relatively low capital construction and operating cost, efficient denitrification reduction COD controls sludge bulking, nitric efficiency is high；Prepositive denitrification
Reacted sewage synchronizes nitrification and denitrification into aerobic zone I, and the basicity that anaerobic zone is produced can be carried to aerobic zone I
For, cost is reduced, and the nitrification liquid of aerobic zone I can be back to anaerobic zone progress denitrogenation.Due to the organic matter quilt in aerobic zone I
Heterotroph consumes, then needs additional carbon, and sewage that can be high to total nitrogen content realizes removal；The setting of aerobic zone II can be protected
Hinder ammonia nitrogen and COD further removal, meanwhile, provide nitrification liquid for anaerobic zone.
In above-mentioned leather-making waste water total nitrogen removes technique, described carbon source is methanol.
In above-mentioned leather-making waste water total nitrogen removes technique, the dissolved oxygen in described anaerobic zone is less than 0.1mg/L.
In above-mentioned leather-making waste water total nitrogen removes technique, the dissolved oxygen in described aerobic zone I is 1-2mg/L.
In above-mentioned leather-making waste water total nitrogen removes technique, the MLSS concentration in described anaerobic zone is 8-10g/L.
In above-mentioned total nitrogen removes technique, the MLSS concentration of described aerobic zone I is 8-10g/L.
In above-mentioned leather-making waste water total nitrogen removes technique, the dissolved oxygen of described aerobic zone II is 2-4mg/L.
In above-mentioned leather-making waste water total nitrogen removes technique, the MLSS concentration of described aerobic zone II is 3-5g/L.
In above-mentioned leather-making waste water total nitrogen removes technique, the volumetric ratio of described anaerobic zone, aerobic zone I and aerobic zone II is
1:2:1。
Compared with prior art, this leather-making waste water total nitrogen, which removes technique, has advantages below：
1st, the present invention synchronizes nitrification and denitrification and in aerobic zone in the Prepositive denitrification of anaerobic zone in aerobic zone I
II depth nitrification can more effectively reach draining total nitrogen≤40mg/L, be less than《Process hides and fur manufacturing industrial water pollution
Thing discharge standard》(GB30486-2013) the in line standard of the leather-making enterprises of table two.
2nd, anaerobic zone is using organic matter as substrate in the present invention, using leather-making waste water high concentration and the strong carbon source of biochemical, then
Without additional carbon, denitrogenation is realized with relatively low capital construction and operating cost, with certain economic benefit, the water conservancy of biochemical reaction
It is 4 days residence times, fast compared with general technology, reduce the input of civil engineering.
3rd, the aerobic zone II in the present invention can ensure ammonia nitrogen and COD further removal.
4th, using Activated Sludge Process, reduce filler application, it is to avoid the fouling of filler is collapsed, and reduce periodically with
The expense changed, it is more economical to be applicable.
Brief description of the drawings
Fig. 1 is the FB(flow block) of the present invention.
Embodiment
The following is specific embodiment of the invention and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
Embodiment one
As shown in figure 1, a kind of leather-making waste water total nitrogen removes technique, comprise the following steps：
S1, sewage enter before biochemistry, wastewater influent Water-quality control scope COD2000mg/L, total nitrogen 180mg/L；
S2, sewage enter anaerobic zone, and hydraulic detention time 1 day carries out pre-denitrification and denitrogenation, in the environment of anaerobism,
Anti-nitration reaction is carried out using the degradable COD in leather waste water, reaches that nitrate nitrogen is converted into the purpose of nitrogen；
S3, sewage enter aerobic zone I from anaerobic zone, and hydraulic detention time 2 days synchronizes nitrification and denitrification reaction,
And the basicity that anaerobic zone is produced can supplement the basicity in aerobic zone I, about supplement 50%；
S4, by reflux pump the sewage in aerobic zone I is set to be back to reflux ratio 100% in anaerobic zone, and aerobic zone I
Nitrate nitrogen carries out denitrogenation with sewage backflow to anaerobic zone；
S5, sewage enter aerobic zone I from anaerobic zone, and add carbon source to aerobic zone I；
S6, sewage enter settling zone I from aerobic zone I, and precipitation surface load is that the sludge in 1.0, settling zone I is largely returned
It flow to outside anaerobic zone, some residual activated sludge and arranges；
S7, sewage enter aerobic zone II from settling zone I, and hydraulic detention time 1 day under low strength COD environment, supplements one
Determine basicity, basicity maintains 200mg/L, depth nitration reaction, and abundant mineralized nitrogen is nitrate nitrogen；
The sludge reflux that S8, sewage enter in settling zone II, precipitation surface load 0.8, settling zone II from aerobic zone II is arrived
Aerobic zone II, it is excess activated sludge discharged to arrive aerobic zone I, the waste water part discharge of the settling zone II of settling zone II, a part
Anaerobic zone is back to reflux ratio 100%.
The Prepositive denitrification of anaerobic zone, using organic matter as substrate, what is utilized is the carbon source in waste water, then without external carbon
Source, with relatively low capital construction and operating cost, efficient denitrification reduction COD controls sludge bulking, nitric efficiency is high；Prepositive denitrification
Reacted sewage synchronizes nitrification and denitrification into aerobic zone I, and the basicity that anaerobic zone is produced can be carried to aerobic zone I
For, cost is reduced, and the nitrification liquid of aerobic zone I can be back to anaerobic zone progress denitrogenation.Due to the organic matter quilt in aerobic zone I
Heterotroph consumes, then needs additional carbon, and sewage that can be high to total nitrogen content realizes removal；The setting of aerobic zone II can be protected
Hinder ammonia nitrogen and COD further removal, meanwhile, provide nitrification liquid for anaerobic zone.
The MLSS concentration that dissolved oxygen in anaerobic zone is less than in 0.1mg/L, anaerobic zone is 9g/L；Dissolving in aerobic zone I
Oxygen is 1.5mg/L, and the MLSS concentration of aerobic zone I is 8.5g/L；The dissolved oxygen of aerobic zone II is 2mg/L, the MLSS of aerobic zone II
Concentration is 3g/L.Wherein, the volumetric ratio of anaerobic zone, aerobic zone I and aerobic zone II is 1:2:1.
Embodiment two
A kind of leather-making waste water total nitrogen removes technique, comprises the following steps：
S1, sewage enter before biochemistry, wastewater influent Water-quality control scope COD2300mg/L, total nitrogen 200mg/L；
S2, sewage enter anaerobic zone, and hydraulic detention time 1 day carries out pre-denitrification and denitrogenation, in the environment of anaerobism,
Anti-nitration reaction is carried out using the degradable COD in leather waste water, reaches that nitrate nitrogen is converted into the purpose of nitrogen；
S3, sewage enter aerobic zone I from anaerobic zone, and hydraulic detention time 2 days synchronizes nitrification and denitrification reaction,
And the basicity that anaerobic zone is produced can supplement the basicity in aerobic zone I, about supplement 50%；
S4, by reflux pump the sewage in aerobic zone I is set to be back to reflux ratio 100% in anaerobic zone, and aerobic zone I
Nitrate nitrogen carries out denitrogenation with sewage backflow to anaerobic zone；
S5, sewage enter aerobic zone I from anaerobic zone, and add carbon source to aerobic zone I；
S6, sewage enter settling zone I from aerobic zone I, and precipitation surface load is that the sludge in 1.0, settling zone I is largely returned
It flow to outside anaerobic zone, some residual activated sludge and arranges；
S7, sewage enter aerobic zone II from settling zone I, and hydraulic detention time 1 day under low strength COD environment, supplements one
Determine basicity, basicity maintains 250mg/L, depth nitration reaction, and abundant mineralized nitrogen is nitrate nitrogen；
The sludge reflux that S8, sewage enter in settling zone II, precipitation surface load 0.8, settling zone II from aerobic zone II is arrived
Aerobic zone II, it is excess activated sludge discharged to arrive aerobic zone I, the waste water part discharge of the settling zone II of settling zone II, a part
Anaerobic zone is back to reflux ratio 100%.
The MLSS concentration that dissolved oxygen in anaerobic zone is less than in 0.1mg/L, anaerobic zone is 10g/L；Dissolving in aerobic zone I
Oxygen is 1.8mg/L, and the MLSS concentration of aerobic zone I is 8.0g/L；The dissolved oxygen of aerobic zone II is 3mg/L, the MLSS of aerobic zone II
Concentration is 4g/L.Wherein, the volumetric ratio of anaerobic zone, aerobic zone I and aerobic zone II is 1:2:1.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Although more having used more term herein, the possibility using other terms is not precluded from.Use these
Term is used for the purpose of more easily describing and explaining the essence of the present invention；It is construed as any additional limitation all
Disagreed with spirit of the present invention.
Claims (9)
1. a kind of leather-making waste water total nitrogen removes technique, it is characterised in that comprise the following steps：
S1, sewage enter before biochemistry, wastewater influent Water-quality control scope COD1500-2500mg/L, total nitrogen 150-300mg/L；
S2, sewage enter anaerobic zone, and hydraulic detention time 1 day carries out pre-denitrification and denitrogenation, in the environment of anaerobism, utilizes
Degradable COD in leather waste water carries out anti-nitration reaction, reaches that nitrate nitrogen is converted into the purpose of nitrogen；
S3, sewage enter aerobic zone I from anaerobic zone, and hydraulic detention time 2 days synchronizes nitrification and denitrification reaction, and detest
The basicity that oxygen area is produced can supplement the basicity in aerobic zone I；
S4, make the nitrate nitrogen that the sewage of aerobic zone I is back to reflux ratio 100% in anaerobic zone, and aerobic zone I by reflux pump
Denitrogenation is carried out with sewage backflow to anaerobic zone；
S5, sewage enter aerobic zone I from anaerobic zone, and add carbon source to aerobic zone I；
S6, sewage enter settling zone I from aerobic zone I, and precipitation surface load is that the sludge in 1.0, settling zone I is largely back to
Arranged outside anaerobic zone, some residual activated sludge；
S7, sewage enter aerobic zone II from settling zone I, and hydraulic detention time 1 day under low strength COD environment, supplements certain alkali
Degree, basicity maintains 200-300mg/L, depth nitration reaction, and abundant mineralized nitrogen is nitrate nitrogen；
S8, sewage enter settling zone II from aerobic zone II, precipitation surface load 0.8, and the sludge reflux in settling zone II is to aerobic
Area II, excess activated sludge discharged to arrive aerobic zone I, the waste water part discharge of settling zone II, a part is with reflux ratio 100% time
It flow to anaerobic zone.
2. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that described carbon source is methanol.
3. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that the dissolving in described anaerobic zone
Oxygen is less than 0.1mg/L.
4. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that molten in described aerobic zone I
Solution oxygen is 1-2mg/L.
5. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that the MLSS in described anaerobic zone
Concentration is 8-10g/L.
6. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that the MLSS of described aerobic zone I
Concentration is 8-10g/L.
7. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that the dissolving of described aerobic zone II
Oxygen is 2-4mg/L.
8. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that the MLSS of described aerobic zone II
Concentration is 3-5g/L.
9. leather-making waste water total nitrogen according to claim 1 removes technique, it is characterised in that described anaerobic zone, aerobic zone I
Volumetric ratio with aerobic zone II is 1:2:1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902957A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | Method for realizing synchronous desulfurization and denitrification of leather wastewater by using sulfur autotrophic denitrification process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070235386A1 (en) * | 2006-04-11 | 2007-10-11 | Barnes Dennis J | Process to improve the efficiency of a membrane filter activated sludge system |
| CN101514069A (en) * | 2009-04-03 | 2009-08-26 | 北京首钢国际工程技术有限公司 | Coking wastewater biological denitrificaion treatment process |
| CN104098227A (en) * | 2014-07-15 | 2014-10-15 | 江南大学 | Method for treating kitchen anaerobic waste water through short-cut nitrification and denitrification |
| CN105036489A (en) * | 2015-08-21 | 2015-11-11 | 浙江大学 | Livestock/poultry culture wastewater deep denitrification and dephosphorization standard treatment device and process |
| CN205556234U (en) * | 2016-04-15 | 2016-09-07 | 邢彩凤 | Synchronous nitrification and denitrification biological denitrogenation and get rid of organic waste water COD's device |
| CN106830539A (en) * | 2017-02-28 | 2017-06-13 | 哈尔滨工业大学 | A kind of stage aeration rear-mounted denitrification denitrification dephosphorization apparatus and technique |
-
2017
- 2017-06-30 CN CN201710523387.2A patent/CN107265637B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070235386A1 (en) * | 2006-04-11 | 2007-10-11 | Barnes Dennis J | Process to improve the efficiency of a membrane filter activated sludge system |
| CN101514069A (en) * | 2009-04-03 | 2009-08-26 | 北京首钢国际工程技术有限公司 | Coking wastewater biological denitrificaion treatment process |
| CN104098227A (en) * | 2014-07-15 | 2014-10-15 | 江南大学 | Method for treating kitchen anaerobic waste water through short-cut nitrification and denitrification |
| CN105036489A (en) * | 2015-08-21 | 2015-11-11 | 浙江大学 | Livestock/poultry culture wastewater deep denitrification and dephosphorization standard treatment device and process |
| CN205556234U (en) * | 2016-04-15 | 2016-09-07 | 邢彩凤 | Synchronous nitrification and denitrification biological denitrogenation and get rid of organic waste water COD's device |
| CN106830539A (en) * | 2017-02-28 | 2017-06-13 | 哈尔滨工业大学 | A kind of stage aeration rear-mounted denitrification denitrification dephosphorization apparatus and technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110902957A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | Method for realizing synchronous desulfurization and denitrification of leather wastewater by using sulfur autotrophic denitrification process |
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