CN101708920B - Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes - Google Patents
Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes Download PDFInfo
- Publication number
- CN101708920B CN101708920B CN2009101844247A CN200910184424A CN101708920B CN 101708920 B CN101708920 B CN 101708920B CN 2009101844247 A CN2009101844247 A CN 2009101844247A CN 200910184424 A CN200910184424 A CN 200910184424A CN 101708920 B CN101708920 B CN 101708920B
- Authority
- CN
- China
- Prior art keywords
- oxidation ditch
- waste water
- orbal oxidation
- orbal
- leather waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes. Leather waste water firstly enters a preaeration tank to be subject to activated sludge regeneration, and then enters an aerobic biochemical tank to be subject to biochemical treatment; and waste water discharged from the aerobic biochemical tank is subject to mud/water separation and finally enters a joint-type Orbal oxidation ditch to be treated. The process can improve the total ammonia nitrogen removing rate of the leather waste water to more than 99% and keep the removing rates of other impellents at a higher level.
Description
Technical field
The invention belongs to the technology for treating industrial waste water field, be specifically related to the technology that a kind of preaeration tank, aerobic biochemical pond and high denitrogenation Round Sump Orbal (Ao Baoer) oxidation ditch process combine to handle leather-making waste water.
Background technology
Leather-making waste water has that water quality and quantity fluctuation is big, the high good biodegradability of organic pollutant content, organonitrogen and ammonia-nitrogen content are higher.The sewage treatment process of CODCr, BOD5 and SS index present stage can be handled the water quality requirement to qualified discharge with it.But this index of ammonia nitrogen does not reach the water outlet requirement far away, and the leather-making waste water denitrogenation is the difficult problem of a professional.The applicant discloses a kind of " high denitrification shared type oxidation ditch " in Chinese patent CN200610038130.X; Let aerobic, anoxic, the anaerobism microenvironment of outer fissure of Pall oxidation ditch highlight; Improved denitrification effect, floor space, cost of investment significantly reduce.Reach tangible denitrification effect.But, be still waiting perfect in the technological design because quite high, the independent high denitrogenation Round Sump Orbal oxidation ditch process of content of ammonia nitrogen from artificial leather manufacturing and organonitrogen also is difficult to reach emission standard.
Summary of the invention
The objective of the invention is in order to solve the problem of leather-making waste water denitrogenation, a kind of Round Sump Orbal (Ao Baoer) oxidation ditch processing leather waste water that combines with other biochemical process is provided, particularly remove the method for ammonia nitrogen in the waste water.
The object of the invention can reach through following measure:
A kind of high denitrogenation Round Sump Orbal oxidation ditch and other biochemical process combine to handle the technology of leather waste water; This technology is carried out comprehensive associated treatment leather waste water with preaeration tank (active sludge regenerated reactor), aerobic biochemical pond and Round Sump Orbal oxidation ditch three series connection; Concrete grammar is: pretreated tanning sewage is introduced into preaeration tank and carries out active sludge regeneration; Get into the aerobic biochemical pond then and carry out biochemical treatment; The water outlet in aerobic biochemical pond is after mud-water separation, and sewage gets into Round Sump Orbal oxidation ditch at last and handles.
When handling leather-making waste water, for reaching higher denitrogenation purpose, sewage gets into preaeration tank (active sludge regenerated reactor) after pre-treatment; The active sludge partial reflux that high denitrogenation Round Sump Orbal oxidation ditch produces so far mixes at this with the active sludge of backflow at preaeration tank (active sludge regenerated reactor) sewage, and mud is behind abundant aeration; Its active rising; Thereby improve the nitric efficiency of follow-up biochemical section, simultaneously because enough aeration rates, the S in the waste water are arranged
2-Oxidation by air ditch or with H
2The form of S is removed from sewage, alleviates the toxic action of sulphur to follow-up biochemical section mikrobe.
The active sludge that Round Sump Orbal oxidation ditch produces; Most of meeting is in the reuse of Round Sump Orbal oxidation ditch circulating inside; The active sludge of discharging oxidation ditch partly or entirely is back to preaeration tank; Concrete quantity of reflux can be adjusted according to the water quality in the preaeration tank, and quantity of reflux was less when water quality was better, and quantity of reflux can strengthen when water quality was relatively poor; Even can the active sludge of discharging all be back to preaeration tank, and even the part mud of Orbal oxidation ditch circulating inside is back to preaeration tank.The active sludge of discharging Round Sump Orbal oxidation ditch except refluxing, other can directly feed the mud system that enters.
The leather-making waste water that gets into preaeration tank generally will pass through pre-treatment step, is beneficial to steadily carrying out of Sewage treatment systems with stabilizing water quality.This pre-treatment step includes but not limited to equalizing tank, settling tank etc.
Get into the aerobic biochemical pond through regenerated active sludge and sewage; This pond has the synchronous nitration and denitrification function; Cut down ammonia nitrogen and content of total nitrogen to a great extent; The water outlet of aerobic biochemical pond is after settling tank modes such as (or) other biological films carries out mud-water separation, and sewage gets into high denitrogenation Round Sump Orbal oxidation ditch.Sludge concentration in the aerobic biochemical pond is 4000～8000mg/L, and the sludge concentration in the Round Sump Orbal oxidation ditch is 6000～11000mg/L, and the sludge concentration in the Round Sump Orbal oxidation ditch is greater than the sludge concentration in the aerobic biochemical pond.The pH value of the sewage in the aerobic biochemical pond is adjusted to 7～9, is preferably 7.85.Need add alkali continuously, guarantee the required basicity of nitration reaction.Also need control aeration rate in the aerobic biochemical pond, avoid occurring nitrated malnourished situation in the back segment oxidation ditch, this aeration rate can be regulated according to the particular case of water quality.Other operations in aerobic biochemical pond can be as the case may be and the content of ordinary method adjust.The water outlet in aerobic biochemical pond is generally carried out mud-water separation in settling tank (being second pond), the active sludge of settling tank is partly refluxed to the aerobic biochemical pond, and reflux ratio is 50%～150%, and excess sludge is then directly discharged.
Activated Sludge Process or film biological treatment specifically can be adopted in the aerobic biochemical pond; But with oxidation ditch Carrousel oxidation ditch best results particularly; Below also be called for short A section oxidation ditch, A section oxidation ditch can adopt φ 1500 high efficient aeration type rotary aeration discs to carry out aeration.
In high denitrogenation Round Sump Orbal of the present invention (Ao Baoer) oxidation ditch, sewage flows through successively that the sampling of central island anaerobic zone, outer fissure is gone, middle ditch septal fossula aerobic zone, aerobic zone exhalant region and nitrification liquid recirculating zone, two heavy districts.Mud in the two heavy districts drains into mud through scraping and sucking machine and refluxes and excess sludge discharge district (the folder districts in Zhong Gou and two heavy districts), and the mud major part is back to into water mixing zone here, gets into the oxidation ditch system circulation again; Be partly refluxed to preaeration tank (active sludge regenerated reactor) and carry out mud regeneration back entering Sewage treatment systems; Other mud (i.e. mud except that refluxing) is with the mode effluent sewerage treatment system of excess sludge.The aerating apparatus of Round Sump Orbal oxidation ditch, outer fissure adopts φ 1800 efficient push flowing rotary aeration discs, and middle septal fossula adopts φ 1500 high efficient aeration type rotary aeration discs to combine with thruster.
In order to reduce floor space, reduce investment, reduce working cost.The present invention adopts Round Sump Orbal oxidation ditch; Being about to second pond and Orbal oxidation ditch builds jointly; Between the outer fissure of Orbal oxidation ditch and middle ditch, be provided with second pond, and the gradually layer between outer fissure inwall, middle ditch outer wall and second pond outer wall separate be set to oxidation zone exhalant region and nitrification liquid recirculating zone, mud refluxes and excess sludge discharge district and water inlet mixing zone.Because adopt and build technology jointly, the length of outer fissure straight-line segment is elongated (comparing common Orbal oxidation ditch), the distance between the plate-spinning unit strengthens, and for short-cut nitrification and denitrification provides necessary condition, thereby has increased the nitric efficiency of system.
This process using pre-exposure pond (active sludge regenerated reactor), aerobic biochemical pond and high denitrogenation Round Sump Orbal oxidation ditch combine to handle leather-making waste water; Through partly or entirely being back to the pre-exposure pond from Round Sump Orbal oxidation ditch, active sludge carries out active sludge regeneration; Recycle and the different biochemical stage active sludge of mud, the communication between the biochemical efficiency have not only been realized; And make the further activation of active sludge; Make the activity of various processing bacterium stronger; Thereby improved the processing efficiency in aerobic biochemical pond greatly,, also alleviated the processing pressure of back segment biochemical treatment (being high denitrogenation Round Sump Orbal oxidation ditch) simultaneously particularly to treatment of ammonia nitrogen efficient (being nitrification efficiency).Two sections biochemistry pools after pre-exposure pond (active sludge regenerated reactor) all have the function (especially high denitrogenation Round Sump Orbal oxidation ditch increases the nitrification liquid return-flow system) of synchronous nitration and denitrification simultaneously; These two sections biochemical treatments cooperatively interact under the communication of activity sludge reflux; Produce synergistic function; Make the various indexs of final treat effluent reach preassigned, system has also reached higher stage to the removal efficient of total nitrogen, and the denitrification effect especially removal of ammonia nitrogen reaches domestic and international top standard.Owing to adopt the technology of building jointly, the floor space of this technology reduces simultaneously, reduces investment.Be transformed to the pipe connecting between each functional zone in the pond owing to will connect the connecting tube that branch builds between each pond of formula, reduced the head loss between each functional zone, and then reduced working cost.
Method of the present invention can reach the total clearance of the ammonia nitrogen of leather-making waste water more than 99%; And the clearance of other pollutents also maintains higher level; Practice confirms; This technology can reach CJ3082-1999 " sewage enters municipal sewage system water quality standard (municipal sewage plant's standard is arranged) " to the removal of ammonia nitrogen, and CODcr, SS, sulfide, pH value are reached the grade III Standard in GB8978-1996 " integrated wastewater discharge standard " table 1 standard and the table 4.Zhejiang Fu Bang Group Co.,Ltd sewage works is after technological transformation; What adopt is this technology, and Environmental Protection Agency's continuous detecting through Haining is under the situation of the average 243mg/l of influent ammonia nitrogen; High denitrogenation Round Sump Orbal oxidation ditch water outlet ammonia nitrogen average is 1.74, and the total clearance of ammonia nitrogen reaches 99.3%.
Description of drawings
Fig. 1 is a kind of process flow diagram of the present invention.
Embodiment
Below with the rich 2500m of nation in Zhejiang
3/ d leather waste water processing project is an example, and the present invention was done a step explanation.
With pre-exposure pond (active sludge regenerated reactor), aerobic biochemical pond and high denitrogenation Round Sump Orbal oxidation ditch three series connection, leather sewage after the modulation pre-treatment, flow through successively pre-exposure pond (active sludge regenerated reactor), aerobic biochemical pond and high denitrogenation Round Sump Orbal oxidation ditch.Through three segment process sewage is handled.
Sewage is in preaeration tank (active sludge regenerated reactor); Mix with the active sludge that refluxes by high denitrogenation Round Sump Orbal oxidation ditch earlier; Through a large amount of aerations (aeration rate is 60: 1～5: 1 with the ratio of the water yield), sludge activation regeneration back together gets into the aerobic biochemical pond with sewage then.
Sewage (specifically adopts Carrousel oxidation ditch) in the aerobic biochemical pond carries out preliminary denitrogenation, and this pond control aeration rate is avoided the nitrated malnourished situation of the biochemical appearance of back segment.In aerobic biochemistry pool, add alkali continuously, the pH value of sewage is remained between 7～9, in 7.85 the bests, thereby the growth that guarantees the nitrifier in this section and the following segment process is under the enabling environment.Sludge concentration is controlled between 6000～8000mg/l in the aerobic biochemical pond, carries out sufficient nitration reaction.Get into settling tank through the reacted mud mixture of biochemistry pool and carry out mud-water separation, the sewage after the separation gets into high denitrogenation Round Sump Orbal oxidation ditch.The mud major part that precipitates is back to aerobic biochemical pond (reflux ratio 50%～150%), and part is as excess sludge effluent sewerage treatment system.
In high denitrogenation Round Sump Orbal oxidation ditch, sewage flows through successively that the sampling of central island anaerobic zone, outer fissure is gone, middle ditch septal fossula aerobic zone, aerobic zone exhalant region and nitrification liquid recirculating zone, two heavy districts.Mud in the two heavy districts drains into mud through scraping and sucking machine and refluxes and excess sludge discharge district (the folder districts in Zhong Gou and two heavy districts), and the mud major part is back to into water mixing zone here, gets into the oxidation ditch system circulation again; Be partly refluxed to preaeration (active sludge regenerated reactor) and carry out mud regeneration back entering Sewage treatment systems; Other mud is with the mode effluent sewerage treatment system of excess sludge.Sludge concentration is controlled between 8000～11000mg/l and greater than sludge concentration in the aerobic biochemical pond in this section oxidation pond.
Leather waste water to all contaminations, particularly ammonia nitrogen such as total chromium, CODcr, SS, sulfide, is removed processing in above-mentioned operation.Adopt four batches of the leather waste waters of product in this art breading different times and the different operation, the pollutant load of former water and the pollutant load of handling the back water outlet are seen table 1.Wherein in the 3rd batch and the 4th batch, the aeration rate in the preaeration tank is adjusted into 60: 1 with the ratio of the water yield～and 30: 1.
Table 1
Claims (7)
1. one kind high denitrogenation Round Sump Orbal oxidation ditch and other biochemical process combine to handle the technology of leather waste water; It is characterized in that tanning sewage is introduced into preaeration tank and carries out active sludge regeneration; Get into the aerobic biochemical pond then and carry out biochemical treatment; The water outlet in aerobic biochemical pond is after mud-water separation, and sewage gets into Round Sump Orbal oxidation ditch at last and handles; The active sludge of Round Sump Orbal oxidation ditch partly or entirely is back to preaeration tank.
2. high denitrogenation Round Sump Orbal oxidation ditch according to claim 1 and other biochemical process combine to handle the technology of leather waste water; Mud-water separation is carried out in the water outlet that it is characterized in that described aerobic biochemical pond in settling tank; The active sludge of settling tank is partly refluxed to the aerobic biochemical pond, and its reflux ratio is 50%～150%.
3. high denitrogenation Round Sump Orbal oxidation ditch according to claim 1 and other biochemical process combine to handle the technology of leather waste water, it is characterized in that aeration rate and the ratio of the water yield in the described preaeration tank is 60: 1～5: 1.
4. high denitrogenation Round Sump Orbal oxidation ditch according to claim 1 and other biochemical process combine to handle the technology of leather waste water; It is characterized in that the sludge concentration in the aerobic biochemical pond is 4000～8000mg/L; Sludge concentration in the Round Sump Orbal oxidation ditch is 6000～11000mg/L, and the sludge concentration in the Round Sump Orbal oxidation ditch is greater than the sludge concentration in the aerobic biochemical pond.
5. high denitrogenation Round Sump Orbal oxidation ditch according to claim 1 and other biochemical process combine to handle the technology of leather waste water, it is characterized in that the pH value of the sewage in the aerobic biochemical pond is adjusted to 7～9.
6. high denitrogenation Round Sump Orbal oxidation ditch according to claim 5 and other biochemical process combine to handle the technology of leather waste water, it is characterized in that the pH value of the sewage in the aerobic biochemical pond is adjusted to 7.85.
7. combine to handle the technology of leather waste water according to claim 1,2,4,5 or 6 described high denitrogenation Round Sump Orbal oxidation ditches and other biochemical process, it is characterized in that described aerobic biochemical pond is a Carrousel oxidation ditch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101844247A CN101708920B (en) | 2009-08-14 | 2009-08-14 | Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101844247A CN101708920B (en) | 2009-08-14 | 2009-08-14 | Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101708920A CN101708920A (en) | 2010-05-19 |
| CN101708920B true CN101708920B (en) | 2012-04-18 |
Family
ID=42401732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101844247A Active CN101708920B (en) | 2009-08-14 | 2009-08-14 | Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101708920B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132184A (en) * | 1995-03-31 | 1996-10-02 | 成都华西环保科技公司 | Leather waste water treatment technique |
| US7442298B2 (en) * | 2006-01-26 | 2008-10-28 | Yixing Lingzhi Environmental Co., Ltd. | High-denitrification shared type orbal oxidation ditch |
| CN101318740A (en) * | 2008-07-18 | 2008-12-10 | 黄主榕 | Garbage leachate processing technique |
-
2009
- 2009-08-14 CN CN2009101844247A patent/CN101708920B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1132184A (en) * | 1995-03-31 | 1996-10-02 | 成都华西环保科技公司 | Leather waste water treatment technique |
| US7442298B2 (en) * | 2006-01-26 | 2008-10-28 | Yixing Lingzhi Environmental Co., Ltd. | High-denitrification shared type orbal oxidation ditch |
| CN101318740A (en) * | 2008-07-18 | 2008-12-10 | 黄主榕 | Garbage leachate processing technique |
Non-Patent Citations (3)
| Title |
|---|
| 张景彬.氧化沟工艺与制革废水处理.《皮革与化工》.2008,第25卷(第1期),32-35. * |
| 杨建军等.氧化沟工艺处理绵羊皮制革废水.《中国皮革》.2002,第31卷(第9期),5、6、9. * |
| 王淑莹等.内循环对Orbal氧化沟系统生物脱氮除磷的影响.《北京工业大学学报》.2008,第34卷(第5期),522-527. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101708920A (en) | 2010-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101560039B (en) | Landfill leachate wastewater treatment system and process thereof | |
| CN108298687B (en) | Biological denitrification method for landfill leachate | |
| CN107973498A (en) | A kind for the treatment of process and its processing system of high-concentration hardly-degradable pharmacy waste water | |
| CN102161553B (en) | Method for treating wastewater generated in preparation of biogas from kitchen waste | |
| US7001516B1 (en) | Process for removing phosphorus from wastewater utilizing a triple basin wastewater treatment system | |
| CN102674537A (en) | Reversed-order SBR (Sequencing Batch Reactor) water processing device and method for enhanced nitrogen removal | |
| CN202089870U (en) | Biological treatment device for hydroxyethyl cellulose industrial waste water | |
| CN101792230A (en) | Non-reflux continuous aeration type sewage treatment system and treatment method | |
| CN101659502B (en) | Method for treating waste leachate by utilizing high denitrification shared type Orbal oxidation ditch | |
| CN102115297A (en) | Double-reflux denitrification membrane-bioreactor (MBR) process for treating dry acrylic fiber waste water | |
| WO2020133553A1 (en) | Method for treating high ammonia-nitrogen wastewater of the coal chemical industry with reinforced sbr process pool | |
| CN105254134A (en) | Biological nitrogen removal combination device | |
| CN104478177B (en) | A kind of processing method of leather-making waste water | |
| CN104828945B (en) | A kind of method that low-carbon high-nitrogen starch wastewater is handled based on Modified SBR method | |
| CN104609659B (en) | A kind of method strengthening SBR PROCESS FOR TREATMENT coal chemical industrial waste water denitrification efficiency | |
| CN201406361Y (en) | Waste leachate waste water processing device | |
| CN203938562U (en) | A kind of short-cut nitrification and denitrification+MBR combination process waste disposal plant | |
| KR100814743B1 (en) | Removal of nitrogen and phosphate using small sewage treatment system with an anaerobic, anoxic, aerobic combined biofilters | |
| CN116002861A (en) | Built-in internal and external mixed liquid backflow two-stage anoxic-aerobic device and process for precipitation | |
| CN101708920B (en) | Process for treating leather waste water by combining high denitrification joint-type Orbal oxidation ditch and other biochemical processes | |
| KR20060004524A (en) | Method and apparatus for treatment of high-strength organic and nitrogenous wastewater | |
| CN204874193U (en) | Process hides advanced waste treatment system | |
| CN202465449U (en) | Wool scouring and sewage processing system | |
| CN209367927U (en) | A kind of high concentration organic nitrogen waste water dis posal equipment | |
| CN111620440A (en) | Method and equipment for treating low-carbon-nitrogen-ratio domestic sewage by using improved CASS-MBR process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 214205 Jiangsu, Yixing, Central Park Pacific Mansion, building 4 Applicant after: Ling Jianjun Co-applicant after: Jiangsu Lingzhi Municipal Engineering Design & Research Institute Co., Ltd. Co-applicant after: Nantong Orbel Engineering Technology Co., Ltd. Address before: 214205 Jiangsu, Yixing, Central Park Pacific Mansion, building 4 Applicant before: Ling Jianjun Co-applicant before: Wuxi Lianchuang Municipal Engineering Co., Ltd. Co-applicant before: Jiangsu Lingzhi Environmental Protection Equipment Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170420 Address after: 214205 Jiangsu, Yixing, Central Park Pacific Mansion, building 4 Co-patentee after: Jiangsu Lingzhi Municipal Engineering Design & Research Institute Co., Ltd. Patentee after: Lingzhi Environmental Protection Co., Ltd. Co-patentee after: Nantong Orbel Engineering Technology Co., Ltd. Address before: 214205 Jiangsu, Yixing, Central Park Pacific Mansion, building 4 Co-patentee before: Jiangsu Lingzhi Municipal Engineering Design & Research Institute Co., Ltd. Patentee before: Ling Jianjun Co-patentee before: Nantong Orbel Engineering Technology Co., Ltd. |