CN100391876C - Method for treating wastewater of terephthalic acid by using aerating bio filter - Google Patents
Method for treating wastewater of terephthalic acid by using aerating bio filter Download PDFInfo
- Publication number
- CN100391876C CN100391876C CNB2006100979027A CN200610097902A CN100391876C CN 100391876 C CN100391876 C CN 100391876C CN B2006100979027 A CNB2006100979027 A CN B2006100979027A CN 200610097902 A CN200610097902 A CN 200610097902A CN 100391876 C CN100391876 C CN 100391876C
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- Prior art keywords
- water
- filtration
- baf
- terephthalic acid
- filter
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- 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.)
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- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000002351 wastewater Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 239000010802 sludge Substances 0.000 claims abstract description 13
- 238000001556 precipitation Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims abstract description 5
- 238000011010 flushing procedure Methods 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 11
- 238000011001 backwashing Methods 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 5
- 230000000813 microbial effect Effects 0.000 claims description 4
- 238000000247 postprecipitation Methods 0.000 claims description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 231100000331 toxic Toxicity 0.000 claims description 3
- 230000002588 toxic effect Effects 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 4
- 241000894006 Bacteria Species 0.000 abstract description 3
- 238000005273 aeration Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000004060 metabolic process Effects 0.000 abstract description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
- 238000004075 wastewater filtration Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 3
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- -1 is a kind of common Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
This invention discloses a method for treating p-phthalic acid wastewater by using aeration biological filtration pool. The method comprises: (1) infusing p-phthalic acid wastewater into a precipitation pool for precipitation; (2) infusing precipitated wastewater the bottom of an aeration biological filtration pool, and entering the filtration layer through a filtration head in the filtration pool; (3) sending the discharged water into a filter for filtration; (4) discharging or recycling qualified discharged water. The filtration layer is filled with wastewater filtration filler, and is covered with a domesticated aerobic biological membrane that is adaptable for p-phthalic acid toxicity. The method utilizes filtration filler and biological membrane as the media, thus fully exploiting biological metabolism, physical filtration, physical adsorption by membrane and adsorbed filler, and multi-stage prey in the reactor to realize the removing of pollutants and bacteria in the same reactor. The method has such advantages as high bioactivity, low energy consumption, low residual sludge content, high organic load tolerance, stable operation, and simple management.
Description
One, technical field:
The invention belongs to field of environment engineering technology, be specifically related to a kind of method that adopts BAF to handle terephthalic acid wastewater.
Two, background technology:
Terephthalic acid (terephthalicacid, be called for short TA) is a kind of petrochemicals, is widely used in the production of synthesising fibre, plastics, dyestuff, is a kind of common, organic pollutant of biology being had certain toxic.Along with the development of modernization industry, the turnout of China TA and usage quantity surge have also produced a large amount of TA waste water simultaneously, handle the TA in the waste water effectively, are the problems that attracts people's attention always.
For high density TA wastewater treatment, generally adopt acid-precipitation method to handle, reclaim TA, reduce waste water COD
Cr(chemical oxygen demand (COD) is called for short COD
Cr).Its rate of recovery to TA can reach 70%～90%, COD
CrThe about 70-80% of clearance.But the waste water behind the acid out can not qualified discharge, generally can only be as the pre-treatment of high density TA waste water.
For middle lower concentration TA wastewater treatment, adopt acid-precipitation method uneconomical economically, main at present anaerobism or the aerobe of adopting handled.The anaerobic treatment process of using morely has UASB (up-flow anaerobic sludge blanket is called for short UASB), also has bacteria bed, hybrid anaerobic reactor etc.Anaerobic filter bed and UASB handle in the TA factory effluent process, and the TA influent concentration is 40～1800mg/L, and clearance is about 40%-50%.Decompose because TA is under anaerobic difficult, the turndown ratio of system is little, and the starting period is longer, and weak grade of ability of bearing load impact makes anaerobic treatment be difficult to steady running.U.S. AMOCO company and former Shanghai terylene two factories etc. adopt aerobic activated sludge process to handle TA waste water.Though treatment effect is better, but in operational process, there are TA waste water quality, water yield fluctuation greatly, organic concentration height, pH variation range are big, the biological organism that is difficult for degraded is more, usually causes therefore that sludge bulking, shock proof ability are weak, the big variety of problems of workload of disposal excess sludge.
Three, summary of the invention:
A kind of new biological purification method that the objective of the invention is to solve prior art processing terephthalic acid (TA) waste water deficiency and provide is produced its qualified discharge and recyclable being used for.
Technical scheme of the present invention may further comprise the steps:
1) at first terephthalic acid wastewater being injected the adjusting settling tank precipitates;
2) waste water of above-mentioned post precipitation injects the BAF bottom, enters filter material layer through inside, filter tank filter, and the sewage disposal filtrate is housed in the filter material layer, grows it on to have can adapt to the toxic aerobic biologic membrane of terephthalic acid through the domestication;
3) water outlet step 2) enters strainer and filters;
4) filter the back water outlet and reached general industry water water quality requirement, can directly discharge or reuse.
For waste water is recycled, can carry out step 2) simultaneously filter material layer is carried out air-water associating back flushing, the step of described air-water associating back flushing is:
A. earlier carry out the 5min back flushing with pressurized air,
B. restart backwash pump, air water back flushing simultaneously 5min,
C. use water backwashing 5-8min at last again,
Its gas-water ratio 5～10, backwashing period are 2d～3d, and back washing strength is 5L/ (m
2S)～8L/ (m
2S), 15 ℃～30 ℃ of temperature, pH value 7.0～8.5, sludge loading 1.6kgCOD
Cr/ (kgMLSSd)～3.6kgCOD
Cr/ (kgMLSSd), filtering velocity 0.5m
3/ (hm
2)～2.0m
3/ (hm
2).
Impurity such as the microbial film that back flushing comes off in the above-mentioned steps, mud are back to the back flushing draining and regulate the settling tank precipitation, the mud of post precipitation is pressed into fertile mud cake outward transport through concentration basin, plate-and-frame filter press and burns, and concentration basin concentrated solution and plate-and-frame filter press pressing filtering liquid readjustment joint precipitation.
For the back flushing current are provided, can make step 2) water outlet be introduced into a back flushing pond, wherein the part water outlet is pumped into BAF again as backwash water, all the other water outlets then enter strainer and filter.
Described step 2) the filter material layer filling is the lytag filtrate in the BAF in, and specification is particle diameter 3mm-5mm, tap density 0.70g/cm
3-0.90g/cm
3, percentage of damage＜0.07%, specific surface area 4.8m
2/ g-6.8m
2/ g, porosity 30%-40%, wear rate＜5.3%, hydrochloric acid soluble rate＜0.5%.
Filling is coke granule in the strainer of described step 3), and its particle diameter is 2mm-4mm.
This processing method has utilized the filtrate of BAF inner filling and the microbial film of apposition growth thereof to be treatment media, give full play to the physical adsorption effect and the interior multistage predation of food of reactor of biological metabolism effect, physical filtering effect, film and film and filler, realization pollutent and bacterium are removed in same unitary reactor.Deficiencies such as characteristics such as the high and low energy consumption of biologically active, surplus sludge volume is few, the organic loading ability to bear is strong, stable, simple and convenient management, the thread fungus that can effectively control the generation of Wastewater Treated by Activated Sludge Process TA waste water expand, system's impact resistance is weak.
The present invention has construction investment and economizes, and takes up an area of and lacks, and working cost is low, and treating water can qualified discharge or reuse.Overcome the deficiency of anaerobic and aerobic activated sludge processes.Day to handle 1000m
3Containing TA wastewater treatment scale is example, if handle by traditional acid out → neutralization → one section anaerobism → two sections aerobic process, up to standard for making water quality treatment, about 1,000,000 yuans of its total investment of engineering takes up an area of about 5000m
2, the direct about 2.8 yuan/m of working cost
3If adopt the present invention, adopt one-level BAF biopurification processing and cascade filtration process combined technology, can make construction investment reduce to 650,000 yuans, taking up an area of only need about 2800m
2, the about 1.65 yuan/m of working cost
3
Four, description of drawings:
Fig. 1: biological aerated filter process is handled the terephthalic acid wastewater schema
Numeral among the figure: 1-regulates settling tank; The 2-water pump; The 3-BAF; The 4-roots blower; 5-back flushing pond; The 6-backwash pump; The 7-strainer; The 8-sludge thickener; The 9-plate-and-frame filter press
Five, embodiment:
Terephthalic acid of the present invention (TA) biological purification of effluent technology, the technology of cascade filtration after the employing one-level BAF biopurification earlier, its technical process is as shown in Figure 1.This technology is as follows: TA waste water enters filter material layer through regulating the bottom of settling tank 1 by water pump 2 injection BAF 3 through inside, pond strainer head, carries out aeration aerating by roots blower 4 to filter material layer simultaneously, and water outlet enters strainer 7 through back flushing pond 5; Strainer 7 water outlets have reached general industry water water quality requirement, can directly discharge or reuse.Air-water associating back flushing is adopted in the back flushing of BAF 3, method is that the pressurized air that provides with roots blower 4 earlier carries out the 5min back flushing, restart backwash pump 6, air water back flushing simultaneously 5min, last water is turned one's coat and is washed 5min-8min, and backwash water adopts the treat effluent of BAF 3; Impurity such as the microbial film that back flushing comes off, mud are back to the back flushing draining and regulate settling tank 1, and the mud of precipitation burns through concentration basin 8,9 one-tenth fertile mud cake outward transports of plate-and-frame filter press, concentration basin concentrated solution, plate-and-frame filter press pressing filtering liquid readjustment joint settling tank 1.Gas-water ratio 5～10, backwashing period are 2d～3d, air-water associating back flushing, and back washing strength is 5L/ (m
2S)～8L/ (m
2S), backwashing time is 10min～15min, 15 ℃～30 ℃ of temperature, pH value 7.0～8.5, sludge loading 1.6kgCOD
Cr/ (kgMLSSd)～3.6kgCOD
Cr/ (kgMLSSd), filtering velocity 0.5m
3/ (hm
2)～2.0m
3/ (hm
2).Under this processing parameter, it is to the TA in the TA waste water, COD
CrAverage removal rate reaches respectively more than 90% and 85%, and effluent quality has reached the I level emission standard in the integrated wastewater discharge standard (GB8978-1996), can directly discharge or reuse.BAF filter material layer filling high porosity, high-specific surface area, particle diameter are 3mm-5mm lytag filtrate, and its specification is particle diameter 3mm-5mm, tap density 0.70g/cm
3-0.90g/cm
3, percentage of damage＜0.07%, specific surface area 4.8m
2/ g-6.8m
2/ g, porosity 30%-40%, wear rate＜5.3%, hydrochloric acid soluble rate＜0.5%.
What adopt in test is that planar dimension is R=3000mm, height H
0In the circular BAF of=3700mm, be filled with and highly be the ceramic grain filter of H=2000mm, the height h of distributing water room
1=600mm, supporting layer height h
2=300mm, clear water zone height h
3=500mm, superelevation h
4=300mm is as sludge loading 3.3kgCOD
Cr/ (kgMLSSd), filtering velocity 1.5m
3/ (hm
2), gas-water ratio 4: 1 o'clock can be with 1000m
3TA in the/d waste water, COD
CrReduce to 2.81mg/L, 38.31mg/L from 205.2mg/L, 395.7mg/L.Table 1 is for adopting several embodiment of this art breading TA waste water.
Table 1 adopts biological clarification to handle TA waste water effect embodiment
Claims (6)
1. method that adopts BAF to handle terephthalic acid wastewater, it is characterized in that: it may further comprise the steps:
1) at first terephthalic acid wastewater being injected the adjusting settling tank precipitates;
2) waste water of above-mentioned post precipitation injects the BAF bottom, enters filter material layer through inside, filter tank filter, and the sewage disposal filtrate is housed in the filter material layer, on the filtrate long have can adapt to the toxic aerobic biologic membrane of terephthalic acid through the domestication;
3) water outlet step 2) enters strainer and filters;
4) filter the back water outlet and reached general industry water water quality requirement, can directly discharge or reuse.
2. employing BAF according to claim 1 is handled the method for terephthalic acid wastewater, it is characterized in that: carry out step 2) simultaneously filter material layer is carried out air-water associating back flushing, the step of described air-water associating back flushing is:
A. earlier carry out the 5min back flushing with pressurized air,
B. restart backwash pump, air water back flushing simultaneously 5min,
C. use water backwashing 5-8min at last again,
Its gas-water ratio 5～10, backwashing period are 2d～3d, and back washing strength is 5L/ (m
2S)～8L/ (m
2S), 15 ℃～30 ℃ of temperature, pH value 7.0～8.5, sludge loading 1.6kgCOD
Cr/ (kgMLSSd)～3.6kgCOD
Cr/ (kgMLSSd), filtering velocity 0.5m
3/ (hm
2)～2.0m
3/ (hm
2).
3. employing BAF according to claim 2 is handled the method for terephthalic acid wastewater, it is characterized in that: microbial film that back flushing comes off and mud impurity are back to the back flushing draining and regulate the settling tank precipitation, the mud of post precipitation is pressed into fertile mud cake outward transport through concentration basin, plate-and-frame filter press and burns, and concentration basin concentrated solution and plate-and-frame filter press pressing filtering liquid readjustment joint precipitation.
4. handle the method for terephthalic acid wastewaters according to claim 2 or 3 described employing BAF, it is characterized in that: step 2) water outlet be introduced into the back flushing pond, wherein the part water outlet is pumped into BAF again as backwash water, and all the other water outlets then enter strainer and filter.
5. employing BAF according to claim 1 is handled the method for terephthalic acid wastewater, it is characterized in that: the filter material layer filling is the lytag filtrate in the BAF described step 2), lytag filtrate specification is particle diameter 3mm-5mm, tap density 0.70g/cm
3-0.90g/cm
3, percentage of damage＜0.07%, specific surface area 4.8m
2/ g-6.8m
2/ g, porosity 30%-40%, wear rate＜5.3%, hydrochloric acid soluble rate＜0.5%.
6. employing BAF according to claim 1 and 2 is handled the method for terephthalic acid wastewater, it is characterized in that: filling coke granule in the strainer of described step 3), its particle diameter is 2-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100979027A CN100391876C (en) | 2006-11-21 | 2006-11-21 | Method for treating wastewater of terephthalic acid by using aerating bio filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100979027A CN100391876C (en) | 2006-11-21 | 2006-11-21 | Method for treating wastewater of terephthalic acid by using aerating bio filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1958484A CN1958484A (en) | 2007-05-09 |
| CN100391876C true CN100391876C (en) | 2008-06-04 |
Family
ID=38070354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100979027A Expired - Fee Related CN100391876C (en) | 2006-11-21 | 2006-11-21 | Method for treating wastewater of terephthalic acid by using aerating bio filter |
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|---|---|
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204586B (en) * | 2013-03-08 | 2014-01-15 | 北京工业大学 | Method for backwashing completely autotrophic nitrogen-removal process biofilter |
| CN103787553A (en) * | 2014-02-12 | 2014-05-14 | 苏州龙杰特种纤维股份有限公司 | Chemical fiber wastewater treatment process |
Citations (2)
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|---|---|---|---|---|
| CN1686863A (en) * | 2005-04-05 | 2005-10-26 | 太原理工大学 | Technique of biological treatment for wastewater of carbonization |
| CN1792896A (en) * | 2005-10-28 | 2006-06-28 | 华南理工大学 | Process and apparatus for treating petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool |
-
2006
- 2006-11-21 CN CNB2006100979027A patent/CN100391876C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686863A (en) * | 2005-04-05 | 2005-10-26 | 太原理工大学 | Technique of biological treatment for wastewater of carbonization |
| CN1792896A (en) * | 2005-10-28 | 2006-06-28 | 华南理工大学 | Process and apparatus for treating petrochemical sewage by coupling ozone oxidation in aerating biological filtering pool |
Non-Patent Citations (4)
| Title |
|---|
| 曝气生物滤池在石化污水处理工程中的应用. 汤苏云，朱元臣.油气田环境保护，第2期. 2006 |
| 曝气生物滤池在石化污水处理工程中的应用. 汤苏云，朱元臣.油气田环境保护，第2期. 2006 * |
| 混凝沉淀-曝气生物滤池-纳米材料复合膜技术在印染废水回用处理中的应用. 朱乐辉，魏善彪，邵莉，董瑞斌.水处理技术，第32卷第7期. 2006 |
| 混凝沉淀-曝气生物滤池-纳米材料复合膜技术在印染废水回用处理中的应用. 朱乐辉，魏善彪，邵莉，董瑞斌.水处理技术，第32卷第7期. 2006 * |
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|---|---|
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