CN103159322B - PTA (Pure Terephthalic Acid) sewage anaerobic sludge granulating accelerant - Google Patents

PTA (Pure Terephthalic Acid) sewage anaerobic sludge granulating accelerant Download PDF

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CN103159322B
CN103159322B CN201310107010.0A CN201310107010A CN103159322B CN 103159322 B CN103159322 B CN 103159322B CN 201310107010 A CN201310107010 A CN 201310107010A CN 103159322 B CN103159322 B CN 103159322B
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pta
promotor
granular sludge
anerobic sowage
mass percent
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CN103159322A (en
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赵曦波
白岩君
王猛
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WEIHAI BC ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
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WEIHAI BC ENVIRONMENTAL PROTECTION ENGINEERING Co Ltd
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Abstract

The invention belongs to the field of environmental-friendly sewage treatment, and in particular to a PTA (Pure Terephthalic Acid) sewage anaerobic sludge granulating accelerant. The accelerant is characterized by comprising the components as follows: calcium salt for providing calcium ions Ca<2+>, sylvite for providing potassium ions K<+>, ferric salt for providing ferric ions F2<3+>, hydrolase, polyacrylamide and caustic starch, wherein the accelerant comprises the components in percentage by weight as follows: 15-20% of Ca<2+>, 10-155 of K<+>, 0.5-105% of F2<3+>, 0.1-0.2% of hydrolase, 0.15-0.25% of polyacrylamide and 1.0-1.5% of caustic starch. By adequately considering granulating mechanism of PTA sewage anaerobic sludge, the accelerant provided by the invention has the advantages of strong pertinence, simpleness in addition and use and the like.

Description

PTA anerobic sowage granular sludge promotor
Technical field
The invention belongs to environment protection sewage treatment area, particularly a kind of PTA anerobic sowage granular sludge promotor.
Background technology
Along with the increasing of domestic PTA factory construction quantity is built, the quantity of its supporting PTA waste disposal plant also constantly increases, and domestic PTA waste disposal plant generally adopts anaerobic and aerobic combined treatment process, and anaerobic system mostly adopts traditional UASB or improves UASB.Owing to containing terephthalic acid in PTA sewage, carboxyl benzaldehyde, p-methylbenzoic acid etc. is difficult for anaerobion degraded or anaerobion growth is had to inhibiting component, therefore the initial start-up cycle of UASB system is long, restarting effect is unstable, cause anaerobic reactor mud mostly with cotton-shaped, to exist, run off serious, supplement inoculation mud is to anaerobic reactor frequently.Unstable due to anaerobic system operation, causes aerobic system inlet COD loading high, and treatment effect reduces, and draining often exceeds standard.
Cause the factor of PTA sewage UASB system fluctuation of service except pollutant's content such as p-Xylol are high, it is inhibiting to the existence of carboxyl benzaldehyde and p-methylbenzoic acid that anaerobion growth is had, it is also an important factor that anaerobic reactor anaerobic sludge does not have granulating.The PTA sewage UASB reactor that running and comparing is stable, its anaerobic sludge granulating degree is all very high, and therefore improving UASB reactor anaerobic sludge granulating degree is to improve an important means of UASB operating performance.
At present for promoting the rare report of the granular medicament of anaerobic reactor anaerobic sludge, particularly for PTA anerobic sowage treatment system.
Summary of the invention
The object of the present invention is to provide and a kind ofly can improve PTA anerobic sowage reactor initial start-up efficiency and restarting anaerobic sludge granulating degree; guaranteeing has enough, granular anaerobic sludge in UASB system, improves the stability of PTA sewage UASB reactor restarting and the PTA anerobic sowage granular sludge promotor of wastewater treatment efficiency.
A PTA anerobic sowage granular sludge promotor, is characterized in that comprising following each component: for calcium ion Ca is provided 2+calcium salt, for potassium ion K is provided +sylvite, for iron ion Fe is provided 3+molysite, lytic enzyme, polyacrylamide and causticity starch.
Calcium ion Ca in the anerobic sowage of PTA described in the present invention granular sludge promotor 2+mass percent be 15 ~ 20%, potassium ion K +mass percent be 10 ~ 15%, iron ion Fe 3+mass percent be 0.5 ~ 1.5%, the mass percent of lytic enzyme is 0.1 ~ 0.2%, the mass percent of polyacrylamide is 0.15 ~ 0.25%, the mass percent of causticity starch is 1.0 ~ 1.5%
Calcium ion in the present invention can be by Calcium dichloride dihydrate CaCl 22H 2o provides, and potassium ion can be provided by potassium chloride (KCl), and iron ion can be by iron(ic) chloride FeCl 3provide.
PTA anerobic sowage granular sludge promotor of the present invention can be comprised of by following proportioning following component: Calcium dichloride dihydrate 65%-76%; Repone K 20%-30%, iron(ic) chloride 2.5%-3.4%, lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
PTA anerobic sowage granular sludge promotor of the present invention can be comprised of by following proportioning following component: Calcium dichloride dihydrate 66%-76%; Repone K 20%-30%, iron(ic) chloride 2.5%-3.4%, lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
PTA anerobic sowage granular sludge promotor of the present invention can be comprised of by following proportioning following component: Calcium dichloride dihydrate 66%-70%; Repone K 25%-30%, iron(ic) chloride 2.5%-3.4%, lytic enzyme 0.15%-0.2%; polyacrylamide 0.2%-0.25%, causticity starch 1.2%-1.4%.
PTA anerobic sowage granular sludge promotor of the present invention can be comprised of by following proportioning following component: Calcium dichloride dihydrate 65%-70%; Repone K 20%-28%, iron(ic) chloride 2.5%-5.2%, lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
The using method that the invention allows for a kind of PTA anerobic sowage granular sludge promotor as above, is characterized in that comprising the following steps:
Step 1: obtain solution, adopt service water or tap water to dissolve above-mentioned PTA anerobic sowage granular sludge promotor, the solution that acquisition mass percent is 3 ~ 8%,
Step 2: be added in anaerobic reactor water-in by dosage by volume pump.
The using method of the anerobic sowage of PTA described in the present invention granular sludge promotor; be applied to initial start-up and the restarting of PTA sewage tradition UASB reactor, follow-on UASB reactor, EGSB reactor, IC reactor; wherein initial start-up usage quantity is 0.8 ~ 1.5kg/t COD, and restarting usage quantity is 0.4 ~ 0.8 kg/t COD.
Beneficial effect of the present invention is:
In PTA anerobic sowage granular sludge promotor of the present invention, the curable part anaerobic sludge of calcium makes it to become the small tuberculosis of anaerobic bacteria flora, under the dual function of polyacrylamide and causticity starch, anaerobic bacteria flora is gathered in tuberculosis and to tuberculosis outgrowth, thereby form granular anaerobic sludge group, the electrolytical balance of the adjustable anaerobic bacteria flora of potassium and iron, synergy with lytic enzyme, further promoted the hydrolysis of TA, thereby also improved pollutent degradation effect in reactor, the raising of contaminant degradation effect, the growth of anaerobe flora has also increased volume and the proportion of anaerobic grain sludge, under UASB design current velocity, anaerobic sludge just can not run off with water outlet like this, guaranteed the sludge quantity of anaerobic reactor, thereby the operating performance of the anaerobic reactor improving.
The present invention has taken into full account PTA anerobic sowage granular sludge mechanism, with strong points, adds to use simply, can be applicable to the reactors such as UASB, EGSB, IC of PTA sewage disposal.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
Embodiment 1
5000 kilograms of a kind of PTA anerobic sowage granular sludge promotor of the present invention; (wherein calcic is 100 kilograms wherein to include 3800 kilograms of Calcium dichloride dihydrates; mass percent 20%); 1000 kilograms, Repone K is (wherein containing 500 kilograms, potassium; mass percent 10%); (wherein iron content is 25 kilograms for 125 kilograms, iron(ic) chloride; mass percent 0.5%); 7.5 kilograms of lytic enzymes (mass percent 0.15%); 7.5 kilograms of polyacrylamides (mass percent 0.15%), 60 kilograms of causticity starch (mass percent 1.2%).
Liaoning MouPTA factory waste disposal plant adopt pre-treatment+UASB+ aerobic+air-float technology.UASB system design parameters wherein: flooding quantity 400m 3/ h, influent COD 6000-8000mg/l, the COD 3.3-4.5kgCOD/m that loads 3.d, upper Flow Velocity 0.5m/h, COD clearance 60%.Corresponding UASB reactor 24*20*9 (10) m, totally 4.
Initial start-up anaerobic reactor adds PTA sewage aerobic excess sludge, chemical plant digested sludge, paper mill anaerobic sludge, adopt old PTA device COD of sewage 5000-6000mg/l, N and P add according to COD:N:P=580:7:1, and this medicament adds with 1.2kg/t COD.6 months initial start-up time, granular sludge degree 45% in UASB reactor.
Main device is driven, and PTA sewage enters UASB system, and restarting starts.Added amount of chemical 0.8kg/t COD of the present invention, following table is the restarting service data cartogram of 6 months
Time Amount of inlet water m 3/h Influent COD mg/l Water outlet CDO mg/l COD clearance %
First month 300 5645 2170 62
Second month 320 5749 2079 64
March 345 5688 1917 66
April 360 5461 1796 67
May 370 5544 1802 67
June 380 5970 1872 69
The PTA of this factory sewage UASB system is used medicament of the present invention, and COD clearance reached 69% in 6 months, higher than design 9%.This PTA sewage device anaerobic system reached the sewage device of 60% above clearance at that time for domestic first hand driving simultaneously.
Embodiment 2
5000 kilograms of a kind of PTA anerobic sowage granular sludge promotor of the present invention; (wherein calcic is 950 kilograms wherein to include 3500 kilograms of Calcium dichloride dihydrates; mass percent 19%); 1250 kilograms, Repone K is (wherein containing 650 kilograms, potassium; mass percent 13%); (wherein iron content is 35 kilograms for 170 kilograms, iron(ic) chloride; mass percent 0.7%); 7.5 kilograms of lytic enzymes (mass percent 0.15%); 12.5 kilograms of polyacrylamides (mass percent 0.25%), 60 kilograms of causticity starch (mass percent 1.2%).
Jiangsu MouPTA factory waste disposal plant adopts pre-treatment+improvement UASB+ two-stage aerobic+running sand filtration technique.Wherein improve UASB system design parameters: flooding quantity 350m 3/ h, influent COD 6000-8000mg/l, the COD 5.0-6.72kgCOD/m that loads 3.d, upper Flow Velocity 2-3m/h, COD clearance 75%.Corresponding UASB reactor 20*18*14 (15) m, totally 2.
Initial start-up anaerobic reactor adds PTA sewage aerobic excess sludge, configuration PTA COD of sewage 3000-4000mg/l, and N and P add according to COD:N:P=580:7:1, and this medicament adds with 1.2kg/t COD.4 months initial start-up time, the basic granulating of mud in UASB reactor.
Main device is driven, and PTA sewage enters UASB system, and restarting starts.Added amount of chemical 0.8kg/t COD of the present invention, following table is the restarting service data cartogram of 5 months
Time Amount of inlet water m 3/h Influent COD mg/l Water outlet CDO mg/l COD clearance %
First month 286 5674 1640 71
Second month 298 5632 1210 78
March 315 5639 954 83
April 312 5468 873 84
May 321 5567 769 84.3
The PTA of this factory sewage UASB system is used medicament of the present invention, and COD clearance reached 84.3% in 5 months, higher than design 9.3%.
Embodiment 3
3000 kilograms of a kind of PTA anerobic sowage granular sludge promotor of the present invention; (wherein calcic is 510 kilograms wherein to include 1950 kilograms of Calcium dichloride dihydrates; mass percent 17%); 840 kilograms, Repone K is (wherein containing 405 kilograms, potassium; mass percent 13.5%); (wherein iron content is 30 kilograms for 156 kilograms, iron(ic) chloride; mass percent 1.0%); 6 kilograms of lytic enzymes (mass percent 0.2%); 6 kilograms of polyacrylamides (mass percent 0.2%), 42 kilograms of causticity starch (mass percent 1.4%).
MouPTA factory waste disposal plant adopts pre-treatment+exterior circulation UASB+two-stage aerobic+air-float technology.UASB system design parameters wherein: flooding quantity 300m 3/ h, influent COD 6000mg/l, the COD 4.5kgCOD/m that loads 3.d, upper Flow Velocity 0.5-1.5m/h, COD clearance 75%.Corresponding UASB reactor 15*22.5*8 (9) m, totally 4.
After sewage device driving anaerobic system restarting, the average water yield 230m of system 3/ h, COD5100mg/l, because UASB system sludge does not have granulating, so system sludge runs off seriously, needs every year to supplement 4 left and right of mud, and 1/3rd to 1/2nd sewage need directly be bypassed to aerobic system, the anaerobic system average 120-160 m of intaking 3/ h, even if the COD clearance of UASB system only has 55% left and right like this, this situation continues about 4 years.
Added amount of chemical 1.0kg/t COD of the present invention, the UASB system operation data statistic of 3 months
Time Amount of inlet water m 3/h Influent COD mg/l Water outlet CDO mg/l COD clearance %
First month 160 5064 2150 57
Second month 190 5126 1829 64
March 220 5083 1298 74
The PTA of this factory sewage UASB system is used medicament of the present invention, and COD clearance reached 74% in 3 months, and water enters the anaerobic system water yield and progressively improves.By sludge character, analyze, in reaction, anaerobic sludge granulating degree has reached 30% left and right, goes out water suspension upper and lower at 260mg/l, and anaerobic sludge growth is run off and reached balance.The operating performance that UASB system sludge granulating degree direct influence UASB system is described thus, the use of this medicament has improved the granulating degree of anaerobic reactor mud, the growth of mud and the running balance of running off and realizing, the operating performance of the system improving thus.
Embodiment 4
5000 kilograms of a kind of PTA anerobic sowage granular sludge promotor of the present invention; (wherein calcic is 750 kilograms wherein to include 3300 kilograms of Calcium dichloride dihydrates; mass percent 15%); 1500 kilograms, Repone K is (wherein containing 750 kilograms, potassium; mass percent 15%); (wherein iron content is 25 kilograms for 125 kilograms, iron(ic) chloride; mass percent 0.5%); 7.5 kilograms of lytic enzymes (mass percent 0.15%); 7.5 kilograms of polyacrylamides (mass percent 0.15%), 60 kilograms of causticity starch (mass percent 1.2%).
Dalian MouPTA factory waste disposal plant adopts pre-treatment+exterior circulation UASB+two-stage aerobic+air-float technology.UASB system design parameters wherein: flooding quantity 700m 3/ h, influent COD 6000-8000mg/l, the COD 4.2-5.6kgCOD/m that loads 3.d, upper Flow Velocity 0.5m/h, COD clearance 70%.Corresponding UASB reactor 34*20*9 (10) m, totally 4.
After sewage device driving anaerobic system restarting, the average water yield 670m of system 3/ h, COD5896mg/l, because UASB system sludge does not have granulating, so system sludge increment is less than and runs off seriously, needs every year to supplement 2 left and right of mud, and 1/3rd sewage need directly be bypassed to aerobic system, anaerobic system average 450 m of intaking 3/ h, even if the COD clearance of UASB system only has 45% left and right like this, this situation continues about 1 year.
Added amount of chemical 1.0kg/t COD of the present invention, the UASB system operation data statistic of 5 months
Time Amount of inlet water m 3/h Influent COD mg/l Water outlet CDO mg/l COD clearance %
First month 480 5841 2889 51
Second month 520 5782 2790 52
March 560 5593 2584 54
April 590 5675 2467 57
May 620 5724 2240 61
The PTA of this factory sewage UASB system is used medicament of the present invention, and COD clearance reached 61% in 5 months, and water enters the anaerobic system water yield and progressively improves.By sludge character, analyze, in reaction, anaerobic sludge granulating degree has reached 32% left and right, goes out water suspension upper and lower at 350mg/l, and anaerobic sludge growth is run off and substantially reached balance.The operating performance that UASB system sludge granulating degree direct influence UASB system is described thus, the use of this medicament has improved the granulating degree of anaerobic reactor mud, the growth of mud and the running balance of running off and realizing, the operating performance of the system improving thus.

Claims (8)

1. a PTA anerobic sowage granular sludge promotor, is characterized in that comprising following each component: for calcium ion Ca is provided 2+calcium salt, for potassium ion K is provided +sylvite, for iron ion Fe is provided 3+molysite, lytic enzyme, polyacrylamide and causticity starch; Calcium ion Ca 2+mass percent be 15 ~ 20%, potassium ion K +mass percent be 10 ~ 15%, iron ion Fe 3+mass percent be 0.5 ~ 1.5%, the mass percent of lytic enzyme is 0.1 ~ 0.2%, the mass percent of polyacrylamide is 0.15 ~ 0.25%, the mass percent of causticity starch is 1.0 ~ 1.5%.
2. a kind of PTA anerobic sowage granular sludge promotor according to claim 1, is characterized in that calcium ion is by Calcium dichloride dihydrate CaCl 22H 2o provides, and potassium ion is provided by potassium chloride (KCl), and iron ion is by iron(ic) chloride FeCl 3provide.
3. a kind of PTA anerobic sowage granular sludge promotor according to claim 2; it is characterized in that described PTA anerobic sowage granular sludge promotor is comprised of by following proportioning following component: Calcium dichloride dihydrate 65%-76%; Repone K 20%-30%; iron(ic) chloride 2.5%-3.4%; lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
4. a kind of PTA anerobic sowage granular sludge promotor according to claim 2; it is characterized in that described PTA anerobic sowage granular sludge promotor is comprised of by following proportioning following component: Calcium dichloride dihydrate 66%-76%; Repone K 20%-30%; iron(ic) chloride 2.5%-3.4%; lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
5. a kind of PTA anerobic sowage granular sludge promotor according to claim 2; it is characterized in that described PTA anerobic sowage granular sludge promotor is comprised of by following proportioning following component: Calcium dichloride dihydrate 66%-70%; Repone K 25%-30%; iron(ic) chloride 2.5%-3.4%; lytic enzyme 0.15%-0.2%; polyacrylamide 0.2%-0.25%, causticity starch 1.2%-1.4%.
6. a kind of PTA anerobic sowage granular sludge promotor according to claim 2; it is characterized in that described PTA anerobic sowage granular sludge promotor is comprised of by following proportioning following component: Calcium dichloride dihydrate 65%-70%; Repone K 20%-28%; iron(ic) chloride 2.5%-5.2%; lytic enzyme 0.15%-0.2%; polyacrylamide 0.15%-0.25%, causticity starch 1.2%-1.4%.
7. a using method for the PTA anerobic sowage granular sludge promotor as described in any one in claim 1-6, is characterized in that comprising the following steps:
Step 1: obtain solution, adopt service water or tap water to dissolve above-mentioned PTA anerobic sowage granular sludge promotor, the solution that acquisition mass percent is 3 ~ 8%,
Step 2: be added in anaerobic reactor water-in by dosage by volume pump.
8. the using method of a kind of PTA anerobic sowage granular sludge promotor according to claim 7; the using method that it is characterized in that described PTA anerobic sowage granular sludge promotor; be applied to initial start-up and the restarting of PTA sewage tradition UASB reactor, follow-on UASB reactor, EGSB reactor, IC reactor; wherein initial start-up usage quantity is 0.8 ~ 1.5kg/t COD, and restarting usage quantity is 0.4 ~ 0.8 kg/t COD.
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CN104176890A (en) * 2014-09-17 2014-12-03 安徽省绿巨人环境技术有限公司 High-concentration industrial wastewater treatment method
CN104876332A (en) * 2015-05-06 2015-09-02 华东理工大学 Anaerobic granular sludge capable of reinforcing dechlorination performance and preparation method and application of anaerobic granular sludge
CN108017225A (en) * 2016-10-28 2018-05-11 中国石油化工股份有限公司 A kind of method of raising PTA sewage treating efficiencies
CN108002636A (en) * 2016-10-28 2018-05-08 中国石油化工股份有限公司 A kind of processing method of PTA sewage
CN108017147A (en) * 2016-10-28 2018-05-11 中国石油化工股份有限公司 A kind of anaerobic treatment method of PTA sewage

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