CN105330020A - Synchronous biochemical advanced oxidation liquid waste treatment method and device - Google Patents
Synchronous biochemical advanced oxidation liquid waste treatment method and device Download PDFInfo
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- CN105330020A CN105330020A CN201510748085.6A CN201510748085A CN105330020A CN 105330020 A CN105330020 A CN 105330020A CN 201510748085 A CN201510748085 A CN 201510748085A CN 105330020 A CN105330020 A CN 105330020A
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Abstract
The invention discloses a synchronous biochemical advanced oxidation liquid waste treatment method and device. The device comprises a biological reaction tower and a gas dissolution pump. The gas dissolution pump is communicated with a water suction pipe on the top of the biological reaction tower and a through hole water pipe at the bottom of the biological reaction tower. The gas dissolution pump is used for pumping liquid waste from a water collection pool into the biological reaction tower to drive water circulation inside the tower. Two packing layers are arranged inside the biological reaction tower, wherein granular catalysis biological packing is placed on the upper layer, and suspension packing is placed on the lower layer. The granular catalysis biological packing is placed in the middle of the biological reaction tower, the water through water pipe is arranged at the bottom of the tower, and an ultrasonic transducer amplitude-change pole is placed above the biological reaction tower; the processing capacity is high, organic loads are high, the processing effect is 2-3 times higher than that of processing technologies of the same kind, the device has the advantages of being low in investment, small in occupied land and the like, the advanced oxidation technology, the ultrasonic decomposition technology and microbiological degradation technology are integrated, and the device has the advantages of being easy and convenient to operate and maintain, high in purification efficiency, low in investment and operation cost and the like, and is particularly applicable to processing organic liquid waste hard to degrade on the condition of intensified land occupation.
Description
Technical field
The invention belongs to technical field of sewage, relate to the treatment technology of high salt, high concentration hard-degraded organic waste water, particularly relate to a kind of biochemical synchronization advanced oxidation and to dispose waste liquid method and device.
Background technology
At present, treatment technology for high salt, high concentration hard-degraded organic waste water is more, conventional has advanced oxidation processes, physico-chemical process, biological process etc., wherein advanced oxidation processes generally comprises Fenton, catalytic wet oxidation, physical field work in coordination with the technology such as advanced oxidation, biochemical process generally comprises anaerobism, hold concurrently oxygen and aerobic treatment technology, several technology respectively has advantage above, is applicable to the process of the organic waste water of different occasion respectively, can reach preferably effect by reasonable employment.But also there is respective defect simultaneously, be embodied in:
(1) conventional high-level oxidation technology investment is large, working cost is high, particularly then larger in high salt, high concentration hard-degraded organic waste water treating processes, but be also difficult to process qualified discharge, subsequent biochemical (or other technologies) facility must be had, adopt physical field collaborative (as ultrasonic, ultraviolet, microwave) although can fast reaction speed and improve clearance, but still be difficult to guarantee qualified discharge, and physical field general left and right distance is shorter, and the reaction unit effect larger for diameter is poor;
(2) no matter biochemical process process height salt, high concentration hard-degraded organic waste water adopt anaerobism, hold concurrently oxygen or aerobic treatment technology, all often be difficult to cultivation or the problems such as ability that are hit, though working cost comparatively high-level oxidation technology is low, but investment cost is higher, it is large to take up an area, and the waste liquid tackling COMPLEX MIXED pollutent is often difficult to up to standard.In addition in water, hardly degraded organic substance is difficult to decompose or utilize, and even has side effect to denitrification without contribution.Often lacking the trace elements such as Mg, Zn, Mo, Co, Mn and the Fe needed for bacteria metabolism in waste water, is also the major reason causing biochemical effects not good;
(3) processing mode biochemical after adopting first advanced oxidation at present more, with this predecomposition partial organic substances or make it to be converted into the labile small organic molecule of microorganism, but the investment of this process combination, occupation of land and working cost are all higher, and advanced oxidation uses strong oxidizer to produce detrimentally affect to subsequent biochemical (especially anaerobism);
Conventional monotechnics has been difficult to make high salt, high concentration hard-degraded organic waste water discharge the environmental requirement reaching increasingly stringent, under the new situation, consider the combination between different technologies, even be incorporated in same reaction unit, to display one's respective advantages, overcome respective shortcoming, guarantee qualified discharge.
Summary of the invention
The object of the invention is to the defect solving the existence of above-mentioned prior art, provide a kind of and can be widely used in the high salt of process, the biochemical synchronization advanced oxidation of high concentration hard-degraded organic waste water disposes waste liquid method and device.
The present invention adopts following scheme:
A kind of biochemical synchronization advanced oxidation disposes waste liquid device, comprise biological respinse tower and air dissolved pump, the water absorption tube of air dissolved pump and biological respinse top of tower and the perforation cross current of biological respinse tower bottom, the liquid feeding end of air dissolved pump 1 is connected with the water collecting basin for taking up waste water, the built-in two-layer packing layer of biological respinse tower, upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 1-10%, and lower floor accounts for the long-pending 30-50% hanging filler of biological respinse tower body; Particulate catalyst biologic packing material is placed on biological respinse tower mid-way, apart from biological respinse tower bottom 20 ~ 100cm below hanging filler, places ultrasonic transducer horn above biological respinse tower.
Organic substance decomposing is CO by organism in particulate catalyst biologic packing material layer catalyzed oxidation decomposing wasting liquid
2, H
2o or be converted into the small-molecule substance be easily decomposed by the microorganisms.
Further, described hanging filler adopts common biological filler for water treatment to comprise soft-filler, semi soft packing, 3 D elastic filler, at least one had in the strip biologic packing material of far infrared self heating function.Particularly, described suspension biologic packing material can be carbon fiber filler.
Hang in biochemical reaction tower in the strip biologic packing materials such as far infrared biologic packing material, soft-filler, semi soft packing, 3 D elastic filler every 10 ~ 25cm one or more; Hang above biologic packing material and the high particulate catalyst biologic packing material layer of one deck 10 ~ 30cm is set; The tank base hanging biologic packing material distance catalyze biochemical reactor is 20 ~ 100cm; Preferably, one or more combinations in above-mentioned various filler can be set in biochemical reaction tower.
Further, the ultrasonic power of described ultrasonic transducer horn is 0.1-10KW, and frequency is 10-100KHz.
Further, the material of described particulate catalyst biologic packing material layer is the natural minerals of carrying transition metal oxide compound.
Further, described transition metal oxide is at least one in manganese, cobalt, molybdenum, iron, zinc metal oxide, and described natural minerals is at least one in the loose porous mineral material such as zeolite, volcanized rock, tourmalinite, attapulgite, expanded vermiculite, pearlstone, wilkinite, diatomite.
Particulate catalyst biologic packing material layer has catalyzed oxidation decomposing organic matter simultaneously and provides the function of the required trace element of microorganism growth, its keying action can accelerate to decompose the organism be dissolved in waste water, Direct Resolution is CO2, H2O or is converted into the small-molecule substance be easily decomposed by the microorganisms, thus accelerate to reduce organic concentration in waste water, be beneficial to the organism in constant absorption waste water.
Further, described biological respinse tower side wall offers and observes the 10cm of state in biological respinse tower show on trial.
Further, described air dissolved pump is provided with under meter.
Further, described air dissolved pump is connected with timer.
Further, described particulate catalyst biologic packing material is placed in biological respinse tower by 100 eye mesh screens.
Further, be added with in described biological respinse tower through cultivating the microorganism tamed and degrade to pollutent, microorganism carries out oxidative degradation to the organism of spray-absorption.Particularly, microbial adherence, in described suspension biologic packing material, is conducive to the organism in decomposing wasting liquid.By hanging biologic packing material, particulate catalyst biologic packing material layer and microorganism acting in conjunction, be conducive to the effect strengthening decomposing organic matter.Superior microorganism through cultivation domestication is sewage disposal common technology.
A kind of biochemical synchronization advanced oxidation disposes waste liquid method, comprises the following steps:
The first step, waste water elder generation is by air dissolved pump from water collecting basin suction biological respinse tower, and aspiration procedure is aeration simultaneously;
Second step, biological respinse tower adopt sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 0.5-3d, period aeration and rest time than being 1-4:1; Open ultrasonic transducer horn at the end of each aeration, work after 1-20 minute and stop;
After 3rd step, treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge accounts for the long-pending 20-60% of biological respinse tower body, after discharge, closes water discharge valve, completes a treatment cycle.
The present invention adopts 1m
3/ h air dissolved pump cyclic aeration, each aeration time 5-7h, rest time, 1-3h, hocketed, and controlled dissolved oxygen within 2ppm.Treatment effect: COD clearance 58-82%, ammonia nitrogen removal frank 75-99.4%, nitrogen removal rate 72-82%.
Further, biological respinse tower is equipped with the air dissolved pump of corresponding discharge, fluid level controller, dissolved oxygen on-line computing model and ORP on-line computing model.
Beneficial effect of the present invention:
1) processing power is strong, and organic loading is high, and treatment effect, higher than 2-3 times of similar treatment process, has less investment, takes up an area the advantages such as few.
2) pump is dual-purpose, and 10-30% falls in power consumption, and avoid conventional aeration facility blocking cause the large degradation problem for the treatment of effect.
3) extremely strong stability and restorability is had to various impact load, special suitable treatment " four is high " waste water (high COD, high ammonia nitrogen, high salt, high toxicity).
4) hardly degraded organic substance and partial sludge are converted into the carbon source needed for denitrification, avoid denitrification supplementary carbon source.
5) at NH
3in-N≤2g/L situation, without the need to the pre-treatment such as ammonia still process, stripping facility, significantly reduce initial outlay and working cost thus.
6) the present invention integrates advanced oxidation, ultrasonic decomposition and microbial decomposition technology, has that simple and convenient operation and maintenance, purification efficiency are high, investment and an advantage such as working cost is low, is particularly useful for the organic wastewater with difficult degradation thereby process under land used stressful situation.
Accompanying drawing explanation
Fig. 1 is that biochemical synchronization advanced oxidation of the present invention disposes waste liquid the structural representation of device;
Fig. 2 is the vertical view of Fig. 1;
Reference numeral:
1-air dissolved pump; 2-under meter; 3-ultra-sonic generator; 4-10cm shows on trial; 5-Mgs; 6-100 eye mesh screen; 7-timer; 8-carbon fiber filler.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below technical scheme in the present invention be clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
embodiment 1.
As depicted in figs. 1 and 2, the biochemical synchronization advanced oxidation of the present invention device that disposes waste liquid comprises biological respinse tower and air dissolved pump 1, air dissolved pump 1 and the water absorption tube of biological respinse top of tower and the perforation cross current of biological respinse tower bottom, air dissolved pump 1 for by waste water from water collecting basin suction biological respinse tower or order about water cycle in tower, the built-in two-layer packing layer of biological respinse tower, upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 1%, and lower floor accounts for 30% hanging filler that biological respinse tower body amasss as the carbon fiber filler 8 in Fig. 1; Particulate catalyst biologic packing material is placed on biological respinse tower mid-way, apart from biological respinse tower bottom 20cm below hanging filler, perforation water pipe put by tower base fabric, places ultrasonic transducer horn above biological respinse tower, and ultra-sonic generator 3 is installed on ultrasonic transducer horn top.
Described hanging filler adopts common biologic packing material to be carbon fiber filler 8.The ultrasonic power of ultrasonic transducer horn is 0.1KW, and frequency is 10KHz.The 10cm that biological respinse tower side wall offers state in observation biological respinse tower shows on trial 4, air dissolved pump 1 is provided with under meter 2, and biological respinse tower respectively exports and controls to open and close by Mgs 5.
Further, particulate catalyst biologic packing material is placed in biological respinse tower by 100 eye mesh screens 6, and air dissolved pump 1 is also connected with timer 7, is added with through cultivating the microorganism tamed and degrade to pollutent in biological respinse tower.
Biochemical synchronization advanced oxidation of the present invention disposes waste liquid method, comprises the following steps:
The first step, waste water elder generation is by air dissolved pump 1 from water collecting basin suction biological respinse tower, and aspiration procedure is aeration simultaneously;
Second step, biological respinse tower adopt sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 0.5d, period aeration and rest time than being 1:1; Open ultrasonic transducer horn at the end of each aeration, work after 2 minutes and stop;
After 3rd step, treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 20%, after discharge, close water discharge valve, complete a treatment cycle.
Further, biological respinse tower is equipped with the air dissolved pump of corresponding discharge, fluid level controller, dissolved oxygen on-line computing model and ORP on-line computing model.
Waste water is containing various organism and inorganics, and organism is as volatile organic matters such as alcohol, ketone, aldehyde, carboxylic acid, lipid, amine, hydro carbons (containing aromatic hydrocarbon, halohydrocarbon etc.), heterocycles, and COD content is at 0-10g/m
3; Inorganics refers to ammonia nitrogen, total nitrogen and heavy metal etc., and wherein ammonia nitrogen, total nitrogen content are at 0-2g/m
3.
Above reaction tower, top, approximately level place arranges water absorption tube, gets back to bottom reaction tower by the ultra-fine bubble dissolved air water of the gentle formation of air dissolved pump cyclic suction water, and perforated water pipe discharges;
Biological respinse tower of the present invention adopts SBR operational mode, i.e. sequence batch (process, arranges alternative aeration, quiescing process in every batch processed process, and control process dissolved oxygen arranges anaerobism, hold concurrently oxygen and the treating processes such as aerobic.
embodiment 2.
The difference of the present embodiment and embodiment 1 is: the material of the described particulate catalyst biologic packing material layer of the present embodiment is the natural minerals of carrying transition metal oxide compound.Described transition metal oxide is manganese metal oxide, and described natural minerals is attapulgite.Described suspension type biologic packing material comprises the far infrared biologic packing material of strip and high soft-filler.
Upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 3%, and lower floor accounts for 35% long-pending hanging filler of biological respinse tower body; Apart from biological respinse tower bottom 40cm below hanging filler; The ultrasonic power of ultrasonic transducer horn is 0.3KW, and frequency is 20KHz.
Biological respinse tower adopts sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 1d, period aeration and rest time than being 2:1; Open ultrasonic transducer horn at the end of each aeration, work after 5 minutes and stop; After treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 25%.
All the other contents of the present embodiment are identical with embodiment 1, repeat no more here.
embodiment 3.
The difference of the present embodiment and embodiment 1 is: the described suspension type biologic packing material of the present embodiment comprises far infrared biologic packing material and the soft-filler of strip.Described transition metal oxide is cobalt metal oxide, and described natural minerals is expanded vermiculite.
Upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 5%, and lower floor accounts for 40% long-pending hanging filler of biological respinse tower body; Apart from biological respinse tower bottom 50cm below hanging filler; The ultrasonic power of ultrasonic transducer horn is 0.5KW, and frequency is 40KHz.
Biological respinse tower adopts sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 1.5d, period aeration and rest time than being 3:1; Open ultrasonic transducer horn at the end of each aeration, work after 8 minutes and stop; After treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 30%.
All the other contents of the present embodiment are identical with embodiment 1, repeat no more here.
embodiment 4.
The difference of the present embodiment and embodiment 1 is: the described suspension type biologic packing material of the present embodiment comprises far infrared biologic packing material and the semi soft packing of strip.Described transition metal oxide is molybdenum oxide compound, the mixture of described natural minerals to be wilkinite, diatomite with mass ratio be 1:1.
Upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 6%, and lower floor accounts for 45% long-pending hanging filler of biological respinse tower body; Apart from biological respinse tower bottom 60cm below hanging filler; The ultrasonic power of ultrasonic transducer horn is 0.6KW, and frequency is 50KHz.
Biological respinse tower adopts sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 2d, period aeration and rest time than being 2:1; Open ultrasonic transducer horn at the end of each aeration, work after 10 minutes and stop; After treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 40%.
All the other contents of the present embodiment are identical with embodiment 1, repeat no more here.
embodiment 5.
The difference of the present embodiment and embodiment 1 is: the described suspension type biologic packing material of the present embodiment comprises the far infrared biologic packing material of strip, soft-filler and high soft-filler.The mixed metal oxide of described transition metal oxide to be manganese and zinc with mass ratio be 2:1, the mixture of described natural minerals to be zeolite, volcanized rock, tourmalinite with mass ratio be 1:1:2.
Upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 8%, and lower floor accounts for 50% long-pending hanging filler of biological respinse tower body; Apart from biological respinse tower bottom 80cm below hanging filler; The ultrasonic power of ultrasonic transducer horn is 0.7KW, and frequency is 60KHz.
Biological respinse tower adopts sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 2.5d, period aeration and rest time than being 4:1; Open ultrasonic transducer horn at the end of each aeration, work after 15 minutes and stop; After treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 50%.
All the other contents of the present embodiment are identical with embodiment 1, repeat no more here.
embodiment 6
The difference of the present embodiment and embodiment 1 is: the described suspension type biologic packing material of the present embodiment comprises the far infrared biologic packing material of strip, high soft-filler and 3 D elastic filler.The mixed metal oxide of described transition metal oxide to be manganese, cobalt and iron, zinc with mass ratio be 3:1:1, the mixture of described natural minerals to be zeolite, volcanized rock, tourmalinite, attapulgite with mass ratio be 1:1:1:2.
Upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 10%, and lower floor accounts for 40% long-pending hanging filler of biological respinse tower body; Apart from biological respinse tower bottom 100cm below hanging filler; The ultrasonic power of ultrasonic transducer horn is 0.8KW, and frequency is 100KHz.
Biological respinse tower adopts sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 3d, period aeration and rest time than being 2:1; Open ultrasonic transducer horn at the end of each aeration, work after 20 minutes and stop; After treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge account for biological respinse tower body long-pending 60%.
All the other contents of the present embodiment are identical with embodiment 1, repeat no more here.
application examples:
This combination technique equipment is adopted to process to the percolate of Dongguan garbage power plant.Technological design air quantity is 1m
3/ the cycle, it within 2 days, is one-period, tower is of a size of Φ 1000*4000, the particulate catalyst biologic packing material that wherein built-in one deck 200mm is high, combined stuffing (soft-filler, semi soft packing, 3 D elastic filler, at least one had in the strip biologic packing material of far infrared self heating function) hangs in lower floor, the ultrasonic transducer horn of 20KHz homogeneous radiation is placed in top, every task 1-8 minute, adopts 1m
3/ h air dissolved pump cyclic aeration, each aeration time 6h, rest time, 2h, hocketed, and controlled dissolved oxygen within 2ppm.Treatment effect: COD clearance 58-82%, ammonia nitrogen removal frank 75-99.4%, nitrogen removal rate 72-82%.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a biochemical synchronization advanced oxidation disposes waste liquid device, it is characterized in that: comprise biological respinse tower and air dissolved pump, the water absorption tube of air dissolved pump and biological respinse top of tower and the perforation cross current of biological respinse tower bottom, the liquid feeding end of air dissolved pump is connected with the water collecting basin for taking up waste water, the built-in two-layer packing layer of biological respinse tower, upper strata is account for the particulate catalyst biologic packing material that biological respinse tower body amasss 1-10%, and lower floor accounts for the long-pending 30-50% hanging filler of biological respinse tower body; Particulate catalyst biologic packing material is placed on biological respinse tower mid-way, apart from biological respinse tower bottom 20 ~ 100cm below hanging filler, places ultrasonic transducer horn above biological respinse tower.
2. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: described hanging filler comprises soft-filler, semi soft packing, 3 D elastic filler, at least one had in the strip biologic packing material of far infrared self heating function.
3. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: the ultrasonic power of described ultrasonic transducer horn is 0.1-10KW, and frequency is 10-100KHz.
4. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: the material of described particulate catalyst biologic packing material layer is the natural minerals of carrying transition metal oxide compound.
5. biochemical synchronization advanced oxidation according to claim 4 disposes waste liquid device, it is characterized in that: described transition metal oxide is at least one in manganese, cobalt, molybdenum, iron, zinc metal oxide, described natural minerals is at least one in the loose porous mineral material such as zeolite, volcanized rock, tourmalinite, attapulgite, expanded vermiculite, pearlstone, wilkinite, diatomite.
6. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: described particulate catalyst biologic packing material is placed in biological respinse tower by 100 eye mesh screens.
7. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: the 10cm that described biological respinse tower side wall offers state in observation biological respinse tower shows on trial, described air dissolved pump is provided with under meter, and described air dissolved pump is connected with timer.
8. biochemical synchronization advanced oxidation according to claim 1 disposes waste liquid device, it is characterized in that: be added with in described biological respinse tower through cultivating the microorganism tamed and degrade to pollutent, microorganism carries out oxidative degradation to the organism of spray-absorption.
9. to dispose waste liquid a method based on the biochemical synchronization advanced oxidation of device described in claim 1, it is characterized in that comprising the following steps:
The first step, waste water elder generation is by air dissolved pump from water collecting basin suction biological respinse tower, and aspiration procedure is aeration simultaneously;
Second step, biological respinse tower adopt sequence batch (process, and arrange alternative aeration, quiescing process in every batch processed process, treatment cycle is 0.5-3d, period aeration and rest time than being 1-4:1; Open ultrasonic transducer horn at the end of each aeration, work after 1-20 minute and stop;
After 3rd step, treatment cycle, open biological respinse tower water discharge valve sewage effluent, the volume of discharge accounts for the long-pending 20-60% of biological respinse tower body, after discharge, closes water discharge valve, completes a treatment cycle.
10. biochemical synchronization advanced oxidation according to claim 9 disposes waste liquid method, it is characterized in that: biological respinse tower is equipped with the air dissolved pump of corresponding discharge, fluid level controller, dissolved oxygen on-line computing model and ORP on-line computing model.
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| CN110342741A (en) * | 2019-07-19 | 2019-10-18 | 东莞市环境科学研究所 | A kind of trade effluent advanced treatment system and processing method |
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| CN105330020B (en) | 2017-12-05 |
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