CN102515425A - High efficiency town sewage treatment system and process with low yield of sludge - Google Patents
High efficiency town sewage treatment system and process with low yield of sludge Download PDFInfo
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- CN102515425A CN102515425A CN2011104020570A CN201110402057A CN102515425A CN 102515425 A CN102515425 A CN 102515425A CN 2011104020570 A CN2011104020570 A CN 2011104020570A CN 201110402057 A CN201110402057 A CN 201110402057A CN 102515425 A CN102515425 A CN 102515425A
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Abstract
The invention discloses a high efficiency town sewage treatment system and process with low yield of sludge. According to the invention, a water pump, a valve, a flowmeter, an anaerobic zone, an anoxic zone and an aerobic zone are successively connected; a diving mixer is provided in the anaerobic zone and the anoxic zone, an aeration device is provided at the bottom of the aerobic zone and is connected with an air blower, a metazoa culture adding groove is connected with the aerobic zone, the bottom of the aerobic zone is connected with the bottom of the anoxic zone through a mixed liquor reflux pump and a mixed liquor reflux pipe, the upper part of the aerobic zone is connected with the bottom of a secondary settling tank, a sludge scraper is provided in the secondary settling tank, the upper part of the secondary settling tank is provided with an outlet pipe, and the bottom of the secondary settling tank is connected with the bottom of the anaerobic zone and the anoxic zone through a settling zone sludge reflux pump and a sludge pipe. The high efficiency town sewage treatment process with low yield of sludge in the invention is applicable to all the activated sludge processes and variant processes thereof and to biological treatment processes with a biological carrier and can be used for newly building a town sewage treating construction and reconstructing a built construction in a town sewage treatment plant, wherein, cost for reconstruction is very low.
Description
Technical field
The present invention relates to biotechnology and field of environment engineering technology, relate in particular to a kind of town sewage treatment system and technology thereof of efficient low sludge yield.
Background technology
Along with the raising of wastewater treatment in China rate, the mud generation is multiplied, and the sludge treatment problem becomes increasingly conspicuous.The activated sludge process dirty water living creature processing technique is widely used in China's municipal effluent and Industrial Wastewater Treatment with efficient outstanding advantage.Yet along with improving constantly of wastewater treatment rate, effective disposal of a large amount of excess sludges of its generation become also that we have to face is stubborn problem very.According to the statistical communique of issue State Statistics Bureau in March, 2011,2010 the year end municipal sewage plant's daily handling ability reach 10262 ten thousand steres, increase by 13.4% than the end of last year; Treatment rate of domestic sewage reaches 76.9%, improves 1.6 percentage points.374.56 hundred million tons of annual co-processing waste water.Mud is pressed water ratio 80% and is calculated, and the dewatered sludge of generation is greater than 3,000 ten thousand t/a.Compare so huge sludge yield, the mud of China's town sewage plant 80% does not obtain stabilizing treatment at present.Therefore, how rationally to handle and to dispose the mud of Sewage Plant, the outlet that solves municipal sludge has become very urgent task.
Town sewage is handled method commonly used has physics, chemistry and biochemical process, and normally the combination of several method just can reach requirement.Which kind of method is handled town sewage all will produce secondary pollutant--mud, and therefore pursuing minimizing of mud also is the problem that engineering design need be considered.Original position reduces the excess sludge productive rate in sewage treatment process, and the various mud decrement technology that reduce excess sludge production from the source have become the focus and the developing direction of biological sewage treatment research.The mud decrement technology of metazoan predation mikrobe has caused the extensive concern of Chinese scholars because of having advantages such as economical and efficient, non-secondary pollution.It is according to ecological principle that the metazoan original position is cleared up the mud technology; Through the generation of metazoal predation in the fortified foodstuff chain with the minimizing excess sludge; Guaranteeing under the effluent quality prerequisite up to standard, making the processing of mud and disposal transfer to " source control " from " end treatment " to a certain extent.Metazoan is a food with organic detritus and dead organism.Along with organic minimizing in the water, wheel animalcule, oligochaetes, nematode have appearred, and wheel animalcule can engulf the mud that is scattered,
Utilize miniature metazoan to carry out mud decrement, not only can reach higher mud decrement effect, and have less energy consumption, working cost low, do not have by product and environment do not produced advantages such as secondary pollution.
Summary of the invention
The objective of the invention is to overcome the big deficiency of mud generation in the existing town sewage treating processes, a kind of town sewage treatment system and technology thereof of efficient low sludge yield is provided.
The town sewage treatment system of efficient low sludge yield comprises that intake pump, valve, under meter, diving mixer, gas blower, anaerobic zone, oxygen-starved area, aerobic zone, second pond, aerating apparatus, settling region sludge reflux pump, metazoan cultivation add groove, mud scraper, mixed-liquor return pump, mixed-liquor return pipe, sludge pipe and rising pipe; Water pump, valve, under meter, anaerobic zone, oxygen-starved area, aerobic zone link to each other in order; Be provided with diving mixer in anaerobic zone and the oxygen-starved area, the aerobic zone bottom is provided with aerating apparatus, and aerating apparatus links to each other with gas blower; The metazoan cultivation adds groove and links to each other with aerobic zone; The aerobic zone bottom links to each other with the bottom, oxygen-starved area through mixed-liquor return pump, mixed-liquor return pipe, and aerobic zone top links to each other with the second pond bottom, is provided with mud scraper in the second pond; Second pond top is provided with rising pipe, and sludge reflux pump, sludge pipe link to each other with anaerobic zone bottom, bottom, oxygen-starved area through the settling region in the second pond bottom.
The town sewage treatment process of efficient low sludge yield is: town sewage gets into anaerobic zone through intake pump, valve and under meter; Be provided with the abundant contact that stirrer guarantees muddy water in the anaerobic zone; Get into the oxygen-starved area through the anaerobic zone town sewage, be provided with the abundant contact that stirrer guarantees muddy water in the oxygen-starved area, town sewage gets into aerobic zone through the oxygen-starved area; Aerating system in the aerobic zone links to each other with gas blower through pipeline and guarantees to continue efficient oxygen supply; Make aerobic zone DO more than 2mg/l, the metazoan cultivation adds groove and regularly adds highly active miniature metazoan to aerobic zone, and the bottom muddy water mixed solution of aerobic zone is back to the bottom, oxygen-starved area through mixed-liquor return pump, mixed-liquor return pipe and carries out denitrification denitrogenation; Return current ratio of the mixed liquid is controlled at 1～4 times of flooding quantity volume; The top water outlet of aerobic zone gets into the bottom of second pond, is effluxed by the rising pipe water outlet through behind the mud scraper, and the mud of second pond bottom mainly is back to the oxygen-starved area through the settling region sludge reflux pump simultaneously; Be back to anaerobic zone on a small quantity, excess sludge decontamination mud treatment system is handled.
The beneficial effect that the present invention compared with prior art has:
(1) sludge disposal is transferred to " source control " from " end treatment ".In sewage treatment process mud original position decrement has saved that the required mud of mud subsequent disposal concentrates, the expense of dosing dehydration, links such as outward transport landfill, drying or burning.
(2) economical, efficient, practical, the non-secondary pollution problem: finally in biochemical system, reach the mud original position decrement more than 70%, the investment of ton water is subdued more than 25%, and the sludge treatment cost can be saved more than 25%.Significantly reduce occupation of land.
(3) flexibility is strong, applied range
Present technique is applicable to the minimizing to excess sludge of all activated sludge process biological sewage treatment and deformation technology thereof; Can under the situation that does not influence the normal operation of Sewage Plant, implement the sludge reduction transformation; Reduced investment, low, the instant effect of working cost, application value is high.
Description of drawings
Fig. 1 is the town sewage treatment system structural representation that efficiently hangs down sludge yield;
Among the figure, intake pump 1, valve 2, under meter 3, diving mixer 4, gas blower 5, anaerobic zone 6, oxygen-starved area 7, aerobic zone 8, second pond 9, aerating apparatus 10, settling region sludge reflux pump 11, metazoan are cultivated and add groove 12, mud scraper 13, mixed-liquor return pump 14, mixed-liquor return pipe 15, sludge pipe 16, rising pipe 17.
Embodiment
As shown in Figure 1, efficiently the town sewage treatment system of low sludge yield comprises that intake pump 1, valve 2, under meter 3, diving mixer 4, gas blower 5, anaerobic zone 6, oxygen-starved area 7, aerobic zone 8, second pond 9, aerating apparatus 10, settling region sludge reflux pump 11, metazoan cultivation add groove 12, mud scraper 13, mixed-liquor return pump 14, mixed-liquor return pipe 15, sludge pipe 16 and rising pipe 17; Water pump 1, valve 2, under meter 3, anaerobic zone 6, oxygen-starved area 7, aerobic zone 8 link to each other in order; Be provided with diving mixer 4 in anaerobic zone 6 and the oxygen-starved area 7, aerobic zone 8 bottoms are provided with aerating apparatus 10, and aerating apparatus 10 links to each other with gas blower 5; The metazoan cultivation adds groove 12 and links to each other with aerobic zone 8; Aerobic zone 8 bottoms link to each other with 7 bottoms, oxygen-starved area through mixed-liquor return pump 14, mixed-liquor return pipe 15, and aerobic zone 8 tops link to each other with second pond 9 bottoms
Be provided with mud scraper 13 in the second pond 9, second pond 9 tops are provided with rising pipe 17, and sludge reflux pump 11, sludge pipe 16 link to each other with anaerobic zone 6 bottoms, 7 bottoms, oxygen-starved area through the settling region in second pond 9 bottoms.
The town sewage treatment process of efficient low sludge yield is: town sewage gets into anaerobic zone 6 through intake pump 1, valve 2 and under meter 3; Be provided with the abundant contact that stirrer 4 guarantees muddy water in the anaerobic zone 6; Get into oxygen-starved area 7 through anaerobic zone 6 town sewages, be provided with the abundant contact that stirrer 4 guarantees muddy water in the oxygen-starved area 7, town sewage gets into aerobic zone 8 through oxygen-starved area 7; Aerating system 10 in the aerobic zone 8 links to each other with gas blower 5 through pipeline and guarantees to continue efficient oxygen supply; Make aerobic zone DO more than 2mg/l, the metazoan cultivation adds groove 12 and regularly adds highly active miniature metazoan to aerobic zone 8, and the bottom muddy water mixed solution of aerobic zone 8 is back to 7 bottoms, oxygen-starved area through mixed-liquor return pump 14, mixed-liquor return pipe 15 and carries out denitrification denitrogenation; Return current ratio of the mixed liquid is controlled at 1～4 times of flooding quantity volume; The top water outlet of aerobic zone 8 gets into the bottom of second pond 9, is effluxed by rising pipe 17 water outlets through mud scraper 13 backs, and the mud of second pond 9 bottoms mainly is back to oxygen-starved area 7 through settling region sludge reflux pump 11 simultaneously; Be back to anaerobic zone 6 on a small quantity, excess sludge decontamination mud treatment system is handled.
Embodiment 1
Certain town sewage water quality is pH6～7, CODcr100～200mg/l, NH<sub >3</sub>-N:15～30mg/l, TP2～4mg/l, water temperature is a normal temperature, the water yield is 1000m<sup >3</sup>/ d, the sewage technology of everywhere managing is grid-A<sup >2</sup>/ O-second pond-sterilization-water outlet requires to handle the back water outlet and reaches CODcr<the GB18918-2002 standard of 60mg/>l.The anaerobic hydrolysis district residence time is 1.5h, establishes the diving mixer stirring in the district and makes the muddy water thorough mixing.The anoxic pond residence time is 3h, and the Aerobic Pond residence time is 12h.Adopt activated sludge process, blast aeration can promote the aeration tube oxygenation, and aerobic zone adds metazoan and strengthens predation, and with this understanding, < 60mgl, the mud decrement effect reaches more than 70% water outlet CODcr, steady running half a year.
Claims (2)
1. the town sewage treatment system of an efficient low sludge yield is characterized in that comprising that intake pump (1), valve (2), under meter (3), diving mixer (4), gas blower (5), anaerobic zone (6), oxygen-starved area (7), aerobic zone (8), second pond (9), aerating apparatus (10), settling region sludge reflux pump (11), metazoan cultivation add groove (12), mud scraper (13), mixed-liquor return pump (14), mixed-liquor return pipe (15), sludge pipe (16) and rising pipe (17); Water pump (1), valve (2), under meter (3), anaerobic zone (6), oxygen-starved area (7), aerobic zone (8) link to each other in order; Be provided with diving mixer (4) in anaerobic zone (6) and oxygen-starved area (7); Aerobic zone (8) bottom is provided with aerating apparatus (10); Aerating apparatus (10) links to each other with gas blower (5); The metazoan cultivation adds groove (12) and links to each other with aerobic zone (8); Aerobic zone (8) bottom links to each other with oxygen-starved area (7) bottom through mixed-liquor return pump (14), mixed-liquor return pipe (15), and aerobic zone (8) top links to each other with second pond (9) bottom, is provided with mud scraper (13) in the second pond (9); Second pond (9) top is provided with rising pipe (17), and sludge reflux pump (11), sludge pipe (16) link to each other with anaerobic zone (6) bottom, oxygen-starved area (7) bottom through the settling region in second pond (9) bottom.
2. one kind is used the town sewage treatment process of the efficient low sludge yield of system according to claim 1; It is characterized in that town sewage passes through intake pump (1), valve (2) and under meter (3) and gets into anaerobic zone (6); Be provided with the abundant contact that stirrer (4) guarantees muddy water in the anaerobic zone (6); Get into oxygen-starved area (7) through anaerobic zone (6) town sewage; Be provided with the abundant contact that stirrer (4) guarantees muddy water in the oxygen-starved area (7); Town sewage gets into aerobic zone (8) through oxygen-starved area (7), and the aerating system (10) in the aerobic zone (8) links to each other with gas blower (5) through pipeline and guarantees to continue efficient oxygen supply, makes aerobic zone DO more than 2mg/l; The metazoan cultivation adds groove (12) and regularly adds highly active miniature metazoan to aerobic zone (8); The bottom muddy water mixed solution of aerobic zone (8) is back to bottom, oxygen-starved area (7) through mixed-liquor return pump (14), mixed-liquor return pipe (15) and carries out denitrification denitrogenation, and return current ratio of the mixed liquid is controlled at 1～4 times of flooding quantity volume, and the top water outlet of aerobic zone (8) gets into the bottom of second pond (9); Efflux by rising pipe (17) water outlet through mud scraper (13) back; The mud of second pond (9) bottom mainly is back to oxygen-starved area (7) through settling region sludge reflux pump (11) simultaneously, is back to anaerobic zone (6) on a small quantity, and excess sludge decontamination mud treatment system is handled.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109179861A (en) * | 2018-08-28 | 2019-01-11 | 广州市市政工程设计研究总院有限公司 | A kind of pulling flow type coupling sewage-treatment plant and technique |
| CN112499760A (en) * | 2020-09-28 | 2021-03-16 | 四川洇沃环境科技有限公司 | Intelligent integrated sewage treatment device |
| CN114105305A (en) * | 2021-12-28 | 2022-03-01 | 中麒水务科技(深圳)有限公司 | Biochemical treatment system of integrated settling zone |
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| CN109179861A (en) * | 2018-08-28 | 2019-01-11 | 广州市市政工程设计研究总院有限公司 | A kind of pulling flow type coupling sewage-treatment plant and technique |
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| CN112499760A (en) * | 2020-09-28 | 2021-03-16 | 四川洇沃环境科技有限公司 | Intelligent integrated sewage treatment device |
| CN114105305A (en) * | 2021-12-28 | 2022-03-01 | 中麒水务科技(深圳)有限公司 | Biochemical treatment system of integrated settling zone |
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Application publication date: 20120627 |
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