CN103626362A - System for treating urban waste water in recycling manner - Google Patents
System for treating urban waste water in recycling manner Download PDFInfo
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- CN103626362A CN103626362A CN201310652062.6A CN201310652062A CN103626362A CN 103626362 A CN103626362 A CN 103626362A CN 201310652062 A CN201310652062 A CN 201310652062A CN 103626362 A CN103626362 A CN 103626362A
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Abstract
The invention relates to a system for treating urban waste water in a recycling manner. The system comprises a pretreatment unit, a biological reactor and an alga harvesting unit; urban waste water enters the pretreatment unit, then enters the biological reactor and finally enters the alga harvesting unit, after that, the outlet water is discharged. The system is characterized in that the pretreatment unit comprises a grizzly screen, an adjusting neutralization tank, a hydrolytic acidification unit and an anerobic fermentation unit; the number n of gaps of the grizzly screen satisfies the following formula: n=Qmax(sin[alpha])1/2/(dhv), wherein n refers to the number of the gaps of the grizzly screen, Qmax refers to the maximum design flow (m<3>/h), alpha refers to the mounting tilt angle (degree) of the grizzly screen, d refers to grid gaps (mm) of the grizzly screen, h refers to the depth (m) of water in front of the grizzly screen, and v refers to the speed of water flowing through the grizzly screen. The system has the benefits that products with high added values in harvesting of microalgae can be utilized effectively, so that the economic benefits and the social benefits of wastewater treatment can be increased greatly, and a practicable method and system are provided for recycling and comprehensive treatment of waste water.
Description
Technical field
The present invention relates to a kind of system of recycling treatment municipal wastewater.
Background technology
In prior art, municipal sewage treatment is generally divided into three grades: coagulation is that Applied Physics facture is removed undissolved pollutent and parasitic ovum in sewage; Second-stage treatment is that applying biological facture is degraded to simple material by the oxidation operation of various complexity in sewage; Tertiary treatment, is the applied chemistry precipitator method, biochemical process, physico-chemical processes etc., the organism of the phosphorus in removal sewage, nitrogen, difficult degradation, inorganic salt etc.More reasonable as for taking which grade processing, should be depending on the processing requirements to final ejecta.
But it is outmoded that above-mentioned treatment process has seemed, not can solve the sewage pollution problem in city.
Summary of the invention
The technical problem to be solved in the present invention is: the method and system method of gathering in the crops and extract biofuel be to through in certain pretreated municipal wastewater, add specific through domestication after micro-algae, in specific bio-reactor fully after hybrid reaction, in waste water, N, P and organism etc. are removed gradually as the energy of micro-algae, meanwhile, in micro-frond, fat content builds up, when water pollutant is degraded to after certain level, through the micro-algae of microalgae harvesting device, gathered in the crops, and refine into and be converted into biomass energy or other biological product, discharged wastewater met the national standard.
Technical scheme of the present invention is as follows:
A system for recycling treatment municipal wastewater, described system comprises pretreatment unit, bio-reactor, algae results unit, described municipal wastewater enters after pretreatment unit, then enters bio-reactor, finally enter behind algae results unit, water outlet discharge, is characterized in that:
Described pretreatment unit comprises grid, regulates neutralization tank, acidication unit and anaerobically fermenting unit;
N number is counted in described grid gap: n=Qmax (sin α) 1/2/ (dhv);
In formula: n-grid gap number, individual;
Qmax-design maximum flow, m
3 /h;
-grid mounted angle, o;
D-grid grizzly bar gap, mm;
The depth of water before h-grid, m;
V-mistake grid current speed.
Further, described system also further comprises a return flow line, and the water part after processing in described bio-reactor enters algae harvesting apparatus, and another part is back to adjusting neutralization tank by return flow line.
Further, described algae reflux ratio is 1:5-1:3.
Further, described algae harvesting apparatus is air-floating apparatus or coagulative precipitation device.
Further, described reactor comprises pump sump, outlet sump, pipeline and light source, described pipeline is printing opacity pvc pipe, light source is warm radiant, it is characterized in that: the bottom of described pump sump is provided with carbonic acid gas adding set, waste water and micro-algae adding set, pump sump and outlet sump are all provided with online dissolved oxygen, pH, temperature-detecting device, and proofing unit is connected with computer and realizes online detection and control; The front end of described pvc pipe is provided with temperature control equipment.
Further, described pvc pipe is with eccentric pattern, and spiral center is for being provided with light source.
Further, the parallel placement in described pvc pipe road, pipeline below is provided with light source.
Further, described temperature control equipment is hosepipe heat exchanger or electric heater unit.
Further, between described outlet sump and pvc pipe, also there is a return flow line.
Beneficial effect of the present invention is: the present invention can effectively utilize microalgae harvesting high value-added product, shakeout the cost of sewage disposal, optimize effluent quality, greatly increased economic benefit and the social benefit of wastewater treatment, can process waste water for comprehensive resource practicable method and system are provided.
Accompanying drawing explanation
Fig. 1 is the bioreactor construction schematic diagram using in the present invention.
Fig. 2 is wastewater treatment process figure in system of the present invention.
Embodiment
Fig. 2 is wastewater treatment process figure in system of the present invention.
A system for recycling treatment municipal wastewater, described system comprises pretreatment unit, bio-reactor, algae results unit, described municipal wastewater enters after pretreatment unit, then enters bio-reactor, finally enter behind algae results unit, water outlet discharge, is characterized in that:
Described pretreatment unit comprises grid, regulates neutralization tank, acidication unit and anaerobically fermenting unit;
Described grid gap is counted n and is calculated by formula n=Qmax (sin α) 1/2/ (dhv);
In formula: n-grid gap number, individual;
Qmax-design maximum flow, m
3 /h;
-grid mounted angle, o;
D-grid grizzly bar gap, mm;
The depth of water before h-grid, m;
V-mistake grid current speed.
Described system also further comprises a return flow line, and the water part after processing in described bio-reactor enters algae harvesting apparatus, and another part is back to adjusting neutralization tank by return flow line.Regulating neutralization tank, is mainly to set for the water yield of waste water and the unstable situation of water quality, due to pending waste water often passing in time change, sanitary sewage changes with daily life system rule, the water quantity and quality of trade effluent changes with production process.The variation of water quantity and quality can not move treatment facility under optimum process condition, when serious, equipment cannot normally be moved, and needs to establish equalizing tank for this reason, carries out the adjusting of water quantity and quality.In addition, equalizing tank also has preliminary precipitation, and preaeration is lowered the temperature and stores the function of interim accident draining.Described algae reflux ratio is 1:5-1:3.
Further, described algae harvesting apparatus is air-floating apparatus or coagulative precipitation device.
Fig. 1 is the bioreactor construction schematic diagram using in the present invention.A kind of bioreactor of cultivating for oil-producing microalgae in the present invention, described reactor comprises pump sump, outlet sump, pipeline and light source, described pipeline is printing opacity pvc pipe, light source is warm radiant, it is characterized in that: the bottom of described pump sump is provided with carbonic acid gas adding set, waste water and micro-algae adding set, pump sump and outlet sump are all provided with online dissolved oxygen, pH, temperature-detecting device, and proofing unit is connected with computer and realizes online detection and control; The front end of described pvc pipe is provided with temperature control equipment.Pvc pipe can be with eccentric pattern, and spiral center is for being provided with light source.Also can be parallel placement, pipeline below be provided with light source.Described temperature control equipment is hosepipe heat exchanger or electric heater unit.Between outlet sump and pvc pipe, also there is a return flow line.
Municipal wastewater treatment process of the present invention is as follows:
Pre-treatment to municipal wastewater comprises: grid, precipitation, acidication, anaerobically fermenting etc.;
Grid, its effect is to remove larger suspended substance, drift, fibrous matter and solid particulate matter in waste water, to guarantee the normal operation of subsequent disposal unit and water pump, alleviates the processing load of subsequent disposal unit, prevents from blocking spoil disposal pipeline.Grid gap number (n) is pressed formula n=Qmax (sin α) 1/2/ (dhv) and is calculated.
In formula: n-grid gap number, individual;
Qmax-design maximum flow, m
3 /h;
-grid mounted angle, o;
D-grid grizzly bar gap, mm;
The depth of water before h-grid, m;
V-mistake grid current speed.
Acidication, object is for high concentrated organic wastewater, hydrolysis reaction bath is controlled at hydrolysis and two stages of acidifying reaction process.At hydrolysis stage, can make solid organic matter be degraded to dissolved matter, macromolecular substance is degraded to small-molecule substance.Producing acid phase, the organic matter degradations such as carbohydrate are organic acid.In water some macromole can not the biochemical organic pollutant decomposing progressively under anaerobic hydrolysis generate small molecules can the biochemical organic pollutant decomposing, and removed in follow-up aerobe treating processes, it can improve the biodegradability of waste water, improves the processing efficiency of subsequent disposal facility.According to water quality situation, increase suitable nutritive salt, supplement the nitrogen of waste water and the content of phosphorus.
The waste water of processing through aforesaid method enters growth to be had in the bio-reactor of specific micro-algae.Specific micro-algae wherein, in its body, grease enrichment degree is high, good to the removal effect of N, P in sewage.
Claims (9)
1. a system for recycling treatment municipal wastewater, described system comprises pretreatment unit, bio-reactor, algae results unit, described municipal wastewater enters after pretreatment unit, then enters bio-reactor, finally enter behind algae results unit, water outlet discharge, is characterized in that:
Described pretreatment unit comprises grid, regulates neutralization tank, acidication unit and anaerobically fermenting unit;
N number is counted in described grid gap: n=Qmax (sin α) 1/2/ (dhv);
In formula: n-grid gap number, individual;
Qmax-design maximum flow, m
3 /h;
-grid mounted angle, o;
D-grid grizzly bar gap, mm;
The depth of water before h-grid, m;
V-mistake grid current speed.
2. system according to claim 1, is characterized in that: described system also further comprises a return flow line, and the water part after processing in described bio-reactor enters algae harvesting apparatus, and another part is back to adjusting neutralization tank by return flow line.
3. system according to claim 2, is characterized in that: described algae reflux ratio is 1:5-1:3.
4. system according to claim 1, is characterized in that: described algae harvesting apparatus is air-floating apparatus or coagulative precipitation device.
5. system according to claim 1, it is characterized in that: described bio-reactor comprises pump sump, outlet sump, pipeline and light source, described pipeline is printing opacity pvc pipe, light source is warm radiant, it is characterized in that: the bottom of described pump sump is provided with carbonic acid gas adding set, waste water and micro-algae adding set, pump sump and outlet sump are all provided with online dissolved oxygen, pH, temperature-detecting device, and proofing unit is connected with computer and realizes online detection and control; The front end of described pvc pipe is provided with temperature control equipment.
6. system according to claim 5, is characterized in that: described pvc pipe is with eccentric pattern, and spiral center is for being provided with light source.
7. system according to claim 5, is characterized in that: the parallel placement in described pvc pipe road, pipeline below is provided with light source.
8. system according to claim 5, is characterized in that: described temperature control equipment is hosepipe heat exchanger or electric heater unit.
9. system according to claim 5, is characterized in that: between described outlet sump and pvc pipe, also have a return flow line.
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| CN201310652062.6A CN103626362B (en) | 2013-12-05 | 2013-12-05 | A kind of system of recycling treatment municipal wastewater |
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| CN201310652062.6A CN103626362B (en) | 2013-12-05 | 2013-12-05 | A kind of system of recycling treatment municipal wastewater |
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| CN103626362B CN103626362B (en) | 2016-01-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981081A (en) * | 2014-05-13 | 2014-08-13 | 重庆大学 | A microalgae photobioreactor used for deep treatment of waste water |
| CN105110580A (en) * | 2015-09-29 | 2015-12-02 | 武汉理工大学 | Sewage treatment process and sewage treatment system for sewage treatment process |
| CN105255722A (en) * | 2015-10-22 | 2016-01-20 | 天津大成前瞻生物科技研发有限公司 | System and method of culturing microalgae with liquid animal manure |
| CN108249574A (en) * | 2017-12-13 | 2018-07-06 | 华南理工大学 | It is a kind of to handle pig farm breeding wastewater using microalgae and produce the device and its technique of algae powder |
| CN113354096A (en) * | 2021-07-07 | 2021-09-07 | 太原理工大学 | Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof |
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| CN1475562A (en) * | 2003-07-24 | 2004-02-18 | 孙建明 | Microalgae breeding equipment |
| WO2007109066A1 (en) * | 2006-03-15 | 2007-09-27 | Petroalgae, Llc | Systems and methods for large-scale production and harvesting of oil-rich algae |
| CN101525576A (en) * | 2009-04-14 | 2009-09-09 | 中华绿油有限公司 | Method for producing microalgae with domestic sewage and industrial sewage |
| CN103074231A (en) * | 2013-01-31 | 2013-05-01 | 广东中科天元新能源科技有限公司 | Method for producing microalgae by utilizing industrial waste water and waste gas of biobutanol, and application of method |
| CN203668177U (en) * | 2013-12-05 | 2014-06-25 | 南通大学 | System for recycling municipal wastewater |
-
2013
- 2013-12-05 CN CN201310652062.6A patent/CN103626362B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1475562A (en) * | 2003-07-24 | 2004-02-18 | 孙建明 | Microalgae breeding equipment |
| WO2007109066A1 (en) * | 2006-03-15 | 2007-09-27 | Petroalgae, Llc | Systems and methods for large-scale production and harvesting of oil-rich algae |
| CN101525576A (en) * | 2009-04-14 | 2009-09-09 | 中华绿油有限公司 | Method for producing microalgae with domestic sewage and industrial sewage |
| CN103074231A (en) * | 2013-01-31 | 2013-05-01 | 广东中科天元新能源科技有限公司 | Method for producing microalgae by utilizing industrial waste water and waste gas of biobutanol, and application of method |
| CN203668177U (en) * | 2013-12-05 | 2014-06-25 | 南通大学 | System for recycling municipal wastewater |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103981081A (en) * | 2014-05-13 | 2014-08-13 | 重庆大学 | A microalgae photobioreactor used for deep treatment of waste water |
| CN105110580A (en) * | 2015-09-29 | 2015-12-02 | 武汉理工大学 | Sewage treatment process and sewage treatment system for sewage treatment process |
| CN105255722A (en) * | 2015-10-22 | 2016-01-20 | 天津大成前瞻生物科技研发有限公司 | System and method of culturing microalgae with liquid animal manure |
| CN108249574A (en) * | 2017-12-13 | 2018-07-06 | 华南理工大学 | It is a kind of to handle pig farm breeding wastewater using microalgae and produce the device and its technique of algae powder |
| CN113354096A (en) * | 2021-07-07 | 2021-09-07 | 太原理工大学 | Solar power supply-microalgae aeration-coupled reflux oxygen supply micro-aerobic sludge bed combination device and application thereof |
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| CN103626362B (en) | 2016-01-13 |
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