CN101538101A - Home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant - Google Patents
Home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant Download PDFInfo
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- CN101538101A CN101538101A CN200910049821A CN200910049821A CN101538101A CN 101538101 A CN101538101 A CN 101538101A CN 200910049821 A CN200910049821 A CN 200910049821A CN 200910049821 A CN200910049821 A CN 200910049821A CN 101538101 A CN101538101 A CN 101538101A
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- 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
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- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Abstract
The invention belongs to the technical field of environment protection, particularly relates to a home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant. The system comprises structures including a primary adjusting tank, an alkaline fermentation tank, an adjusting tank a carbon source storage and the like tank, and devices including a pipeline, a meter and a dehydration, anhydration control system and the like. Primary sludge, excess sludge and urban utensil garbage from sewage plant are taken as the raw materials for strengthening fermentation to regenerate carbon source in the alkaline fermentation tank under certain temperature and certain pH after being adjusted by the primary adjusting tank, and then chemical agent is added into the adjusting tank, thus not only obtaining high-quality carbon source simply but also obtaining a byproduct which can be used as a fertilizer, and realizing stabilization, reduction, decontamination and utilization of waste sewage. The technique has the advantages of low investment, low running cost, steady quality of regenerated carbon source, high-value byproduct and the like.
Description
Technical field
The invention belongs to environmental technology field, be specifically related to a kind of Sewage Plant home position strengthening fermentation regenerated carbon source Sewage treatment systems.
Background technology
The source of China's water is poor relatively, and the water pollution is serious day by day.China Environmental State Bulletin shows in recent years, shine major cause into China's water pollution and comprises that nitrogen, phosphorus quantity discharged are too high.In order to control nitrogen, phosphorus pollution, (GB18918-2002) one-level A standard code of China's " urban wastewater treatment firm pollutant emission standard ", NH in the town B-grade sewage factory
4 +-N≤5mg/L, TN≤15mg/L, TP≤0.5mg/L.Though sewage work has been built up at present a lot of cities, because organic content is lower in the sewage, actual denitrogenation dephosphorizing effect is unsatisfactory, and water outlet often can not be satisfied emission standard.Though can be by adding carbon source as a supplement such as methyl alcohol, acetate, glucose, Sewage Plant running cost will significantly increase.
Contain a large amount of bacteriums and organism in primary sludge that Sewage Plant produces and the excess sludge, if deal with improperly with the harm environment.Sludge treatment generally turns to purpose with innoxious, stabilization, minimizing and resource.In order to achieve the above object, it is one of technology of using always that anaerobic sludge digestion produces methane, but methane content is often not high in the methane gas of output, flammable bad.Another kind of technology is that sour technology is produced in anaerobic sludge digestion, but owing to acid production rate under the normal condition is not high, and contain the nitrogen phosphorus of high density, so the less use in actual sewage factory of this technology.In addition, though report that in recent years alkaline condition can improve anaerobism and produce sour efficient, still there is not sophisticated technology to use up to now for Sewage Plant.
Summary of the invention
The object of the present invention is to provide a kind of Sewage Plant home position strengthening fermentation regenerated carbon source Sewage treatment systems.
The Sewage Plant home position strengthening fermentation regenerated carbon source Sewage treatment systems that the present invention proposes, connect to form by preliminary sedimentation tank 1, sewage biological treatment system 2, second pond 3, preconditioning pond 4, alkaline fermentation pond 5, conditioner 6, carbon source storage pool 7 and pipeline and valve, wherein:
Be provided with first stirrer 8, thermometer 9, first mud level meter 10 and first pH meter 11 in the alkaline fermentation pond 5, the bottom is provided with well heater 30;
Be provided with second stirrer 12, second pH meter 13, second mud level meter 14, nitrogen phosphorus automatic analyser 15 and phosphorus automatic analyser 16 in the conditioner 6, conditioner 6 tops are connected acid-alkali accommodation pond 17 by pipeline with second valve 23, be connected ammonia nitrogen solution pool 18 by pipeline with the 3rd valve 24, be connected phosphorus solution pond 19 by pipeline with the 4th valve 25, be connected magnesium ion solution pond 20 by pipeline with the 5th valve 26, be connected flocculant solution pond 21 with the 6th valve 27 by pipeline;
Computer generalization Controlling System 35 connects first stirrer 8, thermometer 9, the first mud level meters 10, first pH meter 11, second stirrer 12, second pH meter 13, second mud level meter 14, nitrogen phosphorus automatic analyser 15, phosphorus automatic analyser 16, first valve 22, second valve 23, the 3rd valve 24, the 4th valve 25, the 5th valve 26, the 6th valve 27, the 7th valve 28, first sludge pump 29, well heater 30, second sludge pump 31 and the 3rd sludge pump 32 respectively.
The Sewage Plant home position strengthening fermentation regenerated carbon source sewage treatment process that the present invention proposes, concrete steps are as follows:
(1) with in Sewage Plant primary sludge, excess sludge, the city changing food waste one or more as fermentation raw material, fermentation raw material enters preconditioning pond 4;
(2) fermentation raw material in preconditioning pond 4 enters alkaline fermentation pond 5 through first sludge pump 29, pH value in the control alkaline fermentation pond 5 is 8～14, alkaline fermentation pond 5 temperature are 15～60 ℃, and hydraulic detention time is 1～30 day, carry out forced fermentation and produce carbon source under first stirrer 8 stirs;
(3) mixture after the fermentation enters conditioner 6 through second sludge pump 31, add ammonia nitrogen, phosphorus or magnesium ion in the conditioner 6 respectively, and after mixing by second stirrer 12, stop to stir, mixture in the conditioner 6 leaves standstill, layering, open the 7th valve 28 then, the supernatant liquor in the conditioner 6 is drained in the carbon source storage pool 7;
(4) throw out of conditioner 6 lower floors enters device for dehydrating sladge waste 33 dehydrations through the 3rd sludge pump 32, and dehydration filtrate enters carbon source storage pool 7, and dehydrated sludge cake enters drying bed 34 mummification;
(5) liquid return in the carbon source storage pool 7 is to sewage biological treatment system 2, as the supplementary carbon source of biological sewage treatment.
The invention has the beneficial effects as follows:
(1) developed completely, helped solving the problem that Sewage Plant carbon source deficiency, poor denitrification and dephosphorization effect, effluent quality are difficult to satisfy national standard in temperature and alkaline pH is united down, the Sewage Plant home position strengthening fermentation regenerated carbon source is used for sewage disposal new system;
(2) can effectively reduce the processing costs of Sewage Plant primary sludge and excess sludge, simultaneously city changing food waste and Sewage Plant waste sludge resource utilization are utilized again;
(3) when handling waste, producing carbon source raising Sewage Plant denitrogenation dephosphorizing effect, obtained the higher byproduct of a kind of fertilizer efficiency, this byproduct can be made agricultural fertilizer, has certain economic benefits;
(4) use the present invention, can significantly reduce the running cost of Sewage Plant, improve effluent quality, improve, optimize existing urban sewage treatment system; Native system also has the certain guidance meaning to the operation of factory and community wastewater treatment station.
The present invention is a raw material with primary sludge, excess sludge, the city changing food waste of Sewage Plant, through entering alkaline fermentation pond strengthening fermentation regenerated carbon source under certain temperature and alkaline pH combined action after the conditioning of preconditioning pond, in conditioner, add some chemical agents subsequently, thereby not only obtained the fine carbon source easily, also obtain a kind of byproduct that can be used as fertilizer, and reached the purpose of waste sludge stabilization, minimizing, innoxious, resource utilization.
Description of drawings
Fig. 1 is that Sewage Plant home position strengthening fermentation regenerated carbon source of the present invention is used for the Sewage treatment systems structural diagrams.
Fig. 2 is the automatic control system structural diagrams that Sewage Plant home position strengthening fermentation regenerated carbon source of the present invention is used for sewage treatment process.
Number in the figure: 1 is preliminary sedimentation tank, and 2 is sewage biological treatment system, and 3 is second pond, 4 are the preconditioning pond, and 5 is the alkaline fermentation pond, and 6 is conditioner, 7 is the carbon source storage pool, and 8 is first stirrer, and 9 is thermometer, 10 is first mud level meter, and 11 is first pH meter, and 12 is second stirrer, 13 is second pH meter, and 14 is second mud level meter, and 15 is nitrogen phosphorus automatic analyser, 16 is the phosphorus automatic analyser, and 17 is the acid-alkali accommodation pond, and 18 is the ammonia nitrogen solution pool, 19 is the phosphorus solution pond, and 20 is the magnesium ion solution pond, and 21 is the flocculant solution pond, 22 is first valve, and 23 is second valve, and 24 is the 3rd valve, 25 is the 4th valve, and 26 is the 5th valve, and 27 is the 6th valve, 28 is the 7th valve, and 29 is first sludge pump, and 30 is well heater, 31 is second sludge pump, and 32 is the 3rd sludge pump, and 33 is dehydration equipment, 34 is drying bed, and 35 is computer control system.
Embodiment
Be described in further detail in conjunction with the accompanying drawings below by embodiment:
Embodiment 1:
Certain municipal sewage plant (20,000 tons/day of processing poweies) implementing process transformation, the purpose of transformation are that the carbon source of utilizing the changing food waste of the primary sludge of Sewage Plant, excess sludge and near catering trade to strengthen generation improves the Sewage Plant dephosphorization and denitrification effect.In this improvement project, the unit type of employing is as follows: valve 22-27 adopts DN25 type electrically operated valve; Valve 28 adopts DN200 type electrically operated valve; Sludge pump 29,31,32 adopts flow 100m
3The sludge pump of/h, power 55kw; Stirrer 8,12 adopts QJZB-7.5 type diving mixer; PH meter 11,13 adopts Jenco 3675 industrial phs; Thermometer 9 adopts the 377-2 thermometer; Mud level meter 10,14 adopts DPS300 sludge interface analyser; Well heater 30 adopts the removable heat exchanger of KCS-1; Ammonia nitrogen automatic analyser 15 adopts NH4D sc nh 3-n analyser; Phosphorus automatic analyser 16 adopts NPW-150 total phosphorus on line analyzer.
As shown in Figure 1, the mixture of primary sludge, excess sludge, three kinds of materials of changing food waste, the mixture of any two kinds of materials in perhaps above-mentioned three kinds of materials, any one one matter in perhaps above-mentioned three kinds of materials enters the fermentation raw material of preconditioning pond 4 as fermentation and acid;
After preconditioning pond 4 was regulated, fermentation raw material entered alkaline fermentation pond 5, and the hydraulic detention time of raw material in this pond is 1～30 day;
Alkaline pH in the alkaline fermentation pond 5 is controlled between 8～14, and the scope of measuring when first pH meter 10 is not in this scope the time, and the medicament in the solution pool 17 is added into through first valve 22 and is used for regulating the pH value in the alkaline fermentation pond 5, until the pH that adjusts to setting;
Temperature range in the alkaline fermentation pond 5 is 15～60 ℃, and the scope of measuring when thermometer 9 is not in this scope the time, and well heater 30 is opened attemperation, stops heating after adjusting to the temperature of setting;
Liquid level is by 10 controls of first mud level meter, when liquid level is higher than setting height H in the alkaline fermentation pond 5
1The time, first sludge pump 29 quits work; When liquid level is lower than setting height H
2The time, second sludge pump 31 quits work; The opening time of first sludge pump 29 and second sludge pump 31 was determined by the residence time of fermentation raw material in alkaline fermentation pond 5;
Fermenting mixture is behind second sludge pump, 31 input conditioners 6, and ammonia nitrogen automatic analyser 15 and phosphorus automatic analyser 16 feed back to the computer intelligence integrated control system with ammonia nitrogen and phosphorus concentration, calculate the amount of the required ammonia nitrogen that adds, phosphorus or magnesium ion.Ammonia nitrogen, phosphorus or magnesium ion add by opening the 3rd valve 24, the 4th valve 25, the 5th valve 26; The 3rd valve 24, the 4th valve 25, the 5th valve 26 connect corresponding ammonia nitrogen solution pool 18, phosphorus solution pond 19 and magnesium ion solution pond 20 respectively;
Under agitation condition, behind ammonia nitrogen, phosphorus or the magnesium ion, the pH value in the conditioner 6 is measured by second pH meter 13, if not between scope pH 8～10, second valve 23 is opened and regulated the pH value, closes behind the pH that adjusts to setting;
After pH adjusted and finishes, the flocculation agent in the flocculant solution 21 joined in the conditioner 6 through valve 27, after fully stirring, stop second stirrer 12, after leaving standstill for some time, supernatant liquor wherein enters carbon source storage pool 7 by 14 controls of second mud level meter through the 7th valve 28;
The throw out of conditioner 6 lower floors enters device for dehydrating sladge waste 33 dehydrations through the 3rd sludge pump 32, and dehydration filtrate enters carbon source storage pool 7, and dehydrated sludge cake enters drying bed 34 mummification, and the material after the mummification is rich in nutritive elements such as nitrogen, phosphorus, can be used as fertilizer and uses;
Liquid return in the carbon source storage pool 7 is to Sewage treatment systems, as the supplementary carbon source of biological sewage treatment.
System shown in Figure 1 can also can be finished by manual operation by the on-line automatic control of computer intelligence integrated control system (35) shown in Figure 2.Computer generalization Controlling System 35 connects first stirrer 8, thermometer 9, the first mud level meters 10, first pH meter 11, second stirrer 12, second pH meter 13, second mud level meter 14, nitrogen phosphorus automatic analyser 15, phosphorus automatic analyser 16, first valve 22, second valve 23, the 3rd valve 24, the 4th valve 25, the 5th valve 26, the 6th valve 27, the 7th valve 28, first sludge pump 29, well heater 30, second sludge pump 31 and the 3rd sludge pump 32 respectively.
Above-mentioned description to embodiment is can understand and apply the invention for the ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to the foregoing description, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art should be within protection scope of the present invention for improvement and modification that the present invention makes according to announcement of the present invention.
Claims (1)
1, a kind of Sewage Plant home position strengthening fermentation regenerated carbon source Sewage treatment systems, connect to form by preliminary sedimentation tank (1), sewage biological treatment system (2), second pond (3), preconditioning pond (4), alkaline fermentation pond (5), conditioner (6), carbon source storage pool (7) and pipeline and valve, it is characterized in that:
Be provided with first stirrer (9), thermometer (9), first mud level meter (10) and first pH meter (11) in the alkaline fermentation pond (5), the bottom is provided with well heater (30);
Be provided with second stirrer (12), second pH meter (13), second mud level meter (14), nitrogen phosphorus automatic analyser (15) and phosphorus automatic analyser (16) in the conditioner (6), conditioner (6) top is connected acid-alkali accommodation pond (17) by pipeline with second valve (23), be connected ammonia nitrogen solution pool (18) by pipeline with the 3rd valve (24), be connected phosphorus solution pond (19) by pipeline with the 4th valve (25), be connected magnesium ion solution pond (20) by pipeline with the 5th valve (26), be connected flocculant solution pond (21) with the 6th valve (27) by pipeline;
Preliminary sedimentation tank (1) one side is provided with sewage inlet, opposite side connects sewage biological treatment system (2), preliminary sedimentation tank (1) bottom is by pipe connection preconditioning pond (4), sewage biological treatment system (2) connects second pond (3), preconditioning pond (4) is connected alkaline fermentation pond (5) by pipeline with first sludge pump (29), alkaline fermentation pond (5) is connected conditioner (6) one sides by pipeline with second sludge pump (31), conditioner (6) bottom is connected dehydration equipment (33) by pipeline with second sludge pump (32), conditioner (6) opposite side is by the 7th valve (28) and pipe connection carbon source storage pool (7), and dehydration equipment (33) connects drying bed (34); Carbon source storage pool (7) is by the connecting tube of pipe connection preliminary sedimentation tank (1) with sewage biological treatment system (2);
Computer generalization Controlling System (35) connects first stirrer (8), thermometer (9) respectively, first mud level meter (10), first pH meter (11), second stirrer (12), second pH meter (13), second mud level meter (14), nitrogen phosphorus automatic analyser (15), phosphorus automatic analyser (16), first valve (22), second valve (23), the 3rd valve (24), the 4th valve (25), the 5th valve (26), the 6th valve (27), the 7th valve (28), first sludge pump (29), well heater (30), second sludge pump (31) and the 3rd sludge pump (32).
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| CN2009100498213A CN101538101B (en) | 2009-04-23 | 2009-04-23 | Home position strengthening fermentation regenerated carbon source sewage disposal system for sewage plant |
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| WO2011054298A1 (en) * | 2009-11-04 | 2011-05-12 | 大亚有限公司 | Method and apparatus for integratedly treating domestic wastewater and organic garbage |
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