CN202415336U - Device for reinforcing biological denitrification during sludge reduction with tubificidae - Google Patents

Device for reinforcing biological denitrification during sludge reduction with tubificidae Download PDF

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Publication number
CN202415336U
CN202415336U CN2011205076615U CN201120507661U CN202415336U CN 202415336 U CN202415336 U CN 202415336U CN 2011205076615 U CN2011205076615 U CN 2011205076615U CN 201120507661 U CN201120507661 U CN 201120507661U CN 202415336 U CN202415336 U CN 202415336U
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CN
China
Prior art keywords
tubificidae
sludge
sewage
limnodrilus hoffmeisteri
pond
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Expired - Fee Related
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CN2011205076615U
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Chinese (zh)
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孙培德
施群燕
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Zhejiang Gongshang University
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Zhejiang Gongshang University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/20Sludge processing

Abstract

The utility model discloses a device for reinforcing biological denitrification during sludge reduction with tubificidae. The device comprises a tank body, biological carriers, a stirring paddle and fine bubble aerators, wherein the tank body is provided with a water inlet and a water outlet; a sludge discharge hole is arranged at the bottom of the tank body; a digestion district is arranged in the tank body; the stirring paddle is arranged in the middle of the digestion district; the fine bubble aerators are arranged at the bottom of the digestion district; and the biological carriers are uniformly distributed around the stirring paddle. The device has the following beneficial effects that biological fillers are hung and carried in the existing sewage treatment device to cultivate the tubificidae, after the sewage enters a reaction device, such pollutants as organic matters, nitrogen and phosphorus in the sewage are degraded by microorganisms, and meanwhile, the tubificidae ingest the sludge generated by growth and metabolism of the microorganisms to reduce the sludge; and the device is an ecological sewage treatment device which has simple process and low energy consumption, is environment-friendly and does not cause secondary pollution.

Description

A kind of Limnodrilus hoffmeisteri mud decrement enhanced biological NRU
Technical field
The utility model relates to water-treatment technology field, relates in particular to a kind of Limnodrilus hoffmeisteri mud decrement enhanced biological NRU.
Background technology
90% sewage work has adopted active sludge processing system in the world at present, has produced a large amount of excess sludges thus, and it is handled with disposal costs and accounts for 20%~40% of sewage work's overall running cost, even up to 60%.In addition, along with the raising of wastewater treatment rate, as the also increase thereupon of mud generation of Sewage Plant accessory products.How that output is huge, increase rapidly that mud carries out properly treatment and disposal safely, make its minimizing, innoxious, resource utilization, received the great attention of relevant government department and environment circle scholar both at home and abroad.
Not only traditional sludge treatment process such as landfill, burning etc. can't reduce sludge yield from the source; Also can increase the extra process load of solid waste; Increase running cost, cause secondary pollution, the energy-saving and emission-reduction that propose with country and the requirement of ecological, environmental protective run in the opposite direction.In recent years; Having the scholar to find to utilize the Limnodrilus hoffmeisteri sludge predation, can reduce sludge yield from the source, is a kind of less energy-consumption, low emission; No coupling product and environment do not caused " ecological, environmental protective technology " of secondary pollution, the development topic of the new road of Chinese environmental protection is explored by the country that links closely.Scholar's both domestic and external research shows that Limnodrilus hoffmeisteri mud food ration is very considerable, and is bigger to the potentiality of mud decrement.
Yet the Limnodrilus hoffmeisteri predation also can have influence on the stability of sewage biological treatment system.Relevant scholar once observed water quality deteriorations such as water outlet nitrogen, phosphorus appear in sewage biological treatment system because of the Limnodrilus hoffmeisteri sludge predation phenomenon in the research of carrying out the Limnodrilus hoffmeisteri mud decrement.Nitrogen, phosphorus are the principal elements that causes body eutrophication, and China is very severe because of contained nitrogen in the waste water of discharging, body eutrophication problem that phosphorus causes.Announce that according to State Environmental Protection Administration's " environmental aspect communique in 2006 " national surface water overall water quality belongs to intermediate pollution.Main contamination index is permanganate index, ammonia nitrogen and petroleum-type etc.Large-scale freshwater lake all has eutrophic state in various degree, and main contamination index is nitrogen, phosphorus compound.
Therefore; Technological layer and energy-saving and cost-reducing economic aspect from the degraded synchronously of saprobic system muddy water; All press for the novel reaction device that exploitation municipal effluent biological denitrificaion and mud are removed synchronously; The task of top priority that this has become wastewater treatment in China and sludge disposal field has great society, environment and economic benefit.
The utility model content
The purpose of the utility model is in order to solve the big and water outlet ammonia nitrogen of sludge of sewage treatment plant output, total nitrogen problem not up to standard; Based on the technological layer and energy-saving and cost-reducing economic aspect of Sewage treatment systems muddy water degraded synchronously, the new device of a kind of Limnodrilus hoffmeisteri mud decrement enhanced biological denitrogenation is proposed.
A kind of Limnodrilus hoffmeisteri mud decrement enhanced biological denitrogenation reactor comprises pond body, bio-carrier, stirring rake and micro-hole aerator, and described pond body is provided with water-in and water outlet, and body bottom in said pond is provided with mud discharging mouth; In the body of described pond is digestion zone, and described stirring rake is located at the digestion zone middle part, and described micro-hole aerator is located at the digestion zone bottom.Described bio-carrier is uniformly distributed in around the stirring rake.
Described bio-carrier is the elastic hollow suspension ball filler that is filled with the needle-like filler; Described elastic hollow suspension ball filler adopts spherical housing, and the spherical housing diameter is 8cm, and sphere becomes vesicular, and the aperture is 5mm.
The inside filling needle-like elastic filler of said hollow suspension ball filler makes bio-carrier have permeability, high-specific surface area, inoculation Limnodrilus hoffmeisteri in the described needle-like elastic filler; The dosage of unit pond body Limnodrilus hoffmeisteri is 2.5g/L; Under the substrate conditions and environment condition of the best, utilize the composite bio-chemical effect of Limnodrilus hoffmeisteri and mikrobe, improve the mud decrement effect of sludge treating system; The sludge disposal mode is transferred to " source control " from " end treatment " of routine; In this simultaneously, the denitrification efficiency of strengthened denitrification mikrobe, thus guarantee Sewage treatment systems water outlet ammonia nitrogen, total nitrogen qualified discharge.
Described Limnodrilus hoffmeisteri is subordinate to the Annelita Oligochaeta, is the many cells metazoans, and is comparatively responsive to ammonia nitrogen concentration; Ammonia nitrogen concentration is when 30~45mg/L; The yield coefficient of Limnodrilus hoffmeisteri is about 0.3, and the mud decrement best results, and the mud decrement rate can reach 30~40%.
The Limnodrilus hoffmeisteri mud decrement enhanced biological denitrogenation reactor of the utility model has good mud decrement and bio-denitrifying sewage effect, and its operation scheme is followed successively by into water, aerobic, anoxic, deposition and draining.After sewage is sent into the digestion zone of pond body by pump through water-in, at aerobic stage, the effect of and nitrococcus nitrated through aerobic autotrophic type; Ammonia nitrogen oxidation in the sewage is nitrite nitrogen or nitrate nitrogen, and system adopts micro-pore aeration, and air gets into digestion zone through air pump and micro-hole aerator; Reaction unit built-in biological carrier is after sewage gets into, owing to wander about as a refugee and the bioadhesion effect; Suspended substance in the sewage etc. enters into spherical porous carrier inside, and suppressed by vector in Limnodrilus hoffmeisteri excretory viscous substance catch, accumulate, have higher microorganism concn; Cultivation of nitrifier and growth when helping; Simultaneously, the Limnodrilus hoffmeisteri mud that the microorganism growth metabolism is produced of ingesting makes sludge reduction; In the anoxic stage; The nitrite that denitrifying bacterium (denitrifier) produces aerobic stage and nitrate salt is converted into nitrogen or oxynitride is overflowed from waste water; Thereby reach the purpose of denitrogenation from waste water, the existence of Limnodrilus hoffmeisteri can improve the bio-denitrifying sewage effect in the reaction unit, in addition; Limnodrilus hoffmeisteri can improve the settling property of active sludge rapidly; Accelerate the effect of mud solid-liquid separation, thereby further improve system's effluent quality state, the TN clearance can by before 25%~30% be increased to 60%~70%.During whole service, the reaction unit optimum temps is 25 ℃~30 ℃, and PH is 6.5~8.5, and MLSS is about 2000mg/L, water inlet NH 4 +-N the best is about 30mg/L, and wherein, the aerobic stage biochemical reaction time extends to 6h by 4h, to improve NH 4 +The clearance of-N, and can eliminate NO 2 -The accumulation phenomenon of-N.
Adopt the utility model apparatus processes sewage, its mud decrement rate can reach 30%~40%, NH 4 +-N clearance can reach 86.7%, and the TN clearance can reach 60%~70%.
The utility model device can be realized the efficient decrement of mud and water outlet ammonia nitrogen in the Sewage treatment systems, total nitrogen qualified discharge, has that initial cost is economized, running cost is low, simple to operate, does not produce the characteristics of secondary pollution.
Description of drawings
Fig. 1 is the structural representation of the utility model device.
Fig. 2 is the synoptic diagram of bio-carrier Ball-type packing in the utility model device.
Each description of reference numerals among the figure
1-water-in, 2-bio-carrier, 3-stirring rake
4-micropore aeration pipe 5-water outlet 6-mud discharging mouth
7-Limnodrilus hoffmeisteri, 8-needle-like elastic filler 9-pond body
Embodiment
Limnodrilus hoffmeisteri mud decrement enhanced biological NRU as shown in Figure 1 comprises pond body 9, bio-carrier 2, stirring rake 3 and micro-hole aerator 4, and described pond body 9 is provided with water-in 1 and water outlet 5, and body 9 bottoms, said pond are provided with mud discharging mouth 6; In the described pond body 9 is digestion zone, and described stirring rake 3 is located at the digestion zone middle part, and described micro-hole aerator 4 is located at the digestion zone bottom.
The inner thing carrier 2 of concatenating of placing of digestion zone more; Bio-carrier 2 is a plurality of hollow suspension ball fillers, and the spherical housing diameter is 8cm, and sphere becomes vesicular; The aperture is 5mm; The elastic filler of inner filling needle-like, carrier have inoculation Limnodrilus hoffmeisteri in permeability, the high-specific surface area biologic packing material, and the dosage of unit pond body Limnodrilus hoffmeisteri is 2.5g/L.
After sewage is sent into the digestion zone of pond body 9 by pump through water-in 1, at aerobic stage, the effect of and nitrococcus nitrated through aerobic autotrophic type; Ammonia nitrogen in the sewage is oxidized to nitrite nitrogen or nitrate nitrogen, and system adopts micro-pore aeration, and air is through air pump and micro-hole aerator 4 entering pond bodies 9; The built-in porous biological carrier 2 of digestion zone is after sewage gets into, owing to wander about as a refugee and the bioadhesion effect; Suspended substance in the sewage etc. enters into spherical porous carrier inside, and suppressed by vector in Limnodrilus hoffmeisteri excretory viscous substance catch, accumulate, have higher microorganism concn; Cultivation of nitrifier and growth when helping; Simultaneously, the Limnodrilus hoffmeisteri mud that the microorganism growth metabolism is produced of ingesting makes sludge reduction; In the anoxic stage, the nitrite that denitrifying bacterium (denitrifier) produces aerobic stage and nitrate salt is converted into nitrogen or oxynitride is overflowed from waste water, thus reach the purpose of denitrogenation from waste water.Sewage is discharged through water port, and excess sludge is discharged through the mud discharging mouth of digestion zone bottom.
Application examples 1
Adopt like Fig. 1 reaction unit, its diameter is 30cm, high 56cm; The following 9cm of water level is apart from 18cm zone carry bio-carrier at the bottom of the pond, inoculation oligochaetes worm; Be mainly Huo Fu water silk earthworm (Limnodrilus hoffmeisteri), positive tubificid (Tubifex tubifex) and Su Shi cercobranchiate earthworm (Branchiura sowerbyi), the reaction unit central zone is provided with the frequency conversion stirring rake, and stir speed (S.S.) is controlled at 120~180r/min; The reaction unit bottom is provided with horizontal micropore aeration pipe, entire reaction district dissolved oxygen is evenly distributed, and drops to minimum to the disturbance of Limnodrilus hoffmeisteri; Shore pipe is laid in the reaction zone bottom, the organic composition because Limnodrilus hoffmeisteri is mainly ingested in the active sludge, and inorganic mud can be accumulated in Sewage treatment systems; The regular separation energy of inorganic mud is improved mud structure and activity, ensures the steady running of sewage biochemical treatment system, and Limnodrilus hoffmeisteri mud decrement enhanced biological denitrogenation reactor is after operation for some time; Along with the continuous accumulation of inorganics, the mud flco is active to descend, at this moment; The heavy speed difference and the current difference of inorganic mud capable of using and active sludge discharge inorganic mud through shore pipe.Limnodrilus hoffmeisteri mud decrement enhanced biological denitrogenation reactor run duration, temperature is controlled at 25 ℃~30 ℃, and PH 6.5~8.5, MLSS 2000~3000mg/L, aerobic stage wherein, DO 2~5mg/L, influent ammonia nitrogen is controlled at 30 ~ 40mg/L; The anoxic stage, DO<0.5mg/L.
After the transformation, the mud decrement rate of reaction unit can reach 30%~40%, and influent ammonia nitrogen is 30mg/L, and the water outlet ammonia nitrogen is about 4mg/L, and clearance is 86.7%; Water inlet TN is 40mg/L, and water outlet TN is 12.5mg/L, and clearance is 68.8%.

Claims (4)

1. Limnodrilus hoffmeisteri mud decrement enhanced biological NRU; Comprise pond body (9), bio-carrier (2), stirring rake (3) and micro-hole aerator (4); Described pond body is provided with water-in (1) and water outlet (5), and said pond body (9) bottom is provided with mud discharging mouth (6), it is characterized in that: be digestion zone in the described pond body (9); Described stirring rake (3) is located at the digestion zone middle part, and described micro-hole aerator (4) is located at the digestion zone bottom.
2. Limnodrilus hoffmeisteri mud decrement enhanced biological NRU according to claim 1 is characterized in that: described bio-carrier (2) is for being filled with the elastic hollow suspension ball filler of needle-like filler.
3. Limnodrilus hoffmeisteri mud decrement enhanced biological NRU according to claim 2 is characterized in that: described elastic hollow suspension ball filler adopts spherical housing, and the spherical housing diameter is 8cm, and sphere becomes vesicular, and the aperture is 5mm.
4. Limnodrilus hoffmeisteri mud decrement enhanced biological NRU according to claim 1, it is characterized in that: described bio-carrier (2) is uniformly distributed in stirring rake (3) on every side.
CN2011205076615U 2011-12-08 2011-12-08 Device for reinforcing biological denitrification during sludge reduction with tubificidae Expired - Fee Related CN202415336U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583924A (en) * 2011-12-08 2012-07-18 浙江工商大学 Tubificidae sludge decrement enhanced biological denitrification device
CN103058368A (en) * 2012-12-06 2013-04-24 浙江工商大学 Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583924A (en) * 2011-12-08 2012-07-18 浙江工商大学 Tubificidae sludge decrement enhanced biological denitrification device
CN103058368A (en) * 2012-12-06 2013-04-24 浙江工商大学 Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method
CN103058368B (en) * 2012-12-06 2014-01-29 浙江工商大学 Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120905

Termination date: 20141208

EXPY Termination of patent right or utility model