CN105819568A - Aerobic granular sludge sewage processing method having nitrogen removal effect and special-purpose equipment thereof - Google Patents
Aerobic granular sludge sewage processing method having nitrogen removal effect and special-purpose equipment thereof Download PDFInfo
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Abstract
The invention relates to an aerobic granular sludge sewage processing method having nitrogen removal effect and special-purpose equipment thereof. The method comprises the steps of culture and domestication of activated sludge, treatment of target sewage, and treatment of the sludge. The special-purpose equipment comprises a tower body, wherein the tower body is divided into three-phase separation zones of a tower bottom reaction zone, a central aerobic nitrification zone, and a top. The method has the beneficial effects that the sewage processing effect is good, the land occupation area of the tower is small, the granular sludge forming effect is good, nitrogen removal effect is good, external power is not required for circulation of a nitrogen solution and circulation of the sludge, and the cost is saved.
Description
Technical field
The invention belongs to a kind of oxygen animalcule method of making good use of and process the equipment of organic contamination sewage, a kind of aerobic particle mud sewage water treatment method with denitrification and special equipment thereof.
Background technology
Along with expanding economy and the progress of society, the water quality of various organic industrial sewages there occurs basic change, becomes more to be difficult to process, and therefore it effectively processes and utilization becomes people's question of common concern.In recent years, Environmental manages specification increasingly, sewage drainage standard improves constantly, require also to gradually step up to energy consumption, material consumption simultaneously, this makes enterprise also pay attention to self with the process of water, in the urgent need to corresponding sewage disposal technology and equipment, for energy-saving and emission-reduction, waste water control and reuse service thereof.
The features such as in numerous sewage treatment process, it is low that aerobic microbiological treatment technology has processing cost, and outlet effect is good are always one of major technique of organic sewage process.And aerobic particle mud (aerobicgranularsludge) treatment technology therein is the wastewater processing technology grown up in recent years.Aerobic particle mud is a kind of aggregate particle coming from microorganism under certain hydraulic shear effect, there is irregular profile, closely knit structure, excellent settling property, anti impulsion load is higher, to the Organic substance in waste water, ammonia nitrogen, total phosphorus, the noxious substance of difficult degradation, in the process of heavy metal etc., there is reactor floor space little, microbial biomass is big and abundant, the features such as high treating effect, such that it is able to be applied to process high concentrated organic wastewater, poisonous and harmful waste water etc., there is prospects for commercial application widely, have become as the focus of domestic water pollution control area research.
But the aerobic particle mud water treatment facilities sold in current research and market are a kind of equipment for processing Organic Pollution sewage, and this product is mainly made up of the device such as reaction tank, aerator.The shortcoming of this product is that floor space is big, and aerobic particle mud incubation time is long, and independent sewage disposal does not have denitrification effect, needs to coordinate sedimentation tank to carry out mud-water separation etc., causes the investment of equipment and operating cost high.
Summary of the invention
It is an object of the invention to overcome shortcoming of the prior art, it is provided that a kind of aerobic particle mud is cultivated quickly, the aerobic particle mud sewage water treatment method of good sewage processing effect；The special equipment of above-mentioned processing method is provided, this occupation area of equipment is little, be used alone have denitrification effect, nitrification liquid circulation with sludge circulation without additionaling power, there is mud-water separation effect thus secondary sedimentation tank can be omitted.
The object of the present invention is achieved like this:
This has the aerobic particle mud sewage water treatment method of denitrification, it is characterised in that: carry out according to below step:
(1) cultivation of activated sludge and domestication
Activated sludge strain is added in reactor, another addition contains Organic substance, nitrogen, the culture fluid of phosphorus nutrient, under 15-35 degrees celsius, start aerated reaction, aeration gas speed maintains between 5-15m/h, cultivate and tame, Solution culture method is used to tame 3-5 days, the pH value of tracking and testing nutritional solution is answered during cultivating domestication, making it maintain between 6.5-8.5, maintain aerobic nitrification district dissolved oxygen at more than 2mg/L, its water inlet COD maintains between 300-500mg/L, after 3-5 days, granule sludge just one-step forming；
(2) target sewage is processed
The normal condition of reactor is: water temperature is 15-35 degree Celsius, aeration gas speed maintains between 5-15m/h, aerobic nitrification district dissolved oxygen maintains more than 2.0mg/L, at the bottom of tower, reaction zone dissolved oxygen is between 0.3-0.5mg/L, sludge concentration is between 1g/L-5g/L, and mud sedimentation rate half an hour is between 5-30%, and microscopy exists campanularian, tired branch worm, the indicative microorganism of nematicide, mud is in granular form, and mud granule size is between 0.2-4mm；
nullTarget sewage is passed in the reactor that running status is good，Flow of inlet water is to set for 3-7 hour according to hydraulic detention time，Under the drive of aerator ascending air，The sewage entered in reaction zone 1 at the bottom of tower is entered by the hole of muddy water circulation tedge 5 lower end with mud，And rise in aerobic nitrification district 2, middle part in tower 9，Then sewage is carried out by three phase separator 10、Mud separates with gas，The result separated is that sewage flows downward in outer tower 8 space at interior tower 9，Then it is sewn between inside and outside tower by muddy water circulation and circulates，Mud precipitates at inside and outside tower void bottom section，Part circulates at interior tower 9 with water in outer tower 8，Gas is gone out by three phase separator 10 top vent bank of tubes，Top, three-phase separation area sets out mill weir，Process water after precipitation is flowed out by tower top effluent weir，Collected by water leg 12 again，Discharge from outlet 11，The sewage of three-way separator upper end passes through nitrification liquid return line flow to reaction zone at the bottom of tower，Carry out anti-nitration reaction，Mud flows to reaction zone at the bottom of tower by mud return line，Realize mud to mix with waste water，And then the microorganism of suitably this kind of waste water in screening mud，Improve the efficiency of sludge degradation dirt organic pollutants；
The sewage chemical oxygen demand entering reactor controls between 200mg/L-12000mg/L, total nitrogen is between 5mg/L-100mg/L, suspended particle attempts 10-1000mg/L, and the ratio of sewage Biochemical oxygen demand on the 5th and COD, more than 0.25, can realize the process of sewage；
(3) sludge treatment
Mud is gone out by mud discharging bank of tubes, and this method mud output is little, and every day discharges surplus sludge volume and is only 300-500g/m3Sewage.
Described culture fluid selects urban life and the food service industry Biochemical oxygen demand ratio with the COD sewage more than 0.3,
Described culture fluid uses self-made solution to carry out, and self-made solution contains following composition, glucose 0.3g/L, potassium nitrate 0.06g/L, peptone 0.1g/L, ammonium acetate 0.1g/L, potassium dihydrogen phosphate 0.05g/L.
Special equipment for the aerobic particle mud sewage water treatment method with denitrification described in claim 1, including tower body, tower body is divided into reaction zone at the bottom of tower, aerobic nitrification district, middle part, three-phase separation area, top, the total blade diameter length ratio of tower body is between 1:6 to 1:15, and at the bottom of tower, reaction zone, aerobic nitrification district, middle part, three-phase separation area, top volume ratio are 1:3:1.
Reaction zone at the bottom of described tower and be provided with division board between aerobic nitrification district, middle part, reaction zone at the bottom of tower includes that being connected and through division board with division board stretches to the muddy water circulation tedge of interior tower, muddy water circulation tedge lower end is provided with the hole passed through for sewage, it is provided with aerator in muddy water circulation tedge, aerobic nitrification district, middle part is provided with inner tower and outside tower, Nei Ta lower end is provided with muddy water circulation seam, top is provided with, in three-phase separation area, the three phase separator of falling funnel shaped, top, three-phase separation area, top is provided with effluent weir, tower top is provided around effluent trough, effluent trough is provided with outlet, Nei Ta upper end reaches in three-way separator, on interior tower, head tower wall is provided with space, reaction zone at the bottom of tower connects sewage water inlet pipe, lower end, aerobic nitrification district, middle part is provided with mud discharging pipe.
It is provided with nitrification liquid return duct at the bottom of three-phase separation area, described top and tower between reaction zone, bottom aerobic nitrification district, middle part and at the bottom of tower, between reaction zone, is provided with mud return line.
The present invention compared with prior art provides the benefit that:
1. aerobic particle mud is because its construction features and excellent settleability, microbial biomass are big and rich evil so that good sewage processing effect.Aerobic nitrification district Nei Ta makes mud circulate with water with outer tower structure, can quickly form aerobic particle mud by hydraulic shear effect.This method mud output, is little, and every day discharges surplus sludge volume and is only 300-500g/m3Sewage, processes high-concentration waste water and can also not interfere with treatment effect with 1 month not blowdown mud.
2. tower structure reactor has the advantage that floor space is little compared with common response pond, and tower top three-phase separation area arranges and can save follow-up secondary precipitation pool unit simultaneously so that technique floor space is significantly reduced, Economization on land capital construction cost.
3. reaction zone at the bottom of tower has microorganism selection and Denitrification concurrently, can improve reactor organic matter removal effect, improves nitric efficiency.
4. aerobic nitrification district Nei Ta and the circulation of outer tower can increase the mass transfer efficiency of sewage, increase oxygen dissolution effect, improve biosolubilization coefficient of oxygen utilization, improve wastewater treatment efficiency.
5. gas-powered effluent cycle flowing, the pressure differential simultaneously produced by gas rising, drives nitrification liquid circulation and sludge circulation, it is achieved nitrification liquid circulation and sludge circulation are without extra power consumption, save nitrification liquid reflux pump and sludge circulation pump, investment reduction cost and operating cost.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of special equipment of the present invention.
Fig. 2 is Figure 1A-A profile.
Reaction zone at the bottom of 1. towers in figure；2. aerobic nitrification district in the middle part of；3. three-phase separation area, top；4. denitrification zone；5. muddy water circulation tedge；6. aerator；7. muddy water circulation seam；Outer tower；9. tower in；10. three phase separator；11. outlets；12. water legs；13. nitrification liquid return ducts；14. mud return lines；15. water inlet pipes；16. air pumps；17. mud discharging pipes.
Detailed description of the invention
It is further described for the present invention below in conjunction with the accompanying drawings
The method of the invention includes
(1) cultivation of activated sludge and domestication
Activated sludge strain (taking from wastewater treatment plant using activated sludge process excess sludge) is added in reactor, add the culture fluid containing nutrients such as Organic substance, nitrogen, phosphorus, under 15-35 degrees celsius, start aerated reaction, aeration gas speed maintains between 5-15m/h, aerobic zone dissolved oxygen maintains more than 2.0mg/L, cultivates and tames.Culture fluid can select the good biodegradability (BOD such as city domestic sewage, food service industry waste water5/ COD is more than 0.3) sewage carry out, it is possible to using self-made solution to carry out, self-made solution can use following configuration mode: glucose 0.3g/L, potassium nitrate 0.06g/L, peptone 0.1g/L, ammonium acetate 0.1g/L, potassium dihydrogen phosphate 0.05g/L.Solution culture method is used to tame 3-5 days, answer the pH value of tracking and testing nutritional solution during cultivating domestication so that it is maintain between 6.5-8.5, maintain aerobic zone dissolved oxygen at more than 2mg/L, its water inlet COD (COD) maintains between 300-500mg/L, it is not necessary to spoil disposal operates.After 3-5 days, granule sludge just one-step forming.
(2) target sewage is processed.
The normal condition of reactor is: water temperature is 15-35 degree Celsius, aeration gas speed maintains between 5-15m/h, aerobic zone dissolved oxygen maintains more than 2.0mg/L, denitrification zone dissolved oxygen is between 0.3-0.5mg/L, sludge concentration is between 1g/L-5g/L, and mud sedimentation rate half an hour is between 5-30%, and microscopy exists the indicative microorganism such as campanularian, tired branch worm, nematicide, mud is in granular form, and mud granule size is between 0.2-4mm.
nullTarget sewage is entered in the reactor that running status is good，Flow of inlet water is to set for 3-7 hour according to hydraulic detention time，Under the drive of aerator ascending air，The sewage entered in reaction zone 1 at the bottom of tower is entered by the hole of muddy water circulation tedge 5 lower end with mud，And rise in aerobic nitrification district 2, middle part in tower 9，Then sewage is carried out by three phase separator 10、Mud separates with gas，The result separated is that sewage flows downward in outer tower 8 space at interior tower 9，Then circulated between inside and outside tower by muddy water circulation seam 7，Mud precipitates at inside and outside tower void bottom section，Part circulates at interior tower 9 with water in outer tower 8，Gas is gone out by three phase separator 10 top vent bank of tubes，Top, three-phase separation area sets out mill weir，Process water after precipitation is flowed out by tower top effluent weir，Collected by water leg 12 again，Discharge from outlet 11，The sewage of three-way separator upper end passes through nitrification liquid return line flow to reaction zone at the bottom of tower，Carry out anti-nitration reaction，Mud flows to reaction zone at the bottom of tower by mud return line，Realize mud to mix with waste water，And then the microorganism of suitably this kind of waste water in screening mud，Improve the efficiency of sludge degradation dirt organic pollutants；Flow of inlet water according to hydraulic detention time be 3-7 hour set, enter reactor sewage chemical oxygen demand (COD) need control between 200mg/L-10000mg/L, total nitrogen between 5mg/L-100mg/L, sewage Biochemical oxygen demand (BOD on the 5th5) with the ratio of COD (COD) more than 0.25, as above-mentioned condition does not meets, then need to carry out suitable pretreatment.Course of reaction controls reaction condition ibid, the process of sewage can be realized.
(3) sludge treatment
Described mud goes out from mud discharging bank of tubes, and this method mud output is little, and every day discharges surplus sludge volume and is only 300-500g/m3Sewage, processes high-concentration waste water and can also not interfere with treatment effect with 1 month not blowdown mud.
This method uses the type design of novel pond, sludge circulation and nitrification liquid circulation can realize unpowered carrying out, it is only necessary to aeration is as driving.The form that simultaneously can also use circulating pump improves sludge circulation efficiency and nitrification liquid cycle efficieny.
Special equipment of the present invention is made up of reaction zone at the bottom of tower 1, aerobic nitrification district, middle part 2, three-phase separation area, top 3, and total blade diameter length ratio is between 1:6 to 1:15, and at the bottom of tower, reaction zone 1, aerobic nitrification district, middle part 2, three-phase separation area, top 3 volume ratio maintain 1:3:1.nullIt is provided with division board between reaction zone and aerobic nitrification district，Reaction zone at the bottom of tower includes that being connected and through division board with division board stretches to the muddy water circulation tedge of interior tower，Muddy water circulation tedge lower end is provided with the hole passed through for sewage，It is provided with, in muddy water circulation tedge, the aerator being connected with air pump，It is denitrification zone between outer tower and muddy water circulation tedge，Aerobic nitrification district, middle part is provided with inner tower and outside tower，Nei Ta lower end is provided with muddy water circulation seam 7，The three phase separator of falling funnel shaped it is provided with in three-phase separation area，Top, three-phase separation area is provided with effluent weir，Tower top is provided around effluent trough，Effluent trough is provided with outlet，Nei Ta upper end extends in three-way separator，On interior tower, head tower wall is provided with space，Reaction zone connects sewage water inlet pipe，Nitrification liquid return duct it is provided with between reaction zone at the bottom of three-phase separation area, top and tower，It is provided with mud return line between aerobic nitrification district, middle part and reaction zone，Lower end, aerobic nitrification district, middle part is provided with mud discharging pipe.
Treatment sewage enters reaction zone at the bottom of tower by water inlet pipe 15, contacts with the mud of mud return line 14 backflow, makes mud be screened and preculture.The nitrification liquid of nitrification liquid return duct 13 backflow contacts with former water and mud, carries out anti-nitration reaction under anaerobic condition.Aerator 6 continues aeration, makes to rise gas speed in the interior tower 9 in aerobic nitrification district 2, middle part and maintains between 5-15m/h, then in the middle part of it, aerobic nitrification district dissolved oxygen is able to maintain that at more than 2.0mg/L.Under the drive of ascending air, the sewage in reaction zone 1 at the bottom of tower and mud rise in aerobic nitrification district 2, middle part in tower 9 by muddy water circulation tedge 5, then by three phase separator 10 carries out sewage, mud separates with gas.The result separated is that sewage flows downward in outer tower 8 void at interior tower 9, mud precipitates bottom space between inside and outside tower, part returns interior tower 9 and outer tower 8 intermediate gaps with water, and then it is back to aerobic nitrification district, middle part, gas is determined portion's exhaustor by three phase separator 10 and is discharged, and top, three-phase separation area sets out mill weir, and the process water after precipitation is flowed out by tower top effluent weir, collected by water leg 12 again, discharge from outlet 11.
At three phase separator 10 top, sludge blanket area above connects nitrification liquid return duct 13, is back near water inlet pipe 15, provides nitrate nitrogen nitrogen source for denitrification, improves denitrification effect.Mud return line 14 is connect, near sludge reflux to water inlet pipe 15, it is achieved mud contacts the microorganism of suitably this kind of waste water in mixing, and then screening mud with water inlet, improves the efficiency of sludge degradation dirt organic pollutants bottom aerobic nitrification district, middle part 2.Nitrification liquid backflow and sludge reflux can pass through the pressure differential at the bottom of reaction zone 1 at the bottom of tower and aerobic nitrification district, middle part 2 and tower between three-phase separation area, top, reaction zone 13, it is achieved from main flow, it is not necessary to separately add power drive.Maintain between 5-15m/h when rising gas speed in the interior tower 9 in aerobic nitrification district, middle part 2, then the ratio of its nitrification liquid capacity of returns and former water inflow can maintain between 1:1-1:3, and sludge reflux amount can maintain between 1:1-1:2.
The suitable condition of this reactor is: rises gas speed in the interior tower 9 in aerobic nitrification district, middle part 2 and maintains between 5-15m/h, aerobic nitrification district, middle part dissolved oxygen is able to maintain that at more than 2.0mg/L, sewage hydraulic detention time is between 3-7 hour, enter reactor sewage chemical oxygen demand (COD) between 200mg/L-12000mg/L, pH value is between 5.0-9.0, temperature is between 10 DEG C-40 DEG C, suspended particulate matter concentration (SS) is between 10mg/L-1000mg/L, total nitrogen between 5mg/L-100mg/L, sewage Biochemical oxygen demand (BOD on the 5th5) with the ratio of COD (COD) more than 0.25, if this ratio is less than 0.25, then needs to carry out suitable pretreatment, enter back into this reactor and could obtain preferable treatment effect.
Under optimum conditions, aerobic particle mud is only 2-3 days from being inoculated into the granulating formation time.
This method uses the type design of novel pond, aerobic particle mud is back to denitrification zone so that it is contact with raw sewage, under anoxia (dissolved oxygen concentration is 0.3-0.5mg/L) state, it is achieved the Denitrification of nitrate nitrogen in sewage, thus removes the nitrogen in water.Meanwhile, aerobic particle mud contacts with raw sewage, also functions to the domestication to microorganisms such as antibacterials therein and regulation effect, filters out the dominant bacteria of this sewage applicable, improves treatment effect.
This method uses double-tower type structure, improves mass transport effect, improves the shear action between activated sludge, between mud and water, between mud and wall, and the velvet-like activated sludge that can make commonly to wad a quilt with cotton granulates rapidly, forms aerobic particle mud.
Embodiment
Embodiment 1. processes corn starch factory waste water (taking from regulating reservoir water outlet)
Reaction target solution volume: 2.8L
Reaction target solution: certain corn starch factory waste water (taking from regulating reservoir water outlet), water quality is:
COD (COD): 10000-12000mg/L
Nitrate nitrogen: 25-40mg/L
Nitrite nitrogen: 0.04-0.06mg/L
PH:4.5-5.5
Reaction condition is:
Blade diameter length ratio: 1:15
Reactor is high: 1.2m
The interior tower 9 in aerobic nitrification district 2, middle part rises gas speed and maintains 10m/h
Sewage hydraulic detention time 6 hours
Treatment effect is as shown in table 1, and in reactor, the index parameter such as sewage and mud is as shown in table 2.
Table 1 embodiment 1 processes certain corn starch factory sewage (taking regulating reservoir water outlet) effect
The index parameter such as sewage and mud in reactor when table 2 embodiment 1 processes so-and-so corn starch factory sewage (taking regulating reservoir water outlet)
From embodiment 1 it can be seen that this reactor for treatment high concentration starch organic wastewater has preferable treatment effect, COD clearance is up to more than 90%, and denitrification effect reaches more than 80%.
Embodiment .2 Treating Municipal Sewage (takes from certain municipal wastewater treatment plant fine fack water outlet)
Reaction target solution volume is: 2.8L
Reaction target solution: certain municipal sewage (takes from certain municipal wastewater treatment plant fine fack water outlet), and water quality is:
COD (COD): 250-350mg/L
Total nitrogen: 25-40mg/L
PH:6.5-8.5
Reaction condition is:
Blade diameter length ratio: 1:15
Reactor is high: 1.2m
The interior tower 9 in aerobic nitrification district 2, middle part rises gas speed and maintains 5m/h
Sewage hydraulic detention time 3 hours
Treatment effect is as shown in table 3, and in reactor, the index parameter such as sewage and mud is as shown in table 4.
Table 3 embodiment 2 Treating Municipal Sewage factory fine fack outlet effect
The index parameter such as sewage and mud in reactor during table 2 embodiment 1 Treating Municipal Sewage factory's fine fack water outlet
Can be seen that from embodiment 2, this reactor for treatment city domestic sewage has preferable treatment effect, there is preferable denitrification effect, sewage hydraulic detention time is 3 hours, and its water outlet i.e. can reach 1 grade of emission standard A that " urban wastewater treatment firm pollutant emission standard " (GB-18918-2002) requires.
Embodiment .3 processes corn starch factory waste water (taking from anaerobic reation pool water outlet)
Reaction target solution volume is: 2.8L
Reaction target solution: certain corn starch factory waste water (taking from anaerobic reation pool water outlet), water quality is:
COD (COD): 752mg/L
Total nitrogen: 35mg/L
PH:7.6
Reaction condition is:
Blade diameter length ratio: 1:15
Reactor is high: 1.2m
The interior tower 9 in aerobic nitrification district 2, middle part rises gas speed and maintains 8m/h
Sewage hydraulic detention time 5 hours
Aerobic nitrification district, middle part dissolved oxygen is able to maintain that at more than 2.0mg/L
Temperature is at 18 DEG C
Suspended particulate matter concentration (SS) 120mg/L
Its water outlet COD is 54mg/L, and clearance reaches 92.8%
Its water outlet total nitrogen is 10mg/L, and clearance reaches 71.4%
Embodiment .4 Treating Municipal Sewage (takes from certain municipal wastewater treatment plant intake pool)
Reaction target solution volume is: 2.8L
Reaction target solution: certain municipal sewage (takes from certain municipal wastewater treatment plant intake pool), and water quality is:
COD (COD): 554mg/L
Total nitrogen: 84mg/L
PH:7.9
Reaction condition is:
Blade diameter length ratio: 1:15
Reactor is high: 1.2m
The interior tower 9 in aerobic nitrification district 2, middle part rises gas speed and maintains 6m/h
Sewage hydraulic detention time 4 hours
Aerobic nitrification district, middle part dissolved oxygen is able to maintain that at more than 2.0mg/L
Temperature is at 19 DEG C
Suspended particulate matter concentration (SS) 86mg/L
Its water outlet COD is 48mg/L, and clearance reaches 91.3%
Its water outlet total nitrogen is 14mg/L, and clearance reaches 83.3%
Its water outlet i.e. can reach 1 grade of emission standard A that " urban wastewater treatment firm pollutant emission standard " (GB-18918-2002) requires.
Claims (7)
1. an aerobic particle mud sewage water treatment method with denitrification, it is characterised in that: carry out according to below step:
(1) cultivation of activated sludge and domestication
Activated sludge strain is added in reactor, another addition contains Organic substance, nitrogen, the culture fluid of phosphorus nutrient, under 15-35 degrees celsius, start aerated reaction, aeration gas speed maintains between 5-15m/h, cultivate and tame, Solution culture method is used to tame 3-5 days, the pH value of tracking and testing nutritional solution is answered during cultivating domestication, making it maintain between 6.5-8.5, maintain aerobic nitrification district dissolved oxygen at more than 2mg/L, its water inlet COD maintains between 300-500mg/L, after 3-5 days, granule sludge just one-step forming；
(2) target sewage is processed
The normal condition of reactor is: water temperature is 15-35 degree Celsius, aeration gas speed maintains between 5-15m/h, aerobic nitrification district dissolved oxygen maintains more than 2.0mg/L, at the bottom of tower, reaction zone dissolved oxygen is between 0.3-0.5mg/L, sludge concentration is between 1g/L-5g/L, and mud sedimentation rate half an hour is between 5-30%, and microscopy exists campanularian, tired branch worm, the indicative microorganism of nematicide, mud is in granular form, and mud granule size is between 0.2-4mm；
nullTarget sewage is passed in the reactor that running status is good，Flow of inlet water is to set for 3-7 hour according to hydraulic detention time，Under the drive of aerator ascending air，The sewage entered in reaction zone at the bottom of tower is entered by the hole of muddy water circulation tedge lower end with mud，And rise in aerobic nitrification district, middle part in tower，Then sewage is carried out by three phase separator、Mud separates with gas，The result separated is that sewage flows downward in Nei Ta with Wai Ta space，Then it is sewn between inside and outside tower by muddy water circulation and circulates，Mud precipitates at inside and outside tower void bottom section，Part circulates at Nei Ta with water in outer tower，Gas is gone out by three phase separator top vent bank of tubes，Top, three-phase separation area sets out mill weir，Process water after precipitation is flowed out by tower top effluent weir，Collected by water leg again，Discharge from outlet，The sewage of three-way separator upper end passes through nitrification liquid return line flow to reaction zone at the bottom of tower，Carry out anti-nitration reaction，Mud flows to reaction zone at the bottom of tower by mud return line，Realize mud to mix with waste water，And then the microorganism of suitably this kind of waste water in screening mud，Improve the efficiency of sludge degradation dirt organic pollutants；
The sewage chemical oxygen demand entering reactor controls between 200mg/L-12000mg/L, total nitrogen is between 5mg/L-100mg/L, suspended particle attempts 10-1000mg/L, and the ratio of sewage Biochemical oxygen demand on the 5th and COD, more than 0.25, can realize the process of sewage；
(3) sludge treatment
Mud is gone out by mud discharging bank of tubes, and this method mud output is little, and every day discharges surplus sludge volume and is only 300-500g/m3Sewage.
The aerobic particle mud sewage water treatment method with denitrification the most according to claim 1, it is characterised in that: described culture fluid selects urban life and the food service industry Biochemical oxygen demand ratio with the COD sewage more than 0.3.
The aerobic particle mud sewage water treatment method with denitrification the most according to claim 1, it is characterized in that: described culture fluid uses self-made solution to carry out, self-made solution contains following composition, glucose 0.3g/L, potassium nitrate 0.06g/L, peptone 0.1g/L, ammonium acetate 0.1g/L, potassium dihydrogen phosphate 0.05g/L.
The aerobic particle mud sewage water treatment method with denitrification the most according to claim 1, it is characterised in that:
(1) cultivation of activated sludge and domestication
Activated sludge strain is added in reactor, another addition contains Organic substance, nitrogen, the culture fluid of phosphorus nutrient, under 19 degrees celsius, start aerated reaction, aeration gas speed maintains between 5-15m/h, cultivate and tame, Solution culture method is used to tame 3-5 days, the pH value of tracking and testing nutritional solution is answered during cultivating domestication, making it maintain between 7.9, maintain aerobic nitrification district dissolved oxygen at more than 2mg/L, its water inlet COD maintains between 300-500mg/L, after 3-5 days, granule sludge just one-step forming；
(2) target sewage is processed
The normal condition of reactor is: water temperature is 15-35 degree Celsius, aeration gas speed maintains between 6m/h, aerobic nitrification district dissolved oxygen maintains more than 2.0mg/L, at the bottom of tower, reaction zone dissolved oxygen is between 0.3-0.5mg/L, sludge concentration is between 1g/L-5g/L, and mud sedimentation rate half an hour is between 5-30%, and microscopy exists campanularian, tired branch worm, the indicative microorganism of nematicide, mud is in granular form, and mud granule size is between 0.2-4mm；
nullTarget sewage is passed in the reactor that running status is good，Flow of inlet water is a hour setting according to hydraulic detention time，Under the drive of aerator ascending air，The sewage entered in reaction zone at the bottom of tower is entered by the hole of muddy water circulation tedge lower end with mud，And rise in aerobic nitrification district, middle part in tower，Then sewage is carried out by three phase separator、Mud separates with gas，The result separated is that sewage flows downward in Nei Ta with Wai Ta space，Then it is sewn between inside and outside tower by muddy water circulation and circulates，Mud precipitates at inside and outside tower void bottom section，Part circulates at Nei Ta with water in outer tower，Gas is gone out by three phase separator top vent bank of tubes，Top, three-phase separation area sets out mill weir，Process water after precipitation is flowed out by tower top effluent weir，Collected by water leg again，Discharge from outlet，The sewage of three-way separator upper end passes through nitrification liquid return line flow to reaction zone at the bottom of tower，Carry out anti-nitration reaction，Mud flows to reaction zone at the bottom of tower by mud return line，Realize mud to mix with waste water，And then the microorganism of suitably this kind of waste water in screening mud，Improve the efficiency of sludge degradation dirt organic pollutants；
The sewage chemical oxygen demand entering reactor controls between 554mg/L, and total nitrogen is between 84mg/L, and suspended particle attempts 10-1000mg/L, and the ratio of sewage Biochemical oxygen demand on the 5th and COD, more than 0.25, can realize the process of sewage；
(3) sludge treatment
Mud is gone out by mud discharging bank of tubes, and this method mud output is little, and every day discharges surplus sludge volume and is only 300-500g/m3Sewage.
5. the special equipment for the aerobic particle mud sewage water treatment method with denitrification described in claim 1, it is characterized in that: include tower body, tower body is divided into reaction zone at the bottom of tower, aerobic nitrification district, middle part, three-phase separation area, top, the total blade diameter length ratio of tower body is between 1:6 to 1:15, and at the bottom of tower, reaction zone, aerobic nitrification district, middle part, three-phase separation area, top volume ratio are 1:3:1.
nullAerobic particle mud sewage disposal special equipment the most according to claim 5，It is characterized in that: reaction zone at the bottom of described tower and be provided with division board between aerobic nitrification district, middle part，Reaction zone at the bottom of tower includes that being connected and through division board with division board stretches to the muddy water circulation tedge of interior tower，Muddy water circulation tedge lower end is provided with the hole passed through for sewage，It is provided with aerator in muddy water circulation tedge，Aerobic nitrification district, middle part is provided with inner tower and outside tower，Nei Ta lower end is provided with muddy water circulation seam，Top is provided with, in three-phase separation area, the three phase separator of falling funnel shaped，Top, three-phase separation area, top is provided with effluent weir，Tower top is provided around effluent trough，Effluent trough is provided with outlet，Nei Ta upper end reaches in three-way separator，On interior tower, head tower wall is provided with space，Reaction zone at the bottom of tower connects sewage water inlet pipe，Lower end, aerobic nitrification district, middle part is provided with mud discharging pipe.
Aerobic particle mud sewage disposal special equipment the most according to claim 6, it is characterized in that: at the bottom of three-phase separation area, described top and tower, between reaction zone, be provided with nitrification liquid return duct, bottom aerobic nitrification district, middle part and at the bottom of tower, between reaction zone, be provided with mud return line.
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| CN108046416A (en) * | 2017-11-15 | 2018-05-18 | 南阳理工学院 | For the method cultivated the device and system of aerobic particle mud and cultivate aerobic particle mud |
| CN109133337A (en) * | 2018-10-24 | 2019-01-04 | 华北水利水电大学 | A kind of continuous-flow aerobic granular sludge culture and culture and the acclimation method for preparing reaction unit and aerobic particle mud |
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