CN104591409B - Method for treating pig farm wastewater by using micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater - Google Patents
Method for treating pig farm wastewater by using micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater Download PDFInfo
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- CN104591409B CN104591409B CN201510063905.8A CN201510063905A CN104591409B CN 104591409 B CN104591409 B CN 104591409B CN 201510063905 A CN201510063905 A CN 201510063905A CN 104591409 B CN104591409 B CN 104591409B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
Abstract
The invention relates to a method for treating pig farm wastewater by using a micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater, belongs to the technical field of sewage treatment and particularly relates to the micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater and a method for treating pig farm wastewater. The micro-aerobic biological treatment device is used for solving the problems of complex process, large investment in infrastructure, high energy consumption and high operating cost since the low-C/N-ratio wastewater treatment technology is not perfect in the prior art. The device comprises a micro-aerobic reactor, a sedimentation tank, a muddy water dissolved oxygen tank, a blower, a dissolved oxygen sensor, an air flow control instrument, a sludge return pump, a micro-aerobic reactor water inlet pipe, a micro-aerobic reactor water outlet pipe, a sedimentation tank water outlet pipe, a sludge return pipe, a residual sludge discharge pipe, an aeration pipe and valves. The method comprises the following step of carrying out micro-aerobic treatment on wastewater through the micro-aerobic reactor so that anaerobic respiration, aerobic respiration, nitrification and denitrification coexist in the treatment system to remove pollutants. The micro-aerobic biological treatment device is used for treating pig farm wastewater.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related at a kind of low C/N micro-oxygen biology than dry clear excrement Wastewater from Pig Farm
Reason device and the method processing Pig raising wastewater thereof.
Background technology
Pig raising wastewater mainly includes urine, remaining feces, food-residue and pig house washing water etc..Pig raising wastewater generally has
Intermittent discharge, organic concentration and nitrogen and phosphorus content are high, carbon-nitrogen ratio is low and concentration of suspension high and more intractable.If
The most treated it is directly discharged in environment, natural water and organism in water can be caused serious harm.The concrete water of Pig raising wastewater
Matter index differs greatly because of scale and the difference of clear excrement mode, and the current clear excrement mode of Large-scale pig farm mainly has three kinds: water
Rush excrement, blister excrement and dry clear excrement.After dry clear excrement mode refers to first by mechanically or manually clear excrement, then rinse pig house, so can be big
Amplitude reduces wash water, and this type of Pig raising wastewater is mainly made up of urine and pig house washing water, and therefore organic concentration is relatively low, and
The feces collected has higher manurial value.In sum, dry clear excrement technique is more suitable for Large-scale pig farm.Investigation display,
Pig farm scale is the biggest, and the ratio using dry clear excrement is the highest.Dry clear excrement contained chemistry in Pig raising wastewater produced by pattern of raising pigs needs
Oxygen amount COD is 1000～7600mg/L, five-day BOD BOD5It is 700～4100mg/L, ammonia nitrogen NH4 +-N is with total
Nitrogen TN is respectively 434～610mg/L and 481～730mg/L.Excrement and blister excrement is rushed, produced by dry clear excrement pattern relative to water
The C/N ratio of Pig raising wastewater is lower, about 0.5～about 1.8, is that a kind of typical low C/N compares waste water.Too low C/N is when
The NH of high concentration4 +-N brings the biggest difficulty to the process of this waste water.Therefore, the efficient high NH of exploiting economy4 +-N, low
C/N processes new technique and equipment than Pig raising wastewater, significant.
Mainly rely on physico-chemical process that waste water carries out denitrogenation pretreatment than the processing method of waste water low C/N at present, then lead to
The mode crossing additional carbon regulates biochemical reactor water inlet C/N ratio so that it is be suitable to biological denitrificaion.But, materialization denitrogenation and additional
The water quality adjustment method of carbon source, inevitably increases the complexity of technique, operation stability, and invests and processing cost
Deng, economy is poor.
Summary of the invention
The present invention is to solve that prior art is more perfect than the treatment technology of waste water for low C/N, there is complex process, base
Build investment big, the problem that energy consumption is high, operating cost is high, and provide a kind of low C/N more biological than micro-oxygen of dry clear excrement Wastewater from Pig Farm
Processing means and the method processing Pig raising wastewater thereof.
A kind of low C/N of the present invention is than doing micro-oxygen biological treatment device of clear excrement Wastewater from Pig Farm by micro-oxygen reactor, sedimentation tank, mud
Water-soluble oxygen pond, aerator, dissolved oxygen sensor, air weight controller, sludge reflux pump, micro-oxygen reactor water inlet pipe, the reaction of micro-oxygen
Device outlet pipe, sedimentation tank outlet pipe, mud return line, excess sludge discharge pipe, aeration tube and valve composition；Described micro-oxygen is anti-
The top answering device is provided with micro-oxygen reactor outlet pipe, and the mouth of pipe of described micro-oxygen reactor outlet pipe is arranged on the upper of described sedimentation tank
Side, the top of described sedimentation tank is provided with sedimentation tank outlet pipe, the bottom outlet of described sedimentation tank and mud return line and residue
Mud discharging pipe is connected, and described excess sludge discharge pipe is provided with valve；The bottom in described muddy water dissolved oxygen pond is provided with air inlet
And water inlet, described water inlet is connected with mud return line, and described air inlet is connected with aerator by aeration tube, described air blast
The control signal input of machine is connected with the control signal outfan of air weight controller, the signal input part of air weight controller and dissolved oxygen
The signal output part of sensor is connected, and described dissolved oxygen sensor is arranged on the middle part of micro-oxygen reactor, the end of described micro-oxygen reactor
Portion is provided with water inlet and sludge reflux mouth, and described water inlet is connected with micro-oxygen reactor water inlet pipe, and described sludge reflux mouth passes through
Sludge reflux pump is connected with the top in muddy water dissolved oxygen pond.
Principle: waste water enters reactor, by reactor bottom mud by micro-oxygen reactor water inlet pipe bottom micro-oxygen reactor
During layer, while the suspended material in waste water is retained by the mud of sludge blanket, removed by the metabolism of sludge microbe
COD and NH4 +The polluters such as-N；By the control of the monitoring of online dissolved oxygen with the blow rate required, by dissolved oxygen concentration in reactor
Controlling at about 0.3mg/L, under this micro-oxygen conditions, preponderate with aerobic bacteria and amphimicrobe in mud flco surface, and in anoxia
Mud flco inside account for anaerobe leading.Due to the difference of microenvironment inside and outside activated sludge, make anaerobic respiration and aerobic respiration,
Nitrification and denitrification coexists in processing system, can realize Organic substance, NH4 +The synchronization of the polluter such as-N and TN is removed.
The method utilizing said apparatus to process Pig raising wastewater specifically sequentially includes the following steps:
One, low C/N enters into micro-oxygen by micro-oxygen reactor water inlet pipe from the bottom of micro-oxygen reactor than dry clear excrement Wastewater from Pig Farm
In reactor, low C/N passes through the sludge blanket bottom micro-oxygen reactor, in the monitoring of dissolved oxygen sensor than dry clear excrement Wastewater from Pig Farm
Under, controlling the dissolved oxygen amount in micro-oxygen reactor is 0.3mg/L～1mg/L, and hydraulic detention time is 8h, through giving up that micro-oxygen processes
Water overflows to sedimentation tank from micro-oxygen reactor outlet pipe at micro-oxygen reactor top, then from the sedimentation tank outlet pipe on sedimentation tank top
Overflow is gone out, and obtains qualified water outlet；
Two, the sludgd deposition being mingled with in the waste water that micro-oxygen processes is back to muddy water to the bottom of sedimentation tank by mud return line
In dissolved oxygen pond, after aeration, obtain mud mixture, then by sludge reflux pump, mud mixture is back to micro-oxygen and reacts
In device；Bottom described sedimentation tank, remaining mud is gone out by excess sludge discharge bank of tubes；Reflux ratio is 45:1.
The invention has the beneficial effects as follows:
1, the present invention is used for high NH4 +-N, low C/N than the process of dry clear excrement Wastewater from Pig Farm, can remove in the synchronization of economical and efficient
Organic substance, NH4 +The pollutant such as-N and TN.
2, the present invention uses micro-oxygen conditions, has relatively low power consumption because aeration rate is low.
3, present device processes the dry clear excrement Wastewater from Pig Farm of low C/N ratio, is not required to materialization deamination pretreatment, and biological denitrificaion is the most not
Needing additional carbon, processing cost is low.
4, reactor involved in the present invention has higher reflux ratio, and capacity of resisting impact load is strong, stable effluent quality.
5, to try out scope wide for the present invention, and simple in construction, compact, manufacture, installation, maintenance convenient, take up an area few, reduced investment,
It is suitable for large-scale production.
Accompanying drawing explanation
Fig. 1 is the low C/N structural representation than micro-oxygen biological treatment device of dry clear excrement Wastewater from Pig Farm；Wherein 1 is that micro-oxygen is anti-
Answer device, 2 for sedimentation tank, 3 for muddy water dissolved oxygen pond, 4 for aerator, 5 for dissolved oxygen sensor, 6 for air weight controller, 7 for dirt
Mud reflux pump, 8 be micro-oxygen reactor water inlet pipe, 9 be micro-oxygen reactor outlet pipe, 10 be sedimentation tank outlet pipe, 11 for mud
Return duct, 12 be excess sludge discharge pipe, 13 be aeration tube, 14 for valve.
Detailed description of the invention
Technical solution of the present invention is not limited to act detailed description of the invention set forth below, also includes any group between each detailed description of the invention
Close.
Detailed description of the invention one: combine Fig. 1 and present embodiment is described, a kind of low C/N of present embodiment gives up than dry clear excrement pig farm
Micro-oxygen biological treatment device of water by micro-oxygen reactor 1, sedimentation tank 2, muddy water dissolved oxygen pond 3, aerator 4, dissolved oxygen sensor 5,
Air weight controller 6, sludge reflux pump 7, micro-oxygen reactor water inlet pipe 8, micro-oxygen reactor outlet pipe 9, sedimentation tank outlet pipe 10,
Mud return line 11, excess sludge discharge pipe 12, aeration tube 13 and valve 14 form；The top of described micro-oxygen reactor 1 sets
Being equipped with micro-oxygen reactor outlet pipe 9, the mouth of pipe of described micro-oxygen reactor outlet pipe 9 is arranged on the top of described sedimentation tank 2, institute
State the top of sedimentation tank 2 and be provided with sedimentation tank outlet pipe 10, the bottom outlet of described sedimentation tank 2 and mud return line 11 and
Excess sludge discharge pipe 12 is connected, and described excess sludge discharge pipe 12 is provided with valve 14；The end in described muddy water dissolved oxygen pond 3
Portion is provided with air inlet and water inlet, and described water inlet is connected with mud return line 11, described air inlet by aeration tube 13 with
Aerator 4 is connected, and the control signal input of described aerator 4 is connected with the control signal outfan of air weight controller 6, wind
The signal input part of amount controller 6 is connected with the signal output part of dissolved oxygen sensor 5, and described dissolved oxygen sensor 5 is arranged on micro-oxygen
The middle part of reactor 1, the bottom of described micro-oxygen reactor 1 is provided with water inlet and sludge reflux mouth, described water inlet and micro-oxygen
Reactor water inlet pipe 8 is connected, and described sludge reflux mouth is connected with the top in muddy water dissolved oxygen pond 3 by sludge reflux pump 7.
Detailed description of the invention two: present embodiment is unlike detailed description of the invention one: described micro-oxygen reactor 1 top is circle
Cylinder, bottom is vertebral body, and its height is 500mm, cylindrical a diameter of 100mm.Other are identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is unlike detailed description of the invention one or two: described sedimentation tank 2 is inverted triangle
Bullet, its height is 200mm, a diameter of 380mm.Other are identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is unlike one of detailed description of the invention one to three: described muddy water dissolved oxygen pond 3
For cylinder, its height is 250mm, a diameter of 100mm.Other are identical with one of detailed description of the invention one to three.
Detailed description of the invention five: present embodiment is unlike one of detailed description of the invention one to four: described micro-oxygen reactor enters
Water pipe 8, micro-oxygen reactor outlet pipe 9, mud return line 11 and excess sludge discharge pipe 12 use internal diameter to be 6.4mm, wall thickness
Silica gel tube for 1.6mm is made.Other are identical with one of detailed description of the invention one to four.
Detailed description of the invention six: present embodiment is unlike one of detailed description of the invention one to five: described sedimentation tank outlet pipe
10 is the flexible metal conduit of a diameter of 20mm.Other are identical with one of detailed description of the invention one to five.
Detailed description of the invention seven: utilize device described in detailed description of the invention one to process the method for Pig raising wastewater the most according to the following steps
Carry out:
One, low C/N is entered into from the bottom of micro-oxygen reactor 1 by micro-oxygen reactor water inlet pipe 8 than dry clear excrement Wastewater from Pig Farm
In micro-oxygen reactor 1, low C/N, senses at dissolved oxygen by the sludge blanket bottom micro-oxygen reactor 1 than dry clear excrement Wastewater from Pig Farm
Under the monitoring of device 5, controlling the dissolved oxygen amount in micro-oxygen reactor 1 is 0.3mg/L～1mg/L, and hydraulic detention time is 8h, passes through
The waste water that micro-oxygen processes micro-oxygen reactor outlet pipe 9 from micro-oxygen reactor 1 top overflows to sedimentation tank 2, then from sedimentation tank
Sedimentation tank outlet pipe 10 overflow on 2 tops is gone out, and obtains qualified water outlet；
Two, the sludgd deposition being mingled with in the waste water that micro-oxygen processes is back to the bottom of sedimentation tank 2 by mud return line 11
In muddy water dissolved oxygen pond 3, after aeration, obtain mud mixture, then by sludge reflux pump 7, mud mixture is back to
In micro-oxygen reactor 1；Bottom described sedimentation tank 2, remaining mud is discharged by excess sludge discharge pipe 12；Reflux ratio is 45:1.
Following example checking is used to the method have the benefit that
Embodiment one: combine Fig. 1 and illustrate that the present embodiment, the present embodiment utilize device process described in detailed description of the invention one to raise pigs useless
The method of water specifically sequentially includes the following steps:
One, low C/N is entered into from the bottom of micro-oxygen reactor 1 by micro-oxygen reactor water inlet pipe 8 than dry clear excrement Wastewater from Pig Farm
In micro-oxygen reactor 1, low C/N, senses at dissolved oxygen by the sludge blanket bottom micro-oxygen reactor 1 than dry clear excrement Wastewater from Pig Farm
Under the monitoring of device 5, controlling the dissolved oxygen amount in micro-oxygen reactor 1 is 0.3mg/L～1mg/L, and hydraulic detention time is 8h, passes through
The waste water that micro-oxygen processes micro-oxygen reactor outlet pipe 9 from micro-oxygen reactor 1 top overflows to sedimentation tank 2, then from sedimentation tank
Sedimentation tank outlet pipe 10 overflow on 2 tops is gone out, and obtains qualified water outlet；
Two, the sludgd deposition being mingled with in the waste water that micro-oxygen processes is back to the bottom of sedimentation tank 2 by mud return line 11
In muddy water dissolved oxygen pond 3, after aeration, obtain mud mixture, then by sludge reflux pump 7, mud mixture is back to
In micro-oxygen reactor 1；Bottom described sedimentation tank 2, remaining mud is discharged by excess sludge discharge pipe 12；Reflux ratio is 45:1.
Mud used by sludge blanket bottom micro-oxygen reactor 1 described in step one is secondary sedimentation tank of sewage treatment work mud.
Low C/N described in step one than the water quality index of dry clear excrement Wastewater from Pig Farm is: COD 135mg/L, NH4 +-N 110
Mg/L, NO3 --N 1.5mg/L。
Treatment effect is: COD clearance >=84%, NH4+-N clearance >=95%, TN clearance >=75%.
Embodiment two: combine Fig. 1 and illustrate that the present embodiment, the present embodiment utilize device process described in detailed description of the invention one to raise pigs useless
The method of water specifically sequentially includes the following steps:
One, low C/N is entered into from the bottom of micro-oxygen reactor 1 by micro-oxygen reactor water inlet pipe 8 than dry clear excrement Wastewater from Pig Farm
In micro-oxygen reactor 1, low C/N, senses at dissolved oxygen by the sludge blanket bottom micro-oxygen reactor 1 than dry clear excrement Wastewater from Pig Farm
Under the monitoring of device 5, controlling the dissolved oxygen amount in micro-oxygen reactor 1 is 0.3mg/L～1mg/L, and hydraulic detention time is 8h, passes through
The waste water that micro-oxygen processes micro-oxygen reactor outlet pipe 9 from micro-oxygen reactor 1 top overflows to sedimentation tank 2, then from sedimentation tank
Sedimentation tank outlet pipe 10 overflow on 2 tops is gone out, and obtains qualified water outlet；
Two, the sludgd deposition being mingled with in the waste water that micro-oxygen processes is back to the bottom of sedimentation tank 2 by mud return line 11
In muddy water dissolved oxygen pond 3, after aeration, obtain mud mixture, then by sludge reflux pump 7, mud mixture is back to
In micro-oxygen reactor 1；Bottom described sedimentation tank 2, remaining mud is discharged by excess sludge discharge pipe 12；Reflux ratio is 45:1.
Mud used by sludge blanket bottom micro-oxygen reactor 1 described in step one is the mud in the UASB processing Pig raising wastewater.
Low C/N described in step one than the water quality index of dry clear excrement Wastewater from Pig Farm is: COD 312mg/L, NH4 +-N 299
Mg/L, NO3 --N 0.9mg/L。
Treatment effect: COD clearance >=79%, NH4 +-N clearance >=74%, TN clearance >=75%.
Claims (3)
1. utilize the method that low C/N processes Pig raising wastewater than micro-oxygen biological treatment device of dry clear excrement Wastewater from Pig Farm, described low C/N is than doing micro-oxygen biological treatment device of clear excrement Wastewater from Pig Farm by micro-oxygen reactor (1), sedimentation tank (2), muddy water dissolved oxygen pond (3), aerator (4), dissolved oxygen sensor (5), air weight controller (6), sludge reflux pump (7), micro-oxygen reactor water inlet pipe (8), micro-oxygen reactor outlet pipe (9), sedimentation tank outlet pipe (10), mud return line (11), excess sludge discharge pipe (12), aeration tube (13) and valve (14) composition；The top of described micro-oxygen reactor (1) is provided with micro-oxygen reactor outlet pipe (9), the mouth of pipe of described micro-oxygen reactor outlet pipe (9) is arranged on the top of described sedimentation tank (2), the top of described sedimentation tank (2) is provided with sedimentation tank outlet pipe (10), the bottom outlet of described sedimentation tank (2) is connected with mud return line (11) and excess sludge discharge pipe (12), and described excess sludge discharge pipe (12) is provided with valve (14)；nullThe bottom of described muddy water dissolved oxygen pond (3) is provided with air inlet and water inlet，Described water inlet is connected with mud return line (11)，Described air inlet is connected with aerator (4) by aeration tube (13)，The control signal input of described aerator (4) is connected with the control output end of air weight controller (6)，The signal input part of air weight controller (6) is connected with the signal output part of dissolved oxygen sensor (5)，Described dissolved oxygen sensor (5) is arranged on the middle part of micro-oxygen reactor (1)，The bottom of described micro-oxygen reactor (1) is provided with water inlet and sludge reflux mouth，Described water inlet is connected with micro-oxygen reactor water inlet pipe (8)，Described sludge reflux mouth is connected with the top in muddy water dissolved oxygen pond (3) by sludge reflux pump (7)，It is characterized in that the method processing Pig raising wastewater specifically sequentially includes the following steps:
One, low C/N enters into micro-oxygen reactor (1) by micro-oxygen reactor water inlet pipe (8) from the bottom of micro-oxygen reactor (1) than dry clear excrement Wastewater from Pig Farm, low C/N passes through the sludge blanket of micro-oxygen reactor (1) bottom than dry clear excrement Wastewater from Pig Farm, under the monitoring of dissolved oxygen sensor (5), controlling the dissolved oxygen amount in micro-oxygen reactor (1) is 0.3mg/L～1mg/L, hydraulic detention time is 8h, the waste water processed through micro-oxygen overflows to sedimentation tank (2) from micro-oxygen reactor outlet pipe (9) at micro-oxygen reactor (1) top, go out from sedimentation tank outlet pipe (10) overflow on sedimentation tank (2) top again, obtain qualified water outlet；
Two, the sludgd deposition being mingled with in the waste water that micro-oxygen processes is back in muddy water dissolved oxygen pond (3) to the bottom of sedimentation tank (2) by mud return line (11), after aeration, obtain mud mixture, then by sludge reflux pump (7), mud mixture is back in micro-oxygen reactor (1)；The remaining mud in described sedimentation tank (2) bottom is discharged by excess sludge discharge pipe (12)；Reflux ratio is 45:1.
The method utilizing low C/N to process Pig raising wastewater than micro-oxygen biological treatment device of dry clear excrement Wastewater from Pig Farm the most according to claim 1, it is characterised in that mud used by the sludge blanket of the bottom of micro-oxygen reactor (1) described in step one is secondary sedimentation tank of sewage treatment work mud；
Low C/N described in step one than the water quality index of dry clear excrement Wastewater from Pig Farm is: COD 135mg/L, NH4 +-N 110mg/L, NO3 --N 1.5mg/L；
Treatment effect is: COD clearance >=84%, NH4+-N clearance >=95%, TN clearance >=75%.
The method utilizing low C/N to process Pig raising wastewater than micro-oxygen biological treatment device of dry clear excrement Wastewater from Pig Farm the most according to claim 1, it is characterised in that mud used by the sludge blanket of the bottom of micro-oxygen reactor (1) described in step one is the mud in the UASB processing Pig raising wastewater；
Low C/N described in step one than the water quality index of dry clear excrement Wastewater from Pig Farm is: COD 312mg/L, NH4 +-N 299mg/L, NO3 --N 0.9mg/L；
Treatment effect: COD clearance >=79%, NH4 +-N clearance >=74%, TN clearance >=75%.
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| CN201510063905.8A CN104591409B (en) | 2015-02-06 | 2015-02-06 | Method for treating pig farm wastewater by using micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater |
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| CN201510063905.8A CN104591409B (en) | 2015-02-06 | 2015-02-06 | Method for treating pig farm wastewater by using micro-aerobic biological treatment device for low-C/N-ratio manure dry-collection pig farm wastewater |
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| CN107445299A (en) * | 2017-09-18 | 2017-12-08 | 广东益康生环保服务有限公司 | A kind of split backflow declines oxygen denitrification reactor |
| CN107381817A (en) * | 2017-09-18 | 2017-11-24 | 广东益康生环保服务有限公司 | A kind of micro- oxygen denitrification reactor of cavitation-preventive |
| CN107381978A (en) * | 2017-09-18 | 2017-11-24 | 广东益康生环保服务有限公司 | A kind of micro- oxygen denitrification reactor of internal-circulation type |
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| CN1413926A (en) * | 2001-10-24 | 2003-04-30 | 杨造燕 | Sewage treatment process and its system |
| JP4017657B1 (en) * | 2007-05-15 | 2007-12-05 | 株式会社日本プラント建設 | Treatment method of wastewater containing organic matter |
| CN201512432U (en) * | 2009-10-24 | 2010-06-23 | 桂林理工大学 | Molasses alcohol waste water micro-aerophilic biological processing device for utilizing air to supply oxygen |
| CN102167480A (en) * | 2011-03-23 | 2011-08-31 | 中山大学 | Excess sludge decrement treatment method and device |
| CN204434361U (en) * | 2015-02-06 | 2015-07-01 | 哈尔滨工业大学 | A kind of low C/N is than micro-oxygen biological treatment device of dry clear excrement Wastewater from Pig Farm |
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