CN108467110A - The apparatus and method of photosynthetic bacteria processing soybean wastewater are utilized under infrared light anaerobic condition - Google Patents
The apparatus and method of photosynthetic bacteria processing soybean wastewater are utilized under infrared light anaerobic condition Download PDFInfo
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Abstract
Using the apparatus and method of photosynthetic bacteria processing soybean wastewater under infrared light anaerobic condition, belong to sewage treatment field.The device mainly have sewage raw water box, IC reactors, intermediate water tank and MBR reactor groups at.Waste water initially enters progress level-one Anaerobic Digestion in IC reactors, by hydrolysis acidification and fermentation methane phase, reduces COD contents in waste water.Waste water, which enters back into MBR reactors, later carries out secondary light according to Anaerobic Treatment, photosynthetic bacteria is metabolized in anaerobism infrared light according to raw photoheterotrophy is issued, the nitrogen phosphorus synthetic cell substance in water is also utilized while using organic matter, it can will be in the nutriment fast enriching to thalline in waste water, the crown_interception of film further ensures effluent quality, maintains the bacterial concentration in reactor.The invention has fully recycled the nutriment in soybean wastewater, produces the clean energy resourcies such as methane, and has the characteristics that energy-saving, synchronous organics removal, ammonia nitrogen, phosphorus.
Description
Technical field
The present invention relates under infrared light anaerobic condition utilize photosynthetic bacteria handle soybean wastewater apparatus and method,
Changing waste into resources is also achieved the purpose that while handling soybean wastewater.
Background technology
There is much soybean wastewater method in the country, wherein using anaerobic technique processing soybean wastewater and returning
The technique for receiving biogas is more mature, but passes through the still organic matter containing higher concentration of the sewage after Anaerobic Digestion
And ammonia nitrogen, can not qualified discharge, therefore general can all use the method processing bean product processing that anaerobic and aerobic technique is combined
Waste water.Aerobic biological process generally uses activated sludge process, oxidation pond process and SBR methods etc..The characteristics of soybean wastewater, arranges
High-volume big, organic concentration is high, complicated component.In processing, water and water quality are very uneven；SS is up to 1000-1500mg/L,
Under anaerobic condition easily scum layer is formed in wastewater surface；High-concentration waste water is easily acidified during Anaerobic Treatment, makes anaerobic unit
Treatment effect deteriorate；Aerobic stage uses Wastewater Treated by Activated Sludge Process, is also easy to produce sludge bulking, energy consumption is larger, and treatment facility accounts for
Ground area is larger.Therefore the more energy-efficient soybean wastewater New Process for Treatment important in inhibiting of exploitation.
After level-one Anaerobic Digestion, photosynthetic bacteria (mainly purple nonsulfur bacteria) processing high concentration organic waste is utilized
Water has floor space small, and organic loading is high, low power consumption and other advantages.Photosynthetic bacteria is different according to third contact of a total solar or lunar eclipse energy is issued in anaerobism infrared light
Metabolism is supported, while using organic matter and nitrogen phosphorus, also utilizes nitrogen phosphorus Fast back-projection algorithm itself thalline in waste water, it will be in waste water
Organic matter and nitrogen phosphorus are enriched with to internal.Photosynthetic bacteria also can convert organic matter to energy substance by anaerobic fermentation methane phase.
In addition photosynthetic bacteria is full of nutrition, and thalline is rich in amino acid, folic acid, B family vitamin and carotenoid, bacteriochlorophyll etc.
It is unicellular to also serve as animal feed, agricultural organic fertilizer, extraction for natural pigment, and protein content is up to 50-70%
Albumen etc..Photosynthetic bacteria is in high concentrated organic wastewaters such as livestock-raising waste water, beer waste water, food wastewater, alcohol waste waters at present
Aspect has had extensive use.
But the technical study of processing soybean wastewater is aerobic/anaerobic processing mostly or utilizes true of today
Bacterium, algae etc. are handled, such as a kind of " sides using soybean wastewater large-scale culturing micro-algae patent No. CN201410373329.2
Method " utilizes soybean wastewater culture energy microalgae, can both save great lot of water resources and nutritive salt, substantially reduce the culture of microalgae
Cost, and COD, TN and the TP that can be effectively removed in waste water；Patent No. CN201410152823.6 is " using at filamentous fungi
The technique for managing soybean wastewater " uses submerged fermentation technology, and filamentous fungi is cultivated in soybean wastewater and forms mycelium pellet, substantially
Degree reduces the organic matter in soybean wastewater；Patent No. CN204079706U " return flow system " mainly passes through gas
Floating pond, hydrolysis acidification, UASB, biological contact oxidation pond, the ponds MBR etc. handle soybean wastewater.And infrared light anaerobism item
The rare research of aspect of photosynthetic bacteria processing soybean wastewater is utilized under part.
The present invention is combined processing soybean wastewater using level-one IC reactors with secondary MBR reactor, utilizes light
The bacterium feature fast in the general ordinary light source of infrared light grown under anaerobic conditions speed ratio (incandescent lamp) is closed, is improved to beans system
The utilization rate of the substances such as organic matter, ammonia nitrogen, phosphorus in product processing waste water handles soybean wastewater, and water outlet biodegradability is good, compared with
Aerobic treatment process saves aeration energy consumption, while having harvested the photosynthetic bacteria that resourcebility utilizes.
Invention content
The purpose of the present invention is realize the processing of soybean wastewater, it is proposed that using photosynthetic under infrared light anaerobic condition
The apparatus and method of bacterial treatment soybean wastewater.In the device, waste water, which initially enters progress level-one in IC reactors, to be detested
Oxygen digestion process reduces COD contents in waste water by hydrolysis acidification and fermentation methane phase.Waste water enters back into MBR reactors later
Middle progress secondary light shines Anaerobic Treatment, and photosynthetic bacteria, according to raw photoheterotrophy metabolism is issued, is utilizing organic matter in anaerobism infrared light
While also utilize nitrogen phosphorus synthetic cell substance in water, can by the nutriment fast enriching to thalline in waste water, film
Crown_interception further ensures effluent quality, maintains the bacterial concentration in reactor.The invention has fully recycled beans
Nutriment in product processing waste water, produces the clean energy resourcies such as methane, and with energy-saving, synchronous organics removal,
The characteristics of ammonia nitrogen, phosphorus.
1. being existed using the apparatus and method of photosynthetic bacteria processing soybean wastewater, feature under infrared anaerobic condition
In：Including sewage raw water box (1), IC reactors (2), intermediate water tank (3) and the MBR reactors (4) being linked in sequence；Sewage raw water
Case (1) is connected by water inlet pipe (1-1) and intake pump (1-2) with IC reactors (2) bottom end；Mixing is equipped in IC reactors (2)
Area (2-1), the first anaerobic zone (2-2), the second anaerobic zone (2-3), gas-water separation zone (2-4), at the same equipped with gas gathering mask (2-5),
Return duct (2-6), biogas-lift pipe (2-7), level-one three phase separator (2-8), two level three phase separator (2-9) and heating rod
(2-10) carries out level-one Anaerobic Treatment；Stirring for inside reactor liquid is realized by the outer circulation pipeline (2-11) of IC reactors
It mixes, treated, and waste water is discharged to intermediate water tank (3) by outlet pipe (2-12), then passes through intake pump (3-1) and water inlet pipe (3-2)
Waste water after coagulation is pumped into MBR reactors (4) and carries out secondary light according to Anaerobic Treatment.It is set in MBR reactors (4) poly-
Propylene hollow fiber membrane filtration device and gas circulation agitating device.Polypropylene hollow fiber membrane (4-1) retains photosynthetic bacteria
In the reactor, by outlet pipe (4-2) and water outlet pump (4-3), by treated, reactor is discharged in water.Distance MBR reactors
(4) 40W, the IR-LED infrared lamps (4-4) of 850nm are respectively placed in both sides.Gas circulation agitating device includes condenser (4-
5), pressure gauge (4-6), film air pump (4-7), pressure valve (4-8), mass flow control meter (4-9) and aeration plate (4-10),
The stirring of inside reactor is realized by internal gas circulation.
Soybean wastewater is in the process flow of this device：Waste water initially enters progress level-one anaerobism in IC reactors
Digestion process reduces COD contents in waste water by hydrolysis acidification and fermentation methane phase.Waste water enters back into MBR reactors later
It carries out secondary light and shines Anaerobic Treatment, photosynthetic bacteria, according to raw photoheterotrophy metabolism is issued, is utilizing organic matter in anaerobism infrared light
The nitrogen phosphorus synthetic cell substance in water, by the nutriment fast enriching to thalline in waste water, the retention of film are also utilized simultaneously
Effect further ensures effluent quality, maintains the bacterial concentration in reactor.
The apparatus and method of photosynthetic bacteria processing soybean wastewater, feature are utilized under the infrared anaerobic condition of the present invention
It is to include the following contents：
1) startup stage：Water inlet is the soaking bean water in the soybean wastewater after precipitation, a concentration of 4000- of COD
8000mg/L, BOD/COD are up to 0.55-0.65, and SS is up to 1000-1500mg/L.Sewage disposal is added into IC reactors (2)
The anaerobically digested sludge of factory, the Rhodopseudomonas palustris that the middle inoculation of MBR reactors (4) is enriched with from soybean wastewater, just
Beginning thalline OD660 value is 1.50, and inoculum concentration 20%-30%, sludge concentration maintains 3000-3500mg/L.IC reactors (2)
Since 20 DEG C of room temperatures, the temperature of reactor is promoted to 35 DEG C according to the speed of 3 DEG C/d.Start starting stage maintenance IC reactions
Device (2) inlet COD concentration is 800-1000mg/L, and volumetric loading is improved by being stepped up COD loads, this stage is anti-as IC
When answering the COD in device (2), nitrogen removal rate all to reach 80% or more, VFA to maintain 2.5-3mmol/L, it is negative to improve a COD
Lotus, load amplification are 15%, and until IC reactors (2), inlet COD loading reaches 100%.IC reactors (2) and MBR reactors
(4) when COD, nitrogen removal rate in reach 90% or more, it is believed that system starts successfully.
2) normal operating phase：
(1) inflow of IC reactors (2) and MBR reactors (4) is 20-25L/d, IC reactors (2) inlet COD concentration
For 4000-4500mg/L, NH4 +A concentration of 25-30mg/L of-N, volumetric loading are 5.3-7.0kgCOD/ (m3/d)；MBR reactors
(4) inlet COD concentration is 800-1000mg/L, NH4 +A concentration of 50-60mg/L of-N, it is organic in maintaining MBR reactors (4) to intake
The ratio of object and ammonia nitrogen concentration is close to 100:6, volumetric loading is 0.8-1.0kgCOD/ (m3/d)。
(2) hydraulic detention time of IC reactors (2) is 17h-20h, and the hydraulic detention time of MBR reactors (4) is 20-
For 24 hours, continuous operation device, COD≤100mg/L, TN≤15mg/L in system effluent quality, and maintain 30 days or more, that is, think
System has reached stable state.
(3) continuous operational system realizes the removal of organic matter and ammonia nitrogen in soybean wastewater.
It is and existing using the apparatus and method of photosynthetic bacteria processing soybean wastewater under the infrared anaerobic condition of the present invention
Technique is compared and is had the advantage that：
(1) biological denitrification process more traditional under anaerobic condition need not provide oxygen.
(2) reaction rate is fast under infrared light, and HRT is shorter, and capital cost is low.
(3) it ferments in system IC reactors and produces biogas energy, in the photosynthetic bacterial thallus increased in MBR reactors
Containing 70% or so protein, and without noxious materials such as heavy metals, animal feed etc. can be made and carry out recycling.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram for handling soybean wastewater under infrared anaerobic condition using photosynthetic bacteria.
In Fig. 1：1 is sewage raw water box, and 2 be IC reactors, and 3 be intermediate water tank, and 4 be MBR reactors, and 1-1 is water inlet pipe,
1-2 is intake pump, and 2-1 is mixed zone, and 2-2 is the first anaerobic zone, and 2-3 is the second anaerobic zone, and 2-4 is gas-water separation zone, and 2-5 is
Gas gathering mask, 2-6 are return duct, and 2-7 is biogas-lift pipe, and 2-8 is level-one three phase separator, and 2-9 is two level three phase separator, 2-
10 be heating rod, and 2-11 is outer circulation pipeline, and 2-12 is outlet pipe, and 3-1 is intake pump, and 3-2 is water inlet pipe, and 4-1 is polypropylene
Hollow-fibre membrane, 4-2 are outlet pipe, and 4-3 is water outlet pump, and 4-4 is near-infrared lamp, and 4-5 is condenser, and 4-6 is pressure gauge, 4-7
For film air pump, 4-8 is pressure valve, and 4-9 is mass flow control meter, and 4-10 is aeration plate.
Specific implementation mode：
1. being existed using the apparatus and method of photosynthetic bacteria processing soybean wastewater, feature under infrared anaerobic condition
In：Including sewage raw water box (1), IC reactors (2), intermediate water tank (3) and the MBR reactors (4) being linked in sequence；Sewage raw water
Case (1) is connected by water inlet pipe (1-1) and intake pump (1-2) with IC reactors (2) bottom end；Mixing is equipped in IC reactors (2)
Area (2-1), the first anaerobic zone (2-2), the second anaerobic zone (2-3), gas-water separation zone (2-4), at the same equipped with gas gathering mask (2-5),
Return duct (2-6), biogas-lift pipe (2-7), level-one three phase separator (2-8), two level three phase separator (2-9) and heating rod
(2-10) carries out level-one Anaerobic Treatment；Stirring for inside reactor liquid is realized by the outer circulation pipeline (2-11) of IC reactors
It mixes, treated, and waste water is discharged to intermediate water tank (3) by outlet pipe (2-12), then passes through intake pump (3-1) and water inlet pipe (3-2)
Waste water after coagulation is pumped into MBR reactors (4) and carries out secondary light according to Anaerobic Treatment.It is set in MBR reactors (4) poly-
Propylene hollow fiber membrane filtration device and gas circulation agitating device.Polypropylene hollow fiber membrane (4-1) retains photosynthetic bacteria
In the reactor, by outlet pipe (4-2) and water outlet pump (4-3), by treated, reactor is discharged in water.Distance MBR reactors
(4) 40W, the IR-LED infrared lamps (4-4) of 850nm are respectively placed in both sides.Gas circulation agitating device includes condenser (4-
5), pressure gauge (4-6), film air pump (4-7), pressure valve (4-8), mass flow control meter (4-9) and aeration plate (4-10),
The stirring of inside reactor is realized by internal gas circulation.
It is process object with the soaking bean water in the soybean wastewater of certain tofu factory, specific water quality is as follows：COD is
4000-4500mg/L, NH4 +- N is 25-30mg/L, BOD/COD 0.55-0.65, SS 1000-1500mg/L.Pilot system
As shown in Figure 1, IC reactors (2) dischargeable capacity is 15L, MBR reactors (4) dischargeable capacity is 20L, and reactor is all made of organic
Glass is made.
Concrete operations are as follows：
1) startup stage：Water inlet is the soaking bean water in the soybean wastewater after precipitation, is added into IC reactors (2)
The anaerobically digested sludge of sewage treatment plant, the marsh that the middle inoculation of MBR reactors (4) is enriched with from soybean wastewater are red false single
Born of the same parents bacterium, initial thalline OD660 values are 1.50, and inoculum concentration 20%, sludge concentration maintains 3000-3500mg/L.IC reactors
(2) since 20 DEG C of room temperatures, the temperature of reactor is promoted to 35 DEG C according to the speed of 3 DEG C/d.Start starting stage maintenance IC
Reactor (2) inlet COD concentration is 800-1000mg/L, and volumetric loading is improved by being stepped up COD loads.This stage works as
When COD, nitrogen removal rate in IC reactors (2) reach 80% or more, VFA and maintain 2.5-3mmol/L, improve primary negative
Lotus, load amplification are 15%, and until IC reactors (2), inlet COD loading reaches 4000-4500mg/L.IC reactors (2) and
When COD, nitrogen removal rate in MBR reactors (4) reach 90% or more, it is believed that system starts successfully.
2) normal operating phase：
(1) inflow of IC reactors (2) and MBR reactors (4) is 20L/d, IC reactors (2) inlet COD concentration
For 4000-4500mg/L, NH of intaking4 +A concentration of 25-30mg/L of-N, volumetric loading are 5.3-7.0kgCOD/ (m3/d)；MBR is anti-
It is 800-1000mg/L to answer device (4) inlet COD concentration, NH of intaking4 +A concentration of 50-60mg/L of-N, maintain MBR reactors (4) into
The ratio of Organic substance in water and ammonia nitrogen concentration is close to 100:6, volumetric loading is 0.8-1.0kgCOD/ (m3/d)。
(2) hydraulic detention time of IC reactors (2) is 18h, and the hydraulic detention time of MBR reactors (4) is for 24 hours, even
Continuous running gear, COD≤100mg/L, TN≤15mg/L in system effluent quality, and after maintaining 30 days, that is, think that system reaches
Stable state.
(3) continuous operational system realizes the removal of organic matter and ammonia nitrogen in soybean wastewater.
Test result shows：After stable, by IC reactors (2), COD is 800- to soybean wastewater afterwards
1000mg/L, NH4 +- N is 50-60mg/L,；COD is 80-100mg/L, NH after MBR reactors (4)4 +- N is 10-15mg/
L, test result show that the pollutants such as system water outlet COD, TN reach discharge standard.
Claims (2)
1. utilizing the device of photosynthetic bacteria processing soybean wastewater under infrared anaerobic condition, it is characterised in that：Including sequence
Sewage raw water box (1), IC reactors (2), intermediate water tank (3) and the MBR reactors (4) of connection；Sewage raw water box (1) by into
Water pipe (1-1) and intake pump (1-2) are connected with IC reactors (2) bottom end；Mixed zone (2-1), first are equipped in IC reactors (2)
Anaerobic zone (2-2), the second anaerobic zone (2-3), gas-water separation zone (2-4), at the same equipped with gas gathering mask (2-5), return duct (2-6),
Biogas-lift pipe (2-7), level-one three phase separator (2-8), two level three phase separator (2-9) and heating rod (2-10) carry out
Level-one Anaerobic Treatment；The stirring of inside reactor liquid is realized by the outer circulation pipeline (2-11) of IC reactors, treated
Waste water is discharged to intermediate water tank (3) by outlet pipe (2-12), then by intake pump (3-1) and water inlet pipe (3-2) by coagulation
Waste water afterwards, which is pumped into MBR reactors (4), carries out secondary light according to Anaerobic Treatment；Hollow polypropylene fibre is set in MBR reactors (4)
Tie up film filter and gas circulation agitating device；Polypropylene hollow fiber membrane (4-1) retains photosynthetic bacteria in the reactor,
By outlet pipe (4-2) and water outlet pump (4-3), by treated, reactor is discharged in water；Respectively place one in MBR reactors (4) both sides
The IR-LED infrared lamps (4-4) of 40W, 850nm；Gas circulation agitating device includes condenser (4-5), pressure gauge (4-6), film
Air pump (4-7), pressure valve (4-8), mass flow control meter (4-9) and aeration plate (4-10) pass through internal gas circulation reality
The stirring of existing inside reactor.
2. the method for application device as described in claim 1, which is characterized in that include the following steps：
1) startup stage：Water inlet for precipitation after soybean wastewater in soaking bean water, a concentration of 4000-8000mg/L of COD,
The mass concentration ratio of BOD/COD is up to 0.55-0.65, and SS is up to 1000-1500mg/L；Sewage is added into IC reactors (2)
The anaerobically digested sludge for the treatment of plant, the red false unit cell in marsh that the middle inoculation of MBR reactors (4) is enriched with from soybean wastewater
Bacterium, initial thalline OD660 values are 1.50, and inoculum concentration 20%-30%, anaerobically digested sludge concentration maintains 3000-3500mg/
L；IC reactors (2) promote the temperature of reactor to 35 DEG C according to the speed of 3 DEG C/d since 20 DEG C of room temperatures；Start initial
It is 800-1000mg/L that stage, which maintains IC reactors (2) inlet COD concentration, and it is negative to improve volume by being stepped up COD loads
Lotus, this stage work as COD, nitrogen removal rate in IC reactors (2) and all reach 80% or more, VFA and maintain 2.5-3mmol/L
When, a COD load is improved, each load amplification is 15%, and inlet COD loading reaches 100% until IC reactors (2)；IC
When reactor (2) and COD, nitrogen removal rate in MBR reactors (4) all reach 90% or more, it is believed that system starts successfully；
2) normal operating phase：
(1) inflow of IC reactors (2) and MBR reactors (4) is 20-25L/d, and IC reactors (2) inlet COD concentration is
4000-4500mg/L, NH4 +A concentration of 25-30mg/L of-N, volumetric loading are 5.3-7.0kgCOD/ (m3/d)；MBR reactors (4)
Inlet COD concentration is 800-1000mg/L, NH4 +A concentration of 50-60mg/L of-N, maintain MBR reactors (4) into Organic substance in water with
The ratio of ammonia nitrogen concentration is close to 100:6, volumetric loading is 0.8-1.0kgCOD/ (m3/d)；
(2) hydraulic detention time of IC reactors (2) is 17h-20h, and the hydraulic detention time of MBR reactors (4) is 20-24h,
Continuous operation device, COD≤100mg/L and TN≤15mg/L in system effluent quality, and maintain 30 days or more, that is, think system
Stable state is reached；
(3) continuous operational system realizes the removal of organic matter and ammonia nitrogen in soybean wastewater.
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| CN109650534A (en) * | 2018-12-21 | 2019-04-19 | 海南大学 | A kind of method of livestock breeding wastewater producing microbial mycoprotein |
| CN111077096A (en) * | 2019-12-20 | 2020-04-28 | 山东大学 | Utilize equipment of ultraviolet detection technique on-line measuring volatile fatty acid |
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