CN204661507U - A kind of equipment recycling hydrothermal liquefaction waste water Middle nutrition element - Google Patents
A kind of equipment recycling hydrothermal liquefaction waste water Middle nutrition element Download PDFInfo
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- CN204661507U CN204661507U CN201520337562.5U CN201520337562U CN204661507U CN 204661507 U CN204661507 U CN 204661507U CN 201520337562 U CN201520337562 U CN 201520337562U CN 204661507 U CN204661507 U CN 204661507U
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- photosynthetic bacterium
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Abstract
The utility model proposes a kind of equipment recycling hydrothermal liquefaction waste water Middle nutrition element, comprise photosynthetic bacterium incubator, microdisk electrode device, filtering unit, air admission unit; Filtering unit is provided with ultra-filtration membrane, purified liquor outlet and concentrated solution outlet; Air admission unit comprises air compressor, CO
2gas tank, mixed air vessel, mixed air vessel connects microdisk electrode device; Air compressor connects photosynthetic bacterium incubator by gas piping.The utility model is by photosynthetic bacterium process, micro-algae process and membrane filtration and gather in the crops triplicity, achieves the significantly degraded of sewage middle and high concentration organic significantly degraded and nitrogen element.This reactor has accomplished the cascade utilization of hydrothermal liquefaction waste water Middle nutrition material and the recycling of water resources, and the biomass that may be used for thermochemistry production bio-crude oil can be produced, achieve the multi-efficiency that contaminant degradation, resource recycling and biomass resource are produced.
Description
Technical field
The utility model belongs to field of waste water treatment, is specifically related to a kind of its equipment of wastewater treatment utilizing microorganism.
Background technology
Hydrothermal liquefaction waste water is that micro-algae, changing food waste, pig manure are converted into the waste water produced in bio-crude oil process by thermochemical method, this waste water is rich in the major elements such as carbon, nitrogen, phosphorus, be rich in again various trace elements, part heavy metal and aldehydes matter, wherein COD, TN, NH
3-N, TP can respectively up to 200000,14000,8000,2000mg/L.If with traditional this waste water of process for treating industrial waste water process, not only cause processing costs high, and great carbon, nitrogen, phosphor resource can be caused to waste.Current hydrothermal liquefaction waste water does not also have ripe treatment process, the lab scale stage is also in the treatment research of this waste water, the diluent of this waste water is mainly utilized to cultivate micro-algae, water treatment effect and micro-algae output is optimized by regulation and control waste water N/P ratio, pH value, waste water and Medium Proportion, thus reach the recycling of waste water, and alleviate follow-up cost for wastewater treatment.But compare Conventional waste water, in this waste water, harmful toxic matter is more, produce algal grown and suppress, after micro-algae grows 6-8 days wherein, biomass just can reach maximum, and required growth time is longer.
Known by describing above, utilize micro-algae process hydrothermal liquefaction waste water to there is the low problem of Nutrient Cycling utilising efficiency, in waste water, high organic carbon concentration also can absorb nitrogen phosphoric by micro-algae always, limits it to nutraceutical utilization.In order to improve the degradation efficiency of carbon nitrogen phosphoric in this waste water, wastewater characteristics need be combined with microbial physiology biochemical characteristic, from the natural law of contaminant degradation, reselect the microorganism main body of wastewater treatment, research carbon nitrogen phosphoric returns and coupling between microorganism, thus reaches the maximum output of this waste water resource utilization and biomass to the full extent.
Photosynthetic bacterium is that a large class is similar to micro-algae, there is the microorganism of two cover energy synthesis transformation systems, can survive under illumination or aerobic conditions, and utilize that scope is wide, organic loading tolerance is high, metabolic mechanism is flexible to organic, but its degradation of contaminant is not thorough.It mainly seeks photoheterotrophy, can small organic molecule be carbon source, and organism utilizes scope wide, but photosynthetic bacterium have the degraded limit, final COD rests on 300-500mg/L, and photosynthetic bacterium is better to multiple high concentrated organic wastewater treatment effect to have the experimental results to show.Micro-algae is a kind of light and efficiency is high, strong adaptability, growth cycle are short biology, to ammonium salt, phosphoric acid salt and light concentration organic pollutant good degrading effect, is used to sewage disposal very early.The degraded of micro-algae to pollutent mainly relies on photosynthesis, and in photoautotrophy, it can only utilize CO
2as carbon source, and at CO
2time sufficient, micro-algae can be improved the absorption and use efficiency of nitrogen phosphorus substance; In chemoheterotrophy, it utilizes organism scope narrower, and tolerance organic loading is lower, is the highlyest about 6000mg/L.
At present more about carrying out separately the research that photosynthetic bacterium and micro-algae dispose of sewage, but it is less for the treatment of the research of waste water to be coupled, and its coupling mechanism is unclear.Both material energy metabolism approach respectively has feature, makes both in coupled system to the demand of light, oxygen and different to carbon, nitrogen, phosphorous metabolism approach, makes the Fourier Series expansion technique formed can not be applied to the process of crude production waste water simply.
Utility model content
For the weak point of this area, the purpose of this utility model proposes a kind of equipment recycling hydrothermal liquefaction waste water Middle nutrition element.
Realizing the utility model object technical scheme is:
Recycle hydrothermal liquefaction waste water Middle nutrition element and produce the equipment of biomass material, comprise photosynthetic bacterium incubator, microdisk electrode device, photosynthetic bacterium filtering unit, micro-algae filtering unit, air admission unit;
Described photosynthetic bacterium incubator is provided with waste water inlet, and described photosynthetic bacterium incubator connects described photosynthetic bacterium filtering unit by pipeline, and described microdisk electrode device connects described micro-algae filtering unit by pipeline;
Described photosynthetic bacterium filtering unit is provided with ultra-filtration membrane, purified liquor outlet and concentrated solution outlet, and described purified liquor outlet connects described microdisk electrode device by pipeline; Described micro-algae filtering unit is provided with ultra-filtration membrane, clear liquid drainage and concentrated solution outlet;
Described air admission unit comprises air compressor, CO
2gas tank, mixed air vessel, air compressor and CO
2gas tank all connects described mixed air vessel by gas piping, and described mixed air vessel connects described microdisk electrode device by gas piping; Described air compressor connects photosynthetic bacterium incubator by gas piping.
Wherein, described photosynthetic bacterium incubator is cylindrical printing opacity plexiglass box, and be provided with aeration plate bottom described photosynthetic bacterium incubator, this aeration plate connects air compressor by gas piping;
Wherein, described microdisk electrode device is cylindrical printing opacity plexiglass box, and be provided with aeration plate bottom described microdisk electrode device, this aeration plate connects mixed air vessel by gas piping.
Preferably, described ultra-filtration membrane is inner pressed hollow-fibre membrane.
Wherein, the pipeline connecting described photosynthetic bacterium filtering unit is provided with surge pump, valve, tensimeter and spinner-type flowmeter.
Similarly, the pipeline connecting described micro-algae filtering unit is provided with surge pump, valve, tensimeter and spinner-type flowmeter.
Use the equipment that the utility model proposes, to the recoverying and utilizing method of hydrothermal liquefaction waste water Middle nutrition element, comprise step:
1) waste water that produces of hydrothermal liquefaction method production bio-crude oil, being diluted with water to COD concentration is 18000 ~ 20000mg/L, and regulates dilution waste water ph to 6.5 ~ 7.5 afterwards by the HCl of 1mol/L and/or NaOH solution;
2) photosynthetic bacterium is inoculated in step 1) in gained waste water, inoculum size is 0.24g/L to 0.30g/L dry weight, cultivates;
3) by step 2) in the photosynthetic bacterium of inoculation cultivate after 11 ~ 13 days, waste water is separated with photosynthetic bacterium ultra-filtration membrane, obtains concentrated solution and the water outlet of photosynthetic bacterium;
4) to step 3) be separated after water outlet in inoculate micro-algae, inoculum size is 0.13g/L to 0.18g/L dry weight; Daytime passes into CO
2micro-algae is cultivated with air gas mixture; Cultured continuously 6-8 days, makes the growth of micro-algae arrive plateau.
5) by step 4) cultivate complete micro-algae and be separated with ultra-filtration membrane again with the composite waste of hydrothermal liquefaction waste water, obtain concentrated solution and the final outflow water of micro-algae.
Wherein, the photosynthetic bacterium used is Rhodopseudomonas palustris (Rhodopseudomonaspalustris), for Rhodopseudomonas (Rhodopseudomonas), strain number is 1.8929, purchased from General Microbiological Culture preservation administrative center of the Chinese Academy of Sciences (address: No. 3, Yard 1, BeiChen xi Road, Chaoyang District, Beijing City Institute of Microorganism, Academia Sinica); Micro-algae is chlorella Chlorellasp., and for Chlorella belongs to, algae strain is numbered: FACHB-1067, purchased from aquatic institute of the Chinese Academy of Sciences (address: hydrobiont institute of Chinese Academy of Sciences algae kind storehouse, No. 7, South Road, East Lake, Luo Jia Shan, Wuhan).
Wherein, in the waste water that produces of described hydrothermal liquefaction method production bio-crude oil, COD is 170000-220000mg/L, TN concentration is 8000-14000mg/L, NH
3-N concentration is 4000-10000mg/L, TP concentration 1000-2000mg/L, and pH value is 9.5-13.5.
Further, described step 2) in the culture condition of photosynthetic bacterium be: intensity of illumination is 3000-4000lx, passes into air, and air flow quantity is 0.1-0.2L/minL
-1.
Preferably, described step 3) in, ultra-filtration membrane used is inner pressed hollow-fibre membrane, and permeant flux is 80-120L/Hm
2.
Wherein, described step 3) in, Ultra filtration membrane operational condition is as follows: operating pressure is 0.15-0.3MPa, and maximum permeable membrane pressure reduction is 0.3MPa.The maximum backwash pressure of this ultra-filtration membrane is 0.15MPa.
Further, described step 4) in, the culture condition of micro-algae is: intensity of illumination is 2200-3000lx, and light dark period is than being 10-14:14-10; Air and CO is passed in light application time
2mixed gas, mixed gas flow weight range is 0.1-0.2L/minL
-1, keep waste water ph 6.8 ~ 7.3 for micro algae growth supplementary carbon source, non-light application time stuffiness.
Preferably, the culture condition of micro-algae is: intensity of illumination is 2200-3000lx, and light dark period is than being 12:12; Air and CO is passed in light application time
2mixed gas, CO
2account for 2 ~ 4% of volume of air.Mixed gas flow weight range can be 0.1-0.2L/minL
-1.
Wherein, described step 5) in, Ultra filtration membrane operational condition is as follows: operating pressure is 0.15-0.3MPa, and maximum permeable membrane pressure reduction is 0.3MPa.The maximum backwash pressure of this ultra-filtration membrane is 0.15MPa.
The beneficial effects of the utility model are:
The cultivation of photosynthetic bacterium, wastewater treatment and the cultivation of micro-algae and the results of wastewater treatment and photosynthetic bacterium and micro-algae combine by the utility model, define a set of organic whole, with the process achieving hydrothermal liquefaction waste water, the step of waste water Middle nutrition element is recycled, and the recovery of thalline and frond and the production of biomass material.。After this process process, the concentration that the COD concentration of hydrothermal liquefaction waste water reduces more than 95%, TN and TP also reduces by more than 70%, dramatically reduces the subsequent disposal burden of this waste water.In addition, the biomass of this system can realize 4-5 and doubly increases.
Accompanying drawing explanation
Fig. 1 is the comprehensive utilization device structure diagram of hydrothermal liquefaction waste water.
In figure, 1 is waste water inlet, and 2 is water outlet, 3 is aeration plate, and 4 is photosynthetic bacterium incubator, and 5 is microdisk electrode device, 6 is the import of water-in 7 algae liquid, and 8 be gas mixture admission passage 9 is spinner-type flowmeter, and 10 is vacuum pressure gauge, 11 is inner pressed hollow fiber film assembly, and 111 is purified liquor outlet, 112 concentrated solution outlets, 12 is surge pump, 13 be air compressor 14 is air-pressure controlling valve, and 15 is air intake conduit, and 16 is CO
2gas tank, 17 is CO
2pressure control valve, 18 is mixed air vessel, and 19 is the inner pressed hollow fiber film assembly of micro-algae filtering unit, and 191 is clear liquid drainage, and 192 is the concentrated solution outlet of micro-algae filtering unit.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is described in further detail.
If not otherwise specified, the means adopted in embodiment are the technique means of this area routine.
Embodiment 1
As Fig. 1, carry out recycling hydrothermal liquefaction waste water Middle nutrition element and the equipment producing biomass material comprises: photosynthetic bacterium incubator 4, microdisk electrode device 5, photosynthetic bacterium filtering unit, micro-algae filtering unit, air admission unit;
Photosynthetic bacterium incubator 4 is cylindrical printing opacity plexiglass box, is provided with waste water inlet 1 and water outlet 2, and be provided with the aeration plate 3 for passing into air bottom photosynthetic bacterium incubator 4, aeration plate 3 is connected with air intake conduit 15.Bottom distance incubator, 15 ~ 20cm place arranges influent waste water 1, in arranging (distance bottom inside 1.5 ~ 2cm) water outlet 2 a little more than aeration plate place, makes both distributions in axisymmetrical.
Microdisk electrode device 5 is cylindrical printing opacity plexiglass box, being provided with water-in 6 and algae liquid import 7, being provided with for passing into CO bottom microdisk electrode device 5
2with the aeration plate 3 of air Mixture, aeration plate 3 is connected with gas mixture admission passage 8.Bottom distance incubator, 15 ~ 20cm place arranges water-in 6, in arranging (distance bottom inside 1.5 ~ 2cm) fluid pipeline a little more than aeration plate 3 place, makes both distributions in axisymmetrical.
Photosynthetic bacterium filtering unit comprises: the inner pressed hollow fiber film assembly 11 of the surge pump 12 connected successively by flexible pipe, spinner-type flowmeter, vacuum pressure gauge 10 and photosynthetic bacterium filtering unit and forming, surge pump 12 is for carrying stoste in photosynthetic bacterium incubator 4 to inner pressed hollow fiber film assembly, and spinner-type flowmeter is for regulating flow and the pressure of conveying liquid; Stoste in photosynthetic bacterium incubator 4 is separated in inner pressed hollow fiber film assembly, hydrothermal liquefaction wastewater dilution liquid after ultrafiltration enters microdisk electrode device 5 from the purified liquor outlet 111 of photosynthetic bacterium filtering unit, and photosynthetic bacterium concentrated solution flows out through the concentrated solution outlet 112 of photosynthetic bacterium filtering unit.The maximum backwash pressure of this inner pressed hollow fiber film assembly is 0.15MPa.Microdisk electrode device 5 fluid pipeline connects micro-algae filtering unit, and it comprises the inner pressed hollow fiber film assembly 19 of micro-algae filtering unit, and the setting of other assemblies is the same with photosynthetic bacterium filtering unit.Stoste in microdisk electrode device 5 is separated in inner pressed hollow fiber film assembly, discharges after ultrafiltration from clear liquid drainage 191, and micro-algae concentrated solution flows out through the concentrated solution outlet 192 of micro-algae filtering unit.
Wherein, air admission unit comprises: the air compressor 14 providing air source; Air intake conduit 15 is provided with air-pressure controlling valve 14 and spinner-type flowmeter 9; The air intake conduit of leading to mixed air vessel is also provided with air pressure valve and spinner-type flowmeter;
Described CO
2admission passage is connected with CO
2gas tank 16, CO
2admission passage is provided with CO
2pressure control valve 17 and CO
2gas meter; Mixed air vessel 18 connects CO
2admission passage and air intake conduit, gas mixture admission passage 8 connects mixed air vessel 19 and aeration plate 3.
Adopt the present embodiment equipment, its initial COD of the hydrothermal liquefaction waste water of process is 195600mg/L, TN concentration is 11900mg/L, TP concentration 1240mg/L, and pH value is 12.6.
Comprehensive treating process step:
One, water pump is passed through, in photosynthetic bacterium incubator 4, pump into hydrothermal liquefaction waste water, diluting water by waste water inlet 1 and be in the photosynthetic bacteria liquid of logarithmic phase, control three kinds of total liquid volume and be about 2/3 of photosynthetic bacterium incubator 4, wherein the amount of hydrothermal liquefaction waste water is about 1/10, diluting water and photosynthetic bacteria liquid volume and be 9/10, photosynthetic bacterium inoculum size is 0.30g/L dry weight, regulates pH value to 7.0 in waste water with NaOH or HCl of 1mol/L; Now, the COD of hydrothermal liquefaction wastewater dilution liquid is 19000mg/L, TN concentration is 1050mg/L, TP concentration 117mg/L;
Two, open air compressor 14, open air-pressure controlling valve, regulate spinner-type flowmeter 9, make air enter photosynthetic bacterium incubator 4 by air intake conduit 15, aeration plate 3, by the photosynthetic bacterium mixing in waste water, control air flow quantity is 0.2L/minL
-1, intensity of illumination controls as 3000lx, and incubation time is 12 days, and now bacterial growth arrives platform area;
Three, close air compressor 14, close air-pressure controlling valve, make air intake conduit 15 stop ventilation;
Four, photosynthetic bacterium ultrafiltration system is opened.Open water outlet 2, water-in 6, open surge pump 12, regulate spinner-type flowmeter, the water inlet flux controlling ultra-filtration membrane is 80L/Hm
2, operating pressure is 0.20MPa; Clear liquid after ultrafiltration flow to microdisk electrode device 5 through hollow fiber film assembly purified liquor outlet 111, and the photosynthetic bacterium concentrated solution after ultrafiltration is flowed out by membrane module concentrated solution outlet 112, with other container collection photosynthetic bacterium concentrated solutions.
Clear liquid COD concentration after clear liquid ultrafiltration after ultrafiltration is 3610mg/L, TN concentration be 354mg/L, TP concentration is 64mg/L, and pH value is 8.7.
Five, the liquid in photosynthetic bacterium incubator to be exhausted, closes water outlet 2, water-in 6, surge pump 12 power supply sequentially successively;
Six, open algae liquid import 7, according to the volume of the clear liquid after ultrafiltration, pump into fresh micro-algae seed algae liquid, micro-algae inoculum size is 0.13g/L dry weight, and total liquid volume is no more than 2/3 of microdisk electrode device 5;
Seven, mixing air-channel system is opened.Open air compressor 14, open air-pressure controlling valve, regulate spinner-type flowmeter 9, control air flow quantity is 195ml/minL
-1; Open CO
2gas-pressure controlling valve door, regulates spinner-type flowmeter 9, control CO
2gas flow is 5ml/minL
-1; Air and CO
2after gas mixes in mixed air vessel 18, via gas mixture admission passage 8 and aeration plate 3, keep waste water ph 6.8 ~ 7.3 for micro algae growth supplementary carbon source.Micro-algae is mixed in a liquid.Ventilate during illumination cultivation, stuffiness during dark culturing, Light To Dark Ratio is 12:12, and intensity of illumination controls as 2400lx;
Eight, under the condition passing into mixed gas, cultured continuously is after 6 days, and algae liquid enters micro-algae ultrafiltration system through fluid pipeline, does follow-up algae water and is separated.
Nine, micro-algae ultrafiltration system is opened.Open relevant water outlet, water-in, open surge pump, regulate spinner-type flowmeter, the water inlet flux controlling ultra-filtration membrane is 100L/Hm
2, operating pressure is 0.20MPa; Clear liquid after ultrafiltration flow to returnable through clear liquid drainage 191, and the micro-algae concentrated solution after ultrafiltration is flowed out by the concentrated solution outlet 192 of micro-algae filtering unit, with the micro-algae concentrated solution of other container collection.
After photosynthetic bacterium process, Ultra filtration membrane photosynthetic bacterium and clear liquid, micro-algae process, the micro-algae of Ultra filtration membrane and clear liquid four-stage, through measuring, the COD in processed waste water is 268mg/L, TN concentration is 109mg/L, TP concentration 35mg/L; Namely COD clearance is that the clearance of 98.6%, TN and TP is respectively 89.6% and 70.1%; And the photosynthetic bacterium of output and microalgae dry weight are all higher than 4.5 times of initial inoculum; This technique have effectively achieved degraded and the waste water reclaiming of Pollutants in Wastewater.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model know-why; can also make some improvement and replacement, these improve and replace and also should be considered as protection domain of the present utility model.
Claims (6)
1. recycle an equipment for hydrothermal liquefaction waste water Middle nutrition element, it is characterized in that, comprise photosynthetic bacterium incubator, microdisk electrode device, photosynthetic bacterium filtering unit, micro-algae filtering unit, air admission unit;
Described photosynthetic bacterium incubator is provided with waste water inlet, and described photosynthetic bacterium incubator connects described photosynthetic bacterium filtering unit by pipeline, and described microdisk electrode device connects described micro-algae filtering unit by pipeline;
Described photosynthetic bacterium filtering unit is provided with ultra-filtration membrane, purified liquor outlet and concentrated solution outlet, and described purified liquor outlet connects described microdisk electrode device by pipeline; Described micro-algae filtering unit is provided with ultra-filtration membrane, clear liquid drainage and concentrated solution outlet;
Described air admission unit comprises air compressor, CO
2gas tank, mixed air vessel, air compressor and CO
2gas tank all connects described mixed air vessel by gas piping, and described mixed air vessel connects described microdisk electrode device by gas piping; Described air compressor connects photosynthetic bacterium incubator by gas piping.
2. equipment according to claim 1, is characterized in that, described photosynthetic bacterium incubator is cylindrical printing opacity plexiglass box, and be provided with aeration plate bottom described photosynthetic bacterium incubator, this aeration plate connects air compressor by gas piping.
3. equipment according to claim 1, is characterized in that, described microdisk electrode device is cylindrical printing opacity plexiglass box, and be provided with aeration plate bottom described microdisk electrode device, this aeration plate connects mixed air vessel by gas piping.
4., according to the arbitrary described equipment of claim 1-3, it is characterized in that, described ultra-filtration membrane is inner pressed hollow-fibre membrane.
5. according to the arbitrary described equipment of claim 1-3, it is characterized in that, the pipeline connecting described photosynthetic bacterium filtering unit is provided with surge pump, valve, tensimeter and spinner-type flowmeter.
6. according to the arbitrary described equipment of claim 1-3, it is characterized in that, the pipeline connecting described micro-algae filtering unit is provided with surge pump, valve, tensimeter and spinner-type flowmeter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217936A (en) * | 2018-03-01 | 2019-09-10 | 中国农业大学 | Utilize the biomembrane magnetic field device and method of photosynthetic organism processing sewage |
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- 2015-05-22 CN CN201520337562.5U patent/CN204661507U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110217936A (en) * | 2018-03-01 | 2019-09-10 | 中国农业大学 | Utilize the biomembrane magnetic field device and method of photosynthetic organism processing sewage |
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