Biomembrance process denitrification dephosphorization electrogenesis device
Technical field
The invention belongs to technical field of sewage, particularly relate to a kind of biomembrance process denitrification dephosphorization electrogenesis device, in the pollutant such as COD in disposing of sewage, nitrogen, phosphorus, produce the new technology of electric energy.
Background technology
Conventional denitrification dephosphorization process is mainly made up of anaerobism, aerobic, anoxic reacter, is divided into single mud technique and two sludge system. In single mud technique, nitrobacteria and Denitrifying Phosphate Accumulating Organisms are present in same reactor, experiencing successively anaerobism, anoxic, aerobic three kinds of running environment, but in two sludge system, nitrobacteria and denitrifying bacteria are present in independent reactor separately, they can be growing in optimum operation environment separately, and can solve better the competition contradiction of nitrifier and polyP bacteria in traditional handicraft. The two bricklayer's's skills of denitrification dephosphorization are not only conducive to solve in traditional biological dephosphorization and denitrification process makes the relatively poor problem for the treatment of effect because carbon source in municipal sewage is not enough, and can reduce sludge yield, reduce sludge treatment expense, reduce structures quantity and volume required, save oxygen-supplying amount, reduce power consumption. Such as, but denitrifying phosphorus removal technique, processing in the process of sanitary sewage, has been tamed ripe microorganism and also do not performed to due effect aspect a lot, contains a large amount of chemical energy etc. in microorganism, has caused certain wasting of resources. Microbiological fuel cell is the organic matter utilizing in the catalytic action degradation of sewage of microorganism, chemical energy is converted into the novel reactor of electric energy, but to reducing the pollutant such as nitrogen, phosphorus in sewage without obvious removal effect. There is the problems such as sludge settling difficulty and easy loss in Sewage Plant traditional activated sludge process. The biomembrane facture of sewage is a kind of sewage aerobic biologic treating technique arranged side by side with activated sludge process, is a kind of method of wastewater treatment efficiently. Biomembrane refer to all by certain medium adhere to, fixing biologically active bodies and material. Biomembrane adhere to fixation procedure in all need certain medium to bear and complete fixing, this medium is called biofilm carrier, also referred to as carrier filler. Filler is the biomembrane place of perching of relying, and is biomembranous carrier, also has the effect of holding back suspension simultaneously. Biomembrance process has sludge quantity variation few, that can not produce sludge bulking, water quality and quantity to waste water and has the advantages such as good adaptive capacity, operational management be simple. About the research of biomembrane denitrification dephosphorization and microbiological fuel cell coupling also belongs to blank field at home and abroad, after coupling device successful operation, in disposing of sewage, produce stable electric energy, not only there is very high theory and using value, also for the development and application of Denitrifying Phosphorus Removal Technology in the sewage disposal of actual cities provides technical support, for the Technology design in Practical Project provides certain reference, further improve denitrification nitrogen and phosphorus removal technical system.
Summary of the invention
For the technical problem of above-mentioned existence, in order to overcome the waste that causes a large amount of organic energy in the process of disposing of sewage, the deficiency producing without renewable green energy resource, the invention provides a kind of biomembrance process denitrification dephosphorization electrogenesis device, wherein denitrifying phosphorus removal technique is that anaerobic reactor, aerobic biofilm reactor and the anoxic reacter moving joined together, the common two mud systems that form. This device not only can reduce the concentration of COD in sewage, TN and TP and purify waste water, and can utilize the catalytic action of microorganism to produce electric energy.
The object of the invention is to be achieved through the following technical solutions:
A kind of biomembrance process denitrification dephosphorization of the present invention electrogenesis device, comprise the water tank connecting successively, anaerobic pond, preliminary sedimentation tank, Aerobic Pond, anoxic pond and final deposition pool, between anaerobic pond and Aerobic Pond, separated by amberplex, wherein anaerobic pond is as the anode chamber of microbiological fuel cell, Aerobic Pond is as the cathode chamber of microbiological fuel cell, anode chamber and cathode chamber be outer meeting resistance case respectively, form closed-loop path, between preliminary sedimentation tank and anoxic pond, surmounting pipeline by mud is connected, between final deposition pool and anaerobic pond, be connected by sludge reflux pipeline, on final deposition pool, be also provided with delivery port and mud discharging mouth, in disposing of sewage, produce electric energy, realize the coupling of denitrification dephosphorization and microbiological fuel cell technique.
Further, described anaerobic pond and Aerobic Pond are respectively by being enriched with electrode and the wire outer meeting resistance case of a large amount of microorganisms.
Further, described anaerobic pond and anoxic pond are all established top cover, inside establish agitating device.
Further, described Aerobic Pond is biofilm reactor, fills filler in pond, is provided with aeration sand head at the bottom of pond, and aeration sand head connects air compressor outward.
Further, the inlet pipeline of described water tank, mud surmount with sludge reflux pipeline on be all connected with pump.
Further, the bottom of described anaerobic pond, preliminary sedimentation tank, Aerobic Pond, anoxic pond and final deposition pool is funnel-form, and outlet at bottom is equipped with draining valve.
Beneficial effect of the present invention is:
The present invention utilizes the coupling technique of two mud system process and microbiological fuel cell to process sanitary sewage, can in reducing COD, TP in sewage and TN concentration, produce stable magnitude of voltage, both effectively process the pollutant in sewage, produced again clean electric energy.
Brief description of the drawings
Fig. 1 is process chart of the present invention.
Fig. 2 is technology arrangement figure of the present invention.
Fig. 3 is electrogenesis part schematic diagram of structure of the present invention.
In figure: 1. water tank, 2. anaerobic pond, 3. preliminary sedimentation tank, 4. Aerobic Pond, 5. anoxic pond, 6. final deposition pool, 7. amberplex, 8. mud surmounts pipeline, 9. delivery port, 10. mud discharging mouth, 11. sludge reflux pipelines, 12. resistance boxes, 13. universal meters, 14. carbon felts.
Detailed description of the invention
Describe the present invention below in conjunction with drawings and Examples.
Embodiment: as shown in Figure 1-Figure 3, the present invention includes the water tank inlet 1 connecting successively, anaerobic pond 2, preliminary sedimentation tank 3, Aerobic Pond 4, anoxic pond 5 and final deposition pool 6, between anaerobic pond 2 and Aerobic Pond 4, separated by amberplex 7, wherein anaerobic pond 2 is as the anode chamber of microbiological fuel cell, Aerobic Pond 4 is as the cathode chamber of microbiological fuel cell, anode chamber and cathode chamber are respectively by carbon felt electrode 14 and copper conductor outer meeting resistance case 12, form closed-loop path, between preliminary sedimentation tank 3 and anoxic pond 5, surmounting pipeline 8 by mud is connected, between final deposition pool 6 and anaerobic pond 2, be connected by sludge reflux pipeline 11, on final deposition pool 6, be also provided with delivery port 9 and mud discharging mouth 10, in disposing of sewage, produce electric energy, realize the coupling of denitrification dephosphorization and two kinds of techniques of microbiological fuel cell.
The inlet pipeline of described water tank 1, mud surmount on pipeline 8 and sludge reflux pipeline 11 and are all connected with pump; Anaerobic pond 2 and anoxic pond 5 are all established top cover, and inside is equipped with agitator, thereby are stirred muddy water is mixed by agitator; Filler (floating type, all types of fillers such as fixed all can) is housed in Aerobic Pond 4, for biomembrane provides the place of relying and perching, in Aerobic Pond 4, also establishes aerator. The bottom of described anaerobic pond 2, anoxic pond 5, Aerobic Pond 4, preliminary sedimentation tank 3 and final deposition pool 6 is funnel-form, and outlet at bottom is equipped with draining valve.
The present invention, in the process of disposing of sewage, utilizes biomembrane denitrifying phosphorus removal technique to reduce the concentration of COD, TN and TP in sewage, purifies waste water; Anode chamber using anaerobic pond 2 as microbiological fuel cell, Aerobic Pond 4 is as the cathode chamber of microbiological fuel cell, centre is separated by amberplex 7, anode chamber and cathode chamber are respectively by being enriched with carbon felt 14 electrodes and the copper conductor outer meeting resistance case 12 of a large amount of microorganisms, form closed-loop path, the continuous flow double sludge technique combining taking anaerobic reactor, aerobic biofilm reactor and anoxic reacter is basis, in disposing of sewage, produce certain electric energy, realize the coupling of denitrification dephosphorization and two kinds of techniques of microbiological fuel cell. The present invention is at run duration, in sewage, the index of COD, ammonia nitrogen and total phosphorus is respectively 300mg/L, 50mg/L and 10mg/L left and right, the dissolved oxygen concentration of controlling anaerobic pond 2, anoxic pond 5 and Aerobic Pond 4 is respectively 0.2mg/L, 0.5mg/L and 3.5-5.0mg/L, the water temperature of anaerobic pond 2 and anoxic pond 5 is controlled at 25 DEG C, and the water temperature of Aerobic Pond 4 is controlled at 25~30 DEG C. The sludge concentration of anaerobic pond 2 and anoxic pond 5 is controlled at 5000mg/L left and right, and the biomass control of Aerobic Pond 4 is at 6500mg/L. First sanitary sewage is delivered to anaerobic pond (anode chamber) 2 mixes with returned sludge, under the effect of amphimicrobian zymogenous bacteria, the larger molecular organics of part easily biological-degradable is converted into micromolecular volatile fatty acid (VFA), Denitrifying Phosphate Accumulating Organisms absorbs the synthetic PHB of these little molecule volatile fatty acids and is stored in cell, poly-phosphorus in cell is hydrolyzed into orthophosphates simultaneously, is discharged in water and (shows as the release of phosphorus); Simultaneously, organic matter decomposes and discharges electronics and proton under electrogenesis microbial action, electronics is delivered to negative electrode by external circuit and forms electric current, and proton is delivered to negative electrode by amberplex 7, oxygen in cathode chamber is as electron acceptor, receive the electronics that microorganism is transmitted from anode, self be also reduced into water simultaneously. The sewage that enters Aerobic Pond (cathode chamber) 4 through preliminary sedimentation tank, under the effect of nitrifier, is nitrate nitrogen by the mineralized nitrogen in sewage. In the time there is nitration reaction in MFC negative electrode, nitrifier and electrogenesis bacterium are competed to dissolved oxygen simultaneously, for reducing this competition, control the dissolved oxygen of Aerobic Pond 4 at 3.5~5mg/L. The sewage that contains nitrate nitrogen enters anoxic pond 5 from Aerobic Pond 4, carry out denitrification denitrogenation with the mud mixing that surmounts from preliminary sedimentation tank 3, now organic concentration is very low, Denitrifying Phosphate Accumulating Organisms is mainly that the PHB by storing in decomposer obtains energy for self growth and breeding, excess absorbs the dissolved phosphorus in water simultaneously, form with Quadrafos stores in vivo (excess that shows as phosphorus absorbs), precipitate through final deposition pool 6, a phosphorous high mud part is back to anaerobic pond 2 and carries out next circulation, a part is discharged this device, reaches the effect of dephosphorization. Device needs COD, the TN in continuous detecting course of reaction, change in concentration and the electrogenesis situation of TP at startup run duration.
As shown in Figure 2, device global shape is rectangle, and in device, the bottom of each reactor is funnel-form, is provided with draining valve. Device is in startup running, water inlet, mud surmount with sludge reflux employing pump to be carried, all the other current all turn round by gravity current, pass through successively anaerobic pond (anode chamber) 2, preliminary sedimentation tank 3, Aerobic Pond (cathode chamber) 4, anoxic pond 5, final deposition pool 6, sewage is carried out to purified treatment.
Fig. 3 is the electrogenesis part schematic diagram of structure of apparatus of the present invention, anode chamber's (anaerobic pond) 2 is spatially adjacent with cathode chamber (Aerobic Pond) 4, centre is separated by amberplex 7, cathode and anode electrode used therein material is the carbon felt 14 that is enriched with a large amount of microorganisms, connected by copper conductor, outer meeting resistance case 12, resistance box two termination voltmeters carry out the mensuration of magnitude of voltage.