CN108163965B - Fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin - Google Patents
Fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin Download PDFInfo
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- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000010865 sewage Substances 0.000 claims abstract description 42
- 239000000945 filler Substances 0.000 claims abstract description 23
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 16
- 239000010452 phosphate Substances 0.000 claims abstract description 8
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 7
- 239000002244 precipitate Substances 0.000 claims abstract description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 229910003460 diamond Inorganic materials 0.000 claims description 6
- 239000010432 diamond Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 24
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 8
- 239000001301 oxygen Substances 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 239000002351 wastewater Substances 0.000 abstract description 6
- 239000012528 membrane Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- 229910052698 phosphorus Inorganic materials 0.000 description 13
- 239000011574 phosphorus Substances 0.000 description 13
- 230000008569 process Effects 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 239000003814 drug Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 244000005700 microbiome Species 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000012851 eutrophication Methods 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011178 precast concrete Substances 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- 238000013268 sustained release Methods 0.000 description 2
- 239000012730 sustained-release form Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241000192710 Microcystis aeruginosa Species 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001410 inorganic ion Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001463 metal phosphate Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- DJFBJKSMACBYBD-UHFFFAOYSA-N phosphane;hydrate Chemical compound O.P DJFBJKSMACBYBD-UHFFFAOYSA-N 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
- C02F3/005—Combined electrochemical biological processes
-
- 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
- C02F3/28—Anaerobic digestion processes
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Engineering & Computer Science (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Molecular Biology (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention provides a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin, which comprises a buried cabin body; the cabin body is a hollow cylindrical enclosure wall structure with an open top; the fixed bed biomembrane pipes are vertically and tightly arranged in the cabin body; the fixed bed biological film tube is a hollow tubular structure; the wall of the fixed bed biological film tube is provided with a plurality of micropores; micro-electrolysis filler is placed in the fixed bed biomembrane tube; the micro-electrolysis slowly releases metal ions, and after phosphate in the sewage and the metal ions are combined to form a precipitate, the micro-electrolysis material consumes oxygen in the water body, so that the dissolved oxygen in the cabin is reduced, and the anaerobic denitrification is facilitated. The invention combines micro-electrolysis and a biological membrane structure to achieve slow release dephosphorization and denitrification treatment at the same time, has excellent effect on rural decentralized wastewater advanced treatment and effectively improves the effluent index; meanwhile, the slow release effect is excellent, the labor maintenance cost is saved, and the rural sewage treatment popularization and application are facilitated.
Description
Technical Field
The invention relates to water treatment, in particular to a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin.
Background
Domestic sewage often contains a large amount of phosphorus, and excessive propagation of algae can be caused by discharging the sewage into a water body, so that the water body is eutrophicated, and the water quality is deteriorated. In domestic sewage, 80% of phosphorus is excreted from human body, and the rest is from washing wastewater and food waste. Wherein the phosphorus-containing washing powder is a main source of domestic phosphorus-containing sewage. Phosphorus is a key nutrient that causes eutrophication of water. The eutrophication of the water body not only can lead algae in the water to overgrow, but also can lead the oxygen content of the water body to be rapidly reduced, and the survival of aquatic organisms such as fishes and the like is affected. The eutrophication of water body is represented as water bloom in lakes and reservoirs. In order to treat the above hazards, the content of phosphorus in the effluent of domestic sewage treatment must be reduced.
Along with the improvement of the environmental quality requirements of people, the requirements of sewage discharge on nitrogen, phosphorus and the like are gradually stricter. In contrast, phosphorus can be removed by chemical precipitation, while nitrogen degradation is mainly based on biological treatment, which requires a sewage treatment process unit to take denitrification into consideration.
The effluent standard of the urban sewage plant in China is a secondary emission standard before 2002, wherein only ammonia nitrogen (NH 3-N) index requirements exist, and no total nitrogen index requirements exist. At present, for the decentralized sewage treatment facilities for removing nitrogen in sewage at home and abroad, the advanced denitrification standard lifting transformation is generally adopted after the conventional secondary treatment, and the technology aims to break through the advanced denitrification standard lifting technology of decentralized sewage treatment equipment in rural areas and the like, implement standard lifting transformation of key engineering and complete the recycling degree of wastewater.
The annual domestic sewage quantity generated in rural areas is more than 90 hundred million tons, which becomes an important source of environmental pollution. The distributed pollution point sources such as rural domestic sewage and the like have wide range, scattered distribution, strong randomness, large water quality and water quantity change range and complex sewage components. The treatment process of most rural scattered domestic sewage treatment equipment adopts an anoxic-Aerobic (AO) process, so that on one hand, the biological dephosphorization effect is very small, and the yielding water phosphorus is difficult to reach the standard; in the prior art, the electrolytic dephosphorization process is adopted to ensure that the discharged phosphorus reaches the discharge standard, but the electrolytic dephosphorization process is suitable for small-sized equipment, the energy consumption above 5T/d treatment capacity is very high, the electrode plate loss is serious, and the electrolytic dephosphorization process is not suitable for being adopted; if the mode of adding medicine and removing phosphorus is adopted, the reaction efficiency of the medicine cannot be controlled, the release amount and the release time cannot be estimated, a medicine storage tank and a metering pump are additionally arranged, a worker needs to be additionally arranged for carrying out equipment maintenance and medicine preparation every day, and for the characteristics of wide rural distribution and long distance, the maintenance brings additional equipment cost and labor maintenance cost; on the other hand, in the traditional dosing process, the reaction is rapid but cannot last, manual or equipment is needed for continuous dosing, the method cannot be suitable for rural distributed small-sized sewage treatment systems, and indexes such as suspended matters, total phosphorus, floating oil, chromaticity and the like cannot stably reach national water treatment standards and cannot realize advanced water quality treatment; if the sewage treatment system adopting the reverse osmosis membrane structure has good treatment effect, but has high construction cost, the rural distributed small-sized sewage treatment system has low treatment capacity, adopts an underground structure, and is mainly provided with a precast concrete tank body, a glass fiber reinforced plastic tank and a carbon steel tank in China at present; the precast concrete tank body is unsuitable for rural sewage treatment because of the defects of long construction period, poor corrosion resistance, easy pollution to water body due to leakage; the glass fiber reinforced plastic tank has poor rigidity, variability, poor long-term temperature resistance and low ageing resistance, and the manufacturing process is not environment-friendly, so that secondary environmental pollution is caused and the health of a human body is dangerous; the carbon steel tank cannot meet the structural requirements of rural domestic sewage buried equipment due to low strength and poor corrosion resistance; there is an urgent need for a new type of deep dephosphorization and denitrification equipment or technology suitable for rural areas.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin, which combines micro-electrolysis with a biological film structure to achieve slow release dephosphorization and denitrification treatment at the same time, has excellent deep treatment effect on rural distributed sewage and effectively improves the effluent index.
The invention provides a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin, which comprises a cabin body; the cabin body is of a hollow cylindrical surrounding wall structure with an open top; the side surface of the top of the cabin body is provided with a water inlet and a water outlet respectively; the water inlet is led to the fixed bed biological film pipes through a water inlet pipeline, and a plurality of fixed bed biological film pipes are vertically and tightly arranged in the cabin body; the fixed bed biological film tube is of a hollow tubular structure; the fixed bed biological film tube wall is provided with a plurality of micropores; a micro-electrolysis filler is placed in the fixed bed biomembrane tube; the metal ions are slowly released by micro-electrolysis, and the phosphate in the sewage is discharged from the water outlet after being combined with the metal ions to form a precipitate.
Further, the bottom of the cabin body is also provided with a stirring device.
Further, an overflow port is formed in the top of the water inlet pipeline.
Further, a tank body of the cabin body is provided with a reinforcing rib; the reinforcing ribs are uniformly distributed on the tank body.
Further, at least two hoisting protruding blocks are further arranged on the tank body of the cabin body.
Further, the fixed bed biofilm tubes adjacent to each other at intervals and with the micro-electrolysis filler placed therein form a slow release channel.
Further, the width of the slow release channel is the pipe diameter of a single fixed bed biological film pipe.
Further, the width of the slow release channel is the pipe diameter of the two fixed bed biological film pipes.
Further, the axis of the water inlet is not collinear with the axis of the water outlet.
Further, the shape of the micropores is diamond.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin, which comprises a buried cabin body; the cabin body is a hollow cylindrical enclosure wall structure with an open top; the side surface of the top of the cabin body is provided with a water inlet and a water outlet respectively; the water inlet is led to the fixed bed biomembrane pipes through a water inlet pipeline, and a plurality of fixed bed biomembrane pipes are vertically and tightly arranged in the cabin body; the fixed bed biological film tube is a hollow tubular structure; the wall of the fixed bed biological film tube is provided with a plurality of micropores; micro-electrolysis filler is placed in the fixed bed biomembrane tube; the micro-electrolysis slowly releases metal ions, and the crystal lattice of the micropores is of a net-shaped diamond shape, so that the micro-electrolysis is large in occupied area and good in water flow passing performance; when the micro-electrolysis filler is consumed, only the orifice of the fixed bed biological film tube is needed to be supplemented with micro-electrolysis material; the surface of the pipe wall is specially treated, so that microorganism mounting is facilitated (oxygen in a water body is consumed in the reaction process of the micro-electrolysis material, the dissolved oxygen of the whole cabin is lower than 0.5mg/L, anoxic denitrification is facilitated), and the denitrification effect is good; the phosphate in the sewage is combined with the metal ions to form a precipitate, and then the precipitate is discharged from the water outlet. The invention combines micro-electrolysis and a biological membrane structure to achieve slow release dephosphorization and denitrification treatment at the same time, has excellent effect on rural decentralized wastewater advanced treatment and effectively improves the effluent index; meanwhile, the slow release effect is excellent, the labor maintenance cost is saved, and the rural sewage treatment popularization and application are facilitated.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings. Specific embodiments of the present invention are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a schematic diagram of a fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin structure;
FIG. 2 is a side view of a fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin of the invention;
FIG. 3 is a cross-sectional view B-B of FIG. 2;
FIG. 4 is a schematic diagram of the internal structure of a fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin;
FIG. 5 is a schematic diagram of a sustained release channel of the present invention;
FIG. 6 is a schematic diagram of a second sustained release channel of the present invention;
FIG. 7 is a partial schematic view of the wall of a fixed bed biofilm tube of the present invention.
In the figure: cabin body 1, jar body 2, strengthening rib 21, hoist and mount lug 22, hatch 23, water inlet 3, delivery port 4, inlet channel 5, overflow port 51, fixed bed biomembrane pipe 6, micropore 61, agitating unit 7, support 8, pressure pipe 9.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
A fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin is shown in figures 1-4, and comprises a cabin body 1; the cabin body 1 is a hollow cylindrical enclosure wall structure with an open top; the side surface of the top of the cabin body 1 is respectively provided with a water inlet 3 and a water outlet 4; the water inlet is led to the fixed bed biomembrane pipes 6 through the water inlet pipeline 5, and a plurality of fixed bed biomembrane pipes 6 are vertically and tightly arranged in the cabin body 1; the fixed bed biological film tube 6 is of a hollow tubular structure; the wall of the fixed bed biomembrane tube 6 is provided with a plurality of micropores 61; the micro-electrolysis filler is placed in the fixed bed biomembrane tube 6; the micro-electrolysis slowly releases metal ions, and phosphate in the sewage is combined with the metal ions to form precipitate and then discharged from the water outlet 4. In order to install and fix the fixed bed biomembrane tube 6, the fixed bed biomembrane tube 6 is laterally fixed through a bracket 8 and limited at the top through a pressing tube 9.
In one embodiment, as shown in FIG. 7, the shape of the micropores 61 is diamond, which is the specific surface area of the fixed bed biofilm tube 6. The diameter of the inscribed circle of the micropore 61 is 20mm-100mm, wherein the effect that the diameter of the inscribed circle of the micropore 61 is 40mm-70mm is better, and in practical experimental application, the diameter of the inscribed circle of the micropore 61 is 40mm or 55mm or 70mm; the spacing between the diamond edges of two adjacent micropores 61 is 8mm-10mm, the effect is best after the microorganism is coated, and the demolding after the microorganism dies is easy.
The micro-electrolysis technology of the micro-electrolysis filler is an ideal technology for treating high-concentration organic sewage at present, and the micro-electrolysis filler is used for carrying out electrolysis treatment on the sewage by utilizing the potential difference of 1.2V generated by the micro-electrolysis material filled in the sewage under the condition of no power supply so as to achieve the aim of degrading organic pollutants.
Currently, the microelectrode most commonly used in the microelectrolysis technology is an iron-carbon microelectrode, and the electrolytic reaction is as follows: in the hydrogen evolution corrosion process, iron is used as an anode, and the reaction equation is as follows: fe-2e - →Fe 2+ Carbon is the cathode, and the reaction equation is: 2H+2e - →2[H]→H 2 The method comprises the steps of carrying out a first treatment on the surface of the Under the aerobic condition, the iron in the iron-carbon microelectrode can be subjected to oxygen absorption corrosion, and the reaction process is as follows: 2Fe 2+ +O 2 +4H + →2H 2 O+Fe 3 + ，O 2 +4H + +4e - →2H 2 O，O 2 +2H 2 O+4e - →4OH - 。
The reaction process shows that the electrode reaction of the microelectrode can generate a large amount of metal ions, the metal ions can react with inorganic ions such as phosphate radical, sulfate radical and the like to remove the soluble phosphate radical, and can reduce part of toxic metal ions to achieve the effect of detoxification, so that the sewage can be treated. In this embodiment, the micro-electrolysis filler is made into a spherical structure and filled in the fixed bed biomembrane tube 6, and as shown in fig. 7, the micro-electrolysis filler contacts with sewage through the micropores 61 to slowly release metal ions, thereby achieving the slow release effect of the medicament. Simultaneously effectively improving indexes such as suspended matters, total phosphorus, floating oil, chromaticity and the like of the treated effluent. When the micro-electrolysis filler is ablated along with the water treatment process, the filler is manually added for supplementation, the supplementation interval is at least one year, the fixed-point timing treatment is not required by the professional hands, and the requirement of rural decentralized water treatment maintenance is met.
In one embodiment, as shown in fig. 3 and 4, in order to accelerate the reaction efficiency and homogenize the sewage, the bottom of the tank body 1 is further provided with a stirring device 7.
In one embodiment, as shown in fig. 4, in order to prevent the sewage from being excessively large instantaneously, an overflow port 51 is formed at the top of the water inlet pipe 5, and when the water amount of the water inlet 3 is excessively large, excessive sewage flows into the cabin body 1 from the overflow port 51.
Generally, the cabin body 1 is made of polyethylene, is corrosion-resistant, durable, high in structural strength and not easy to damage to cause secondary pollution; in one embodiment, as shown in fig. 2, the reinforcing ribs 21 are uniformly distributed at intervals, so that the vertical stress is uniform, and the contact area between the buried reinforcing ribs and soil is increased, so that the reinforcing ribs are not easy to shift. Specifically, because the whole weight of the cabin body 1 is heavy, in order to facilitate the installation of the cabin body 1, at least two hoisting protrusions 22 are further arranged on the tank body 2 of the cabin body 1, and the cabin body 1 is placed under the ground which is built in advance through the cooperation of the hoisting device and the hoisting device. As shown in fig. 2, the hatch 23 of the cabin body 1 is fixedly connected to a manhole cover assembly (not shown) by means of a connector, wherein the manhole cover assembly is exposed to the ground and the cabin body 1 is placed under the ground.
To create an environment for rapid and efficient reaction of the wastewater, fixed bed biofilm tubes 6 adjacent to each other and containing the microelectrolysis packing are spaced apart to form slow release channels. The sewage to be treated passes through the slow release channel, the fixed bed biological film tube 6 with the micro-electrolysis filler is placed as the channel wall of the slow release channel, and the fixed bed biological film tube 6 without the micro-electrolysis filler is placed as the channel of the slow release channel. In one embodiment, as shown in fig. 5, the width of the slow release channel is the pipe diameter of a single fixed bed biological film pipe 6; in another embodiment, as shown in fig. 6, the width of the slow release channel is the pipe diameter of the double fixed bed biological film pipes 6; wherein the shaded part is a fixed bed biological film tube 6 with micro-electrolysis filler, and the blank part is a fixed bed biological film tube 6 without micro-electrolysis filler. It should be understood that the number of the slow release channels in the cabin body 1 can be the only channel or a plurality of same direction channels, and the process of directing the water inlet 3 to the water outlet 4 is completed together. Specifically, in order to improve the water treatment effect, the axis of the water inlet 3 is not collinear with the axis of the water outlet 4, so that direct convection cannot be formed after sewage enters water, and the sewage to be treated is prevented from directly flowing to the water outlet 4 without passing through a slow release channel, in one embodiment, in order to improve the reaction efficiency and ensure sufficient reaction, as shown in fig. 3, the stirring device 7 is installed at the central position of the cabin body 1, the included angle between the plane formed by the axis of the water inlet pipe 5 and the central axis of the cabin body 1 and the vertical plane of the rotation shaft of the stirring device 7 is 25 ° -35 °, and the positions of the water outlet 4 and the water inlet 3 are central symmetrical with respect to the central axis of the cabin body 1.
In particular, the pipe diameter of the fixed bed biofilm pipe 6 determines the pipe porosity, which determines the stirring effect, which determines the removal rate and capacity; on one hand, the pipe diameter determines the quantity of the stacked micro-electrolysis materials in the same volume to finally influence the treatment dephosphorization effect, and the larger the pipe diameter is, the larger the quantity of the stacked micro-electrolysis fillers is, and the better the treatment effect is; on the other hand, the specific surface area of the fixed bed biofilm tube 6 is determined, so that the quantity of microorganisms mounted is finally influenced, the denitrification effect is influenced, the larger the tube diameter is, the smaller the specific surface area is, the smaller the microorganism quantity is, the denitrification effect is poor, but at the same time, the smaller the tube diameter is, the inside of the tube is more easily blocked, and the film forming effect is also influenced. Wherein, the pipe diameter (diameter value) of the fixed bed biological film pipe 6 is [2.5,8] cm, and the following table shows that, preferably, when the pipe diameter of the fixed bed biological film pipe 6 is 5.5cm, the comprehensive effect of denitrification and dephosphorization is optimal, and the rural decentralized water treatment requirement is met.
After the slow release channel formed by the fixed bed biomembrane tube 6, the phosphorus concentration in the sewage reaches the national first-grade A standard, the denitrification effect is better, and the method is different from the traditional dosing aeration method by combining micro-electrolysis and film hanging, the acid-base property is not required to be adjusted, meanwhile, a non-aeration structure is adopted, the medicament is slowly released, the whole service life of the medicament is long, and the treatment requirement of rural decentralized water treatment is fully met.
The crystal lattice of the micropores is a reticular diamond hole, the occupied area is relatively large, and the water flow passing property is good; when the micro-electrolysis filler is consumed, only the orifice of the fixed bed biological film tube is needed to be supplemented with micro-electrolysis material; the surface of the pipe wall is specially treated, so that microorganism mounting is facilitated, the oxygen in the water body is consumed in the reaction process of the micro-electrolysis material, the dissolved oxygen in the whole cabin is lower than 0.5mg/L, the anoxic denitrification of denitrifying bacteria is facilitated, and the denitrification effect is good.
The invention provides a fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin, which comprises a cabin body; the cabin body is a hollow cylindrical enclosure wall structure with an open top; the side surface of the top of the cabin body is provided with a water inlet and a water outlet respectively; the water inlet is led to the fixed bed biomembrane pipes through a water inlet pipeline, and a plurality of fixed bed biomembrane pipes are vertically and tightly arranged in the cabin body; the fixed bed biological film tube is a hollow tubular structure; the wall of the fixed bed biological film tube is provided with a plurality of micropores; micro-electrolysis filler is placed in the fixed bed biomembrane tube; the metal ions are slowly released by micro-electrolysis, and the phosphate in the sewage is combined with the metal ions to form a precipitate and then discharged from the water outlet. The invention combines micro-electrolysis and a biological membrane structure to achieve slow release dephosphorization and denitrification treatment at the same time, has excellent effect on rural decentralized wastewater advanced treatment and effectively improves the effluent index; meanwhile, the slow release effect is excellent, the labor maintenance cost is saved, and the rural sewage treatment popularization and application are facilitated.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can smoothly practice the invention as shown in the drawings and described above; however, those skilled in the art will appreciate that many modifications, adaptations, and variations of the present invention are possible in light of the above teachings without departing from the scope of the invention; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the scope of the present invention.
Claims (10)
1. A fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin is characterized in that: comprises a cabin body; the cabin body is of a hollow cylindrical surrounding wall structure with an open top; the side surface of the top of the cabin body is provided with a water inlet and a water outlet respectively; the water inlet is led to the fixed bed biological film pipes through a water inlet pipeline, and a plurality of fixed bed biological film pipes are vertically and tightly arranged in the cabin body; the fixed bed biological film tube is of a hollow tubular structure; the fixed bed biological film tube wall is provided with a plurality of micropores; a micro-electrolysis filler is placed in the fixed bed biomembrane tube; the metal ions are slowly released by micro-electrolysis, and phosphate in the sewage is combined with the metal ions to form a precipitate and then discharged from the water outlet; the fixed bed biomembrane pipe with the micro-electrolysis filler is used as the channel wall of the slow release channel, and the fixed bed biomembrane pipe without the micro-electrolysis filler is used as the channel of the slow release channel.
2. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 1, wherein the cabin is characterized in that: and a stirring device is further arranged at the bottom of the cabin body.
3. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 1, wherein the cabin is characterized in that: and an overflow port is formed in the top of the water inlet pipeline.
4. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 1, wherein the cabin is characterized in that: the tank body of the cabin body is provided with a reinforcing rib; the reinforcing ribs are uniformly distributed on the tank body.
5. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 1, wherein the cabin is characterized in that: at least two hoisting protruding blocks are further arranged on the tank body of the cabin body.
6. A fixed bed biofilm contained micro-electrolysis deep denitrification and dephosphorization compartment according to any one of claims 1 to 5, wherein: and forming a slow-release channel by spacing adjacent fixed bed biomembrane pipes with the micro-electrolysis filler.
7. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 6, wherein the cabin is characterized in that: the width of the slow release channel is the pipe diameter of a single fixed bed biological film pipe.
8. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 6, wherein the cabin is characterized in that: the width of the slow release channel is the pipe diameter of the two fixed bed biological film pipes.
9. A fixed bed biofilm containment type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 7 or 8, wherein: the axis of the water inlet is not collinear with the axis of the water outlet.
10. The fixed bed biological film containing type micro-electrolysis deep denitrification and dephosphorization cabin as claimed in claim 9, wherein the cabin is characterized in that: the shape of the micropores is diamond.
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| CN108163965B (en) * | 2018-02-07 | 2024-03-08 | 优德太湖水务（苏州）有限公司 | Fixed bed biological film contained micro-electrolysis deep denitrification and dephosphorization cabin |
| CN108218133B (en) * | 2018-02-07 | 2024-03-12 | 优德太湖水务（苏州）有限公司 | Deep dephosphorization microsystem |
| CN110227284A (en) * | 2019-05-31 | 2019-09-13 | 优德太湖水务（苏州）有限公司 | A kind of rural sewage treatment sedimentation basin |
| CN110228848A (en) * | 2019-05-31 | 2019-09-13 | 优德太湖水务（苏州）有限公司 | The buried anoxic cabin of sewage treatment |
| CN110194528A (en) * | 2019-05-31 | 2019-09-03 | 优德太湖水务（苏州）有限公司 | Rural sewage treatment anoxic cabin |
| CN110204111A (en) * | 2019-05-31 | 2019-09-06 | 优德太湖水务（苏州）有限公司 | A kind of dephosphorization system for sewage treatment |
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