CN202808537U - Town sewage deep treatment system - Google Patents
Town sewage deep treatment system Download PDFInfo
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- CN202808537U CN202808537U CN 201220421518 CN201220421518U CN202808537U CN 202808537 U CN202808537 U CN 202808537U CN 201220421518 CN201220421518 CN 201220421518 CN 201220421518 U CN201220421518 U CN 201220421518U CN 202808537 U CN202808537 U CN 202808537U
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- 239000010865 sewage Substances 0.000 title claims abstract description 116
- 239000010802 sludge Substances 0.000 claims abstract description 27
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 27
- 239000003463 adsorbent Substances 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 10
- 230000000249 desinfective Effects 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 22
- 241000216843 Ursus arctos horribilis Species 0.000 claims description 21
- 229910000460 iron oxide Inorganic materials 0.000 claims description 16
- 230000001954 sterilising Effects 0.000 claims description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N Iron(III) oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 11
- 239000000969 carrier Substances 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 230000001376 precipitating Effects 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- 239000003957 anion exchange resin Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000003245 coal Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 9
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract description 9
- 239000001301 oxygen Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- -1 ferric oxide hydrate compound Chemical class 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 60
- 238000000034 method Methods 0.000 description 22
- 238000004065 wastewater treatment Methods 0.000 description 7
- 241000276438 Gadus morhua Species 0.000 description 6
- 230000035507 absorption Effects 0.000 description 6
- 235000019516 cod Nutrition 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000009313 farming Methods 0.000 description 4
- 239000010954 inorganic particle Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005429 turbidity Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000003643 water by type Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 230000001112 coagulant Effects 0.000 description 1
- 230000001808 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000004059 degradation Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 235000008935 nutritious Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001131 transforming Effects 0.000 description 1
Abstract
The utility model discloses a town sewage deep treatment system and aims at solving the problems that the treated sewage can not meet the national standard in the prior art, a flow is long, occupying area is large and operating cost is high. The town sewage deep treatment system comprises a grid sewage treatment device, a grit chamber, an oxygen deficiency tank, an MBR (membrane biological reactor) aerobic tank, an adsorption filter tank and a disinfection tank which are sequentially communicated, wherein a nano ferric oxide hydrate compound adsorbent is filled inside the adsorption filter tank, and a sludge outlet used for discharging sludge is arranged at the bottom of the MBR aerobic tank. The town sewage deep treatment system disclosed by the utility model has the advantages of short flow, low cost, low operating cost, high stability and good sewage treatment effect.
Description
Technical field
The utility model relates to a kind for the treatment of system of town sewage, relates in particular to a kind of advanced treatment system of town sewage.
Background technology
Along with continuous growth and the economic develop rapidly of China's population, water consumption and water displacement increase year by year, and limited water resources is constantly contaminated, and water environment situation constantly worsens.Simultaneously, China large amount of sewage treatment plant built up in " 95 ", Tenth Five-Year Plan Period, and emission standard is relatively low, can not satisfy the requirement of overall control.Propose for the first time in State Environmental Protection Administration's environment-development [2005] No. 110 " about the notices of strict implement " urban wastewater treatment firm pollutant emission standard " "; " for preventing the waters eutrophication occurs; the water outlet of town domestic sewage treatment plant enters country and economizes the major river valley determined and lake, reservoir etc. are closed, during semiclosed waters, should carry out the A standard of primary standard in " standard " ".2006 No. 21 bulletin proposes to have reiterated this problem, this in fact on the rules aspect with GB18918-2002 in the scope of application of primary standard A standard directly expand most urban wastewater treatment firms to, the transformation of the Sewage treatment systems of urban wastewater treatment firm one-level A standard will be implemented in a large number in many basins and provinces and cities.Although China's gross amount of water resources is larger in addition, occupy the world the 6th, because populous, water resources ownership per capita only has 1/4th of the world, China's water resources also exists skewness simultaneously, and so the few phenomenon in many north, south is very deficient country of water resources of China.And effluent cycle recycling can be saved a large amount of fresh waters, the deficiency of make up water resource, and town sewage has on the spot desirable, reliable and stable, fraction advantages of higher, and the deficiency of alleviating China's water resources is had important meaning.Therefore, it is extremely urgent developing a kind of technique that is applicable to town sewage advanced treatment and regeneration.
At present China's municipal sewage treatment is widely used to be that the two stage biological treatment process comprises: traditional activated sludge process, time delay aeration activated sludge method, SBR (Sequencing Batch Reactor Activated Sludge Process) sequencing batch active sludge, AB, UNITANK and oxidation ditch process, A/O and A
2After treatment water outlet of/O etc., sewage generally can reach GB18918-2002 one-level B standard.In order further to improve treatment effect, make its water outlet reach one-level A standard and reuse standard, often carry out advanced treatment at tertiary treatment process such as subsequent coupling coagulating sedimentation, filtration, charcoal absorptions.But this town sewage advanced treatment process has long flow path, and investment is high, the shortcomings such as running cost height, poor stability.
MBR claims again membrane bioreactor, is a kind of new type water treatment technology that is combined by film processing unit and biological processing unit, and it integrates biological degradation, precipitation, filtration, has reduced the demand of equipment, is being subject to attention gradually at present.MBR has the characteristics such as stable effluent quality, processing power is high, technical process is short, floor space is little, operational management is convenient, and it is to COD, NH
3The removal effect of-N and SS suspended substance is significantly better than traditional two stage biological technique.But MBR generally has very long sludge age, like this so that phosphoric acid salt long-term enrichment in system causes system relatively poor to the removal effect of phosphorus.From the operation result of most of MBR, the concentration of water outlet phosphorus is unsatisfactory, be difficult to be down to below the 1mg/L, thereby serious restriction the application of this technique in advanced treatment of wastewater and reuse field.
Absorption method is considered to process that phosphorus pollutes the most one of effective means in the water body.The result of study of recent two decades shows that hydrous iron oxide has higher specific surface area and density of surface hydroxyl, phosphorus is had the Selective adsorption of height, and can realize regeneration and Reusability by regulating pH.This iron oxide particle size is superfine, if directly be used in the adsorption filter, can produce the higher pressure-losses, and causes the adsorption system can't steady running.At present, in order to solve this engineering roadblock, how in porous macrobead carrier, be prepared into compound adsorbent with hydrous iron oxide is immobilized.
Comprehensive as can be known above-mentioned, there is following problem in the at present processing of town sewage:
1: there is contradiction anxious to be resolved in the poor effect that town sewage processing urgent need reaches country-level A standard and the processing of existing town sewage;
2: existing town sewage treatment system and method existence process and the technical process of reuse is long, investment is high, running cost is high and poor stability.
The utility model content
For overcoming the problems referred to above, the utility model provides that a kind of flow process is short, cost is low, working cost is low and stable high town sewage treatment system.
For reaching above-mentioned purpose, the utility model town sewage advanced treatment system comprises the settling pit in order to the grid waste disposal plant of removing suspended substance, precipitation inorganic particulate matter that is connected successively, carries out anoxic pond, MBR Aerobic Pond, adsorption filter and sterilization pool that denitrification denitrogenation is processed;
Wherein,
Described MBR Aerobic Pond bottom is provided with sludge outlet;
Be filled with the compound adsorbent of nano hydrated ferric oxide in the described adsorption filter, in order to further sewage is carried out dephosphorization treatment.
Further, described grid waste disposal plant comprises coarse grid sewage treating machine and thin grid sewage treating machine; Described coarse grid sewage treating machine grizzly bar gap is 20-30mm; Described thin grid sewage treating machine grizzly bar gap is 5-10mm.
Further, described settling pit is horizontal flow type grit chamber, cyclone-type sand precipitating pool or aeration type settling pit.
Further, described MBR Aerobic Pond comprises Flat MBR membrane element.
Further, the sludge outlet of described MBR Aerobic Pond also is connected with described anoxic pond by pipeline; Described pipeline in order to the part sludge reflux to the described anoxic pond, and reflux ratio is 30%-60%.
Further, described loaded with nano hydrous iron oxide comprises carrier, and described carrier is macroporous anion exchange resin, activated carbon, diatomite or coal powder.
Further, described adsorption filter also comprises one in order to input the input tube that proportion is the aqueous sodium hydroxide solution of 2%-5%.
Further, described sterilization pool is the disinfection by ultraviolet light pond.
Further, described sludge outlet rear end is connected with device for dehydrating sladge waste.
The beneficial effect of the utility model town sewage advanced treatment system:
1, the utility model town sewage advanced treatment system, adopt the MBR membrane technique to be combined with the Adsorption Phase of the compound adsorbent of nano hydrated ferric oxide, utilize the hydrous iron oxide compound adsorbent to carry out the advanced treatment of dephosphorization, thereby remedied the deficiency of MBR dephosphorization weak effect.
2, the utility model town sewage advanced treatment system after the nano hydrated ferric oxide Composite Adsorbent Absorbing is saturated, utilizes aqueous sodium hydroxide solution to regenerate, and regenerability is good, physical strength is high, reusable.
3, the utility model town sewage advanced treatment system, the effect after the sewage disposal is good, processes in the rear water outlet COD＜50mg/L, BOD＜10mg/L, SS＜10mg/L, TP＜0.2mg/L, NH
3-N＜3mg/L, the water quality of water outlet is better than the A standard in the GB18918-2002 primary standard.
4, the utility model town sewage advanced treatment system, the characteristics such as have flow process weak point, less investment, floor space is little and operating performance is stable.
Description of drawings
Fig. 1 is the structural representation of the town sewage treatment system described in the utility model embodiment one.
Embodiment
Below in conjunction with Figure of description the utility model is further described.
Embodiment one:
As shown in Figure 1, this example town sewage advanced treatment system comprises that the grid waste disposal plant, horizontal flow type grit chamber, anoxic pond, MBR Aerobic Pond, the inside that are connected successively are filled with adsorption filter and the sterilization pool of the nano hydrated ferric oxide compound adsorbent take macroporous anion exchange resin as carrier, the sewage disposal scale is 5.0 ten thousand m3/d, intakes to be town domestic sewage.
Described grid waste disposal plant comprises coarse grid sewage treating machine and thin grid sewage treating machine; Described coarse grid sewage treating machine grizzly bar gap is 30mm; The grizzly bar gap of described thin grid sewage treating machine is 8mm; The grid waste disposal plant is in order to remove the suspended substance in the sewage;
Described horizontal flow type grit chamber is in order to precipitate the particles of inorganic material in the sewage;
Described anoxic pond is processed in order to sewage is carried out denitrification denitrogenation;
Described MBR Aerobic Pond is processed in order to sewage is carried out deep purifying, and the bottom is provided with sludge outlet;
Particularly, described sludge outlet rear end is connected with device for dehydrating sladge waste;
Described adsorption filter is in order to further to carry out dephosphorization treatment to sewage;
Described sterilization pool is in order to sterilization that sewage is carried out disinfection.
Further, the sludge outlet of described MBR Aerobic Pond also is connected with described anoxic pond by pipeline, described pipeline in order to the part sludge reflux to the described anoxic pond, reflux ratio is 30%-60% usually.
The described town sewage advanced treatment system of this example may further comprise the steps when carrying out sewage disposal:
1) treatment sewage is the coarse rack sewage treating machine of 30mm and the fine fack sewage treating machine that the grizzly bar gap is 8mm through the grizzly bar gap successively, with larger suspended substance in the interception water;
2) then this water enters horizontal flow type grit chamber, and to remove the inorganic particle in the water, hydraulic detention time is 60s;
3) the horizontal flow type grit chamber water outlet enters anoxic pond, carries out denitrification denitrogenation and process under the condition that stirs, and the pool inner water power residence time is 2.5h, and mixed liquor suspended solid, MLSS concentration (MLSS) is 3-4g/L, dissolved oxygen concentration 1.0mg/L;
4) the anaerobic pond water outlet enters the Aerobic Pond of built-in MBR flat sheet membrane, and the pool inner water power residence time is 4h, and MLSS is 10-12g/L, and by blast aeration, the dissolved oxygen of keeping is at 3.0mg/L;
In step 4) in also comprise at least part of mud outward transport after the plate-and-frame filter press dehydration that will produce, but the nutritious landfill of the mud after the processing or fertile as farming;
5) water outlet of MBR Aerobic Pond enters adsorption filter, be filled with the nano hydrated ferric oxide compound adsorbent take macroporous anion exchange resin as carrier in the pond, the absorption flow velocity is 40 bed volumes per hour, adsorb the material after saturated, employing proportion is 2% NaOH solution, under 20 degrees centigrade of temperature, regenerate with 1 bed volume per hour.
6) the sterilization and disinfection processing is carried out in the adsorption filter water outlet.
In addition, the MBR Aerobic Pond also is back to sludge part in the anoxic pond by the ratio of pipeline with reflux ratio 30%-60%.And reflux ratio described in the present embodiment is 50%.
After the operation of present embodiment town sewage advanced treatment system, obtained good operating performance, delivery turbidity＜5NTU, COD＜50mg/L, BOD＜10mg/L, SS suspended substance＜10mg/L, TP phosphorus content＜0.2mg/L, NH3-N ammonia-nitrogen content＜5mg/L satisfies the one-level A standard among " water quality standard is used mixedly in the city " GB/T 18920-2002 and " urban wastewater treatment firm pollutant emission standard " GB18918-2002.In addition, the described town sewage advanced treatment system of present embodiment also has the advantages such as treatment scheme is short, less investment, and running cost is low, floor space is little, and is stable.
Embodiment two:
This example town sewage advanced treatment system comprises the grid waste disposal plant, cyclone-type sand precipitating pool, anoxic pond, MBR Aerobic Pond, adsorption filter and the sterilization pool that are connected successively; Wherein said grid waste disposal plant comprises two-stage, and the first step is that coarse rack sewage treating machine and grizzly bar gap are 25mm, and the second stage is that thin grid sewage treating machine and grizzly bar gap are 5mm.In concrete application process, described grid waste disposal plant can also can be for multistage for one-level.When described grid waste disposal plant only had one-level, the grizzly bar interval was preferably 6-12mm, also can reach advanced treatment of wastewater one-level A standard.But have a problem, and one-level grid sewage treating machine interception needs frequently cleaning, otherwise will cause out the problem such as shipwreck.When described grid waste disposal plant adopts 3 grades or 4 grades or more multistage the time, increased the hardware investment cost of system, and improved the complexity of structure.So adopting the two-layer configuration of coarse grid sewage treating machine and thin grid sewage treating machine is preferred structure.Be provided with Flat MBR membrane element in the described MBR Aerobic Pond.Described sterilization pool is the disinfection by ultraviolet light pond that is built-in with apparatus for ultraviolet disinfection.
The sewage disposal scale of the described town sewage advanced treatment system of present embodiment is 2.0 ten thousand m3/d, intakes to be town domestic sewage.
The described town sewage advanced treatment system of this example may further comprise the steps in concrete town sewage advanced treatment:
1) treatment sewage is the coarse rack sewage treating machine of 25mm and the fine fack sewage treating machine that the grizzly bar gap is 5mm through the grizzly bar gap successively, with larger suspended substance in the interception water;
2) then this water enters cyclone-type sand precipitating pool, and to remove the inorganic particle in the water, hydraulic detention time is 40s;
3) phegma of the water outlet of cyclone-type sand precipitating pool and Aerobic Pond together enters anoxic pond, carries out denitrification denitrogenation and process under the condition that stirs, and the pool inner water power residence time is 2h, and MLSS is 2-3g/L, dissolved oxygen concentration 1.5mg/L;
4) the anaerobic pond water outlet enters the Aerobic Pond of built-in MBR flat sheet membrane, and the pool inner water power residence time is 6h, and MLSS is 8-10g/L, and by blast aeration, the dissolved oxygen of keeping is at 3.0mg/L;
In step 4) in comprise that also the part mud that will produce is back to anaerobic pond by the sludge pipe of Aerobic Pond bottom, reflux ratio is 40%, excess sludge outward transport after the plate-and-frame filter press dehydration, but landfill or fertile as farming;
5) water outlet of MBR Aerobic Pond enters adsorption filter, be filled with the nano hydrated ferric oxide compound adsorbent take gac as carrier in the pond, the absorption flow velocity is 50 bed volumes per hour, adsorb the material after saturated, employing proportion is 2% NaOH solution, under 25 degrees centigrade of temperature, regenerate with 2 bed volumes per hour;
6) the adsorption filter water outlet enters the uv sterilisation pond, carries out sterilization and disinfection.
After the described town sewage advanced treatment system operation of present embodiment, obtained good operating performance, delivery turbidity＜3NTU, COD＜50mg/L, BOD＜10mg/L, SS＜10mg/L, TP＜0.1mg/L, NH3-N＜3mg/L satisfies the one-level A standard among " water quality standard is used mixedly in the city " GB/T 18920-2002 and " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Embodiment three:
This example town sewage advanced treatment system scale is 1.0 ten thousand m3/d, mainly comprises grid waste disposal plant, aeration type settling pit, anoxic pond, MBR Aerobic Pond, adsorption filter and sterilization pool.Described grid waste disposal plant comprises coarse grid sewage treating machine and thin grid sewage treating machine.
The sewage disposal of this example town sewage advanced treatment system may further comprise the steps:
1) treatment sewage is the coarse rack sewage treating machine of 20mm and the fine fack sewage treating machine that the grizzly bar gap is 3mm through the grizzly bar gap successively, with larger suspended substance in the interception water;
2) then this water enters the aeration type settling pit, and to remove the inorganic particle in the water, hydraulic detention time is 30s;
3) phegma of the water outlet of aeration type settling pit and Aerobic Pond together enters anoxic pond, carries out denitrification denitrogenation and process under the condition that stirs, and the pool inner water power residence time is 1h, and MLSS is 3-4g/L, dissolved oxygen concentration 1.0mg/L;
4) the anaerobic pond water outlet enters the Aerobic Pond of built-in MBR flat sheet membrane, and the pool inner water power residence time is 4h, and MLSS is 8-10g/L, and by blast aeration, the dissolved oxygen of keeping is at 3.0mg/L;
In step 4) in comprise that also the part mud that will produce flow to anaerobic pond by the back of pipeline of MBR Aerobic Pond bottom, reflux ratio is 60%, excess sludge can apply to landfill or fertile as farming outward after the concentrated one device for dehydrating sladge waste of belt is processed;
5) water outlet of MBR Aerobic Pond enters adsorption filter, being filled with diatomite in the pond is the nano hydrated ferric oxide compound adsorbent of carrier, the absorption flow velocity is 50 bed volumes per hour, adsorb the material after saturated, employing proportion is 2.5% NaOH solution, under 20 degrees centigrade of temperature, regenerate with 2 bed volumes per hour.
6) the adsorption filter water outlet enters the uv sterilisation pond of built-in ultraviolet equipment, through sterilization and disinfection.
Sewage after the described town sewage advanced treatment system of present embodiment is processed, clean respond well, satisfy the one-level A standard among " water quality standard is used mixedly in the city " GB/T 18920-2002 and " urban wastewater treatment firm pollutant emission standard " GB18918-2002.The parameter of concrete cleaning is as follows:
Delivery turbidity＜5NTU, COD＜50mg/L, BOD＜10mg/L, SS＜10mg/L, TP＜0.2mg/L, NH3-N＜5mg/L.
Embodiment four:
The sewage disposal scale of this example town sewage advanced treatment system is 6000m3/d, intakes to be town domestic sewage.Described town sewage advanced treatment system comprises that form the grid waste disposal plant, cyclone-type sand precipitating pool, anoxic pond, MBR Aerobic Pond, inside that are spaced apart the coarse grid sewage treating machine of 25mm and thin grid sewage treating machine that grizzly bar is spaced apart 3mm by grizzly bar that are connected successively are filled with adsorption filter and the sterilization pool that is divided into the nano hydrated sample iron compound adsorbent of carrier with coal;
Described grid waste disposal plant is in order to remove the suspended substance in the sewage;
Described cyclone-type sand precipitating pool is in order to precipitate the particles of inorganic material in the sewage;
Described anoxic pond is in order to carry out nitrated denitrogenation processing to sewage;
Described MBR Aerobic Pond is processed in order to sewage is carried out deep purifying, and the bottom is provided with sludge outlet; Described sludge outlet rear end is connected with device for dehydrating sladge waste;
Described adsorption filter is provided with the input tube for the input NaOH aqueous solution, in order to further sewage is carried out dephosphorization treatment;
Described sterilization pool is in order to sterilization that sewage is carried out disinfection.
This example town sewage advanced treatment system may further comprise the steps when carrying out sewage disposal:
1) treatment sewage is that coarse rack and the grizzly bar gap of 25mm is the fine fack of 3mm through the grizzly bar gap successively, with larger suspended substance in the interception water;
2) then this water enters cyclone-type sand precipitating pool, and to remove the inorganic particle in the water, hydraulic detention time is 60s;
3) phegma of the water outlet of cyclone-type sand precipitating pool and Aerobic Pond together enters anoxic pond, carries out denitrification denitrogenation and process under the condition that stirs, and the pool inner water power residence time is 1h, and MLSS is 2-3g/L, dissolved oxygen concentration 1.5mg/L;
4) the anaerobic pond water outlet enters the Aerobic Pond of built-in Flat MBR membrane element, and the pool inner water power residence time is 2h, and MLSS is 10-12g/L, and by blast aeration, the dissolved oxygen of keeping is at 3.0mg/L;
In step 4) in comprise that also the part mud that will produce is back to anaerobic pond by the sludge pipe of Aerobic Pond bottom, reflux ratio is 30%, excess sludge outward transport after the concentrated one water extracter of belt is processed, but landfill or fertile as farming;
5) water outlet of MBR Aerobic Pond enters adsorption filter, the absorption flow velocity is 50 bed volumes per hour, and the material after the nano hydrated ferric oxide Composite Adsorbent Absorbing is saturated, employing proportion are 2.5% NaOH solution, under 25 degrees centigrade of temperature, regenerate with 2 bed volumes per hour.
6) the adsorption filter water outlet enters the uv sterilisation pond of built-in ultraviolet equipment, through sterilization and disinfection.
Behind this engineering operation, obtained good operating performance, delivery turbidity＜5NTU, COD＜40mg/L, BOD＜10mg/L, SS＜5mg/L, TP＜0.1mg/L, NH3-N＜3mg/L satisfies the one-level A standard among " water quality standard is used mixedly in the city " GB/T 18920-2002 and " urban wastewater treatment firm pollutant emission standard " GB18918-2002.
Comprehensively embodiment one to embodiment four as can be known: grid waste disposal plant described in the town sewage advanced treatment system described in the utility model can also can for multistage, be preferably coarse grid sewage treating machine and the thin grid sewage treating machine of two-stage for one-level; The grizzly bar gap of described coarse grid sewage treating machine is 20-30mm; The grizzly bar gap of described thin grid sewage treating machine is 5-10mm.The available kind of described settling pit comprises three kinds at least, horizontal flow type grit chamber, cyclone-type sand precipitating pool and aeration type settling pit.The available kind of the carrier of the compound adsorbent of described nano hydrated ferric oxide comprises macroporous anion exchange resin, activated carbon, diatomite and coal powder at least.
More than; it only is preferred embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.
Claims (9)
1. town sewage advanced treatment system, it is characterized in that described town sewage advanced treatment system comprises the settling pit in order to the grid waste disposal plant of removing suspended substance, precipitation inorganic particulate matter that is connected successively, carries out anoxic pond, MBR Aerobic Pond, adsorption filter and sterilization pool that denitrification denitrogenation is processed;
Wherein,
Described MBR Aerobic Pond bottom is provided with sludge outlet;
Be filled with the compound adsorbent of nano hydrated ferric oxide in the described adsorption filter, in order to further sewage is carried out dephosphorization treatment.
2. town sewage advanced treatment system according to claim 1 is characterized in that, described grid waste disposal plant comprises coarse grid sewage treating machine and thin grid sewage treating machine; Described coarse grid sewage treating machine grizzly bar gap is 20-30mm; Described thin grid sewage treating machine grizzly bar gap is 5-10mm.
3. town sewage advanced treatment system according to claim 1 is characterized in that, described settling pit is horizontal flow type grit chamber, cyclone-type sand precipitating pool or aeration type settling pit.
4. town sewage advanced treatment system according to claim 1 is characterized in that, described MBR Aerobic Pond comprises Flat MBR membrane element.
5. according to claim 1 or 4 described town sewage advanced treatment systems, it is characterized in that the sludge outlet of described MBR Aerobic Pond also is connected with described anoxic pond by pipeline; Described pipeline in order to the part sludge reflux to the described anoxic pond, and reflux ratio is 30%-60%.
6. town sewage advanced treatment system according to claim 1 is characterized in that, described nano hydrated ferric oxide comprises carrier, and described carrier is macroporous anion exchange resin, activated carbon, diatomite or coal powder.
7. town sewage advanced treatment system according to claim 1 is characterized in that, described adsorption filter also comprises one in order to input the input tube that proportion is the aqueous sodium hydroxide solution of 2%-5%.
8. town sewage advanced treatment system according to claim 1 is characterized in that, described sterilization pool is the disinfection by ultraviolet light pond.
9. town sewage advanced treatment system according to claim 1 is characterized in that, described sludge outlet rear end is connected with device for dehydrating sladge waste.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421518 CN202808537U (en) | 2012-08-23 | 2012-08-23 | Town sewage deep treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220421518 CN202808537U (en) | 2012-08-23 | 2012-08-23 | Town sewage deep treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202808537U true CN202808537U (en) | 2013-03-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775029A (en) * | 2012-08-23 | 2012-11-14 | 中冶华天工程技术有限公司 | Advanced municipal wastewater treatment system and method |
| CN103449687A (en) * | 2013-09-30 | 2013-12-18 | 山西科元晟地科技有限公司 | Method for processing domestic sewage through diatomite biological system |
| CN106145510A (en) * | 2015-04-14 | 2016-11-23 | 上海子征环保科技有限公司 | A kind of method using water supply plant dewatered sludge reinforced film biological reactor phosphor-removing effect |
| CN108816178A (en) * | 2018-06-07 | 2018-11-16 | 暨南大学 | A kind of porous ceramic grain and preparation method loading nano-iron oxide |
-
2012
- 2012-08-23 CN CN 201220421518 patent/CN202808537U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775029A (en) * | 2012-08-23 | 2012-11-14 | 中冶华天工程技术有限公司 | Advanced municipal wastewater treatment system and method |
| CN103449687A (en) * | 2013-09-30 | 2013-12-18 | 山西科元晟地科技有限公司 | Method for processing domestic sewage through diatomite biological system |
| CN106145510A (en) * | 2015-04-14 | 2016-11-23 | 上海子征环保科技有限公司 | A kind of method using water supply plant dewatered sludge reinforced film biological reactor phosphor-removing effect |
| CN108816178A (en) * | 2018-06-07 | 2018-11-16 | 暨南大学 | A kind of porous ceramic grain and preparation method loading nano-iron oxide |
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