CN208218620U - A kind of town sewage treatment system up to standard to IV class water of surface water - Google Patents
A kind of town sewage treatment system up to standard to IV class water of surface water Download PDFInfo
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- CN208218620U CN208218620U CN201820482465.9U CN201820482465U CN208218620U CN 208218620 U CN208218620 U CN 208218620U CN 201820482465 U CN201820482465 U CN 201820482465U CN 208218620 U CN208218620 U CN 208218620U
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Abstract
The utility model discloses a kind of town sewage treatment systems up to standard to IV class water of surface water, including polluted water pretreatment apparatus, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, secondary settling tank, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter to be connected in series；Polluted water pretreatment apparatus connect and communicates with pre- denitrification pond, the 1st anaerobic pond respectively；Muddy water reflux line is equipped between secondary settling tank and pre- denitrification pond to be connected to；Muddy water reflux line is equipped between 1st aerobic tank and the 1st anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,；1st anaerobic pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond or denitrification and denitrogenation biological filter is communicated with oxidation disinfection bath, oxygenation pond series winding.The utility model ensure that each good in nitrate nitrogen removal effect is up to standard to IV class water quality standard.
Description
Technical field
The utility model relates to technical field of sewage, and it is dirty to refer in particular to a kind of cities and towns up to standard to IV class water of surface water
Water treatment system.
Background technique
As China's water pollution problems increasingly highlights, the raising of urban wastewater treatment discharge standard has been trend of the times.From
The requirement that current quality of water environment improves sees, treated for many municipal sewage plants, and water outlet is often discharged into urban river,
Water body as river.The existing sewage disposal plant effluent in China, discharge standard refer to " at GB18918-2002 town sewage more
Manage factory's pollutant emission standard " in level-one A.However for level-one A standard, water quality just corresponds to bad V class of surface water
Water.This water quality is discharged into the water body environment there are few self-purification capacity, causes water body not repaired not only, instead by dirt
Then there is the phenomenon that " the more controlling the more dirty " in dye.Water pollution increasingly sharpens, and an urgent demand effluent of municipal sewage plant reaches
IV class standard of earth's surface class.I.e. by CODCr30mg/l is reduced to by the 50mg/L of level-one A；BOD5It is reduced to by the 10mg/L of level-one A
6mg/L；Ammonia nitrogen is reduced to 1.5mg/L by the 5mg/L of level-one A；Total phosphorus is reduced to 0.3mg/L by the 0.5mg/L of level-one A；Total nitrogen
5mg/L is reduced to by the 15mg/L of level-one A；Dissolved oxygen (DO) is improved by the no requirement (NR) of level-one A to 3mg/L.
1 Effluent criteria level-one A of table and IV class water quality contrast table of earth's surface
Currently, expansion practice successively in all parts of the country, to sewage effluents CODCr, ammonia nitrogen, total nitrogen, total phosphorus etc. requirement more
Height, existing IV class water system are actually difficult to up to standard all referring to marking.Therefore, it is necessary to develop the new technical solution of one kind to solve
State problem.But there are still following key problems for existing IV class water treatment system: (1) part of two stage biological processing system is designed not
Rationally place, each function sludge age and dominant microflora are difficult to control；Organic carbon source does not make full use of in water inlet；Organic carbon in water inlet
Source does not make full use of, and nitric efficiency is lower；Nitrification not exclusively, when winter temperature is lower, is discharged NH4 +- N is difficult control and exists
1.5mg/L following；Water outlet TP is generally higher than 1.0mg/L；And tradition A2O Nitrogen/Phosphorus Removal is unstable；(2) traditional chemistry removes
Phosphorus technology, pharmaceutical use is big, and treatment effect is poor, and surface loading is low, takes up a large area, it cannot be guaranteed that stably reaching IV class water
Index；(3) the smart denitrogenation of tradition has the following problems frequently with denitrification and denitrogenation biological filter: 1) industry known in, due to anoxic/
Hardened between biologic packing material under anaerobic denitrifying environment, short stream etc. influences, the water outlet of the denitrification bio-filter after additional carbon
CODCrInfluent COD can be comparedCrGao Yue -10~25mg/L, level-one A and IV class water CODCrDiffer only by 20mg/L, BOD5Differ only by 4mg/
L, IV class water are discharged CODCrAnd BOD5It is extremely unstable；2) the carbon source kind selection of denitrification filter pool, the accurate dosage control of carbon source
It is very crucial, for BOD5Level-one A and IV class water differ only by 4mg/L, directly influence water outlet CODCrIncrease how many, denitrification
Utilization of carbon source rate and whether can stably reaching standard core key, it is necessary to accurate control；(4) denitrification and denitrogenation biological filter water outlet has
Machine object concentration increases, and later process unit is without reduction CODCrAnd BOD5Exceeded measure；(5) due to denitrification denitrogenation be anoxic/
Occur under anaerobic environment, the waste water dissolved oxygen (DO) after denitrification advanced nitrogen is generally below 0.2mg/L, and IV class water
Dissolved oxygen otherwise be lower than 3mg/L, therefore other measures is needed to further increase the dissolved oxygen (DO) of sewage, and existing IV class water
Processing system does not consider this key index.
Utility model content
Purpose of the utility model is to overcome the above-mentioned shortcomings and provide a kind of town sewages up to standard to IV class water of surface water
Processing system, the utility model can fundamentally solve traditional IV class water system, and to go out water unstable up to standard and be difficult to reach all referring to mark
The requirement for reaching IV class water quality standard all referring to mark can be completely secured in target problem.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of town sewage treatment system up to standard to IV class water of surface water, which is characterized in that institute's sewage disposal system by
Polluted water pretreatment apparatus, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank,
Secondary settling tank, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus
It connect and communicates with pre- denitrification pond, the 1st anaerobic pond respectively；Muddy water reflux line is equipped between secondary settling tank and pre- denitrification pond to connect
Logical, reflux muddy water can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%；1st aerobic tank with
Muddy water reflux line is equipped between 1st anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,.；1st anaerobism
Pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, and water outlet enters through ozone pond
IV class water quality standard can be stably reached all referring to mark after processing；Or denitrification and denitrogenation biological filter and oxidation disinfection bath, oxygenation pond are contacted
It communicates, water outlet stably reaches IV class water quality standard all referring to mark after " oxidation disinfection bath+oxygenation pond " processing；Sewage after up to standard into
Row outlet.
Further, the 1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is existed by nitrate nitrogen
Line monitoring system carries out linking to be precisely controlled adding.
Further, the additional carbon is preferably methanol or sodium acetate.
Further, the polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
Further, the magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with outer adding medicine device, and the medicament added is magnetic kind
Or one of sand kind and iron series or aluminium system, iron aluminium system salt.
Further, the denitrification and denitrogenation biological filter is upward flow denitrification and denitrogenation biological filter or lower raw to flow denitrification
Object filter tank.
The utility model has the beneficial effects that
(1) it is intake using multiple spot reasonable distribution, raw water utilization of carbon source is more abundant.
(2) the pre- denitrification pond processing that the muddy water of secondary settling tank reflux is set, eliminates reflux kind using the carbon source of raw water
Nitrate nitrogen in mud alleviates the inhibiting effect to anaerobic phosphorus release, and greatly improve anaerobic pond releases phosphorus effect；PolyP bacteria is improved good
Excessively inhale phosphorus effect in oxygen pond；Each function sludge age and dominant microflora control are more reasonable.
It is anti-that (3) first anoxic ponds make full use of carbon source (raw water carbon source, supplementary carbon source) to carry out denitrification, denitrification dephosphorization
It answers, nitrate nitrogen removal is more abundant；Additional carbon can make up for it the deficiency of denitrifying carbon source, improve denitrification effect；Second anoxic pond
It ensure that the further removal of nitrogen；Second aerobic tank can fully ensure that water quality, prevent water quality wave except assisting nitrification, assistance to inhale phosphorus
It is dynamic, well can also stripping be attached to nitrogen on sludge, prevent Mud up-floating.
(4) magnetic kind or sand kind magnetic flocculation deep phosphorous removal sedimentation basin, using magnetic kind or sand kind as nucleus, so that magnetic powder or sand
Kind and the progress of phosphatization sediment wadding body are efficiently coprecipitated, are the occupied areas 1/20 of conventional coagulative precipitation tank, save 20% or more
Iron series or aluminium system salt, and magnetic kind or sand kind have 99% or more the rate of recovery；Treatment effect is more excellent, and occupied area is smaller,
Convenient for industrialization and it is widely applied.
(5) denitrification and denitrogenation biological filter water inlet total nitrogen is fluctuation (wherein nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, organic nitrogen
Concentration is also fluctuation), the utility model passes through linkage monitoring nitre state (NO onlinex -- N) index and then it is precisely controlled the throwing of carbon source
Dosage solves and is discharged (TN, COD caused by each index fluctuation of influent qualityCr、BOD5) it is unable to the problem of stably reaching standard, it can protect
Card water outlet TN, CODCr、BOD5Etc. indexs stably reaching standard.Our company is according to long-term pilot scale research and engineer application summary of experience hair
Existing, relative to carbon sources such as acetic acid, glucose, the economic benefit and utilization rate of sodium acetate and methanol are higher, and denitrification denitrogenation is raw
The water outlet COD in object filter tankCr、BOD5It is small to increase probability, is easier to be precisely controlled that IV each index of class water is up to standard, this test and experience are total
Knot can fundamentally solve most of problem of denitrification denitrogenation fluctuation of service in IV class water system.
(6) it solves in traditional IV class water system, denitrification and denitrogenation biological filter is discharged CODCr、BOD5Probability rising,
By setting subsequent processing units (oxidation, disinfection), oxidation increases organic matter, part ammonia nitrogen, and then reduces CODCr、BOD5Etc. referring to
Mark, solves the problems, such as out that water unstable is up to standard.
(7) it solves in traditional IV class water system, dissolved oxygen (DO) key index cannot be up to standard to IV class water quality standard
Requirement.
The utility model can fundamentally solve traditional IV class water system, and to go out water unstable up to standard and be difficult to reach all referring to mark
The requirement for reaching IV class water quality standard all referring to mark can be completely secured in target problem.
Detailed description of the invention
Fig. 1 is the town sewage treatment system schematic diagram up to standard to IV class water of surface water of the utility model
Specific embodiment
From attached drawing 1 as can be seen that the utility model town sewage treatment system up to standard to IV class water of surface water is by sewage
Pre-processing device, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, two sink
Pond, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus difference
It connect and communicates with pre- denitrification pond, the 1st anaerobic pond；Muddy water reflux line is equipped between secondary settling tank and pre- denitrification pond to be connected to,
The muddy water that flows back can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%, and excess sludge periodically discharges；Institute
State between the 1st aerobic tank and the 1st anoxic pond be equipped with muddy water reflux line, muddy water mixed solution be back to reflux ratio be 100%~
400%.；1st anaerobic pond, the 2nd anoxic pond set additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, is gone out
Water, which enters, can stably reach IV class water quality standard all referring to mark after the processing of ozone pond；Or denitrification and denitrogenation biological filter and oxidation sterilizing
Pond, oxygenation pond series winding communicate, and water outlet stably reaches IV class water quality standard all referring to mark after " oxidation disinfection bath+oxygenation pond " processing；
Sewage after up to standard carries out outlet.
1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is monitored on-line by nitrate nitrogen
System carries out linking to be precisely controlled adding.
The additional carbon is preferably methanol or sodium acetate.
The polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
The magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with outer adding medicine device, the medicament added be magnetic kind or sand kind it
One and iron series or aluminium system, iron aluminium system salt.
The denitrification and denitrogenation biological filter is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter.
The utility model town sewage treatment system treatment process up to standard to IV class water of surface water is as follows:
(1) town sewage is pre-processed by sewage by grid, setting pot or primary sedimentation tank, remove sand in sewage,
Stone and bulk particulate matter substance；Guarantee the stability of later period biochemical reaction；.
(2) sewage is divided into two parts sewage after pre-processing；The mud of a part of sewage (10%~40%) and secondary settling tank reflux
Water enters the pre- denitrification pond of pre- denitrification after being sufficiently mixed, the organic matter (ss suspended solid and molten being utilized respectively in pretreating sewage
Solution property organic matter) and reflux muddy water in nitrate (nitrate nitrogen, nitrite nitrogen) carry out pre- anti-nitration reaction, removal returned sludge
In nitrate nitrogen, organic matter, the inhibition for mitigating later period anaerobic phosphorus release influences, while carrying out aminating reaction；Another part sewage
(60%~90%) enters anaerobic pond after mixing with pre-denitration pond water outlet and carries out releasing phosphorus reaction, simultaneously using the carbon source in raw water
Carry out aminating reaction；
(3) the anaerobic pond water outlet enters anoxic pond, using carbon source in raw water, carries out denitrification denitrogenation reaction, will be in water
Nitrate nitrogen be converted to nitrogen removal, while the reaction such as carry out ammonification；In raw water when carbon source deficiency, organic carbon source can be additionally added；
(4) the anoxic pond water outlet enters aerobic tank, carries out aerobic nitrification, synchronous nitration and denitrification, inhales phosphorus reaction, simultaneously
Sludge Surface nitrogen is released into the water surface, the aerobic tank dissolved oxygen is 1.5~4.0mg/L；The muddy water of the aerobic tank mixes
Liquid is back to anoxic pond, and reflux ratio is 100%~400%；
(5) the aerobic tank water outlet enters secondary settling tank, realizes mud-water separation, the sludge part of precipitating flows back into pre- denitrification
Pre- denitrification pond, return sludge ratio are 30%~100%, and excess sludge periodically discharges；
(6) supernatant of secondary settling tank discharge enters magnetic or sand load flocculation deep phosphorous removal sedimentation basin, removes remainder
SS and TP guarantees water outlet SS and TP stably reaching standard；The medicament that the magnetic or sand load flocculation deep phosphorous removal sedimentation basin add is magnetic
One of kind or sand kind and iron series or aluminium system, iron aluminium system salt；Using magnetic kind or sand kind as nucleus, so that magnetic powder or sand kind and phosphatization
The progress of sediment wadding body is efficiently coprecipitated, greatly improves the removal efficiency and sedimentation time of phosphorus, while reducing the usage amount of medicament, sand
Kind or the magnetic kind rate of recovery are also above 99% or more.
(7) magnetic or sand load flocculation deep phosphorous removal sedimentation basin water outlet enter denitrification and denitrogenation biological filter, carry out further
Ground depth removes SS and nitrate nitrogen, and remaining nitrate nitrogen is converted to nitrogen using additional carbon source；The denitrification denitrogenation biology
Filter tank is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter；Additional carbon passes through filter tank water inlet end
" nitrate nitrogen on-line monitoring system " progress " linkage is precisely controlled its dosage ", solves the problems, such as caused by variation water quality from core source
Water unstable problem out；The additional carbon in the denitrification denitrogenation filter tank is preferably methanol or sodium acetate, the pilot scale of our company
Research and engineering experience show compared to other carbon source kinds, using two kinds of carbon sources, for reducing denitrification denitrogenation biological filter
Pond is discharged CODCrAnd BOD5Probability is of great significance；
(8) denitrification and denitrogenation biological filter water outlet enters ozone pond, synchronizes disinfection, oxidation residual organic substances, improves
Oxygen in water reaction can stably reach IV class water quality standard all referring to mark after the processing of ozone pond；Or denitrification and denitrogenation biological filter
Water outlet enters " oxidation disinfection bath+oxygenation pond ", carries out disinfection, aoxidizes residual organic substances and part ammonia nitrogen, improves oxygen in water
Reaction；IV class water quality standard is stably reached all referring to mark after " oxidation disinfection bath+oxygenation pond " processing；And then it is decided from subsequent port solution
Water fluctuation problem solves denitrification and denitrogenation biological filter and leading portion effluent quality fluctuation problem, after the measure, it is ensured that each
Index stably reaching standard outlet.
The utility model provides a kind of thinking and method, and there are many method and the approach for implementing the technical solution, with
It is only preferred embodiments of the present invention described in upper, it is noted that for those skilled in the art,
Without departing from the principle of this utility model, several improvements and modifications can also be made, these improvements and modifications should also regard
For the protection scope of the utility model, all undefined components in this embodiment can be implemented in the prior art.
Claims (6)
1. a kind of town sewage treatment system up to standard to IV class water of surface water, which is characterized in that institute's sewage disposal system is by dirt
Water pretreatment equipment, pre- denitrification pond, the 1st anaerobic pond, the 1st anoxic pond, the 1st aerobic tank, the 2nd anoxic pond, the 2nd aerobic tank, two
Heavy pond, magnetic or magnetic load flocculation dephosphorization sedimentation basin, denitrification and denitrogenation biological filter are connected in series；Polluted water pretreatment apparatus point
It does not connect and communicates with pre- denitrification pond, the 1st anaerobic pond；Muddy water reflux line is equipped between secondary settling tank and pre- denitrification pond to be connected to,
Its muddy water that flows back can enter pre- denitrification pond by pipeline, and return sludge ratio is 30%~100%；1st aerobic tank and the 1st
Muddy water reflux line is equipped between anoxic pond, it is 100%~400% that muddy water mixed solution, which is back to reflux ratio,；1st anaerobic pond,
2nd anoxic pond sets additional carbon respectively；Denitrification and denitrogenation biological filter is connected to ozone pond, and water outlet enters to be handled through ozone pond
IV class water quality standard can be stably reached all referring to mark afterwards；Or denitrification and denitrogenation biological filter is communicated with oxidation disinfection bath, oxygenation pond series winding,
It, which is discharged, stably reaches IV class water quality standard all referring to mark after " oxidation disinfection bath+oxygenation pond " processing；Sewage after up to standard carries out outer
Row.
2. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that pass through
1st anaerobic pond, the 2nd anoxic pond water inlet end are equipped with nitrate nitrogen on-line monitoring system, and additional carbon is carried out by nitrate nitrogen on-line monitoring system
Linkage, which is precisely controlled, to be added.
3. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Additional carbon is preferably methanol or sodium acetate.
4. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Polluted water pretreatment apparatus is that sewage passes through grid, setting pot or primary sedimentation tank.
5. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Magnetic or sand load flocculation dephosphorization sedimentation basin are equipped with additional pharmaceutical system, and the medicament added is one of magnetic kind or sand kind and iron series or aluminium
System, iron aluminium system salt.
6. the town sewage treatment system up to standard to IV class water of surface water according to claim 1, which is characterized in that described
Denitrification and denitrogenation biological filter is upward flow denitrification and denitrogenation biological filter or lower to flow denitrification biofilter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820482465.9U CN208218620U (en) | 2018-03-30 | 2018-03-30 | A kind of town sewage treatment system up to standard to IV class water of surface water |
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| CN201820482465.9U CN208218620U (en) | 2018-03-30 | 2018-03-30 | A kind of town sewage treatment system up to standard to IV class water of surface water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585350A (en) * | 2018-03-30 | 2018-09-28 | 安徽华骐环保科技股份有限公司 | A kind of town sewage treatment system up to standard to IV class water of surface water |
| CN110902949A (en) * | 2019-11-29 | 2020-03-24 | 江苏久吾高科技股份有限公司 | Sewage treatment process and device capable of achieving surface IV-class water discharge |
-
2018
- 2018-03-30 CN CN201820482465.9U patent/CN208218620U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108585350A (en) * | 2018-03-30 | 2018-09-28 | 安徽华骐环保科技股份有限公司 | A kind of town sewage treatment system up to standard to IV class water of surface water |
| CN110902949A (en) * | 2019-11-29 | 2020-03-24 | 江苏久吾高科技股份有限公司 | Sewage treatment process and device capable of achieving surface IV-class water discharge |
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