CN106517667B - A kind of device and method recycling nitrogen phosphorus from septic tank wastewater - Google Patents
A kind of device and method recycling nitrogen phosphorus from septic tank wastewater Download PDFInfo
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- CN106517667B CN106517667B CN201611162209.3A CN201611162209A CN106517667B CN 106517667 B CN106517667 B CN 106517667B CN 201611162209 A CN201611162209 A CN 201611162209A CN 106517667 B CN106517667 B CN 106517667B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/45—Phosphates containing plural metal, or metal and ammonium
- C01B25/451—Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Organic Chemistry (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
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Abstract
A kind of device and method that nitrogen phosphorus is recycled from septic tank wastewater of the present invention, belongs to technical field of waste water processing.The integrated apparatus is mainly composed of run-off, pretreatment pool, multifunctional examining well and crystallization reaction pond.Method: sewage enters septic tank processing system by user's drainpipe, pretreatment pool is entered by grid first, sludge sinks, and reaction fermentation generates gas and is discharged or recycled by gas outlet, and sewage supernatant reaches water outlet lowest water level line and enters crystallization reaction pond through pipeline.Sewage into crystallization reaction pond passes through shutting off and the degradation of attached microbial to crystalline deposit area for light filter material floor first, magnesium chloride and alkaline solution is added in auxiliary, sewage overcurrent is farthest set to form ammonium magnesium phosphate crystal, it is recycled, treated, and sewage flows to municipal sewage pipe network.If water is increased sharply or pretreatment pool catastrophic failure, sewage is directly entered run-off and flows into municipal sewage pipe network.Septic tank contamination processing capacity of the present invention is strong, recyclable nitrogen and phosphorous nutrient, and can be realized the multiple effect of sewage treatment and sewage, sludge resource utilization simultaneously, effectively reduce the nitrogen and phosphorus load of sewage plant, it is a kind of novel resource treatment technique, meets the requirement of sustainable development.
Description
Technical field
The invention belongs to technical field of waste water processing more particularly to it is a kind of from septic tank wastewater recycle nitrogen phosphorus device and
Method.
Background technique
Water body problem caused by China's nitrogen and phosphorus pollution is extremely serious, the septic tank as municipal sewage primary treatment structures
Although having played positive effect in the process of urbanization, its drawback is also slowly highlighted, and What is more has proposed perfect collection
The city of middle sewage treatment facility can not set the judgement of septic tank, show that the effect of nowadays septic tank slowly weakens, so opening up
Septic tank function is opened up, it is extremely urgent to find new septic tank type.
Septic tank removal efficiency of nitrogen and phosphorus is not high and a certain amount of organic matter of consumption, nutritive salt enter municipal drain with sewage
Net to sewage treatment plant focuses on, and will lead to sewage plant carbon source relative deficiency when handling municipal wastewater, and biochemical is poor, takes off
The problems such as nitrogen phosphor-removing effect is bad it requires the pretreatment mode before enhanced sewage enters sewage plant, mitigate the place of sewage plant
Manage load.
Traditional denitrogenation dephosphorizing mode operating cost is high, and have that theoretical precipitated product is unable to that the effective output utilizes lacks
It falls into, ammoniomagnesium phosphate crystal recycle was in the processed of high nitrogen phosphorus waste water such as sludge-digestion liquid, animal farm wastewater in recent years
Cheng Dangzhong, the application almost industry blank in septic tank wastewater processing.Discovery is investigated according to the early period to septic tank wastewater, this
Kind waste water quality suitably adds the available ammonium magnesium phosphate crystal of compound solution in magnesium source.
Nowadays the septic tank of China's application is generally two lattice or three compartment septic tanks, and the septic tank of this form is doomed
The unicity of digestion tank structure and processing mode, and the digestion tank structure of few other forms occurs in the market, utilizes
The design of the thinking of nutrient removal and recycling, which improves digestion tank structure and function, has great meaning to the popularization of Practical Project
Justice.
Summary of the invention
Water outlet nitrogen and phosphorus load is excessive after the present invention has a single function, handles for traditional septic tank, is difficult to realize Sewage
The drawbacks of mud recycles simultaneously provides a kind of with a kind of recycling nitrogen phosphor resource from septic tank wastewater for improving the above problem
Device and method.
In order to realize that above-mentioned technical problem, the present invention are implemented by technical solution below.
A kind of device and method recycling nitrogen phosphorus from septic tank wastewater, it is characterised in that the integrated apparatus is mainly by overflowing
Stream pond, pretreatment pool, multifunctional examining well and crystallization reaction pond are composed.Run-off is the guarantee type structure that sewage enters system
Object is built, standby pool when also overhauling as pretreatment pool is connect by outlet pipe with crystallization reaction bottom of pond portion；Pretreatment pool is one
A solid-liquid-gas three phase separate tank, wherein sludge is periodically drawn clearly, and the gas of generation is discharged or is collected by gas outlet, and outlet pipe extends
To crystallization reaction pond；The degradation of retention and attached microbial of the sewage through filtrate enters crystal region, and crystal becomes larger to precipitating
Area, periodically slow-release fertilizer use is made in recycling.
The device provided by the invention that nitrogen phosphorus is recycled from septic tank wastewater, it is characterised in that the run-off is brick
The square structure of plastering, bottom have outlet pipe to be connected to system outlet canal reserved outside crystallization reaction pond, are provided on outlet pipe
Check-valves, if occurring, water is increased sharply or pretreatment pool burst accident, run-off play interim water inlet, connect with pretreatment pool
Part setting weir；The pretreatment pool divides sludge blanket, gas chamber and three, contraminated zone part, and the gas that gas chamber is collected is by going out
Port discharge is collected, and sludge is periodically drawn mouth clearly and drawn clearly from reserved, and sewage, which flow to crystallization reaction pond by outlet pipe, to be continued
Reason, is provided with grid in water inlet position；The crystallization reaction pond is made of filtrate filled layer and crystalline deposit Disengagement zone；Institute
The multifunctional examining well stated is equipped between ladder, small-sized dosing, sludge clearing mouth and crystal recycle collection port, it is intended to be other units
Service.
The device provided by the invention that nitrogen phosphorus is recycled from septic tank, it is characterised in that the filter in the filtrate filled layer
Material selects light ceramic, the relevant feature of the filler are as follows: and density is small, intensity is high, water absorption rate is big, heat preservation, durable, heat resistanceheat resistant etc.,
Density is 300-500kg/m3；The crystallization reaction pond is the precast construction of glass reinforced plastic production, using inverted triangle funnel shaped；
Quantitative mixed chlorinated magnesium solution adds sodium hydroxide solution periodically to supplement magnesium ion to adjust pH between the small-sized dosing
Value generates precipitating for sewage to crystal region, is conducive to recycling.
The method that the present invention is to provide a kind of to recycle nitrogen phosphorus from septic tank wastewater, which is characterized in that including following step
Suddenly.
Step 1, sewage enter septic tank processing system by user's drainpipe, first pass around grid and flow into pretreatment pool,
Sludge sinks, and reaction fermentation generates gas and is discharged or recycled by gas outlet, and sewage supernatant reaches water outlet lowest water level line warp
Pipeline enters crystallization reaction pond.
Step 2, the sewage into crystallization reaction pond first pass around the degradation of light filter material layer shut off with attached microbial
Effect flows to crystalline deposit area, by adding lye, makes pH control in 7.5-9, is monitored by pH surveymeter, while daily according to dirt
Water flow automatic feeding magnesium chloride solution supplements magnesium source, makes sewage overcurrent in crystalline deposit area, utmostly forms ammonium magnesium phosphate
Crystal, sewage recycle away from system after filter screen, by crystal, and remaining clear liquid flows to municipal sewage pipe network.If water
It increases sharply or pretreatment pool catastrophic failure, sewage is directly entered run-off and flows to municipal sewage pipe network through connecting tube.
Step 3, setting sludge clearing and crystal return period are 180 days, and when sludge clearing first will be on suspended sludge layer
Layer sewage is evacuated to run-off by sewage emptying reserved opening, is manually entered multifunctional examining well, is drawn clearly by drawing mouth progress machinery clearly,
Crystal is collected by crystal recovery port, and drawing clearly can be according to specific actual conditions appropriate adjustment with return period.
The method that the present invention is to provide a kind of to recycle nitrogen phosphorus from septic tank wastewater, has the advantages that following 5.
(1) solve that septic tank is in the form of a single, the not high problem for the treatment of effeciency is, it can be achieved that synchronous denitrification dephosphorizing.
(2) by the Real-Time Control Strategy based on pH value, simultaneously stable crystalline process may be implemented, be conducive to ammonium magnesium phosphate crystal
Recycling.
(3) sludge yield is low, saves Treatment of Sludge expense.
(4) multiple effect of sewage treatment and sludge, sewage while resource utilization can be achieved.
(5) the nitrogen phosphorus being effectively reduced into sewage treatment plant handles load, is conducive to the comprehensive utilization of sewage plant carbon source, mentions
High water treatment effect.
Detailed description of the invention
Fig. 1 is the integrated apparatus combination diagram that nitrogen phosphorus is recycled from septic tank wastewater, and Fig. 2 is pretreatment pool signal
Figure, Fig. 3 are multifunctional examining well schematic diagram.
In Fig. 1: 1- run-off, 2- grid, the gas outlet 3-, 4- sludge blanket, 5- ladder, between the small-sized dosing of 6-, 7- crystal is returned
It closes up, 8- connecting tube, 9- strainer, 10- pretreatment pool outlet pipe (crystallization reaction pond water inlet pipe), 11- filtrate (light ceramic) layer,
12- crystallization reaction pond, 13- system outlet canal, 14- check-valves, 15- sewage empty reserved opening, 16-pH real-time monitoring meter, 17- dirt
Mud draws clearly mouth, 18- weir.
The device that nitrogen phosphorus is recycled from septic tank wastewater, by run-off, pretreatment pool, multifunctional examining well and crystallization reaction
Four part of pond is composed, wherein run-off and multifunctional examining well belong to support Unit, and pretreatment pool and crystallization reaction pond are
Main body reaction member.Ammonia nitrogen is discharged after reaction and phosphorus concentration is substantially reduced, and has ammoniomagnesium phosphate crystal raw in crystallization recycling collection port
At, meanwhile, sludge and crystallized product are transported outward from multifunctional examining well, while sewage and sludge are jointly processed by, can also be recycled
Nitrogen-and Phosphorus-containing innoxious slow release fertilizer abundant.
The device of nitrogen phosphorus is recycled from septic tank wastewater, filtrate selected by filter material layer 11 is light ceramic, the correlation of the filler
Feature are as follows: density is small, intensity is high, water absorption rate is big, heat preservation, durable, heat resistanceheat resistant etc., density 300-500kg/m3, raw material is easy to get；
When water is constant, filtrate is in suspended state, is not easy to plug, and can carry out at reinforcing to water quality before entering crystallization reaction
Reason, removes a part of suspended matter and other impurity, is more advantageous to the progress of secondary crystallization reaction, in addition, filtrate also plays adjustment stream
The effect of speed.
Alkalescence condition is more advantageous to the progress of ammoniomagnesium phosphate crystal reaction, and the device 6 setting pH between small-sized dosing are real
When monitoring meter 16, probe gos deep into crystallization reaction pond by filter material layer, and to additional protection of popping one's head in.If pH is slightly lower, take
Enhancements are mixed with magnesium chloride with sodium hydroxide low concentration solution and are added.
Strainer 9 is arranged in water outlet in crystallization reaction pond, and can effectively intercept sediment makes the knot for being separated by solid-liquid separation, avoiding the formation of
Brilliant product is lost with sewage and causes to be difficult to recycle.
Run-off and crystallization reaction pond are interconnected, therefore check-valves 14 is arranged in connecting tube 8, make the sewage in run-off
Keep one-way flow.
Septic tank wastewater water quality is complicated, and it is the fine fack of 50mm that grid 2, which selects spacing, and does anti-corrosion protection processing, useless
Water initially enters system stages and plays initial filter, retains contamination object.
Specific embodiment
The embodiment of the present invention is described in further detail below in conjunction with attached drawing.
In present example, as shown in Figure 1, septic tank wastewater collects into system, the coarse filtration first through grid 2 flows into pre-
Processing pond is fermented by reaction due to anaerobic environment and is generated the gases such as methane, is risen along air chamber wall, and ground gas outlet 3 is reached,
If there is utility value, can also be recycled.Sludge sinks to sludge blanket 4, draws the period clearly with reference to the setting of traditional septic tank and is
180 days, according to specific practical operation situation can appropriate adjustment, sludge is periodically discharged to guarantee volume availability, when sludge is discharged
It carries out machinery by sludge clearing mouth to draw clearly, staff enters multifunctional examining well by ladder 5, draws mouth clearly and is arranged in multifunctional examining
Well is looked into close to pretreatment pool side, is the hole of 50cm × 50cm.Waste water flows into crystallization reaction pond 12 by outlet pipe and continues with,
The sewage of inflow enters crystalline deposit recovery area with the degradation of attached microbial through shutting off for light filter material layer 11, needs at this time
Reach the primary condition of ammoniomagnesium phosphate crystal, if the reading of pH real-time monitoring meter 16 is lower than 7.5, it is necessary to it is molten to add sodium hydroxide
Liquid is to adjust reaction acid-base condition, in addition, 6 should also continue outer plus magnesium source between small-sized dosing, to guarantee the purity of reaction product.
Sewage keeps certain fluidised form flowing reactive in crystallizing pond, and solidliquid mixture flows through strainer 9 and separated, and crystallized product is by recycling
Mouth 7 is collected, and waste water flows to municipal sewage pipe network to system outlet canal 13 through reserved part outside prefabricated crystallizing pond after filter.Such as
The fruit discharge of sewage is increased sharply, and newly run-off 1 is flowed into through weir 18 into sewage, if pretreatment pool breaks down, first by pretreatment pool
Sewage is pumped into run-off through emptying reserved opening 15 above middle sludge suspension layer, is overhauled after sludge clearing, outflow run-off 1
Sewage flows into last system outlet canal 13 through connecting tube 8, and check-valves 14 is provided in connecting tube 8, guarantees sewage one-way flow.
It is process object with certain dependents' district septic tank wastewater, denitrogenation dephosphorizing and the ammonium magnesium phosphate recycling for having investigated this system are special
Property, the removal that ammonia nitrogen and orthophosphates are measured during experiment are all got well than the treatment effect of original septic tank, and removal rate mentions respectively
High by 32% and 51%, crystallized product is ammonium magnesium phosphate through characterization determination, and purity is higher.
The above specific embodiment is not intended to limit the present invention in any form, without departing from recorded in claim
Technical solution under the premise of there are also other variants and remodeling.
Claims (1)
1. a kind of method for recycling nitrogen phosphorus from septic tank wastewater, which comprises the following steps:
Step 1, sewage enter septic tank processing system by user's drainpipe, and the septic tank processing system is by run-off, pre-
Processing pond, multifunctional examining well and crystallization reaction pond are composed；Wherein, the guarantee type that run-off enters system for sewage is constructed
Object, standby pool when also overhauling as pretreatment pool, is connect by outlet pipe with crystallization reaction bottom of pond portion；Pretreatment pool is one
Solid-liquid-gas three phase separate tank, wherein sludge is periodically drawn clearly, and the gas that reaction fermentation generates is discharged or is collected by gas outlet, water outlet
Pipe extends to crystallization reaction pond；
The run-off is the square structure of brick plastering, and bottom has outlet pipe to be connected to system reserved outside crystallization reaction pond
Outlet canal is provided with check-valves on outlet pipe, increases sharply or pretreatment pool burst accident if there is water, run-off rise temporarily into
Weir is arranged with pretreatment pool joining part in water effect；The pretreatment pool divides sludge blanket, gas chamber and three, contraminated zone portion
Point, the gas that gas chamber is collected is discharged or is collected by gas outlet, and sludge is periodically drawn mouth clearly and drawn clearly from reserved, and sewage is by outlet pipe
It flow to crystallization reaction pond to continue with, pretreatment pool water inlet position is provided with grid, it is the thin of 50mm that grid, which selects spacing,
Grid, and do anti-corrosion protection processing；The crystallization reaction pond is made of filtrate filled layer and crystalline deposit Disengagement zone；Described
Multifunctional examining well is equipped between ladder, small-sized dosing, sludge clearing mouth and crystal recycle collection port, it is intended to be taken for other units
Business；
Filtrate in the filtrate filled layer selects light ceramic, density 300-500kg/m3, the filtrate when water is constant
In suspended state；The crystallization reaction pond uses the precast construction of glass reinforced plastic production, is inverted triangle funnel shaped；Described
Quantitative mixed chlorinated magnesium solution adds sodium hydroxide solution periodically to adjust pH value, is used between small-sized dosing to supplement magnesium ion
Sewage to crystalline deposit Disengagement zone generates precipitating, is conducive to recycling；Strainer is arranged in the water outlet in crystallization reaction pond；
Sewage first passes around grid and flows into pretreatment pool, and sludge sinks, and reaction fermentation generates gas and is discharged or recycled by gas outlet,
Sewage supernatant reaches water outlet lowest water level line and enters crystallization reaction pond through pipeline；
Step 2, the sewage into crystallization reaction pond first pass around the degradation of light filter material layer shut off with attached microbial
Crystalline deposit Disengagement zone is flowed to, by adding lye, monitors pH control by pH real-time detection meter in 7.5-9, while every Tiangeng
Magnesium source is supplemented according to discharge of sewage automatic feeding magnesium chloride solution, makes sewage overcurrent in crystalline deposit Disengagement zone, is utmostly formed
Ammonium magnesium phosphate crystal, sewage recycle away from system after filter screen, by crystal, and remaining clear liquid flows to municipal wastewater pipe
Net, if water is increased sharply or pretreatment pool catastrophic failure, sewage are directly entered run-off and flow to municipal sewage pipe network through connecting tube；
Step 3, setting sludge clearing and crystal return period are 180 days, first by the dirt of suspended sludge layer upper layer when sludge clearing
Water is evacuated to run-off by sewage emptying reserved opening, is manually entered multifunctional examining well, is drawn clearly by drawing mouth progress machinery clearly, crystal
It is collected by crystal recycling collection port, periodically slow-release fertilizer use is made in recycling.
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| CN201611162209.3A CN106517667B (en) | 2016-12-15 | 2016-12-15 | A kind of device and method recycling nitrogen phosphorus from septic tank wastewater |
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| CN201611162209.3A CN106517667B (en) | 2016-12-15 | 2016-12-15 | A kind of device and method recycling nitrogen phosphorus from septic tank wastewater |
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| CN110963596A (en) * | 2018-09-29 | 2020-04-07 | 福建申远新材料有限公司 | Dephosphorization reactor for struvite crystallization method and application thereof |
| CN109879562A (en) * | 2019-03-27 | 2019-06-14 | 中节能城市节能研究院有限公司 | A kind of septic tank device for exempting to draw clearly |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811688A (en) * | 2010-05-07 | 2010-08-25 | 华侨大学 | Device and process method for recovering phosphorus from waste water by struvite precipitation method |
| CN204918330U (en) * | 2015-07-07 | 2015-12-30 | 湖南易净环保科技有限公司 | Imitate filtration type glass tempering manure pit by force |
| CN205528106U (en) * | 2016-01-27 | 2016-08-31 | 山东金昊三扬环保机械股份有限公司 | Ammonia nitrogen blows and takes off MAP sediment device |
| CN106145504A (en) * | 2015-04-24 | 2016-11-23 | 中国科学院大学 | A kind of method of phosphorus in rapidly and efficiently synchronization recovery source-separated urine and anaerobic tank anaerobic supernatant |
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2016
- 2016-12-15 CN CN201611162209.3A patent/CN106517667B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101811688A (en) * | 2010-05-07 | 2010-08-25 | 华侨大学 | Device and process method for recovering phosphorus from waste water by struvite precipitation method |
| CN106145504A (en) * | 2015-04-24 | 2016-11-23 | 中国科学院大学 | A kind of method of phosphorus in rapidly and efficiently synchronization recovery source-separated urine and anaerobic tank anaerobic supernatant |
| CN204918330U (en) * | 2015-07-07 | 2015-12-30 | 湖南易净环保科技有限公司 | Imitate filtration type glass tempering manure pit by force |
| CN205528106U (en) * | 2016-01-27 | 2016-08-31 | 山东金昊三扬环保机械股份有限公司 | Ammonia nitrogen blows and takes off MAP sediment device |
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