CN109354316A - A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water - Google Patents
A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water Download PDFInfo
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- CN109354316A CN109354316A CN201811390174.8A CN201811390174A CN109354316A CN 109354316 A CN109354316 A CN 109354316A CN 201811390174 A CN201811390174 A CN 201811390174A CN 109354316 A CN109354316 A CN 109354316A
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- sewage
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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
-
- 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
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
-
- 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
-
- 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
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a kind of low-temperature wastewater treatment techniques that can reach IV class standard of surface water, belong to technical field of sewage.It solves the problems, such as at present northern China low temp area sewage treatment process is complicated, effluent quality is unstable, effluent quality is not up to standard, at high cost and energy consumption is high.Processing step are as follows: sewage successively flows into anaerobic pond and anoxic pond, then flows into secondary settling tank through one section of aeration tank and two sections of aeration tanks, and IV class standard of surface water is then reached after coagulating sedimentation filters.Activated sludge in the present invention, can be in water temperature 0-15 after domesticationoThere is greater activity in the environment of C, there is good Nitrogen/Phosphorus Removal.Water treatment technology of the present invention is equipped with PLC automatic control system, high degree of automation, adjusting process parameter is simpler, can in the biggish situation of flowed fluctuation well adapting to property, sludge output is few, is particularly suitable for applications in the decentralized type sewage processing plant stand of northern China cold district.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of low-temperature sewage that can reach IV class standard of surface water
Treatment process handles plant stand especially suitable for northern China cold district decentralized type sewage.
Background technique
As China's water pollution problems increasingly highlights, the comprehensive treatment of water environment becomes the important link of environmental area, city
Town sewage qualified discharge is the basis of water environment comprehensive treatment, with the continuous promotion that environmental improvement requires, urban wastewater treatment
The raising of discharge standard has been trend of the times, especially northern China cold district, since the limitation of low temperature leads to biological denitrificaion
Dephosphorization is undesirable, water quality be more difficult it is up to standard, in terms of the requirement that current quality of water environment improves, many municipal sewage plants' processing
Water outlet afterwards is often discharged into river, becomes the water body in river.The existing sewage disposal plant effluent in China, discharge standard refer to more
Level-one A standard in " GB18918-2002 urban wastewater treatment firm pollutant emission standard ", the water discharge of this Effluent criteria
Into the water body environment there are few self-purification capacity, water quality just corresponds to the bad V class water of surface water, most north cold areas
Level-one B standard in discharge standard even " GB18918-2002 urban wastewater treatment firm pollutant emission standard ", leads to water
Body is not repaired not only, is polluted instead, therefore an urgent demand effluent of municipal sewage plant reaches IV class of surface water
Standard.Currently, provincial standard is carried out on the ground such as Beijing, Shanghai and Nanjing, Kunming, Hefei successively, to sewage effluents CODCr, ammonia
The requirement of the indexs such as nitrogen, total nitrogen, total phosphorus has met or exceeded the requirement of IV class standard of surface water.
Summary of the invention
It is limited for defect existing for existing sewage treatment process and in the use of cold district, the present invention is for existing
The deficiency of technology proposes a kind of sewage treatment process, can cold district realize cesspool in microorganism enrichment again by force
Change biological carbon and phosphorous removal, so that sewage effluents index be made to reach IV class standard of surface water, which has environmental benefit and warp
It helps benefit, very good solution sewage treatment bring environmental pollution not up to standard, technique occupied area is small, processing cost is low, band
Economic benefit is carried out.
The present invention adopts the following technical scheme that:
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard, the specific steps are as follows:
(1) low-temperature sewage flows into anaerobic pond after pretreatment, blender is equipped in anaerobic pond, sewage after pretreatment
It is mixed with the returned sludge of sedimentation basin, return sludge ratio control dissolved oxygen in 40%-150%, pond is controlled in 0.1-
0.3mg/L, sludge age were controlled at 5-10 days；
(2) anoxic pond is flowed by anaerobic pond treated sewage, blender is equipped in anoxic pond, after anaerobic pond is handled
Sewage and the mixed liquor of two sections of aeration tanks reflux be mixed, hydraulic detention time 4h is filled out filled with combination in anoxic pond
Material, return current ratio of the mixed liquid control dissolved oxygen control in 150%-400%, pond are controlled in 0.3-0.5mg/L, sludge age in 20-25
It；
(3) aerobic tank is flowed by anoxic pond treated sewage, aerobic tank is divided into one section of aeration tank and two sections of aeration tanks, waterpower
Residence time is 2h；Composite filling, filling proportion 50%-55%, one section of aeration tank and two sections of aeration tanks are filled in aerobic tank
Interior dissolved oxygen is controlled respectively in 2-4mg/L and 5-8mg/L, and one section of aeration tank and two sections of aeration tank sludge age controls were at 25-30 days；
(4) secondary settling tank is flowed into through aerobic tank treated sewage, inclined plate (pipe) sedimentation basin may be selected in hydraulic detention time 2.4h
Or radial-flow sedimentation tank；
(5) coagulative precipitation tank is flowed into through secondary settling tank treated sewage, adds Dephosphorization reagent and coagulation in coagulative precipitation tank domestic demand
Agent, the dosage of inorganic and organic coagulated agent are 10-40mg/L, 1-5mg/L, and the mixed interval time is not less than 30s,
Sedimentation time is 2h；
(6) the sewage inflow filter after coagulating kinetics, filter device use more medium filter, filtered production
Water can reach IV class standard of surface water.
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard of the present invention, the group of the anoxic pond and aerobic tank
It closes and adheres to the cryogenic engineering bacterium through taming on filler, using the dewatered sludge of low temp area sewage treatment plant under this process conditions
Domestication 30 days or more.
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard of the present invention, the anoxic pond and aerobic tank
Filler in (including one section of aeration tank and two sections of aeration tanks) is the semi-soft fiberfill of pencil.
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard of the present invention, the more medium filter filtrate
It preferably uses quartz sand and active carbon to combine, while removing organic matter, coloration and suspended matter.
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard of the present invention is provided with PLC in the technique and controls
System processed, can according to parameters automatically controlled water pumps such as liquid level, the dissolved oxygen concentrations detected, the opening of aerator, stop, realization is set
Standby automatic control.
Key of the invention is by traditional A2The anoxic pond and aerobic tank of/O system are transformed into contact oxidation pond, are lacking
Composite filling is added in oxygen pond and aerobic tank, forms biofilm reactor, in order to improve denitrification ability, is met raw under cryogenic conditions
The effect and stability of object processing, are divided into two sections in oxidation pond, arranged in series.
The beneficial effects of the invention are as follows producing water water quality height, can reach IV class standard of surface water, and high degree of automation adjusts work
Skill parameter is simpler, can in the biggish situation of flowed fluctuation well adapting to property, sludge output is few, is particularly suitable for applications in
The decentralized type sewage of northern China cold district handles plant stand.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Combined with specific embodiments below and attached drawing is described in further details the present invention.
A kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard of the present embodiment, such as Fig. 1, the specific steps are as follows:
(1) low-temperature sewage flows into anaerobic pond after pretreatment, blender is equipped in anaerobic pond, sewage after pretreatment
It is mixed with the returned sludge of sedimentation basin, return sludge ratio control dissolved oxygen in 60%-100%, pond is controlled in 0.1-
0.2mg/L, sludge age were controlled at 5-10 days, phosphorus were mainly discharged in anaerobic pond, while partial organic substances are aoxidized；
(2) anoxic pond is flowed by anaerobic pond treated sewage, blender is equipped in anoxic pond, after anaerobic pond is handled
Sewage and the mixed liquor of two sections of aeration tanks reflux be mixed, hydraulic detention time 4h is filled out filled with combination in anoxic pond
Material, return current ratio of the mixed liquid control dissolved oxygen control in 250%-300%, pond are controlled in 0.3-0.5mg/L, sludge age in 20-25
It, realizes anti-nitration reaction in anoxic pond, reaches the function of denitrogenation；
(3) aerobic tank is flowed by anoxic pond treated sewage, aerobic tank is divided into one section of aeration tank and two sections of aeration tanks, waterpower
Residence time is 2h；Composite filling, filling proportion 50%-55%, one section of aeration tank and two sections of aeration tanks are filled in aerobic tank
Interior dissolved oxygen is controlled respectively in 2-4mg/L and 5-8mg/L, and one section of aeration tank and two sections of aeration tank sludge ages were controlled at 25-30 days,
This three reactions of absorption of removal BOD, nitrification and phosphorus are realized in aerobic tank by aeration；
(4) secondary settling tank is flowed into through aerobic tank treated sewage, inclined plate (pipe) sedimentation basin may be selected in hydraulic detention time 2.4h
Or radial-flow sedimentation tank, the partial concentration of the secondary settling tank interior separation for realizing mixed liquor and sludge；
(5) coagulative precipitation tank is flowed into through secondary settling tank treated sewage, adds Dephosphorization reagent and coagulation in coagulative precipitation tank domestic demand
Agent, the dosage of inorganic and organic coagulated agent are 20-40mg/L, 1-3mg/L, and the mixed interval time is not less than 30s,
Sedimentation time is 2h, by addition chemical dephosphorization medicament and organic and inorganic coagulant in coagulative precipitation tank, reaches dephosphorization and goes
Except the organic and inorganic pollution in sewage being in colloid and small state；
(6) the sewage inflow filter after coagulating kinetics, filter device use more medium filter, filtered production
Water can reach IV class standard of surface water.
Adhere to the cryogenic engineering bacterium through taming in the present embodiment on the composite filling of anoxic pond and aerobic tank, using Inner Mongol
The dewatered sludge of sewage treatment plant of area is tamed 30 days or more under this process conditions.Filler is the semi-soft fiberfill of pencil.
More medium filter filtrate preferably uses quartz sand and active carbon to combine in this hair embodiment, at the same remove organic matter,
Coloration and suspended matter.
It is provided with PLC control system in the present embodiment, can be controlled automatically according to parameters such as liquid level, the dissolved oxygen concentrations detected
Water pump processed, aerator open, stop, and realize the automatic control of equipment.
Above content is only technical solution of the present invention is described in detail, but not limit protection of the invention
Range, the modify or supplement or improvement and modification that specific example described in affiliated those skilled in the art is done, only
It should belong to claim of the invention without departing from the structure or beyond the scope defined by this claim of invention and protect
Within the scope of shield.
Claims (5)
1. a kind of low-temperature wastewater treatment technique that can reach IV class standard of surface water, it is characterised in that the following steps are included:
(1) low-temperature sewage flows into anaerobic pond after pretreatment, blender is equipped in anaerobic pond, sewage after pretreatment
It is mixed with the returned sludge of sedimentation basin, return sludge ratio control dissolved oxygen in 40%-150%, pond is controlled in 0.1-
0.3mg/L, sludge age were controlled at 5-10 days；
(2) anoxic pond is flowed by anaerobic pond treated sewage, blender is equipped in anoxic pond, after anaerobic pond is handled
Sewage and the mixed liquor of two sections of aeration tanks reflux be mixed, hydraulic detention time 4h is filled out filled with combination in anoxic pond
Material, return current ratio of the mixed liquid control dissolved oxygen control in 150%-400%, pond are controlled in 0.3-0.5mg/L, sludge age in 20-25
It；
(3) aerobic tank is flowed by anoxic pond treated sewage, aerobic tank is divided into one section of aeration tank and two sections of aeration tanks, waterpower
Residence time is 2h；Composite filling, filling proportion 50%-55%, one section of aeration tank and two sections of aeration tanks are filled in aerobic tank
Interior dissolved oxygen is controlled respectively in 2-4mg/L and 5-8mg/L, and one section of aeration tank and two sections of aeration tank sludge age controls were at 25-30 days；
(4) secondary settling tank is flowed into through aerobic tank treated sewage, inclined plate (pipe) sedimentation basin may be selected in hydraulic detention time 2.4h
Or radial-flow sedimentation tank；
(5) coagulative precipitation tank is flowed into through secondary settling tank treated sewage, adds Dephosphorization reagent and coagulation in coagulative precipitation tank domestic demand
Agent, the dosage of inorganic and organic coagulated agent are 10-40mg/L, 1-5mg/L, and the mixed interval time is not less than 30s,
Sedimentation time is 2h；
(6) the sewage inflow filter after coagulating kinetics, filter device use more medium filter, filtered production
Water can reach IV class standard of surface water.
2. a kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard according to claim 1, it is characterised in that
Adhere to the cryogenic engineering bacterium through taming on the composite filling of the anoxic pond and aerobic tank, using low temp area sewage treatment plant
Dewatered sludge is tamed 30 days or more under this process conditions.
3. a kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard according to claim 1, it is characterised in that
Filler in the anoxic pond and aerobic tank (including one section of aeration tank and two sections of aeration tanks) is the semi-soft fiberfill of pencil.
4. a kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard according to claim 1, it is characterised in that
The more medium filter filtrate preferably uses quartz sand and active carbon to combine, while removing organic matter, coloration and suspended matter.
5. a kind of low-temperature wastewater treatment technique of IV class standard of surface water up to standard according to claim 1, it is characterised in that
PLC control system is provided in technique, it can be according to the parameters automatically controlled water pumps such as liquid level, the dissolved oxygen concentration detected, aeration
Opening, stopping for equipment, realizes the automatic control of equipment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390174.8A CN109354316A (en) | 2018-11-21 | 2018-11-21 | A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water |
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| CN201811390174.8A CN109354316A (en) | 2018-11-21 | 2018-11-21 | A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111217447A (en) * | 2019-11-29 | 2020-06-02 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
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2018
- 2018-11-21 CN CN201811390174.8A patent/CN109354316A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20050046393A (en) * | 2003-11-14 | 2005-05-18 | 신세계건설(주) | Wastewater treatment plant and method thereof |
| CN103787498A (en) * | 2013-11-03 | 2014-05-14 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN205035217U (en) * | 2015-08-21 | 2016-02-17 | 东莞市科达环保工程有限公司 | Processing system with four types cities and towns sewage treatment surface water up to standard |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111217447A (en) * | 2019-11-29 | 2020-06-02 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
| CN111217447B (en) * | 2019-11-29 | 2022-06-03 | 段林卓 | Process and device for treating sewage of outdoor flush toilet in alpine region |
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Application publication date: 20190219 |