CN109867404A - Domestic sewage treatment process - Google Patents
Domestic sewage treatment process Download PDFInfo
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- CN109867404A CN109867404A CN201711257811.XA CN201711257811A CN109867404A CN 109867404 A CN109867404 A CN 109867404A CN 201711257811 A CN201711257811 A CN 201711257811A CN 109867404 A CN109867404 A CN 109867404A
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Abstract
The invention discloses a kind of domestic sewage treatment process, comprising the following steps: carries out coarse filtration Step 1: sewage is passed through in well strainer；Step 2: the sewage in step 1 is passed through flocculation tank, flocculant is added into flocculation tank, supernatant flows into electrostatic reaction tank after waste water flows into primary sedimentation tank；Step 3: flowing into anaerobic reation pool through electrostatic reaction tank treated sewage, waste water flows into secondary settling tank, and the supernatant after sedimentation in secondary sedimentation tank flows into ultrafilter, and sludge is discharged into sludge recovery pond；Step 4: through ultrafilter treated sewage direct emission or access domestic water line.Domestic sewage processing system maintenance cost of the invention is low, granule foreign, organic matter, the nitrogen phosphorus compound in sewage can be effectively removed, treated sanitary wastewater is not into being capable of qualified discharge, and it can directly be used as domestic water, it can be used in producing biogas after the unified recycling of the sludge of sludge recovery pond recycling, realize maximally utilizing for the energy.
Description
Technical field
The present invention relates to technical field of sewage, and in particular to a kind of domestic sewage treatment process.
Background technique
With the rapid development of our country's economy and the increasingly raising of living standards of the people, sanitary sewage discharge amount substantially increase
It is more.A large amount of landfill leachate, excreta, the discharge of slurry and the expansion of industrial production scale, directly contribute city
The discharge amount of sewage increases substantially, and for rural area, lacks perfect effluent outfall, the life that residential households generate is dirty
The most direct emission of water, due to containing a large amount of nitrogenous compound and phosphorus-containing compound in sewage, sewage direct emission is easy to make
At soil hardening and direct polluted underground water, the vicious circle of water quality, the health of rigid resident are caused.
Summary of the invention
Technical problem to be solved by the invention is to provide domestic sewage treatment process, it can solve in the prior art
Rural domestic sewage treatment facility it is not perfect, sewage discharge quality problem not up to standard.
To solve the above-mentioned problems, the invention adopts the following technical scheme:
The present invention provides a kind of domestic sewage treatment process, comprising the following steps:
Coarse filtration is carried out Step 1: sewage is passed through in well strainer, removes the big partial size impurity in sewage；
Step 2: the sewage in step 1 is passed through flocculation tank, flocculant is added into flocculation tank, when reacting one section
Between after, waste water flows into primary sedimentation tank, and supernatant after primary sedimentation tank precipitates flows into electrostatic reaction tank, and sludge is discharged into sludge recovery pond；
Step 3: flowing into anaerobic reation pool through electrostatic reaction tank treated sewage, after reacting a period of time, it is heavy that waste water flows into two
Pond, the supernatant after sedimentation in secondary sedimentation tank flow into ultrafilter, and sludge is discharged into sludge recovery pond；
Step 4: through ultrafilter treated sewage direct emission or access domestic water line.
Preferred technical solution, is equipped with circulating line between the flocculation tank and electrostatic reaction tank, sewage is flocculating
It reacts primary in reaction tank and electrostatic reaction tank or circular response is multiple.
Preferred technical solution, the flocculant in the flocculation tank is aluminium chloride, ferric sulfate, any in iron chloride
A kind of or their mixing.
Preferred technical solution, the pH in the flocculation tank are 6-9, residence time of the sewage in flocculation tank
It is 15-30 minutes.
Preferred technical solution, the residence time of sewage is 20-30 minutes in the primary sedimentation tank, sewage in the secondary settling tank
Residence time be 20-30 minutes.
Preferred technical solution, the filter core of the ultrafilter are external compression type hollow fiber ultrafiltration membrane.
Preferred technical solution, the material of the hollow fiber ultrafiltration membrane are polyether sulfone or polytetrafluoroethylene (PTFE).
In addition, the present invention also provides a kind of domestic sewage processing system, including set gradually well strainer, flocculation
Reaction tank, primary sedimentation tank, electrostatic reaction tank, anaerobic reation pool, secondary settling tank, ultrafilter, the primary sedimentation tank, secondary settling tank connection are dirty
Mud recovery pond；The flocculation tank includes reaction pond body, and wastewater inlet pipe, stirring are successively arranged at the top of the reaction pond body
Motor, chemical feed pipe, the stirring motor connect agitating shaft, and agitating shaft runs through the inside for protruding into reaction pond body, the flocculation reaction
The bottom in pond is equipped with drainpipe, and the drainpipe connects the primary sedimentation tank；
Preferred technical solution, the primary sedimentation tank is interior to be equipped with strainer, and the primary sedimentation tank is from top to bottom divided into clear water by the strainer
Chamber and mud chamber, the clear water chamber connect the electrostatic reaction tank, and the bottom of the mud chamber connects sludge bucket, the sludge bucket
Connect the sludge recovery pond.
Preferred technical solution, the electrostatic reaction tank includes reaction chamber, is inhaled in institute's reaction chamber at least provided with one group of electrostatic
Attached plate, one group of electrostatic attraction board include a positive plate and a negative plate, the positive plate of every group of electrostatic attraction board with bear
Adsorption layer is equipped between pole plate, the material of the adsorption layer is the mixture of resin, active carbon.
The side wall of preferred technical solution, the electrostatic reaction tank is equipped with outlet pipe and circulating water pipe, the circulating water pipe
The wastewater inlet pipe of the flocculation tank is connected, the circulating water pipe is equipped with the first on-off valve, and the outlet pipe connects institute
Secondary settling tank is stated, the outlet pipe is equipped with the second on-off valve.
It is convenient that domestic sewage treatment process of the invention is run, and maintenance cost is low, can effectively remove in sanitary sewage
Granule foreign, organic matter, nitrogen phosphorus compound, treated sanitary wastewater not into can qualified discharge, and can be as life
It is directly used with water, has saved water resource, reduce the discharge of sewage；It can after the unified recycling of the sludge of sludge recovery pond recycling
For producing biogas, maximally utilizing for the energy is realized.
Detailed description of the invention
Invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of domestic sewage processing system of the present invention；
Fig. 2 is the structural schematic diagram of flocculation tank in domestic sewage processing system of the present invention；
Fig. 3 is the structural schematic diagram of primary sedimentation tank in domestic sewage processing system of the present invention；
Fig. 4 is the structural schematic diagram of electrostatic reaction tank in domestic sewage processing system of the present invention.
Wherein, appended drawing reference is described as follows: well strainer 1, flocculation tank 2, primary sedimentation tank 3, electrostatic reaction tank
4, anaerobic reation pool 5, secondary settling tank 6, ultrafilter 7, sludge recovery pond 8, circulating water pipe 9, reaction pond body 10, wastewater inlet pipe
11, stirring motor 12, chemical feed pipe 13, agitating shaft 14, drainpipe 15, strainer 16, clear water chamber 17, mud chamber 18, sludge bucket 19,
One on-off valve 20, outlet pipe 21, the second on-off valve 22, reaction chamber 23, positive plate 24, negative plate 25, adsorption layer 26.
Specific embodiment
As shown in Figure 1, a kind of domestic sewage processing system, including set gradually well strainer 1, flocculation tank 2,
Primary sedimentation tank 3, electrostatic reaction tank 4, anaerobic reation pool 5, secondary settling tank 6, ultrafilter 7, primary sedimentation tank 3, secondary settling tank 6 connect sludge and return
Receives pond 8, flocculation tank 2 connect electrostatic reaction tank 4 by circulating water pipe 9.The filter core of ultrafilter 7 is the hollow fibre of external-compression type
Tie up ultrafiltration membrane.The material of hollow fiber ultrafiltration membrane is polyether sulfone or polytetrafluoroethylene (PTFE).
As shown in Fig. 2, flocculation tank 2 includes reaction pond body 10, the top of reaction pond body 10 is successively arranged influent waste water
Pipe 11, stirring motor 12, chemical feed pipe 13, stirring motor 12 connect agitating shaft 14, and agitating shaft 14, which runs through, protrudes into reaction pond body 10
Inside, the bottom of flocculation tank 2 are equipped with drainpipe 15, and drainpipe 15 connects primary sedimentation tank 3.Flocculant in flocculation tank 2
For the mixture in aluminium chloride, ferric sulfate, iron chloride.Flocculation tank 2 connects pH regulating device, the pH in flocculation tank 2
It is 8.
As shown in figure 3, being equipped with strainer 16 in primary sedimentation tank 3, primary sedimentation tank 3 is from top to bottom divided into clear water chamber 17 and dirt by strainer 16
Mud chamber 18, clear water chamber 17 connect electrostatic reaction tank 4, and the bottom of mud chamber 18 connects sludge bucket 19, and sludge bucket 19 connects sludge and returns
Receives pond 8.
As shown in figure 4, electrostatic reaction tank 4 includes reaction chamber 23, at least provided with one group of electrostatic attraction board in institute's reaction chamber 23,
One group of electrostatic attraction board includes a positive plate 24 and a negative plate 25, the positive plate 24 and negative plate 25 of every group of electrostatic attraction board it
Between be equipped with adsorption layer 26, the material of adsorption layer 26 is the mixture of resin, active carbon.The side wall of electrostatic reaction tank 4 is equipped with water outlet
Pipe 21 and circulating water pipe 9, circulating water pipe 9 connect the wastewater inlet pipe 11 of flocculation tank 2, and it is logical that circulating water pipe 9 is equipped with first
Disconnected valve 20, outlet pipe 21 connect secondary settling tank 6, and outlet pipe 21 is equipped with the second on-off valve 22.
A kind of domestic sewage treatment process, using above-mentioned domestic sewage processing system, comprising the following steps:
Coarse filtration is carried out Step 1: sewage is passed through in well strainer 1, removes the big partial size impurity in sewage；
Step 2: the sewage in step 1 is passed through flocculation tank 2, flocculant is added into flocculation tank 2, reacts one section
After time, waste water flows into primary sedimentation tank 3, and the supernatant after the precipitating of primary sedimentation tank 3 flows into electrostatic reaction tank 4, and sludge is discharged into sludge and returns
Receives pond 8；
Step 3: flowing into anaerobic reation pool 5 through treated the sewage of electrostatic reaction tank 4, after reacting a period of time, waste water flows into two
Heavy pond 6, the supernatant after the precipitating of secondary settling tank 6 flow into ultrafilter 7, and sludge is discharged into sludge recovery pond 8；
Step 4: through treated the sewage direct emission of ultrafilter 7 or access domestic water line.
Wherein, circulating line is equipped between flocculation tank 2 and electrostatic reaction tank 4, according to the water quality situation of sewage, control
Sewage reacts primary in flocculation tank 2 and electrostatic reaction tank 4 or circular response is multiple.Sewage is in flocculation tank 2
Residence time is 25 minutes.The residence time of sewage is 25 minutes in primary sedimentation tank 3, and the residence time of sewage is 25 in secondary settling tank 6
Minute.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (7)
1. a kind of domestic sewage treatment process, which comprises the following steps:
Coarse filtration is carried out Step 1: sewage is passed through in well strainer, removes the big partial size impurity in sewage；
Step 2: the sewage in step 1 is passed through flocculation tank, flocculant is added into flocculation tank, when reacting one section
Between after, waste water flows into primary sedimentation tank, and supernatant after primary sedimentation tank precipitates flows into electrostatic reaction tank, and sludge is discharged into sludge recovery pond；
Step 3: flowing into anaerobic reation pool through electrostatic reaction tank treated sewage, after reacting a period of time, it is heavy that waste water flows into two
Pond, the supernatant after sedimentation in secondary sedimentation tank flow into ultrafilter, and sludge is discharged into sludge recovery pond；
Step 4: through ultrafilter treated sewage direct emission or access domestic water line.
2. a kind of domestic sewage treatment process as described in claim 1, it is characterised in that: the flocculation tank and electrostatic are anti-
Circulating line is equipped between Ying Chi, sewage reacts primary in flocculation tank and electrostatic reaction tank or circular response is multiple.
3. a kind of domestic sewage treatment process as described in claim 1, it is characterised in that: the flocculation in the flocculation tank
Agent is the mixing of aluminium chloride, ferric sulfate, any one or they in iron chloride.
4. a kind of domestic sewage treatment process as claimed in claim 3, it is characterised in that: the pH in the flocculation tank is
6-9, residence time of the sewage in flocculation tank are 15-30 minutes.
5. a kind of domestic sewage treatment process as described in claim 1, it is characterised in that: the stop of sewage in the primary sedimentation tank
Time is 20-30 minutes, and the residence time of sewage is 20-30 minutes in the secondary settling tank.
6. a kind of domestic sewage treatment process as described in claim 1, it is characterised in that: the filter core of the ultrafilter is
External compression type hollow fiber ultrafiltration membrane.
7. a kind of domestic sewage processing system as claimed in claim 6, it is characterised in that: the material of the hollow fiber ultrafiltration membrane
Material is polyether sulfone or polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711257811.XA CN109867404A (en) | 2017-12-04 | 2017-12-04 | Domestic sewage treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711257811.XA CN109867404A (en) | 2017-12-04 | 2017-12-04 | Domestic sewage treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109867404A true CN109867404A (en) | 2019-06-11 |
Family
ID=66914372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711257811.XA Pending CN109867404A (en) | 2017-12-04 | 2017-12-04 | Domestic sewage treatment process |
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| CN (1) | CN109867404A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2187461C2 (en) * | 2000-04-14 | 2002-08-20 | Волгоградский государственный технический университет | Method of water treatment |
| CN105948382A (en) * | 2016-05-12 | 2016-09-21 | 安徽国能亿盛环保科技有限公司 | Domestic sewage treatment process |
| CN205616706U (en) * | 2016-05-18 | 2016-10-05 | 温州腾骄环保科技有限公司 | Chemistry sewage treatment plant |
-
2017
- 2017-12-04 CN CN201711257811.XA patent/CN109867404A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2187461C2 (en) * | 2000-04-14 | 2002-08-20 | Волгоградский государственный технический университет | Method of water treatment |
| CN105948382A (en) * | 2016-05-12 | 2016-09-21 | 安徽国能亿盛环保科技有限公司 | Domestic sewage treatment process |
| CN205616706U (en) * | 2016-05-18 | 2016-10-05 | 温州腾骄环保科技有限公司 | Chemistry sewage treatment plant |
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Application publication date: 20190611 |
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