CN110803794A - Precipitation fine filtration method for sewage treatment - Google Patents
Precipitation fine filtration method for sewage treatment Download PDFInfo
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- CN110803794A CN110803794A CN201910870014.1A CN201910870014A CN110803794A CN 110803794 A CN110803794 A CN 110803794A CN 201910870014 A CN201910870014 A CN 201910870014A CN 110803794 A CN110803794 A CN 110803794A
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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
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/481—Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/763—Devices for the addition of such compounds in gaseous form
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a precipitation and fine filtration method for sewage treatment, which comprises the steps of filtering sewage, putting the filtered sewage into a precipitation tank for precipitation, putting the precipitated sewage into a filter material filter for filtration, softening the precipitated sewage by a softening filter, and adding an additive. The problem that a traditional sewage treatment system needs to be filtered through a plurality of filtering devices, the construction cost is high, meanwhile, the construction needs a large site, when 70% of supernatant is extracted, the burden of workers is small, the treatment frequency is reduced, but the treatment effect on water quality is the worst, when 30% of supernatant is extracted, the sewage after subsequent treatment can reach the standard of direct discharge, but the single treatment amount is small, the workload of equipment maintenance and workers is increased, a sewage plant can select different treatment methods to treat according to the water quality of the discharged sewage, and the pertinence of sewage treatment is also improved.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a precipitation fine filtration method for sewage treatment.
Background
At present, the urban sewage treatment rate is low, the environmental pollution pressure is large, but most of the existing treatment technologies face the problem of high capital investment, low-energy-consumption and ecological sewage treatment technologies are urgently needed at present, and the urban sewage discharge amount in China is continuously increased along with the improvement of the living standard of people and the increasing speed of urbanization. The treatment of water pollution is mainly controlled from industrial point sources, and gradually changed into the control treatment mainly for urban domestic sewage pollution, in recent years, the discharge amount of urban domestic sewage and industrial wastewater is increased year by year, nitrogen and phosphorus exceed standards, and organic matters are randomly discharged to cause serious pollution to the water supply environment, which becomes a prominent problem for restricting economic development seriously. And the energy conservation and emission reduction can be achieved to a new friendly society.
However, a large amount of capital and equipment are required to be consumed to establish a complete and efficient sewage treatment system in a factory, most factories discharge sewage by simple neutralization treatment, and the water supply environment is seriously polluted, however, the sewage treatment cost is also a great problem, and the sewage and wastewater are treated well and the pollution to the environment is minimized, so that the sewage must be treated in the most economical way, and therefore, a precipitation and fine filtration method for sewage treatment is required to be provided to solve the problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and solves the problems that a whole set of sewage treatment system provided by the background art needs a large floor area, so that the sewage treatment load in a unit area is large, the treatment effect is influenced even if the sewage treatment system runs under a high load for a long time, a large amount of capital and equipment are consumed when a set of complete and efficient sewage treatment system is established in a factory, most factories discharge sewage by simple neutralization treatment, and the water supply environment is seriously polluted.
In order to achieve the purpose, the invention provides the following technical scheme: the precipitation fine filtration method for sewage treatment comprises the steps of filtering sewage, putting the filtered sewage into a precipitation tank for precipitation, putting the precipitated sewage into a filter material filter tank for filtration, softening the sewage by a softening filter, and adding an additive, and specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 30-70% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, introducing the filtered supernatant into a softening filter for softening, removing scale ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding a floc scaling modifier and an oxidant into the adjusted clean water, and putting the modified clean water into a fine filter for fine filtration.
Preferably, the sedimentation tank adopts a honeycomb inclined plate as a filler.
Preferably, the three-layer filtering tank is divided into an upper layer structure and a lower layer structure;
wherein, the upper strata is anthracite, and the quartz sand layer has been laid to anthracite layer bottom, and magnetite layer has been laid to quartz sand layer bottom, and magnetite layer bottom has erect the support bracket, and sewage sees through the support bracket and goes out water after the three-layer filtration.
Preferably, the softening hardness in the second step is 170mg/L to 450 mg/L.
Preferably, the additive ph regulator in step three is one or more of lime, sulfuric acid, sodium hydroxide and sodium carbonate.
Preferably, the floc structure modifier in the fourth step is one or more of active silicic acid and clay.
Preferably, the oxidant in the fourth step can be one or more of chlorine, sodium hypochlorite and ozone.
Preferably, the fine filter in the fourth step is an R-type rotary drum type fine filter.
Compared with the prior art, the invention has the beneficial effects that: this sewage treatment is with deposiing essence method of straining, it need filter through multichannel filtration equipment to have remedied sewage treatment system in the past, the construction cost is high, the big problem in place is needed in the construction simultaneously, when extracting 70% supernatant, staff's burden is little, the treatment frequency has been reduced, but the treatment effect to quality of water is the worst, and when extracting 30% supernatant, sewage after the subsequent processing can reach the standard of direct emission, but the single treatment capacity is little, the work burden of equipment maintenance and staff has been increased, the mill can select different processing methods to handle according to the quality of water of discharge sewage, the pertinence of sewage treatment has also been promoted.
The sewage treatment system has the advantages that excessive equipment does not need to be built, requirements on equipment and sites of a factory are reduced, the quality of sewage discharged by the factory is effectively optimized, the discharged sewage does not affect the environment, the burden on nearby sewage plants is reduced, the sewage discharged by the factory can be automatically treated in the factory, on one hand, the built factory can form a set of complete sewage treatment system, on the other hand, the floor area of the factory can be reduced for a newly-built factory, a large amount of area is not needed to be spent on building the complete sewage treatment system, the cost of the factory is reduced, and the convenience of sewage treatment is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention will be explained in more detail below with reference to specific examples:
the precipitation fine filtration method for sewage treatment comprises the steps of filtering sewage, putting the filtered sewage into a precipitation tank for precipitation, putting the precipitated sewage into a filter material filter tank for filtration, softening the sewage by a softening filter, and adding an additive, and specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 30-70% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, introducing the filtered supernatant into a softening filter for softening, removing scale ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding a floc scaling modifier and an oxidant into the adjusted clean water, and putting the modified clean water into a fine filter for fine filtration.
The sedimentation tank adopts a honeycomb inclined plate as a filler, and is mainly used for intercepting floating objects and coarse suspended matters in sewage, such as fibers, broken peels, hair, wood chips, fruit peels, vegetables, plastic products and the like, so that the treatment load of a subsequent treatment structure is reduced.
Wherein, the three-layer filtering tank is divided into an upper layer structure and a lower layer structure;
wherein, the upper strata is anthracite, and the quartz sand layer has been laid to anthracite layer bottom, and magnetite layer has been laid to quartz sand layer bottom, and magnetite layer bottom has erect the support bracket, and sewage sees through the support bracket and goes out water after the three-layer filtration.
Wherein the softening hardness in the second step is 170-450 mg/L, so that the softened water quality can reach the drinking water hardness standard.
The additive ph regulator in the third step is one or more of lime, sulfuric acid, sodium hydroxide and sodium carbonate, and the discharged sewage is ensured not to be corrosive and not to pollute soil and rivers by regulating the ph value of the sewage.
Wherein, the floc structure modifier in the fourth step is one or more of active silicic acid and clay, and the floc in the sewage is adhered together to ensure that the floc is convenient to clean and is convenient to clean after being discharged.
Wherein, the oxidant in the fourth step can be one or more of chlorine, sodium hypochlorite and ozone.
Wherein, the fine filter in the fourth step is an R-type rotary drum type fine filter.
Example 1
A precipitation fine filtration method for sewage treatment specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 30% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, softening the supernatant in a softening filter after filtering until the hardness is 170mg/L, removing scaling ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding lime, sulfuric acid, sodium hydroxide and ozone into the adjusted clean water, and fine filtering the improved clean water in a fine filter.
After detection and subsequent softening ph adjustment by extracting the supernatant 30 percent of clear liquid, the water quality is clear, the hardness standard reaches the standard, and flocculate is screened out to reach the standard of direct discharge.
Example 2
A precipitation fine filtration method for sewage treatment specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 40% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, softening the supernatant in a softening filter after filtering until the hardness is 290mg/L, removing scaling ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding sodium hydroxide and sodium carbonate into the adjusted clear water, and putting the improved clear water into a fine filter for fine filtration.
After detection and subsequent softening ph adjustment by extracting the upper layer of clear liquid with the concentration of 40 percent, the water quality is clear, the hardness standard reaches the standard, and the water quality reaches the standard of being discharged into rivers.
Example 3
A precipitation fine filtration method for sewage treatment specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 50% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, softening the supernatant in a softening filter after filtering until the hardness is 340mg/L, removing scaling ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding sodium hydroxide and sodium carbonate into the adjusted clear water, and putting the improved clear water into a fine filter for fine filtration.
After detection and subsequent softening ph adjustment by extracting 50% of supernatant, the water quality is clear, the hardness standard reaches the standard, and the water quality reaches the standard of being discharged into rivers.
Example 4
A precipitation fine filtration method for sewage treatment specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 60% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, softening the supernatant in a softening filter after filtering until the hardness is 390mg/L, removing scaling ions in water and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding sodium hydroxide and sodium carbonate into the adjusted clear water, and putting the improved clear water into a fine filter for fine filtration.
After detection and subsequent softening ph adjustment of the upper 60% clear liquid, the water quality is clear, the hardness standard reaches the standard, and the water quality has less pollution to the environment after being discharged.
Example 5
A precipitation fine filtration method for sewage treatment specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 70% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, softening the supernatant in a softening filter after filtering until the hardness is 450mg/L, removing scaling ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding sodium hydroxide and sodium carbonate into the adjusted clear water, and putting the improved clear water into a fine filter for fine filtration.
After detection and subsequent softening ph adjustment by extracting 70% of the supernatant, the water quality is clear, the hardness standard is close to the standard, the water quality is less polluted after being discharged, and the treatment effect is similar to that of the third embodiment.
Comparing the first, second, third, fourth and fifth embodiments to obtain the conclusion;
the five embodiments can effectively precipitate and finely filter the sewage without constructing a large batch of sewage treatment equipment, but the proportion of supernatant liquid in the extraction sedimentation tank has larger influence on the softening of subsequent sewage and the subsequent treatment, when 60% or 70% of supernatant liquid is extracted, the treatment result is closer, but the treatment efficiency is high when 70% of supernatant liquid is extracted, the burden of workers is small, the treatment frequency is reduced, but the treatment effect on the water quality is the worst, when 30% of supernatant liquid is extracted, the sewage after the subsequent treatment can reach the standard of direct discharge, but the single treatment amount is small, the equipment maintenance and the workload of the workers are increased, the treatment results in the second embodiment and the third embodiment are similar, but the treatment efficiency in the third embodiment is higher, comprehensively, the third embodiment is selected for popularization, the sewage treatment cost is reduced, the method has the advantages that the sedimentation and fine filtration are carried out on the sewage, the pollution of the sewage to the water environment is reduced, the sedimentation and fine filtration method is adopted, excessive equipment does not need to be built, the requirements on equipment and sites of a factory are reduced, the quality of the sewage discharged by the factory is effectively optimized, the burden on nearby sewage plants is reduced while the discharged sewage does not influence the environment, the sewage discharged by the factory can be automatically treated in the factory, on one hand, the built factory can form a set of complete sewage treatment system, on the other hand, the floor area of the factory can be reduced for a newly-built factory, a large amount of area is not needed to be spent for building the complete sewage treatment system, the cost of the factory is reduced, and the convenience of sewage treatment is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. A precipitation fine filtration method for sewage treatment is characterized in that: the precipitation fine filtration method for sewage treatment comprises the steps of filtering sewage, putting the filtered sewage into a precipitation tank for precipitation, putting the precipitated sewage into a filter material filter tank for filtration, softening the sewage by a softening filter, and adding an additive, and specifically comprises the following steps:
firstly, primarily filtering sewage through a grid filter screen, then placing the sewage into a sedimentation tank for sedimentation for 3 hours, and extracting 30-70% of supernatant after sedimentation and placing the supernatant into a filter material tank;
step two; filtering the supernatant in a three-layer filtering tank by using a filter material, introducing the filtered supernatant into a softening filter for softening, removing scale ions in water, and adding an additive;
step three; detecting the ph value of the clean water after fine filtration by a ph detector, and adding a corresponding ph regulator to adjust the ph value of the standard water quality;
step four; adding a floc scaling modifier and an oxidant into the adjusted clean water, and putting the modified clean water into a fine filter for fine filtration.
2. The method for precipitation fine filtration of sewage treatment as claimed in claim 1, wherein: the sedimentation tank adopts a honeycomb sloping plate as a filler.
3. The method for precipitation fine filtration of sewage treatment as claimed in claim 1, wherein: the three-layer filtering tank is divided into an upper layer structure and a lower layer structure;
wherein, the upper strata is anthracite, and the quartz sand layer has been laid to anthracite layer bottom, and magnetite layer has been laid to quartz sand layer bottom, and magnetite layer bottom has erect the support bracket, and sewage sees through the support bracket and goes out water after the three-layer filtration.
4. The method for precipitation and fine filtration of sewage treatment as claimed in claim 2, wherein: the softening hardness in the second step is 170 mg/L-450 mg/L.
5. The method for precipitation fine filtration of sewage treatment as claimed in claim 1, wherein: and the additive ph regulator in the third step is one or more of lime, sulfuric acid, sodium hydroxide and sodium carbonate.
6. The method for precipitation and fine filtration of sewage treatment as claimed in claim 2, wherein: and the floc structure modifier in the fourth step is one or more of active silicic acid and clay.
7. The method for precipitation fine filtration of sewage treatment as claimed in claim 1, wherein: the oxidant in the fourth step can be one or more of chlorine, sodium hypochlorite and ozone.
8. The method for precipitation fine filtration of sewage treatment as claimed in claim 1, wherein: and the fine filter in the fourth step is an R-type rotary drum type fine filter.
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| CN201910870014.1A CN110803794A (en) | 2019-09-16 | 2019-09-16 | Precipitation fine filtration method for sewage treatment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113230207A (en) * | 2021-04-16 | 2021-08-10 | 江苏意诺飞生物科技有限公司 | Preparation process of calcium gluconate and sodium chloride injection |
| CN113638356A (en) * | 2021-08-16 | 2021-11-12 | 烟台大学 | System and method for simulating urban river ecological restoration |
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| CN113638356B (en) * | 2021-08-16 | 2022-12-30 | 烟台大学 | System and method for simulating urban river ecological restoration |
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