CN107840542B - Sewage treatment method - Google Patents

Sewage treatment method Download PDF

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Publication number
CN107840542B
CN107840542B CN201711232134.6A CN201711232134A CN107840542B CN 107840542 B CN107840542 B CN 107840542B CN 201711232134 A CN201711232134 A CN 201711232134A CN 107840542 B CN107840542 B CN 107840542B
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tank
sewage
biological
treatment
sedimentation
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CN107840542A (en
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罗锋
潘嘉立
莫沛聪
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Dongguan Zhongyuan Environmental Investment Co., Ltd
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Dongguan Zhihui Water Technology Co ltd
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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
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • 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
    • C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • 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
    • C02F3/02—Aerobic processes
    • 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
    • C02F3/28—Anaerobic digestion processes
    • 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
    • C02F3/347—Use of yeasts or fungi
    • 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
    • C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed

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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)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Physical Water Treatments (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention relates to the technical field of sewage treatment, in particular to a treatment method of a sewage treatment system, which comprises a water inlet pipe, a grating machine, a sedimentation tank, an adjusting tank, an anaerobic tank, a first aerobic tank and a second aerobic tank, a first biological tank and a second biological tank, wherein the water inlet pipe is used for leading in sewage for treatment, the grating machine is used for intercepting and removing impurities in the sewage, the sedimentation tank is used for precipitating suspended matters in the sewage, the adjusting tank is used for adjusting the flow and the concentration of the sewage, the anaerobic tank is used for carrying out anaerobic treatment on the sewage, the first aerobic tank and the second aerobic tank are used for decomposing organic matters in the sewage into inorganic matters, the first biological tank; the sewage treatment system and the sewage treatment method can quickly treat the sewage, can be directly used in artificial wetlands or directly discharged to rivers, scenic spots, reservoirs and the like after treatment, and have high treatment efficiency and good treatment effect.

Description

Sewage treatment method
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a treatment method of a sewage treatment system.
Background
With the increase of urban population and the development of industrial and agricultural production, the amount of sewage generated in the production and living process is increasing day by day, and in order to reduce the harm of the sewage to water and environment, the sewage needs to be purified before being released into the environment. The existing sewage treatment system treatment method is mostly composed of a pretreatment system, a biochemical treatment system and a sludge-water separation system, and the biochemical treatment systems are constructed by adopting different process methods, so that the treatment methods of various different types of sewage treatment systems are different in structural forms.
Commonly used are: conventional anaerobic/anoxic/aerobic processes (a/O processes).
Several major municipal sewage treatment processes are as follows:
A/A/O and its improved process, SBR and its modified process and UNITANK process.
However, the existing sewage treatment systems have the same defect, cannot be directly discharged or directly discharged for use after sewage treatment, and have poor treatment efficiency.
Disclosure of Invention
In order to solve the problems, the invention provides the sewage treatment system treatment method which can quickly treat the sewage, can be directly used in artificial wetlands or directly discharged to reservoirs of river scenic spots and the like after treatment, and has high treatment efficiency and good treatment effect.
The technical scheme adopted by the invention is as follows: a treatment method of a sewage treatment system comprises a water inlet pipe for leading in sewage for treatment, a grating machine for intercepting and removing impurities in the sewage, a sedimentation tank for settling suspended matters in the sewage, an adjusting tank for adjusting the flow and concentration of the sewage, an anaerobic tank for carrying out anaerobic treatment on the sewage, a first aerobic tank and a second aerobic tank for decomposing organic matters in the sewage into inorganic matters, a first biological tank and a second biological tank for purifying the sewage, and a disinfection tank for disinfecting the sewage;
the sewage is led into a grating machine from the water inlet pipe, the grating machine is communicated to a sedimentation tank, the sedimentation tank is communicated to an adjusting tank, the adjusting tank is communicated to an anaerobic tank, the anaerobic tank is communicated with a first aerobic tank and a second aerobic tank, and the first aerobic tank is communicated to a first biological tank and a second biological tank; the second aerobic tank is communicated to the disinfection tank.
The grid machine is provided with a water inlet, a water outlet, grid bars and a sterilization assembly, wherein the grid bars are arranged between the water inlet and the water outlet, the sterilization assembly is arranged at the position of the grid bars, the water inlet is connected with a water inlet pipe, and the water outlet is communicated to a sedimentation tank.
The scheme is further improved in that the sterilization component is an ultrasonic sterilization component.
The scheme is further improved in that the adjusting tank comprises a mixing tank and an sedimentation assisting tank, one end of the mixing tank is connected with the sedimentation assisting tank, the other end of the mixing tank is connected with the anaerobic tank, and the sedimentation assisting tank is connected with the sedimentation tank; the sedimentation assisting tank is provided with an S-shaped water channel.
The anaerobic tank is provided with a clapboard to divide the anaerobic tank into three tank bodies, and the three tank bodies are communicated by a gap arranged at the position of the clapboard.
The further improvement of the scheme is that the first biological pond and the second biological pond are both provided with feeding components, and different auxiliary agents are fed into the first biological pond and the second biological pond by the feeding components.
The further improvement of the scheme is that the first biological tank is communicated with a purification tank, the second biological tank is communicated with an artificial wetland, and the artificial wetland is provided with a water outlet communicated to a water inlet pipe.
A treatment method of a sewage treatment system is characterized in that: the method comprises the following steps:
step 1, introducing sewage into a grating machine through a water inlet pipe, and separating sludge and impurities with large particle sizes from the sewage through the grating machine;
step 2, guiding the separated sewage into a sedimentation tank to carry out sedimentation treatment on suspended matters in the sewage;
step 3, leading the sewage from the sedimentation tank into an adjusting tank, and adjusting the flow concentration of the sewage through the adjusting tank;
step 4, the adjusting tank guides the sewage into an anaerobic tank to treat the sewage without oxygen;
step 5, leading the sewage from the anaerobic tank into a first aerobic tank and a second aerobic tank to decompose organic matters in the sewage into inorganic matters;
step 6, after the treatment in the first aerobic tank, the sewage is respectively led into a first biological tank and a second biological tank, a flocculating agent and a coagulant aid are put into the first biological tank, a nutrient auxiliary agent and a curing agent are put into the second biological tank, and after the treatment in the second aerobic tank, the sewage is led out to a disinfection tank for disinfection treatment;
step 7, discharging the water to a purification tank for use after the flocculant and the coagulant aid are added into the first biological tank for treatment, adding the active biological composition agent into the purification tank, and finally discharging the water to a river or a landscape reservoir; the second biological tank discharges water to the artificial wetland for use after nutrient auxiliary agents and curing agents are added; carrying out photocatalytic disinfection on the sewage in the disinfection tank, and discharging the sewage after fine filtration, wherein the sewage can be discharged to a river or a farmland for use;
the scheme is further improved in that in the step 1, sewage is guided into the grating machine from the water inlet by the water inlet pipe, sludge and impurities with larger particle sizes are separated from the sewage by the grating bars, and the sewage is sterilized by the ultrasonic sterilizing component in the separation process;
in the step 3, the residual impurities are sunk into the S-shaped water channel again in the adjusting tank through the settling basin for discharge, and the pollution-free water is placed in the mixing tank to be mixed with the sewage;
in the step 4, the three tank bodies are sequentially treated in the anaerobic tank, and organic matters are hydrolyzed, acidified and methanated under the action of anaerobic bacteria to remove the organic matters in the wastewater;
in the step 5, the sewage treated in the anaerobic tank is detected to have different concentrations, and is selectively guided into the first aerobic tank or the second aerobic tank for use;
in the step 6, when the artificial wetland is introduced into the first aerobic tank, the artificial wetland is selectively introduced into the first biological tank or the second biological tank for use according to the plants of the artificial wetland; when the wastewater is led into a second aerobic tank, the wastewater is subjected to secondary denitrification through nitrification, then is subjected to photocatalytic disinfection through a disinfection tank, and is subjected to fine filtration and then is discharged after reaching the standard;
the scheme is further improved in that in the step 6, the photocatalytic disinfection is to disinfect the sewage through a photocatalytic purification reactor;
the nutrient additive is a composite nutrient additive, and the preparation method comprises the following steps: dissolving chitosan in an acidic aqueous solution to prepare a chitosan-containing solution, so that the chitosan is fully dissolved; adding a ceric ammonium nitrate or ammonium persulfate initiator, adding acrylamide to prepare a chitosan grafted polyacrylamide material, adding isopropanol, and adding a NaOH aqueous solution to prepare a composite nutrient auxiliary agent;
the curing agent consists of tricalcium silicate, dicalcium silicate and tricalcium aluminate;
the active biological composition formula comprises: pediococcus acidilactici, pediococcus pentosaceus, leuconostoc mesenteroides, bacillus subtilis, lactobacillus acidophilus and pichia stipitis;
the concentration of the pediococcus pentosaceus is 6.0x103cfu/gm-7.0x 103 cfu/gm;
the concentration of the leuconostoc mesenteroides is 5.0x101 cfu/gm-6.0 x101 cfu/gm;
the concentration of the bacillus subtilis is 4.0x102cfu/gm-5.0x 102 cfu/gm;
the concentration of the lactobacillus acidophilus is 2.0x101cfu/gm-3.0x 101 cfu/gm;
the concentration of the powdery pichia pastoris is 5.0x100cfu/gm to 7.0x 100 cfu/gm;
the curing agent consists of tricalcium silicate, dicalcium silicate and tricalcium aluminate, and the proportion is 2:3: 3.
The invention has the beneficial effects that:
1. a treatment method of a sewage treatment system is provided with a water inlet pipe for leading in sewage for treatment, a grating machine for intercepting and removing impurities in the sewage, a sedimentation tank for precipitating suspended matters in the sewage, an adjusting tank for adjusting the flow and the concentration of the sewage, an anaerobic tank for carrying out anaerobic treatment on the sewage, a first aerobic tank and a second aerobic tank for decomposing organic matters in the sewage into inorganic matters, a first biological tank and a second biological tank for purifying the sewage, and a disinfection tank for disinfecting the sewage;
the sewage is led into a grating machine from the water inlet pipe, the grating machine is communicated to a sedimentation tank, the sedimentation tank is communicated to an adjusting tank, the adjusting tank is communicated to an anaerobic tank, the anaerobic tank is communicated with a first aerobic tank and a second aerobic tank, and the first aerobic tank is communicated to a first biological tank and a second biological tank; the second aerobic tank is communicated to the disinfection tank.
On one hand, sewage is directly pumped into the grating machine to separate the sewage from the sludge with large particle size, so that the removal time of the sludge with large particle size is saved, the efficiency is improved, on the other hand, some suspended matters (such as garbage, leaves and the like) in the sewage are directly precipitated to the bottom through the sedimentation tank to be discharged, so that the cleaning time of the suspended matters is saved; in the third aspect, the concentration and the flow of the sewage can be directly adjusted through the adjusting tank, and the mixing tank and the sedimentation assisting tank play a certain role in cooperation, so that the subsequent sewage treatment effect is improved, and the treatment efficiency is improved; in the fourth aspect, the anaerobic tank is used for hydrolyzing, acidifying and methanizing organic matters by utilizing the action of anaerobic bacteria, so that the organic matters in the sewage are removed, and the biodegradability of the sewage is improved; in the fifth aspect, redundant organic matters in the sewage can be decomposed into inorganic matters through the first aerobic tank and the second aerobic tank, so that the sewage can be conveniently treated in the subsequent process; in the sixth aspect, after the treatment in the first aerobic tank, the sewage is purified by adding auxiliary agents into the first biological tank and the second biological tank, and then the sewage is selectively discharged; in the seventh aspect, after the treatment in the second aerobic tank, the sewage is transferred to a disinfection tank, and then is subjected to photocatalytic disinfection in the disinfection tank, and is subjected to fine filtration and then is discharged after reaching the standard;
according to the invention, the sewage treatment system can quickly treat the sewage, and the treated sewage can be directly used in artificial wetlands or directly discharged to reservoirs of river scenic spots and the like, so that the treatment efficiency is high and the treatment effect is good.
2. The grating machine is provided with a water inlet, a water outlet, grating strips and a sterilization assembly, the grating strips are arranged between the water inlet and the water outlet, the sterilization assembly is arranged at the positions of the grating strips, the water inlet is connected with a water inlet pipe, the water outlet is communicated to a sedimentation tank, sludge or sundries with large particle sizes and sewage are separated through the grating strips, the sewage is sterilized through the sterilization assembly in the treatment process, and the subsequent treatment of the sewage is conveniently prepared.
3. The sterilization component is an ultrasonic sterilization component, and the sterilization effect of the ultrasonic is mainly caused by the cavitation effect generated by the ultrasonic sterilization component. During ultrasonic treatment, when high-intensity ultrasonic waves propagate in a liquid medium, longitudinal waves are generated, so that regions alternately compressed and expanded are generated, and the regions with changed pressure are easy to cause a cavitation phenomenon and form micro bubble nuclei in the medium. The micro bubble nucleus is in the moment of adiabatic shrinkage and collapse, so that certain bacteria in the liquid are killed, viruses are inactivated, and even cell walls of a small number of microorganisms are damaged, and the preparation for the subsequent sewage treatment is facilitated.
4. The adjusting tank comprises a mixing tank and an sedimentation assisting tank, one end of the mixing tank is connected with the sedimentation assisting tank, the other end of the mixing tank is connected with the anaerobic tank, and the sedimentation assisting tank is connected with the sedimentation tank; the sedimentation assisting tank is provided with an S-shaped water channel, precipitates such as relatively fine impurities in the sewage through the sedimentation assisting tank again, the precipitates are discharged to the S-shaped water channel, then the sewage is mixed with the water in the mixing tank, and the subsequent purification treatment of the sewage can be facilitated after the mixing.
5. The anaerobism pond is equipped with the baffle and separates into three cell body with the anaerobism pond, and three cell body is equipped with the breach intercommunication in the baffle position, can make the time of sewage process longer in the anaerobism pond, and is longer to the sewage treatment time that does not have oxygen, and the effect of utilizing anaerobe that can be better makes the organic matter take place to hydrolyze, acidize and methanation, removes the organic matter in the sewage, improves the biodegradability of sewage.
6. The first biological pond and the second biological pond are both provided with feeding components, the feeding components feed different auxiliaries into the first biological pond and the second biological pond, the different auxiliaries are fed according to the sewage concentration and later-stage use in the biological ponds, the purification treatment of sewage is improved, and the treatment efficiency is high.
7. The first biological pond is communicated with the purification pond, sewage can be completely purified and discharged to a farmland through the purification pond for use, the purification effect is good, the second biological pond is communicated with the constructed wetland, the constructed wetland is provided with a water outlet communicated to a water inlet pipe, the water outlet can be conveniently recycled after the constructed wetland is used, the purification treatment is carried out again, and the waste is avoided due to the recycling.
8. A treatment method of a sewage treatment system comprises the following steps:
step 1, introducing sewage into a grating machine through a water inlet pipe, and separating sludge and impurities with large particle sizes from the sewage through the grating machine; the water inlet pipe guides the sewage into the grating machine from the water inlet, the grid bars separate sludge and sundries with larger particle sizes from the sewage, and the ultrasonic sterilization assembly is used for sterilizing the sewage in the separation process, so that the sterilization effect is good, and the subsequent purification treatment of the sewage is facilitated;
step 2, guiding the separated sewage into a sedimentation tank to carry out sedimentation treatment on suspended matters in the sewage, so that the subsequent sewage treatment can be effectively facilitated, and the purification treatment efficiency is improved;
step 3, leading the sewage into an adjusting tank from a sedimentation tank, adjusting the flow concentration of the sewage through the adjusting tank, sinking the residual impurities into an S-shaped water channel again in the adjusting tank through an auxiliary sedimentation tank for discharge, placing pollution-free water quality in a mixing tank to be mixed with the sewage, reserving a part of the pollution-free water quality in the mixing tank after the treatment in the early stage, mixing the part of the pollution-free water quality with the sewage in the post-treatment, reducing the pollution degree in the sewage after mixing, being convenient for treating the sewage in a wider range and having high treatment efficiency;
step 4, the adjusting tank guides the sewage into an anaerobic tank to treat the sewage without oxygen, the three tank bodies are sequentially treated in the anaerobic tank, and the organic matters are hydrolyzed, acidified and methanated under the action of anaerobic bacteria to remove the organic matters in the wastewater, so that certain organic matters in the wastewater can be removed, the later purification treatment is facilitated, and the biodegradability of the sewage can be improved;
step 5, leading the sewage from the anaerobic tank into a first aerobic tank and a second aerobic tank to decompose organic matters in the sewage into inorganic matters, detecting different concentrations of the sewage treated in the anaerobic tank, selecting to lead the sewage into the first aerobic tank or the second aerobic tank for use, selecting different later-stage discharge for use according to different concentrations, and having more selectivity and wider applicability;
step 6, after the sewage is treated in the first aerobic tank, the sewage is respectively led into a first biological tank and a second biological tank, a flocculating agent and a coagulant aid are put into the first biological tank, a nutrient auxiliary agent and a curing agent are put into the second biological tank, the sewage is led out to a disinfection tank for disinfection treatment after the sewage is treated in the second aerobic tank, and when the sewage is led into the first aerobic tank, the sewage is selectively led into the first biological tank or the second biological tank for use according to the plants of the artificial wetland; the sewage is subjected to disinfection treatment through a photocatalytic purification reactor, can be directly purified and then discharged, and has high treatment efficiency, good treatment effect and good purification effect;
step 7, discharging the water to a purification tank for use after the flocculant and the coagulant aid are added into the first biological tank for treatment, adding the active biological composition agent into the purification tank, and finally discharging the water to a river or a landscape reservoir; the second biological tank discharges water to the artificial wetland for use after nutrient auxiliary agents and curing agents are added; the sewage is subjected to photocatalytic disinfection in the disinfection tank and is discharged after fine filtration, so that the sewage can be discharged to a river or a farmland for use, can be directly discharged for use, and is convenient to use, high in purification efficiency and good in sewage treatment effect;
the nutrient additive is a composite nutrient additive, and the preparation method comprises the following steps: dissolving chitosan in an acidic aqueous solution to prepare a chitosan-containing solution, so that the chitosan is fully dissolved; adding a ceric ammonium nitrate or ammonium persulfate initiator, adding acrylamide to prepare a chitosan grafted polyacrylamide material, adding isopropanol, and adding a NaOH aqueous solution to prepare a composite nutrient auxiliary agent; the compound nutrient additive prepared by the formula has the advantages of no toxicity, no secondary pollution to water, relatively low price, very high nutrient absorption to plants and improvement on the growth of the plants;
the active biological composition formula comprises: pediococcus pentosaceus, leuconostoc mesenteroides, bacillus subtilis, lactobacillus acidophilus and powdery pichia pastoris; the active biological composition can oxidize or decompose various organic compounds and organic pollutants in the sewage to achieve the purposes of optimizing the environment, protecting human health and saving water resources, and various bacteria take organic substances in the pollutants as food.
Drawings
FIG. 1 is a schematic diagram of the present invention.
The attached drawings indicate the following: the sewage treatment system comprises a sewage treatment system treatment method 10, a water inlet pipe 100, a grid machine 200, a water inlet 210, a water outlet 220, grid bars 230, a sterilization assembly 240, a sedimentation tank 300, a regulating tank 400, a mixing tank 410, a sedimentation assisting tank 420, an S-shaped water channel 430, an anaerobic tank 500, a first aerobic tank 600, a first biological tank 610, a purification tank 611, a second biological tank 620, an artificial wetland 621, a second aerobic tank 700 and a disinfection tank 710.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of the present invention.
A treatment method 10 of a sewage treatment system is provided with a water inlet pipe 100 for leading in sewage for treatment, a grating machine 200 for intercepting and removing impurities in the sewage, a sedimentation tank 300 for settling suspended matters in the sewage, a regulating tank 400 for regulating the flow and concentration of the sewage, an anaerobic tank 500 for carrying out anaerobic treatment on the sewage, a first aerobic tank 600 and a second aerobic tank 700 for decomposing organic matters in the sewage into inorganic matters, a first biological tank 610 and a second biological tank 620 for purifying the sewage, and a disinfection tank 710 for disinfecting the sewage;
the sewage is led into the grating machine 200 from the water inlet pipe 100, the grating machine 200 is communicated to the sedimentation tank 300, the sedimentation tank 300 is communicated to the regulating tank 400, the regulating tank 400 is communicated to the anaerobic tank 500, the anaerobic tank 500 is communicated with the first aerobic tank 600 and the second aerobic tank 700, and the first aerobic tank 600 is communicated to the first biological tank 610 and the second biological tank 620; the second aerobic tank 700 is communicated to the disinfection tank 710.
On one hand, sewage is directly pumped into the grating machine 200 to separate the sewage from the sludge with large particle size, so that the removal time of the sludge with large particle size is saved, the efficiency is improved, on the other hand, some suspended matters (such as garbage, leaves and the like) in the sewage are directly precipitated to the bottom through the sedimentation tank 300 to be discharged, so that the cleaning time of the suspended matters is saved; in the third aspect, the concentration and the flow of the sewage can be directly adjusted through the adjusting tank 400, and the mixing tank and the sedimentation assisting tank play a certain role in cooperation, so that the subsequent sewage treatment effect is improved, and the treatment efficiency is improved; in the fourth aspect, the anaerobic tank 500 hydrolyzes, acidifies and methanates the organic matters by using the action of anaerobic bacteria, removes the organic matters in the sewage, and improves the biodegradability of the sewage; in the fifth aspect, the first aerobic tank 600 and the second aerobic tank 700 can decompose the redundant organic matters in the sewage into inorganic matters, thereby facilitating the sewage treatment in the subsequent process; in the sixth aspect, after the treatment in the first aerobic tank 600, the sewage is purified by adding auxiliary agents into the first biological tank 610 and the second biological tank 620, and then is selectively discharged; in the seventh aspect, after the treatment in the second aerobic tank 700, the sewage is transferred to the disinfection tank 710, and then the sewage is subjected to photocatalytic disinfection in the disinfection tank 710, and is subjected to fine filtration and then is discharged after reaching the standard;
the grating machine 200 is provided with a water inlet 210, a water outlet 220, a grating 230 and a sterilization component 240, the grating 230 is arranged between the water inlet 210 and the water outlet 220, the sterilization component 240 is arranged at the position of the grating 230, the water inlet 210 is connected with the water inlet pipe 100, the water outlet 220 is communicated to the sedimentation tank 300, the grating 230 is used for separating and treating sludge or sundries with large particle size from sewage, and the sterilization component 240 is used for sterilizing the sewage in the treatment process, so that the subsequent treatment of the sewage is prepared.
The sterilization unit 240 is an ultrasonic sterilization unit 240, and the ultrasonic waves have sterilization efficiency mainly caused by cavitation generated thereby. During ultrasonic treatment, when high-intensity ultrasonic waves propagate in a liquid medium, longitudinal waves are generated, so that regions alternately compressed and expanded are generated, and the regions with changed pressure are easy to cause a cavitation phenomenon and form micro bubble nuclei in the medium. The micro bubble nucleus is in the moment of adiabatic shrinkage and collapse, so that certain bacteria in the liquid are killed, viruses are inactivated, and even cell walls of a small number of microorganisms are damaged, and the preparation for the subsequent sewage treatment is facilitated.
The adjusting tank 400 comprises a mixing tank 410 and an sedimentation assisting tank 420, one end of the mixing tank 410 is connected with the sedimentation assisting tank 420, the other end of the mixing tank 410 is connected with the anaerobic tank 500, and the sedimentation assisting tank 420 is connected with the sedimentation tank 300; the sedimentation assisting tank 420 is provided with an S-shaped water channel 430, and precipitates relatively fine impurities and the like in the sewage through the sedimentation assisting tank 420 again, and the precipitates are discharged to the S-shaped water channel 430, and then the sewage is mixed with the water in the mixing tank 410, so that the subsequent purification treatment of the sewage can be facilitated after the mixing.
Anaerobism pond 500 is equipped with the baffle and separates into three cell body with anaerobism pond 500, and three cell body is equipped with the breach intercommunication in the baffle position, can make the time of sewage process longer in anaerobism pond 500, and is longer to the sewage treatment time that does not have oxygen, and the effect of utilizing anaerobe that can be better makes the organic matter take place to hydrolyze, acidize and methanation, removes the organic matter in the sewage, improves the biodegradability of sewage.
First biological pond 610 and second biological pond 620 all are equipped with throws the material subassembly, throw the material subassembly and drop into different auxiliaries to first biological pond 610 and second biological pond 620, use according to the sewage concentration in the biological pond and later stage and drop into different auxiliaries and use, improve the purification treatment to sewage, the treatment effeciency is high moreover.
The first biological pond 610 is communicated with the purification pond 611, sewage can be completely purified and discharged to farmlands through the purification pond 611 finally, the purification effect is good, the second biological pond 620 is communicated with the artificial wetland 621, the artificial wetland 621 is provided with the water outlet 220 communicated to the water inlet pipe 100, the artificial wetland 621 can be conveniently recycled to the water outlet 220 for purification treatment again after being used, and the waste is avoided due to the recycling.
A treatment method of a sewage treatment system comprises the following steps:
step 1, introducing sewage into a grating machine 200 through a water inlet pipe 100, and separating sludge and impurities with large particle size from the sewage through the grating machine 200; the water inlet pipe 100 guides the sewage into the grating machine 200 from the water inlet 210, the grid bars 230 separate sludge and impurities with larger particle sizes from the sewage, and the ultrasonic sterilization assembly 240 performs sterilization treatment on the sewage in the separation process, so that the sterilization effect is good, and the sewage can be conveniently purified subsequently;
step 2, guiding the separated sewage into a sedimentation tank 300 for carrying out sedimentation treatment on suspended matters in the sewage, so that the subsequent sewage treatment can be effectively facilitated, and the purification treatment efficiency is improved;
step 3, leading the sewage from the sedimentation tank 300 into the regulating tank 400, regulating the flow concentration of the sewage through the regulating tank 400, sinking the residual impurities into the S-shaped water channel 430 again in the regulating tank 400 through the settling tank 420 for discharge, placing the pollution-free water quality in the mixing tank 410 to be mixed with the sewage, reserving a part of the pollution-free water quality in the mixing tank 410 after the treatment in the early stage, mixing the part of the pollution-free water quality with the sewage in the post-treatment process, reducing the pollution degree in the sewage after the mixing, being convenient for treating the sewage in a wider range and having high treatment efficiency;
step 4, the adjusting tank 400 guides the sewage into the anaerobic tank 500 to treat the sewage without oxygen, the three tank bodies are sequentially treated in the anaerobic tank 500, and the organic matters are hydrolyzed, acidified and methanated under the action of anaerobic bacteria to remove the organic matters in the wastewater, so that certain organic matters in the wastewater can be removed, the later purification treatment is facilitated, and the biodegradability of the sewage can be improved;
step 5, leading the sewage from the anaerobic tank 500 into the first aerobic tank 600 and the second aerobic tank 700 to decompose organic matters in the sewage into inorganic matters, detecting whether the sewage treated in the anaerobic tank 500 is led into the first aerobic tank 600 or the second aerobic tank 700 for use according to different concentrations, and selecting different later-stage discharge for use according to different concentrations, wherein the selectivity is more, and the applicability is wider;
step 6, after being treated by the first aerobic tank 600, the sewage is respectively led into the first biological tank 610 and the second biological tank 620, a flocculating agent and a coagulant aid are put into the first biological tank 610, a nutrient auxiliary agent and a curing agent are put into the second biological tank 620, the sewage is led out to the disinfection tank 710 for disinfection treatment after being treated by the second aerobic tank 700, and when being led into the first aerobic tank 600, the sewage is led into the first biological tank 610 or the second biological tank 620 for use according to the plant selection of the artificial wetland 621; the wastewater is subjected to nitrification and secondary denitrification when being led into the second aerobic tank 700, then is subjected to photocatalytic disinfection through the disinfection tank 710, is subjected to fine filtration and then is discharged after reaching the standard, the photocatalytic disinfection is to perform disinfection treatment on the wastewater through a photocatalytic purification reactor, can be directly discharged after purification treatment, has high treatment efficiency, can be subjected to disinfection treatment, and has good treatment effect and purification effect;
step 7, discharging the water to a purification pool 611 for use after the flocculant and the coagulant aid are added into the first biological pool 610 for treatment, adding the active biological composition agent into the purification pool 611, and finally discharging the water to a river or a landscape reservoir; the second biological pond 620 discharges water to the artificial wetland 621 for use after adding nutrient auxiliary agents and curing agents; the sewage is subjected to photocatalytic disinfection in the disinfection tank 710 and is discharged after fine filtration, so that the sewage can be discharged to a river or a farmland for use, can be directly discharged for use, is convenient to use, has high purification efficiency and has a good sewage treatment effect;
the nutrient additive is a composite nutrient additive, and the preparation method comprises the following steps: dissolving chitosan in an acidic aqueous solution to prepare a chitosan-containing solution, so that the chitosan is fully dissolved; adding a ceric ammonium nitrate or ammonium persulfate initiator, adding acrylamide to prepare a chitosan grafted polyacrylamide material, adding isopropanol, and adding a NaOH aqueous solution to prepare a composite nutrient auxiliary agent; the compound nutrient additive prepared by the formula has the advantages of no toxicity, no secondary pollution to water, relatively low price, very high nutrient absorption to plants and improvement on the growth of the plants;
the active biological composition formula comprises: pediococcus pentosaceus, leuconostoc mesenteroides, bacillus subtilis, lactobacillus acidophilus and powdery pichia pastoris;
the concentration of the pediococcus acidilactici is 4.0x102cfu/gm-5.0x 102 cfu/gm;
the concentration of the pediococcus pentosaceus is 6.0x103cfu/gm-7.0x 103 cfu/gm;
the concentration of the leuconostoc mesenteroides is 5.0x101 cfu/gm-6.0 x101 cfu/gm;
the concentration of the bacillus subtilis is 4.0x102cfu/gm-5.0x 102 cfu/gm;
the concentration of the lactobacillus acidophilus is 2.0x101cfu/gm-3.0x 101 cfu/gm;
the concentration of the powdery pichia pastoris is 5.0x100cfu/gm to 7.0x 100 cfu/gm;
the active biological composition can oxidize or decompose various organic compounds and organic pollutants in the sewage to achieve the purposes of optimizing the environment, protecting human health and saving water resources, and various bacteria take organic substances in the pollutants as food.
The curing agent consists of tricalcium silicate, dicalcium silicate and tricalcium aluminate, and the proportion is 2:3: 3.
According to the sewage treatment system and the sewage treatment method, the sewage can be quickly treated, and the treated sewage can be directly used in artificial wetlands or directly discharged to reservoirs of river scenic spots and the like, so that the treatment efficiency is high, and the treatment effect is good.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (6)

1. A sewage treatment method is characterized in that: the adopted sewage treatment system comprises a water inlet pipe for leading in sewage to be treated, a grating machine for intercepting and removing impurities in the sewage, a sedimentation tank for precipitating suspended matters in the sewage, an adjusting tank for adjusting the flow and the concentration of the sewage, an anaerobic tank for carrying out anaerobic treatment on the sewage, a first aerobic tank and a second aerobic tank for decomposing organic matters in the sewage into inorganic matters, a first biological tank and a second biological tank for purifying the sewage, and a disinfection tank for disinfecting the sewage;
the sewage is led into a grating machine from the water inlet pipe, the grating machine is communicated to a sedimentation tank, the sedimentation tank is communicated to an adjusting tank, the adjusting tank is communicated to an anaerobic tank, the anaerobic tank is communicated with a first aerobic tank and a second aerobic tank, and the first aerobic tank is communicated to a first biological tank and a second biological tank; the second aerobic tank is communicated to the disinfection tank;
the adjusting tank comprises a mixing tank and an sedimentation assisting tank, one end of the mixing tank is connected with the sedimentation assisting tank, the other end of the mixing tank is connected with the anaerobic tank, and the sedimentation assisting tank is connected with the sedimentation tank; the sedimentation assisting tank is provided with an S-shaped water channel;
the first biological pool and the second biological pool are both provided with feeding components, and different auxiliary agents are fed into the first biological pool and the second biological pool by the feeding components;
the first biological tank is communicated with a purification tank, the second biological tank is communicated with an artificial wetland, and the artificial wetland is provided with a water outlet communicated with a water inlet pipe;
the treatment method comprises the following steps:
step 1, introducing sewage into a grating machine through a water inlet pipe, and separating sludge and impurities with large particle sizes from the sewage through the grating machine;
step 2, guiding the separated sewage into a sedimentation tank to carry out sedimentation treatment on suspended matters in the sewage;
step 3, leading the sewage from the sedimentation tank into an adjusting tank, and adjusting the flow concentration of the sewage through the adjusting tank;
step 4, the adjusting tank guides the sewage into an anaerobic tank to treat the sewage without oxygen;
step 5, leading the sewage from the anaerobic tank into a first aerobic tank and a second aerobic tank to decompose organic matters in the sewage into inorganic matters;
step 6, after the treatment in the first aerobic tank, the sewage is respectively led into a first biological tank and a second biological tank, a flocculating agent and a coagulant aid are put into the first biological tank, a nutrient auxiliary agent and a curing agent are put into the second biological tank, and after the treatment in the second aerobic tank, the sewage is led out to a disinfection tank for disinfection treatment;
step 7, discharging the water to a purification tank for use after the flocculant and the coagulant aid are added into the first biological tank for treatment, adding the active biological composition agent into the purification tank, and finally discharging the water to a river or a landscape reservoir; the second biological tank discharges water to the artificial wetland for use after nutrient auxiliary agents and curing agents are added; carrying out photocatalytic disinfection on the sewage in the disinfection tank, and discharging the sewage after fine filtration, wherein the sewage can be discharged to a river or a farmland for use;
the nutrient additive is a composite nutrient additive, and the preparation method comprises the following steps: dissolving chitosan in an acidic aqueous solution to prepare a chitosan-containing solution, so that the chitosan is fully dissolved; adding a ceric ammonium nitrate or ammonium persulfate initiator, adding acrylamide to prepare a chitosan grafted polyacrylamide material, adding isopropanol, and adding a NaOH aqueous solution to prepare a composite nutrient auxiliary agent;
the formula of the active biological composition agent is as follows: pediococcus pentosaceus, leuconostoc mesenteroides, bacillus subtilis, lactobacillus acidophilus and powdery pichia pastoris;
the concentration of the pediococcus pentosaceus is 6.0x103cfu/gm-7.0x 103 cfu/gm;
the concentration of the leuconostoc mesenteroides is 5.0x101 cfu/gm-6.0 x101 cfu/gm;
the concentration of the bacillus subtilis is 4.0x102cfu/gm-5.0x 102 cfu/gm;
the concentration of the lactobacillus acidophilus is 2.0x101cfu/gm-3.0x 101 cfu/gm;
the concentration of the powdery pichia pastoris is 5.0x100cfu/gm to 7.0x 100 cfu/gm;
the curing agent consists of tricalcium silicate, dicalcium silicate and tricalcium aluminate, and the proportion is 2:3: 3.
2. The method of sewage treatment according to claim 1, wherein: the grating machine is provided with a water inlet, a water outlet, grating strips and a sterilization assembly, the grating strips are arranged between the water inlet and the water outlet, the sterilization assembly is arranged at the positions of the grating strips, the water inlet is connected with a water inlet pipe, and the water outlet is communicated to a sedimentation tank.
3. A method of wastewater treatment according to claim 2, characterized in that: the sterilization component is an ultrasonic sterilization component.
4. The method of sewage treatment according to claim 1, wherein: the anaerobic tank is provided with a partition plate to divide the anaerobic tank into three tank bodies, and the three tank bodies are communicated through gaps arranged at the partition plate.
5. The method of claim 4, wherein: in the step 1, sewage is guided into a grating machine from a water inlet by a water inlet pipe, sludge and impurities with larger particle sizes are separated from the sewage by grating bars, and the sewage is sterilized by an ultrasonic sterilizing component in the separation process;
in the step 3, the residual impurities are sunk into the S-shaped water channel again in the adjusting tank through the settling basin for discharge, and the pollution-free water is placed in the mixing tank to be mixed with the sewage;
in the step 4, the three tank bodies are sequentially treated in the anaerobic tank, and organic matters are hydrolyzed, acidified and methanated under the action of anaerobic bacteria to remove the organic matters in the wastewater;
in the step 5, the sewage treated in the anaerobic tank is detected, and the sewage is guided into the first aerobic tank or the second aerobic tank for use according to different sewage concentrations;
in the step 6, when the artificial wetland is introduced into the first aerobic tank, the artificial wetland is selectively introduced into the first biological tank or the second biological tank for use according to the plants of the artificial wetland; when the sewage is led into the second aerobic tank, the sewage is denitrified for the second time through nitration, and then the sewage is subjected to photocatalytic disinfection through the disinfection tank and then is discharged after reaching the standard through fine filtration.
6. The method of claim 5, wherein: in the step 6, the photocatalytic disinfection is to disinfect the sewage through a photocatalytic purification reactor.
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CN108585354A (en) * 2018-04-28 2018-09-28 重庆美天环保工程有限公司 A kind of sewage treatment system and method
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