CN112408724A - Method and system for treating wastewater of farm - Google Patents

Method and system for treating wastewater of farm Download PDF

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Publication number
CN112408724A
CN112408724A CN202011419049.2A CN202011419049A CN112408724A CN 112408724 A CN112408724 A CN 112408724A CN 202011419049 A CN202011419049 A CN 202011419049A CN 112408724 A CN112408724 A CN 112408724A
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China
Prior art keywords
farm
wastewater
treatment
waste water
carrying
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CN202011419049.2A
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Chinese (zh)
Inventor
钟裕林
钟裕辉
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Shenzhen Haotianyuan Environmental Protection Tech Co ltd
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Shenzhen Haotianyuan Environmental Protection Tech Co ltd
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Priority to CN202011419049.2A priority Critical patent/CN112408724A/en
Publication of CN112408724A publication Critical patent/CN112408724A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/34Biological treatment of water, waste water, or sewage characterised by the microorganisms used

Abstract

The invention provides a method and a system for treating wastewater of a farm, wherein the method comprises the following steps: carrying out solid-liquid separation treatment on the farm wastewater, and purifying the farm wastewater subjected to solid-liquid separation; degrading the purified wastewater of the farm, and aerating the degraded wastewater of the farm; nitrifying the aerated farm wastewater, and denitrifying the nitrified farm wastewater; adding anaerobic digestion liquid into the denitrified wastewater of the farm, and carrying out SBR treatment on the wastewater of the farm; conveying the wastewater of the farm treated by the SBR to an artificial wetland for standing, and filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition; and discharging the filtered waste water of the farm. According to the invention, the treatment efficiency of the wastewater in the farm is effectively improved by the design of solid-liquid separation treatment, water quality purification, degradation treatment, aeration treatment, nitrification treatment, denitrification treatment, SBR treatment and constructed wetland standing on the wastewater in the farm.

Description

Method and system for treating wastewater of farm
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method and a system for treating wastewater in a farm.
Background
The waste water of the farm mainly comprises animal urine, part of animal excrement and feeding house washing water, belongs to high-concentration organic waste water, and has large content of suspended matters and ammonia nitrogen. After the untreated wastewater enters a natural water body, the contents of solid suspended matters, organic matters and microorganisms in the water are increased, the physical, chemical and biological community composition of the water body is changed, and the water quality is deteriorated. The waste water also contains a large amount of pathogenic microorganisms which can be diffused and spread through water or aquatic animals and plants, thus harming the health of people and livestock. In order to organically combine the economic benefit, the social benefit and the environmental benefit and enable enterprises to walk a sustainable development road, the wastewater of the enterprises needs to be effectively treated.
The existing farm wastewater treatment methods adopt a combined treatment method which mainly integrates physical and chemical treatment processes by using a biological method, and have low removal efficiency and can not achieve ideal treatment effect.
Disclosure of Invention
The embodiment of the invention aims to provide a method and a system for treating wastewater of a farm, and aims to solve the problem of low wastewater treatment efficiency of the existing farm.
The embodiment of the invention is realized in such a way that a farm wastewater method system comprises the following steps:
carrying out solid-liquid separation treatment on the farm wastewater, and purifying the farm wastewater subjected to solid-liquid separation;
carrying out degradation treatment on the purified wastewater of the farm, and carrying out aeration treatment on the degraded wastewater of the farm;
nitrifying the aerated farm wastewater, and denitrifying the nitrified farm wastewater;
adding anaerobic digestion liquid into the denitrified wastewater of the farm, and carrying out SBR treatment on the wastewater of the farm;
conveying the wastewater of the farm after SBR treatment to an artificial wetland for standing, and filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition;
and discharging the filtered waste water of the farm.
Further, the step of performing solid-liquid separation treatment on the farm wastewater and performing water purification on the farm wastewater after the solid-liquid separation comprises:
standing the wastewater of the farm, and removing impurities obtained in the standing process;
controlling a filter screen to sieve the wastewater of the farm, and performing centrifugal separation on the sieved wastewater of the farm;
adding a coagulant into the centrifuged wastewater of the farm for stirring, and aggregating suspended particles and colloidal particles in the wastewater of the farm into particle impurities;
adding an acid neutralizer into the waste water of the farm, stirring, and neutralizing the pH of alkaline substances in the waste water of the farm.
Further, the step of performing degradation treatment on the purified wastewater of the farm and performing aeration treatment on the wastewater of the farm after degradation comprises:
enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the perforated aerator pipe has a strength of 2 to 6m/(m × h), and the power of the perforated aerator pipe is greater than 4W/m through labor when the content of suspended solids in the farm wastewater is greater than 200 mg/L.
Further, the nitrifying the aerated farm wastewater and the denitrifying the nitrified farm wastewater comprise:
conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria convert ammonia nitrogen in the waste water of the farm into nitrite;
adding nitrate bacteria to the farm wastewater such that the nitrate bacteria convert the nitrite in the farm wastewater to nitrate;
adding denitrifying bacteria to the farm wastewater so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen.
Further, the step of adding anaerobic digestion solution into the denitrified wastewater of the farm and performing SBR treatment on the wastewater of the farm comprises the following steps:
adding the anaerobic digestion solution into the wastewater of the farm, and carrying out an aeration reaction on the wastewater of the farm;
carrying out anaerobic reaction on the aerated farm wastewater, and adding microorganisms into the anaerobic farm wastewater for degradation;
carrying out solid-liquid separation operation on the degraded farm wastewater, and standing the farm wastewater after solid-liquid separation;
and collecting solid impurities and sludge flocs in the wastewater of the farm after standing into a sludge tank, and removing supernatant in the wastewater of the farm.
Further, after the step of delivering the wastewater of the farm after the SBR treatment to the artificial wetland for standing, the method further comprises:
when the standing time of the wastewater of the farm is judged to be equal to a time threshold value, the wastewater of the farm is judged to meet the discharge condition, or when the residual volume of the wastewater of the farm is judged to be equal to a volume threshold value, the wastewater of the farm is judged to meet the discharge condition.
It is another object of an embodiment of the present invention to provide a farm wastewater treatment system, including:
the waste water separation and purification module is used for carrying out solid-liquid separation treatment on the waste water of the farm and purifying the water quality of the waste water of the farm after the solid-liquid separation;
the wastewater degradation aeration module is used for carrying out degradation treatment on the purified wastewater of the farm and carrying out aeration treatment on the degraded wastewater of the farm;
the wastewater nitrification and denitrification module is used for performing nitrification treatment on the aerated farm wastewater and performing denitrification treatment on the nitrified farm wastewater;
the wastewater SBR treatment module is used for adding anaerobic digestion liquid into the denitrified wastewater of the farm and carrying out SBR treatment on the wastewater of the farm;
and the wastewater discharge control module is used for conveying the wastewater of the farm after the SBR treatment to the artificial wetland for standing, filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition, and discharging the filtered wastewater of the farm.
Further, the wastewater separation and purification module is further configured to:
standing the wastewater of the farm, and removing impurities obtained in the standing process;
controlling a filter screen to sieve the wastewater of the farm, and performing centrifugal separation on the sieved wastewater of the farm;
adding a coagulant into the centrifuged wastewater of the farm for stirring, and aggregating suspended particles and colloidal particles in the wastewater of the farm into particle impurities;
adding an acid neutralizer into the waste water of the farm, stirring, and neutralizing the pH of alkaline substances in the waste water of the farm.
Further, the wastewater degradation aeration module is further configured to:
enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the perforated aerator pipe has a strength of 2 to 6m/(m × h), and the power of the perforated aerator pipe is greater than 4W/m through labor when the content of suspended solids in the farm wastewater is greater than 200 mg/L.
Further, the wastewater nitrification and denitrification module is also used for:
conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria convert ammonia nitrogen in the waste water of the farm into nitrite;
adding nitrate bacteria to the farm wastewater such that the nitrate bacteria convert the nitrite in the farm wastewater to nitrate;
adding denitrifying bacteria to the farm wastewater so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen.
According to the embodiment of the invention, through the design of solid-liquid separation and water purification of the wastewater of the farm, the filtering effect on impurities in the wastewater of the farm can be effectively achieved, through the design of degradation and aeration treatment on the wastewater of the farm, organic matters in the wastewater of the farm can be effectively decomposed, and the separation effect on suspended impurities in the wastewater of the farm can be achieved.
Drawings
FIG. 1 is a flow chart of a method for treating wastewater from a farm according to a first embodiment of the present invention;
FIG. 2 is a flow chart of a method for treating wastewater from a farm according to a second embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of a wastewater treatment system for a farm according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Example one
Referring to fig. 1, a flow chart of a method for treating wastewater from a farm according to a first embodiment of the present invention includes the steps of:
step S10, performing solid-liquid separation treatment on the farm wastewater, and performing water quality purification on the farm wastewater after the solid-liquid separation;
wherein, solid-liquid separation of the waste water of the farm can be carried out by adopting a filter screen, a grating well or a filter so as to remove larger impurities in the waste water of the farm;
step S20, carrying out degradation treatment on the purified wastewater of the farm, and carrying out aeration treatment on the degraded wastewater of the farm;
the method comprises the following steps of (1) degrading the wastewater of the farm by a degradation treatment design so as to reduce the content of organic matters in the wastewater of the farm, and further degrading the wastewater of the farm by a physical method or a chemical method;
specifically, in this step, aeration is a means for bringing air into strong contact with the farm wastewater, and is intended to dissolve oxygen in the air into the farm wastewater or to release unnecessary gases and volatile substances in the farm wastewater into the air, so that the content of non-soluble substances in the farm wastewater can be effectively reduced by subjecting the farm wastewater to aeration treatment, thereby improving the treatment efficiency of the farm wastewater;
step S30, nitrifying the aerated farm wastewater, and denitrifying the nitrified farm wastewater;
the ammonia nitrogen substances in the wastewater of the farm form nitrogen through the design of nitrification treatment and denitrification treatment on the wastewater of the farm, so that the aim of removing the ammonia nitrogen is fulfilled, and the treatment efficiency of the wastewater of the farm is improved;
step S40, adding anaerobic digestion liquid into the denitrified wastewater of the farm, and carrying out SBR treatment on the wastewater of the farm;
the anaerobic digestion solution is added into the waste water of the farm, so that the organic matters in the waste water of the farm can be effectively subjected to anaerobic reaction, and the content of the organic matters in the waste water of the farm is reduced;
preferably, the SBR treatment is an intermittent active sludge system, which is basically characterized in that biochemical reaction, solid-liquid separation, water discharge and sludge discharge of sewage are completed in one reaction tank, continuous water inlet and outlet of the wastewater of a farm can be realized through double-tank or multi-tank combined operation, and the SBR treatment realizes different treatment targets through controlling aeration quantity and dissolved oxygen of the reaction tank, thereby having great flexibility;
step S50, conveying the wastewater of the farm after SBR treatment to an artificial wetland for standing, and filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition;
the artificial wetland mainly comprises a gravel bed, a substrate and aquatic plants, the plants planted in the artificial wetland are mainly moisture-resistant plants such as reed, and when the wastewater in the farm flows through the artificial wetland, the plants growing in the low-lying land or the marshland can intercept, adsorb and absorb suspended matters, organic matters and mineral elements in the water and convert the suspended matters, the organic matters and the mineral elements into plant products;
preferably, the emission requirement may be set according to a user's requirement, and in this embodiment, the emission requirement is a national standard emission requirement;
step S60, discharging the filtered waste water of the farm;
the embodiment effectively improves the treatment efficiency of the waste water of the farm by the design of solid-liquid separation treatment, water purification, degradation treatment, aeration treatment, nitration treatment, denitrification treatment, SBR treatment and constructed wetland standing of the waste water of the farm, particularly, can effectively filter impurities in the waste water of the farm by the design of solid-liquid separation and water purification of the waste water of the farm, can effectively decompose organic matters in the waste water of the farm by the design of degradation and aeration treatment of the waste water of the farm, can separate suspended impurities in the waste water of the farm, can remove ammonia nitrogen substances in the waste water of the farm by the design of nitration and denitrification treatment of the waste water of the farm, and can achieve the biodegradation effect of the waste water of the farm by the design of SBR treatment of the waste water of the farm, so that the wastewater treatment efficiency of the farm is high.
Example two
Referring to fig. 2, a flow chart of a wastewater treatment method for a farm according to a second embodiment of the present invention includes the steps of:
step S11, standing the farm wastewater, and removing impurities obtained in the standing process;
the standing time of the waste water of the farm can be set according to the requirements of users, and when the waste water of the farm reaches the preset standing time, impurities remained at the bottom of the waste water of the farm are removed, so that the content of the impurities in the waste water of the farm is effectively reduced;
step S21, controlling a filter screen to carry out sieving operation on the wastewater of the farm, and carrying out centrifugal separation on the sieved wastewater of the farm;
the filter aperture of the filter screen can be set according to the requirements of users, and when the farm wastewater containing suspended matters rotates at a high speed in the centrifugal separation process of the farm wastewater, the suspended matters and the water have different densities and the centrifugal force is different, so that the solid-liquid separation of the farm wastewater is realized, the effect of removing impurities is achieved, and the impurities in the farm wastewater are further reduced;
step S31, adding a coagulant into the centrifuged farm wastewater, stirring, and aggregating suspended particles and colloidal particles in the farm wastewater into particle impurities;
wherein, under the action of the coagulant, the smaller suspended particles or colloidal particles are aggregated into larger particles, and the particles are precipitated under the action of gravity, so that the effect of removing impurities is achieved, and the treatment efficiency of the wastewater of the farm is improved;
step S41, adding an acid neutralizer into the farm wastewater, stirring, and neutralizing the pH of alkaline substances in the farm wastewater;
the pH value of the wastewater of the farm can be effectively adjusted by adding an acidic neutralizing agent and an alkaline substance into the wastewater of the farm, so that the content of acidic substances in the wastewater of the farm is reduced;
step S51, enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
wherein, the surface of the filter material is covered with a biological membrane, a large number of microorganisms are adhered on the biological membrane, and the biological membrane is a colloidal membrane formed by mass propagation of various microorganisms in the sewage on the surface of the filter material;
specifically, in the step, the biological membrane can be used for effectively carrying out oxidative decomposition on the organic matters in the wastewater of the farm so as to reduce the content of the organic matters in the wastewater of the farm;
step S61, adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the design that activated sludge is added into the waste water of the farm for stirring is adopted, so that organic matters in the waste water of the farm are adsorbed and oxidized by the activated sludge, and the content of the organic matters in the waste water of the farm is further reduced;
preferably, the perforated aerator pipe has a strength of 2 to 6m/(m h), and the power of the perforated aerator pipe is greater than 4W/m for carrying out thin film cultivation when the suspended matter content in the farm wastewater is greater than 200 mg/L;
step S71, conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria can convert ammonia nitrogen in the waste water of the farm into nitrite;
the nitrite bacteria is added into the waste water of the farm, so that the nitrite bacteria can effectively carry out nitration reaction with the ammonia nitrogen substances in the waste water of the farm, and the ammonia nitrogen substances can be converted into nitrite;
step S81, adding nitric acid bacteria into the farm wastewater, so that the nitric acid bacteria convert the nitrite in the farm wastewater into nitrate;
wherein the nitrifying bacteria have a proper pH value of 8.0-8.4 and an optimal temperature of 35 ℃;
step S91, adding denitrifying bacteria into the wastewater of the farm so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen;
the design of adding denitrifying bacteria into the wastewater of the farm can effectively reduce nitrite and nitrate into nitrogen, and the nitrogen escapes from the wastewater of the farm;
step S101, adding anaerobic digestion liquid into the denitrified wastewater of the farm, and carrying out SBR treatment on the wastewater of the farm;
specifically, in this step, the step of adding an anaerobic digestion solution to the denitrified farm wastewater and performing SBR treatment on the farm wastewater includes:
adding the anaerobic digestion solution into the wastewater of the farm, and carrying out an aeration reaction on the wastewater of the farm;
carrying out anaerobic reaction on the aerated farm wastewater, and adding microorganisms into the anaerobic farm wastewater for degradation;
carrying out solid-liquid separation operation on the degraded farm wastewater, and standing the farm wastewater after solid-liquid separation;
and collecting solid impurities and sludge flocs in the wastewater of the farm after standing into a sludge tank, and removing supernatant in the wastewater of the farm.
Step S111, conveying the wastewater of the farm after SBR treatment to an artificial wetland for standing, and filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition;
specifically, in this step, after the step of delivering the wastewater of the farm after the SBR treatment to the artificial wetland for standing, the method further includes:
when it is judged that the standing time of the wastewater of the farm is equal to a time threshold, it is judged that the wastewater of the farm satisfies the discharge condition, or
And when the residual volume of the wastewater of the farm is judged to be equal to the volume threshold value, judging that the wastewater of the farm meets the discharge condition.
Step S121, discharging the filtered waste water of the farm;
the embodiment effectively improves the treatment efficiency of the waste water of the farm by the design of solid-liquid separation treatment, water purification, degradation treatment, aeration treatment, nitration treatment, denitrification treatment, SBR treatment and constructed wetland standing of the waste water of the farm, particularly, can effectively filter impurities in the waste water of the farm by the design of solid-liquid separation and water purification of the waste water of the farm, can effectively decompose organic matters in the waste water of the farm by the design of degradation and aeration treatment of the waste water of the farm, can separate suspended impurities in the waste water of the farm, can remove ammonia nitrogen substances in the waste water of the farm by the design of nitration and denitrification treatment of the waste water of the farm, and can achieve the biodegradation effect of the waste water of the farm by the design of SBR treatment of the waste water of the farm, so that the wastewater treatment efficiency of the farm is high.
EXAMPLE III
Referring to fig. 3, a schematic structural diagram of a wastewater treatment system for a farm according to a third embodiment of the present invention is shown, the system including:
and the wastewater separation and purification module 10 is used for performing solid-liquid separation treatment on the wastewater of the farm and purifying the wastewater of the farm after the solid-liquid separation.
Preferably, the wastewater separation and purification module 10 is further configured to: standing the wastewater of the farm, and removing impurities obtained in the standing process;
controlling a filter screen to sieve the wastewater of the farm, and performing centrifugal separation on the sieved wastewater of the farm;
adding a coagulant into the centrifuged wastewater of the farm for stirring, and aggregating suspended particles and colloidal particles in the wastewater of the farm into particle impurities;
adding an acid neutralizer into the waste water of the farm, stirring, and neutralizing the pH of alkaline substances in the waste water of the farm.
And the wastewater degradation aeration module 11 is used for performing degradation treatment on the purified wastewater of the farm and performing aeration treatment on the degraded wastewater of the farm.
Preferably, the wastewater degradation aeration module 11 is further configured to: enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the perforated aerator pipe has a strength of 2 to 6m/(m × h), and the power of the perforated aerator pipe is greater than 4W/m through labor when the content of suspended solids in the farm wastewater is greater than 200 mg/L.
And the wastewater nitrification and denitrification module 12 is used for nitrifying the aerated farm wastewater and denitrifying the nitrified farm wastewater.
Preferably, the wastewater nitrification and denitrification module 12 is further configured to: conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria convert ammonia nitrogen in the waste water of the farm into nitrite;
adding nitrate bacteria to the farm wastewater such that the nitrate bacteria convert the nitrite in the farm wastewater to nitrate;
adding denitrifying bacteria to the farm wastewater so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen.
And the wastewater SBR treatment module 13 is used for adding anaerobic digestion liquid into the denitrified wastewater of the farm and carrying out SBR treatment on the wastewater of the farm.
Preferably, the wastewater SBR treatment module 13 is further configured to: adding the anaerobic digestion solution into the wastewater of the farm, and carrying out an aeration reaction on the wastewater of the farm;
carrying out anaerobic reaction on the aerated farm wastewater, and adding microorganisms into the anaerobic farm wastewater for degradation;
carrying out solid-liquid separation operation on the degraded farm wastewater, and standing the farm wastewater after solid-liquid separation;
and collecting solid impurities and sludge flocs in the wastewater of the farm after standing into a sludge tank, and removing supernatant in the wastewater of the farm.
And the wastewater discharge control module 14 is used for conveying the wastewater of the farm after the SBR treatment to the artificial wetland for standing, filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition, and discharging the filtered wastewater of the farm.
Preferably, the wastewater discharge control module 14 is further configured to: when it is judged that the standing time of the wastewater of the farm is equal to a time threshold, it is judged that the wastewater of the farm satisfies the discharge condition, or
And when the residual volume of the wastewater of the farm is judged to be equal to the volume threshold value, judging that the wastewater of the farm meets the discharge condition.
The embodiment of the invention effectively improves the treatment efficiency of the waste water of the farm by the design of solid-liquid separation treatment, water quality purification, degradation treatment, aeration treatment, nitration treatment, denitrification treatment, SBR treatment and constructed wetland standing for the waste water of the farm, particularly, the design of solid-liquid separation and water quality purification for the waste water of the farm can effectively filter the impurities in the waste water of the farm, the design of degradation and aeration treatment for the waste water of the farm can effectively decompose the organic matters in the waste water of the farm and can separate the suspended impurities in the waste water of the farm, the design of nitration and denitrification treatment for the waste water of the farm can remove the ammonia nitrogen substances in the waste water of the farm, and the design of SBR treatment for the waste water of the farm can achieve the biodegradation effect for the waste water of the farm, so that the wastewater treatment efficiency of the farm is high.
It will be understood by those skilled in the art that the configuration shown in fig. 3 is not intended to be limiting of the present invention, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components, and that the method of treating wastewater in fig. 1-2 may be implemented using more or fewer components than those shown in fig. 3, or some components in combination, or a different arrangement of components. The units, modules, etc. referred to herein are a series of computer programs that can be executed by a processor (not shown) in the wastewater treatment system of the target farm and that function to perform a specific function, and that are all stored in a memory device (not shown) of the wastewater treatment system of the target farm.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A method for treating wastewater in a farm, the method comprising:
carrying out solid-liquid separation treatment on the farm wastewater, and purifying the farm wastewater subjected to solid-liquid separation;
carrying out degradation treatment on the purified wastewater of the farm, and carrying out aeration treatment on the degraded wastewater of the farm;
nitrifying the aerated farm wastewater, and denitrifying the nitrified farm wastewater;
adding anaerobic digestion liquid into the denitrified wastewater of the farm, and carrying out SBR treatment on the wastewater of the farm;
conveying the wastewater of the farm after SBR treatment to an artificial wetland for standing, and filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition;
and discharging the filtered waste water of the farm.
2. The method according to claim 1, wherein the step of performing solid-liquid separation treatment on the wastewater from the farm and purifying the wastewater from the solid-liquid separation comprises:
standing the wastewater of the farm, and removing impurities obtained in the standing process;
controlling a filter screen to sieve the wastewater of the farm, and performing centrifugal separation on the sieved wastewater of the farm;
adding a coagulant into the centrifuged wastewater of the farm for stirring, and aggregating suspended particles and colloidal particles in the wastewater of the farm into particle impurities;
adding an acid neutralizer into the waste water of the farm, stirring, and neutralizing the pH of alkaline substances in the waste water of the farm.
3. The method according to claim 1, wherein the step of subjecting the purified wastewater to degradation treatment and subjecting the wastewater to aeration treatment comprises:
enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the perforated aerator pipe has a strength of 2 to 6m/(m × h), and the power of the perforated aerator pipe is greater than 4W/m through labor when the content of suspended solids in the farm wastewater is greater than 200 mg/L.
4. The method according to claim 1, wherein the step of nitrifying the aerated farm wastewater and denitrifying the nitrified farm wastewater comprises:
conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria convert ammonia nitrogen in the waste water of the farm into nitrite;
adding nitrate bacteria to the farm wastewater such that the nitrate bacteria convert the nitrite in the farm wastewater to nitrate;
adding denitrifying bacteria to the farm wastewater so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen.
5. The method of treating farm wastewater according to claim 1, wherein the step of adding anaerobic digestion solution to the farm wastewater after denitrification and performing SBR treatment on the farm wastewater comprises:
adding the anaerobic digestion solution into the wastewater of the farm, and carrying out an aeration reaction on the wastewater of the farm;
carrying out anaerobic reaction on the aerated farm wastewater, and adding microorganisms into the anaerobic farm wastewater for degradation;
carrying out solid-liquid separation operation on the degraded farm wastewater, and standing the farm wastewater after solid-liquid separation;
and collecting solid impurities and sludge flocs in the wastewater of the farm after standing into a sludge tank, and removing supernatant in the wastewater of the farm.
6. The method according to claim 1, wherein after the step of delivering the wastewater from the farm after SBR treatment to the constructed wetland for standing, the method further comprises:
when it is judged that the standing time of the wastewater of the farm is equal to a time threshold, it is judged that the wastewater of the farm satisfies the discharge condition, or
And when the residual volume of the wastewater of the farm is judged to be equal to the volume threshold value, judging that the wastewater of the farm meets the discharge condition.
7. A farm wastewater treatment system, the system comprising:
the waste water separation and purification module is used for carrying out solid-liquid separation treatment on the waste water of the farm and purifying the water quality of the waste water of the farm after the solid-liquid separation;
the wastewater degradation aeration module is used for carrying out degradation treatment on the purified wastewater of the farm and carrying out aeration treatment on the degraded wastewater of the farm;
the wastewater nitrification and denitrification module is used for performing nitrification treatment on the aerated farm wastewater and performing denitrification treatment on the nitrified farm wastewater;
the wastewater SBR treatment module is used for adding anaerobic digestion liquid into the denitrified wastewater of the farm and carrying out SBR treatment on the wastewater of the farm;
and the wastewater discharge control module is used for conveying the wastewater of the farm after the SBR treatment to the artificial wetland for standing, filtering the wastewater of the farm when the wastewater of the farm meets the discharge condition, and discharging the filtered wastewater of the farm.
8. The farm wastewater treatment system of claim 7, wherein the wastewater separation and purification module is further configured to:
standing the wastewater of the farm, and removing impurities obtained in the standing process;
controlling a filter screen to sieve the wastewater of the farm, and performing centrifugal separation on the sieved wastewater of the farm;
adding a coagulant into the centrifuged wastewater of the farm for stirring, and aggregating suspended particles and colloidal particles in the wastewater of the farm into particle impurities;
adding an acid neutralizer into the waste water of the farm, stirring, and neutralizing the pH of alkaline substances in the waste water of the farm.
9. The farm wastewater treatment system of claim 7, wherein the wastewater degradation aeration module is further to:
enabling the waste water of the farm to pass through a filter material fully coated with a biological membrane, and oxidizing organic matters in the waste water of the farm according to microorganisms on the biological membrane;
adding activated sludge into the oxidized waste water of the farm for stirring, and carrying out aeration operation on the stirred waste water of the farm through a perforated aeration pipe;
the perforated aerator pipe has a strength of 2 to 6m/(m × h), and the power of the perforated aerator pipe is greater than 4W/m through labor when the content of suspended solids in the farm wastewater is greater than 200 mg/L.
10. The farm wastewater treatment system of claim 7, wherein the wastewater nitrification denitrification module is further configured to:
conveying the waste water of the farm to an aerobic environment, and adding nitrite bacteria into the waste water of the farm so that the nitrite bacteria convert ammonia nitrogen in the waste water of the farm into nitrite;
adding nitrate bacteria to the farm wastewater such that the nitrate bacteria convert the nitrite in the farm wastewater to nitrate;
adding denitrifying bacteria to the farm wastewater so that the denitrifying bacteria reduce the nitrite and the nitrate into nitrogen.
CN202011419049.2A 2020-12-07 2020-12-07 Method and system for treating wastewater of farm Pending CN112408724A (en)

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