CN113620519A - Method for treating, purifying and recycling garbage penetrating fluid wastewater by biological microalgae - Google Patents
Method for treating, purifying and recycling garbage penetrating fluid wastewater by biological microalgae Download PDFInfo
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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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- 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
-
- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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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)
- Water Treatment By Sorption (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention provides a biological microalgae treatment, purification and recycling method for waste liquid wastewater of refuse penetrating fluid, which comprises the following steps: collecting wastewater, pretreating the wastewater, constructing a treatment tank, performing biological ceramic treatment, performing aeration treatment, adjusting nutrition, treating and utilizing microalgae, and recycling water; the invention mainly utilizes biological pottery and microalgae to carry out biological treatment, and firstly carries out physical and chemical treatment of coagulating sedimentation, oxidation reaction, ammonia stripping and pretreatment of activated carbon adsorption to remove toxic impurities in water and avoid influencing the normal operation of the biological treatment, then the biological pottery is reacted with garbage penetrating fluid wastewater through a microbial film on a biological pottery sheet to absorb organic pollutants in the wastewater as nutrient substances for metabolism of the biological pottery, aeration and oxygenation are matched to create living environment suitable for the microalgae, and then the organic matters in the garbage penetrating fluid are absorbed and utilized by the microalgae, so that the effectiveness of the biological treatment is ensured by regulating the water quality.
Description
Technical Field
The invention relates to a biological microalgae treatment, purification and recycling method for waste leachate wastewater, and belongs to the technical field of wastewater treatment.
Background
The garbage percolate is high-concentration organic wastewater which is formed by deducting the saturated water holding capacity of garbage and a soil covering layer from the moisture contained in the garbage in a garbage landfill, rain, snow water entering the landfill and other moisture, and passing through the garbage layer and the soil covering layer, and also accumulated moisture leaked by the garbage prepared for incineration;
the treatment method of the landfill leachate comprises a physical chemical method and a biological method, wherein the physical chemical method mainly comprises various methods such as activated carbon adsorption, chemical precipitation, density separation, chemical oxidation, chemical reduction, ion exchange, membrane dialysis, air stripping, wet oxidation and the like, the biological method is divided into aerobic biological treatment, anaerobic biological treatment and combination of the aerobic biological treatment and the anaerobic biological treatment, the aerobic treatment comprises an activated sludge method, an aeration oxidation pond, an aerobic stabilization pond, a biological rotating disk, a trickling filter and the like, and the anaerobic treatment comprises an upflow sludge bed, an anaerobic immobilized biological reactor, a mixing reactor and an anaerobic stabilization pond, wherein the physical and chemical method has higher treatment cost, is not suitable for treating the landfill leachate with large water volume, and is more excellent in treatment environment protection, but the biological method is easily influenced by the change of water quality and water volume to influence the treatment effect.
At present, the garbage penetrating fluid microalgae treatment purification and recycling method disclosed in Chinese patent with publication number CN112358125A comprises the following steps: step one, performing grid filtration on the garbage penetrating fluid, performing static settlement treatment, wherein the garbage penetrating fluid after the static settlement treatment forms a layered structure, the upper layer is a suspended substance, the bottom layer is a precipitated substance, and the middle layer is a suspended penetrating fluid; step two, leading out the suspended penetrating fluid in the step one, and carrying out microfiltration treatment to obtain clear liquid; step three, diluting the clear liquid obtained in the step two to form microalgae culture solution, and inoculating microalgae seeds for culture; and step four, absorbing and utilizing nitrogen, phosphorus and organic matters in the garbage penetrating fluid by the microalgae in the growth process, and adsorbing and decomposing harmful substances in the clear liquid, namely realizing the purification treatment of the garbage penetrating fluid. Through the method, COD, ammonia nitrogen and total phosphorus of the refuse leachate can be remarkably reduced, the requirement of sewage discharge is met, the effectiveness of biological treatment is guaranteed by adjusting water quality, the method is different from direct microalgae treatment in the patent, the method is more reliable, water after biological treatment is matched with electrolyte, disinfection is carried out through electrolytic reaction, then disinfection components are removed, distilled water is obtained, the distilled water can be directly utilized, and the recovery of water resources is facilitated, which is not possessed by the patent.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for treating, purifying and recycling the waste water containing the refuse leachate by using biological microalgae.
The invention is realized by the following technical scheme.
The invention provides a biological microalgae treatment, purification and recycling method for waste liquid wastewater of refuse leachate, which comprises the following steps:
collecting wastewater: collecting the waste water of the garbage penetrating fluid, and carrying out solid-liquid separation on the waste water of the garbage penetrating fluid by using a solid-liquid separator;
wastewater pretreatment: performing coagulating sedimentation materialization, ammonia stripping and activated carbon adsorption treatment on the garbage penetrating fluid wastewater treated in the step I;
thirdly, constructing a treatment tank: digging a treatment tank and a microalgae growth tank, building a greenhouse on the two tanks, and pouring the garbage penetrating fluid wastewater into the treatment tank;
fourthly, biological ceramic treatment: adding biological ceramic pieces into the treatment pool to absorb organic pollutants in the waste water of the garbage penetrating fluid as nutrient substances for metabolism of the garbage penetrating fluid;
aeration treatment: aerating and oxygenating the waste water of the garbage penetrating fluid by using an air pump, and detecting indexes of CODcr and BOD5 in the waste water of the garbage penetrating fluid by using an oxygen content detector;
sixthly, nutrition regulation: when indexes in the waste water of the garbage penetrating fluid compound with living environment of biological microalgae, stopping aerating the waste water, and fishing out the biological ceramic pieces in the treatment tank;
and seventhly, microalgae treatment and utilization: introducing the waste liquid of the garbage penetrating fluid into a microalgae growth pool, culturing microalgae, and extracting esters and glycerin rich in the microalgae after the microalgae are mature to prepare liquid fuel;
recovery and utilization of water: adding electrolyte into the water after the microalgae absorption treatment, generating electrolytic reaction on the electrolyte and water by electrifying the electrode plates to generate subacidity hypochlorous acid disinfectant fluid, disinfecting the treated water, and removing disinfection components to obtain distilled water.
The step II comprises the following steps:
(2.1) adding a coagulant into the waste water of the garbage penetrating fluid to perform coagulation and precipitation treatment;
(2.2) after the physical and chemical treatment of the coagulating sedimentation, adding the garbage penetrating fluid wastewater into an electrolytic tank, adding a composite catalyst and an oxidant, electrifying an anode electrode and a cathode electrode, accelerating an oxidation reaction, destroying functional groups of a surfactant dissolved in water, and filtering after forming flocculated solids;
(2.3) measuring the water quality after filtering, and treating by ammonia stripping when high-concentration ammonia nitrogen exists in the water; when the water has chromaticity, organic matters which are difficult to degrade and heavy metal ions, the water is treated by adopting an activated carbon adsorption mode.
The coagulant is polyacrylamide, the addition amount of the coagulant is determined according to the waste water amount of the garbage penetrating fluid, and the adding amount is 0.001-0.5g/L of the garbage penetrating fluid waste water.
And in the third step, the greenhouse is covered with 2-3 layers of heat-insulating films.
In the step IV, the biological ceramic pieces are selected from ceramic pieces consisting of plant fibers, mineral substances, microorganism extracts and argil, and the addition amount of the biological ceramic pieces is one fourth of the total volume of the garbage penetrating fluid wastewater.
And sixthly, treating the garbage penetrating fluid wastewater after nutrient adjustment by adopting a microfiltration membrane with the aperture of 0.3-0.8 mu m.
The micro-filtration membrane is any one or a combination of two of a ceramic membrane, a metal membrane and a polymer membrane.
In the step (c), the microalgae is one or more of chlorella, scenedesmus, botryococcus, chlamydomonas and spirulina.
In the step eight, the generation process of the slightly acidic hypochlorous acid disinfectant fluid comprises the following steps:
mixing electrolyte and water into weak brine with weak acidity, starting an electrode plate to perform electrolytic reaction on the electrolyte and the water, performing fixed-value electrolysis in static complete electrolysis, electrolyzing 1-2% weak brine with the electrode plate under the direct current voltage of about 6V, dissolving chlorine and H & lt + & gt in water at an anode to enable the water to be acidic, enabling the pH value to be 5.5-6.5, reacting the chlorine with the water to generate hydrochloric acid and hypochlorous acid, enabling the effective chlorine concentration in the water to reach 10-20mg/L, and generating hydrogen at a cathode to finally obtain slightly acidic hypochlorous acid disinfectant water with neutral pH value.
In the step eight, the procedure of removing the disinfection component comprises the following steps:
soda is added to slightly acidic hypochlorous acid sterilized water to generate sodium chloride water and carbon dioxide, and then the sodium chloride water is discharged into a distiller, evaporated and condensed to remove sodium chloride in the water, thereby obtaining distilled water.
The invention has the beneficial effects that: organic matters in the garbage penetrating fluid are absorbed and utilized by the microalgae, and esters and glycerin rich in the microalgae are extracted after the microalgae are mature to prepare liquid fuel, so that the utilization of clean energy is facilitated, and the resource treatment is realized; the water after biological treatment is matched with electrolyte, disinfection is carried out through electrolytic reaction, and then disinfection components are removed to obtain distilled water which can be directly utilized, so that the water resource is convenient to recover.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
As shown in fig. 1, a method for treating, purifying and recycling waste water containing garbage leachate by using biological microalgae comprises the following steps:
the method comprises the following steps: collecting waste water
Directly transporting the waste water of the garbage penetrating fluid from a garbage recycling plant, and carrying out solid-liquid separation on the waste water of the garbage penetrating fluid by using a solid-liquid separator so as to ensure that the waste water of the garbage penetrating fluid does not contain solid garbage;
step two: pretreatment of wastewater
Adding a coagulant into the garbage penetrating fluid wastewater, performing coagulative precipitation treatment, wherein the coagulant is polyacrylamide, the addition amount of the coagulant is determined according to the amount of the wastewater, the input amount of the coagulant is 0.001-0.5g/L of the wastewater, after the coagulative precipitation treatment, adding the waste liquid into an electrolytic tank, adding a composite catalyst and an oxidant, electrifying an anode electrode and a cathode electrode, accelerating oxidation reaction, destroying functional groups of a surfactant dissolved in the water to form flocculated solids, filtering out the flocculated solids, measuring the water quality, performing pretreatment by ammonia stripping when high-concentration ammonia nitrogen exists in the water, and performing pretreatment by adopting an activated carbon adsorption mode when chromaticity, organic matters which are difficult to degrade and heavy metal ions exist in the water;
step three: building a treatment tank
Selecting a flat open ground, digging and building a treatment pool and a microalgae growth pool, building a greenhouse on the two pools, covering 2-3 layers of heat-insulating membranes on the greenhouse for controlling the temperature environment of the treatment pool and the microalgae growth pool, and then pouring the garbage penetrating fluid wastewater into the treatment pool;
step four: biological ceramic treatment
Adding biological ceramic pieces into the treatment pool, wherein the biological ceramic pieces are ceramic pieces consisting of plant fibers, mineral substances, microbial extracts and argil, the addition amount of the biological ceramic pieces is one fourth of the total volume of the waste water of the garbage penetrating fluid, and the microbial film on the biological ceramic pieces reacts with the waste water of the garbage penetrating fluid to absorb organic pollutants in the waste water as nutrient substances for metabolism of the biological ceramic pieces;
step five: aeration treatment
Communicating a vent pipe to the wastewater, communicating one end of the vent pipe with an air pump, aerating the wastewater by using the air pump to increase oxygen, and detecting indexes of CODcr and BOD5 in the wastewater by using an oxygen content detector;
step six: nutrition regulation
When the oxygen content detector detects the living environment of the index composite biological microalgae in the wastewater, stopping aerating the wastewater, simultaneously fishing up the biological ceramic sheets in the treatment pool, then carrying out microfiltration treatment on the wastewater, and adopting a microfiltration membrane with the aperture of 0.3-0.8 mu m for treatment, wherein the microfiltration membrane is any one or a combination of two of a ceramic membrane, a metal membrane and a polymer membrane;
step seven: microalgae treatment and utilization
Introducing the wastewater into a microalgae growth pool, culturing microalgae, wherein the microalgae is selected from one or more of chlorella, scenedesmus, botryococcus, chlamydomonas and spirulina, absorbing and decomposing harmful substances by using organic matters in garbage penetrating fluid, and extracting esters and glycerin rich in the microalgae after the microalgae are mature to prepare liquid fuel;
step eight: water recycling
Electrolyte is added into the water after the microalgae absorption treatment, and an electrified electrode plate performs electrolytic reaction on the electrolyte and the water to generate subacid hypochlorous acid disinfectant water for disinfection, and the specific process is as follows: mixing electrolyte and water into weak brine with acidity, starting an electrode plate to perform electrolytic reaction on the electrolyte and the water, performing fixed-value electrolysis in static complete electrolysis, electrolyzing 1-2% weak brine with the electrode plate under the direct current voltage of about 6V, dissolving chlorine and H & lt + & gt in water at an anode to enable the water to be acidic, wherein the pH value is 5.5-6.5, and reacting the chlorine with the water to generate hydrochloric acid and hypochlorous acid (HCIO) so that the effective chlorine concentration in the water reaches 10-20 mg/L; generating hydrogen by a cathode, finally obtaining the subacidity hypochlorous acid disinfectant fluid with neutral pH value, and then removing the disinfectant components, wherein the specific process comprises the following steps: adding soda into the sterilized water to generate sodium chloride water and carbon dioxide, then discharging the sodium chloride water into a distiller, evaporating and condensing the sodium chloride water, and removing the sodium chloride in the water to obtain distilled water.
The invention mainly utilizes biological pottery and microalgae to carry out biological treatment, firstly carries out coagulation sedimentation physicochemical treatment, oxidation reaction, ammonia stripping and activated carbon adsorption pretreatment to remove toxic impurities in water and avoid influencing the normal operation of the biological treatment, then the microbial film on the biological pottery sheet reacts with garbage penetrating fluid wastewater to absorb organic pollutants in the wastewater as nutrient substances for self metabolism, aeration and oxygenation are matched to build living environment suitable for the microalgae, then the organic substances in the garbage penetrating fluid are absorbed and utilized by the microalgae, in conclusion, the effectiveness of the biological treatment is ensured by regulating the water quality, and the invention utilizes the organic substances in the garbage penetrating fluid to be absorbed and utilized by the microalgae, extracts esters and glycerin rich in the algae after the algae are mature to prepare the microalgae liquid fuel, thereby facilitating the utilization of clean energy and the resource treatment, the invention mixes the water after biological treatment with electrolyte, disinfects by electrolytic reaction, then removes the disinfection component to obtain distilled water which can be directly used, thus facilitating the recovery of water resource.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method for treating, purifying and recycling garbage penetrating fluid wastewater by biological microalgae is characterized by comprising the following steps: the method comprises the following steps:
collecting wastewater: collecting the waste water of the garbage penetrating fluid, and carrying out solid-liquid separation on the waste water of the garbage penetrating fluid by using a solid-liquid separator;
wastewater pretreatment: performing coagulating sedimentation materialization, ammonia stripping and activated carbon adsorption treatment on the garbage penetrating fluid wastewater treated in the step I;
thirdly, constructing a treatment tank: digging a treatment tank and a microalgae growth tank, building a greenhouse on the two tanks, and pouring the garbage penetrating fluid wastewater into the treatment tank;
fourthly, biological ceramic treatment: adding biological ceramic pieces into the treatment pool to absorb organic pollutants in the waste water of the garbage penetrating fluid as nutrient substances for metabolism of the garbage penetrating fluid;
aeration treatment: aerating and oxygenating the waste water of the garbage penetrating fluid by using an air pump, and detecting indexes of CODcr and BOD5 in the waste water of the garbage penetrating fluid by using an oxygen content detector;
sixthly, nutrition regulation: when indexes in the waste water of the garbage penetrating fluid compound with living environment of biological microalgae, stopping aerating the waste water, and fishing out the biological ceramic pieces in the treatment tank;
and seventhly, microalgae treatment and utilization: introducing the waste liquid of the garbage penetrating fluid into a microalgae growth pool, culturing microalgae, and extracting esters and glycerin rich in the microalgae after the microalgae are mature to prepare liquid fuel;
recovery and utilization of water: adding electrolyte into the water after the microalgae absorption treatment, generating electrolytic reaction on the electrolyte and water by electrifying the electrode plates to generate subacidity hypochlorous acid disinfectant fluid, disinfecting the treated water, and removing disinfection components to obtain distilled water.
2. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: the step II comprises the following steps:
(2.1) adding a coagulant into the waste water of the garbage penetrating fluid to perform coagulation and precipitation treatment;
(2.2) after the physical and chemical treatment of the coagulating sedimentation, adding the garbage penetrating fluid wastewater into an electrolytic tank, adding a composite catalyst and an oxidant, electrifying an anode electrode and a cathode electrode, accelerating an oxidation reaction, destroying functional groups of a surfactant dissolved in water, and filtering after forming flocculated solids;
(2.3) measuring the water quality after filtering, and treating by ammonia stripping when high-concentration ammonia nitrogen exists in the water; when the water has chromaticity, organic matters which are difficult to degrade and heavy metal ions, the water is treated by adopting an activated carbon adsorption mode.
3. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 2, wherein: the coagulant is polyacrylamide, the addition amount of the coagulant is determined according to the waste water amount of the garbage penetrating fluid, and the adding amount is 0.001-0.5g/L of the garbage penetrating fluid waste water.
4. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: and in the third step, the greenhouse is covered with 2-3 layers of heat-insulating films.
5. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: in the step IV, the biological ceramic pieces are selected from ceramic pieces consisting of plant fibers, mineral substances, microorganism extracts and argil, and the addition amount of the biological ceramic pieces is one fourth of the total volume of the garbage penetrating fluid wastewater.
6. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: and sixthly, treating the garbage penetrating fluid wastewater after nutrient adjustment by adopting a microfiltration membrane with the aperture of 0.3-0.8 mu m.
7. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 6, wherein: the micro-filtration membrane is any one or a combination of two of a ceramic membrane, a metal membrane and a polymer membrane.
8. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: in the step (c), the microalgae is one or more of chlorella, scenedesmus, botryococcus, chlamydomonas and spirulina.
9. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: in the step eight, the generation process of the slightly acidic hypochlorous acid disinfectant fluid comprises the following steps:
mixing electrolyte and water into weak brine with weak acidity, starting an electrode plate to perform electrolytic reaction on the electrolyte and the water, performing fixed-value electrolysis in static complete electrolysis, electrolyzing 1-2% weak brine with the electrode plate under the direct current voltage of about 6V, dissolving chlorine and H & lt + & gt in water at an anode to enable the water to be acidic, enabling the pH value to be 5.5-6.5, reacting the chlorine with the water to generate hydrochloric acid and hypochlorous acid, enabling the effective chlorine concentration in the water to reach 10-20mg/L, and generating hydrogen at a cathode to finally obtain slightly acidic hypochlorous acid disinfectant water with neutral pH value.
10. The method for biologically microalgae treating, purifying and recycling waste liquid wastewater as claimed in claim 1, wherein: in the step eight, the procedure of removing the disinfection component comprises the following steps: soda is added to slightly acidic hypochlorous acid sterilized water to generate sodium chloride water and carbon dioxide, and then the sodium chloride water is discharged into a distiller, evaporated and condensed to remove sodium chloride in the water, thereby obtaining distilled water.
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| CN115140903A (en) * | 2022-07-26 | 2022-10-04 | 肖睿 | Process for co-treating industrial printing and dyeing wastewater by using activated carbon/chlorella |
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