CN212799826U

CN212799826U - Sewage treatment device, sewage combined treatment device and sewage combined treatment system

Info

Publication number: CN212799826U
Application number: CN202021302260.1U
Authority: CN
Inventors: 石萍
Original assignee: Shenzhen Hailifang Biological Technology Co ltd
Current assignee: Shenzhen Hailifang Biological Technology Co ltd
Priority date: 2019-11-04
Filing date: 2020-07-06
Publication date: 2021-03-26
Anticipated expiration: 2030-07-06
Also published as: CN111792731A

Abstract

The utility model discloses a sewage treatment plant, sewage combined treatment device and processing system. The sewage treatment device comprises a device body and a sewage treatment unit arranged in the device body, wherein the sewage treatment unit comprises hydrothermal carbonized ceramsite; the sewage treatment unit comprises a filler unit and an orifice plate arranged below the filler unit, and the filler unit contains hydrothermal carbonized ceramsite. The sewage treatment device can be changed into a specific functional device according to the working requirement, such as a hydrolysis acidification device, a nitrification device, a denitrification device or a carbonization device, each device operates independently or a plurality of devices operate jointly, and various sewage treatment modes such as biomembrane sewage treatment, aeration, anaerobic treatment and/or aerobic treatment can be realized. The device is suitable for the treatment of domestic sewage, industrial sewage and the like, the treatment efficiency is high, the treated water at least reaches the reclaimed water level, and the treatment cost is low. When the device is used for water circulation, the mass transfer effect can be effectively improved, and the time of a backwashing period can be prolonged.

Description

Sewage treatment device, sewage combined treatment device and sewage combined treatment system

The present application claims priority to a prior application entitled "a wastewater treatment apparatus and treatment process" filed on.11/4/2019 with patent application number 201911067307.2 by the intellectual property office of the chinese country. The entire contents of said prior application are incorporated by reference into the present application.

Technical Field

The utility model belongs to the technical field of sewage treatment, concretely relates to sewage treatment device and treatment process.

Background

Sewage treatment is a process of purifying sewage to meet the requirement of draining a certain water body or reusing the water body, is widely applied to various fields of buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscape, medical treatment, catering and the like, and increasingly enters the daily life of common people. The sewage treatment device is an industrial device which can effectively treat domestic sewage, industrial wastewater and the like in urban areas, prevents sewage and pollutants from directly flowing into water areas, and has important significance for improving ecological environment, promoting urban grade and promoting economic development.

The existing sewage treatment cost and energy consumption conditions have the defects of high energy consumption \ low efficiency and the like, and the treatment capacity and the water quality condition after treatment are relatively unsatisfactory.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sewage treatment device, it includes the device body and sets up this internal sewage treatment unit of device, wherein sewage treatment unit contains hydrothermal carbonization haydite.

According to the utility model discloses an embodiment, sewage treatment unit includes filler unit and sets up the orifice plate in filler unit below. Preferably, the filler units comprise hydrothermally carbonized ceramic grains.

According to an embodiment of the present invention, in the filler unit, the hydrothermal carbonized ceramsite may be present in the filler in an amount of 30-100% by weight, such as 50-90%, such as 60-85%, such as 70-80%, with an exemplary embodiment being 75%.

According to the utility model discloses an embodiment, except that the thermal carbonization haydite, the filler can also contain sponge iron, zeolite, slowly-releasing carbon source and except that at least one in the other haydites of thermal carbonization haydite. Wherein the slow-release carbon source can be selected from at least one of corncobs, straws, biodegradable polymers and the like.

According to an embodiment of the invention, at least a part of the outer surface of at least a part of the filler may also be attached with a biofilm. Preferably, at least a portion of the outer surface of at least a portion of the hydrothermal carbonized ceramsite is covered with a biofilm, preferably at least a portion of the outer surface of the hydrothermal carbonized ceramsite is covered with more than 50% of the biofilm, such as 60%, 70%, 80%, 90% or 100%. More preferably, the weight percentage of the hydrothermal carbonized ceramic granules with the outer surfaces covered by the biofilm to the total hydrothermal carbonized ceramic granules can be more than 50%, such as 60%, 70%, 80%, 90% or 100%.

According to an embodiment of the invention, the thickness of the biofilm may be 1-5mm, such as 2-3 mm.

According to an embodiment of the invention, the biofilm may comprise an anaerobic layer and/or an aerobic layer.

According to an embodiment of the invention, the filling amount of the filler may be 30-95%, such as 60-85%, such as 65-80%, such as 68-75%, and an illustrative example is 80% of the volume of the device from the top of the body to the perforated plate.

According to the utility model discloses an embodiment, the device can set up water inlet and delivery port. Preferably, the water inlet is connected with a water inlet pipeline outside the device, and the water outlet is connected with a water outlet pipeline outside the device. The water inlet pipeline and the water outlet pipeline are optionally communicated or not communicated outside the device, preferably can be communicated as required, so as to realize water body circulation.

According to an exemplary embodiment of the present invention, the water inlet may be positioned higher than the upper surface of the packing, preferably higher than the upper surface of the biofilm; the water outlet may be positioned lower than the lower surface of the packing. For example, the water inlet is positioned at the top of the device body, and the water outlet is arranged at the bottom of the device body.

According to the embodiment of the present invention, the device body may optionally be provided with an aeration port. When present, the aeration port is preferably disposed below the sewage treatment unit, more preferably below the orifice plate. Or an aeration opening can be optionally arranged on the communication pipeline of the water inlet pipeline and the water outlet pipeline so as to realize the function of online aeration.

According to the utility model discloses an embodiment, can also be provided with the overflow mouth on the device body optionally. When present, the overflow outlet is preferably provided in an upper portion of the device body; more preferably, the level of the overflow opening is higher than the level of the water inlet opening.

According to the embodiment of the utility model, a recoil inlet and/or a sewage outlet can be optionally arranged on the device body. Preferably, the backflushing inlet and/or the drain outlet may be independently provided at a sidewall or a bottom surface of the apparatus body, respectively. For example, the backflushing inlet and/or the waste outlet may be located at a level which is independently higher or lower than the level of the water outlet, respectively.

According to the utility model discloses an embodiment, the recoil import is used for letting in the backwash water to the suspended solid that the release sewage treatment unit held back and/or the biomembrane on the renewal filler.

According to the utility model discloses an embodiment, the drain can be used for the suspended solid that the discharge held back, perhaps as reserve delivery port. For example, the waste outlet may also be connected to a waste pipe. Or when the sewage draining exit is used as a standby water outlet, the sewage draining exit can be connected with the water outlet pipeline connected with the water outlet. As an example, the sewage draining pipeline can also be communicated with the water inlet pipeline outside the device body according to the requirement.

According to the utility model discloses an embodiment, can also set up out water detection mouth on the device body optionally, it sets up to go out water detection mouth the lower part of device body. For example, the device body can be connected with a water outlet detection pipeline through the water outlet detection port.

According to the utility model discloses an embodiment, can also set up the bacterial on the device body and insert the mouth optionally.

According to an embodiment of the present invention, the device may further comprise a temperature control element. The temperature control element is preferably used to control the temperature within the device such that the temperature within the device is suitable for the survival, growth and/or maintenance of activity of the species and/or microorganisms in the biofilm layer.

According to an embodiment of the invention, the device may perform different functions or uses, e.g. may be used as an anaerobic treatment device, such as a hydrolytic acidification device or a denitrification device; or may be used as an aerobic treatment apparatus such as a nitrification apparatus or a carbonization apparatus. In this document, devices that perform the same function or purpose are referred to as "same kind of device", and devices that perform different functions or purposes are referred to as "different kind of device".

It will be appreciated by those skilled in the art that when the device is used to perform different functions or uses, it may be inoculated with different bacterial species and/or may be set to different conditions and/or may contain different reagents. For example, when it is used as a hydrolytic acidification device, the inoculated bacterial species may be at least one of hydrolytic acidification bacteria, clostridium, lactococcus, bacillus, lactobacillus, and the like; when it is used as a denitrification device, the inoculated bacterial species are denitrifying bacteria, and may be, for example, at least one selected from the group consisting of Pseudomonas, Alcaligenes, Acheusflexus, Paracoccus denitrificans, Chromobacterium, Thiobacillus denitrificans, Micrococcus, and the like; when it is used as a nitrifying device, the accessible bacterial species may include ammonia-oxidizing bacteria and/or nitrite-oxidizing bacteria, wherein the ammonia-oxidizing bacteria may be selected from at least one of, for example, nitrosomonas, nitrosospira, nitrosophyllum, nitrosovibrio, nitrosococcus, and the like; the nitrite oxidizing bacteria may be at least one selected from the group consisting of, for example, genus Nitrobacter, genus Nitraria, genus Nitrosospirillum, and the like; when the device is used as a carbonizing device, the inoculated strains are aerobic carbonizing bacteria.

According to an embodiment of the present invention, the aperture plate may be provided in one or more. When a plurality of orifice plates are present, the pore size of the different orifice plates may be the same or different, preferably different. For example, when an orifice plate is present, it is in contact with the lower surface of the packing, to support the packing and to perform the filtering function; alternatively, when two or more orifice plates are present, the orifice plate relatively closer to the lower surface of the packing may have a smaller aperture than the orifice plate relatively farther away.

According to an embodiment of the present invention, when an orifice plate is present, the pore size is smaller than the particle size of at least a part of the filler, preferably smaller than the particle size of at least a part of the hydrothermally carbonized ceramic grains, more preferably smaller than D of the filler₁₀Particle size; when two or more perforated plates are present, at least one of the perforated plates has a pore size smaller than the particle size of at least a portion of the filler, preferably smaller than the particle size of at least a portion of the hydrothermally carbonized ceramsite, more preferably smaller than D of the filler₁₀Particle size; preferably, the pore size of the pore plate relatively closer to the lower surface of the filler is smaller than the particle size of at least one part of the filler, preferably smaller than the particle size of at least one part of the hydrothermal carbonized ceramsite, and more preferably smaller than D of the filler₁₀And (4) the particle size. Wherein D is₁₀The particle size means that D is less than D in the filler₁₀The particle volume content of the particle size is 10% of the total filler particles. It will be appreciated that although the pore size of the pore plate is preferably less than the minimum particle size of the total filler, it is not absolutely necessary in some cases, particularly if the minimum particle size filler is present in the total filler in very low amounts (e.g. minimum particle size filler is present in the total filler<1% by volume, or<0.1 vol% or even<0.01 vol.%).

According to an exemplary embodiment of the present invention, the hydrothermal carbonized ceramic grains have an average grain size of 3 to 5 mm. The hole diameter of the hole relatively closer to the lower surface of the filler may be 2mm or more and less than 3mm, for example, the hole diameter is 2.2mm, 2.5mm, 2.7 mm. According to an embodiment of the present invention, the hole diameter of the hole plate relatively farther away from the lower surface of the packing may be larger than 2mm, e.g. 2.5-6mm, 3-5.5 mm.

According to an embodiment of the present invention, the orifice plate may be a planar orifice plate or an arc orifice plate, preferably an arc orifice plate. When the orifice plate is selected from arc-shaped orifice plates, it is preferable that the concave side of the arc-shaped orifice plate faces the packing.

According to the embodiment of the utility model, one, two or more water distributors can be arranged in the device body, and the water inlet and/or the backflushing inlet are/is independently connected with the water distributors. For example, the water distributors may include a first water distributor connected to the water inlet and a second water distributor connected to the backflushing inlet. Further, the first water distributor is arranged above the sewage treatment unit. Further, the second water distributor is arranged below the sewage treatment unit.

According to an embodiment of the invention, the device body may be a suitably shaped container, for example a cylindrical container.

According to the utility model discloses an embodiment, the material of device body is organic glass or other applicable materials.

According to an embodiment of the present invention, the device may optionally further comprise a membrane layer treatment unit. For example, the membrane treatment unit is optionally disposed above or below, preferably above, the wastewater treatment unit.

According to an embodiment of the present invention, the film layer processing unit may be formed of one or more films made of materials known in the art to adsorb toxic substances (e.g., metal ions (such as heavy metal ions), phenol, cyanogen, etc., which have an effect on microbial activity).

According to the utility model discloses an embodiment, go out water detection pipeline can include silk screen hole pipe and detection sensor. The wire mesh hole pipe is arranged at the end part of the water outlet detection pipeline and is positioned in the device body. The detection sensor may be selected from at least one of the following sensors: dissolved oxygen sensors, pH sensors, temperature sensors, turbidity sensors, and the like.

According to the utility model discloses an embodiment, go out water detection pipe and can set up the branch road on the road, preferably set up flowmeter and/or inverter pump on the branch road. Preferably, a bypass port may be provided after the detection sensor to discharge the water qualified for detection through the bypass; and/or the water outlet detection pipeline can be further connected with the water inlet so as to return the outlet water to the device for continuous treatment according to the requirement.

According to an embodiment of the invention, the device further comprises a base for fixing and carrying the device body.

According to the embodiment of the present invention, the device further comprises at least one valve and/or a flow meter, and those skilled in the art can set the valve and/or the flow meter at any one or more positions of the water inlet, the overflow port, the aeration port, the sewage outlet, the water outlet, the backflushing inlet, the water outlet detection pipeline, etc. as required.

According to the embodiment of the present invention, the hydrothermal carbonized ceramsite comprises the following components in parts by weight:

20-100 parts of a hydrothermal carbonization material;

5-60 parts of a bonding material;

0-20 parts of light materials.

According to an embodiment of the invention, the hydrothermal carbon material may be used in an amount of 30-90 parts, 40-80 parts, 45-75 parts, such as 50-70 parts, e.g. 55-65 parts.

According to an embodiment of the present invention, the hydrothermal carbonization material may be in the form of particles, powder, or other forms, preferably powder, and more preferably powder with uniform particle size.

According to an embodiment of the present invention, the hydrothermal carbonization material may have a flocculent lamellar structure and a porous structure.

According to an embodiment of the present invention, the hydrothermal carbonization material has a specific surface area of 4 to 60m²In g, e.g. 10 to 50m²In g, e.g. 20-40m²/g。

According to embodiments of the present invention, the hydrothermal carbonized material may comprise oxygen-containing functional groups including, but not limited to, one or more selected from hydroxyl groups, carboxyl groups, ether linkages, and the like.

According to an embodiment of the invention, the content of organic matter in the hydrothermal carbonization material is 30-40% by weight, such as 31-39%, 32-38%, 33-37%, 34-36%. Wherein, the organic matter comprises but is not limited to humic acid. Preferably, the content of the humic acid accounts for 5-25% of the weight of the sludge hydrothermal carbonization material, such as 7.5-23%, 9-21%, 10-20%, 12-18% and 14-16%.

According to an embodiment of the present invention, the binding material may be used in an amount of 10 to 50 parts, 15 to 45 parts, 20 to 40 parts, or 25 to 35 parts, and examples thereof may be 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50 parts. .

According to embodiments of the present invention, the binding material may be selected from binding components and/or gel components known in the art. For example, the binding material may be selected from one, two or more of cement (e.g. portland cement), clinker, gypsum, water glass, and the like. Further, when the binding material is composed of at least two components, the binding material may include portland cement, gypsum, and water glass.

According to an embodiment of the invention, when the binding material is composed of at least two components, the components may be selected within a wide range. For example, the weight ratio of cement, gypsum, water glass may be (20-45): (1-5): (1-20) as long as the total weight parts thereof satisfy the above-mentioned range. By way of example, the binding material includes 43.5 parts of cement, 2 parts of gypsum, 1.5 parts of water glass; or 23.8 parts of cement, 1.2 parts of gypsum and 10 parts of water glass.

According to an embodiment of the present invention, the amount of the light material may be 0-20 parts, such as 0.1-20 parts, 2-20 parts, 3-15 parts, 5-10 parts, 7-9 parts, such as 8 parts. Preferably, the lightweight material may be used in an amount of 0.

According to an embodiment of the present invention, the lightweight material may be selected from components known in the art, for example the lightweight material may be selected from one, two or more of perlite, silica micropowder, etc. Further, when the lightweight material is composed of at least two components, the components may be in any ratio.

According to an embodiment of the invention, the binding material and the lightweight material are each independently a powder material.

According to the embodiment of the present invention, the specific surface area of the ceramsite is 10m²Per g or more, e.g. 11 m²/g、12m²/g、13m²/g、14m²/g、15m²/g、16m²/g、17m²/g、18m²/g、19m²G or 20m²More than g.

According to an embodiment of the invention, the ceramic particles have a cylinder compressive strength > 3.5MPa, such as > 4MPa, 4.5 MPa.

According to an embodiment of the present invention, the ceramsite comprises humic acid.

According to the embodiment of the utility model, the hydrothermal carbonization material is prepared by taking sludge as a raw material.

Preferably, the water content of the sludge as the raw material is 80 to 95 wt%. Preferably, the sludge as the raw material may not need to be subjected to a drying dehydration treatment. As an example, the source of the sludge may be selected from domestic sludge, such as municipal sewage plant excess sludge.

According to the utility model discloses an embodiment, mud hydrothermal carbonization material is the material that obtains after the hydrothermal carbonization treatment of mud.

According to embodiments of the present invention, the hydrothermal carbonization treatment may be performed at a temperature below 300 ℃, which may be 180-.

According to the embodiment of the present invention, the hydrothermal carbonization treatment may be performed under the condition of adding water. For example, the weight ratio of the dry weight of the sludge as the raw material to the weight of water is (1-5): 10-100, for example, (1-4): 10-80), (2-3): 20-60. Illustratively, the weight ratio of dry weight of sludge to water is 1: 10.

According to an embodiment of the present invention, the hydrothermal carbonization treatment may be performed under stirring. For example, the rotational speed of the stirring can be 500-.

According to an embodiment of the present invention, the pH of the mixture of sludge and water in the hydrothermal carbonization treatment may be between 3 and 11, preferably between 7 and 10, for example 9.

According to a preferred embodiment of the present invention, the hydrothermal carbonization treatment may be performed under the condition that an alkali is added to the mixture of the sludge and the water. The base may be selected from inorganic bases, for example alkali or alkaline earth metal hydroxides, such as KOH and/or NaOH, and the like.

According to an embodiment of the present invention, the reaction time of the hydrothermal carbonization treatment may be 0.5 to 6h, e.g. 1 to 5h, such as 3 h.

According to an embodiment of the present invention, the hydrothermal carbonization treatment further comprises a further post-treatment. The post-treatment may comprise solid-liquid separation of the mixture obtained from the hydrothermal carbonization reaction, followed by washing of the resulting solid to obtain the hydrothermal carbonized material. By way of example, the solid-liquid separation may be achieved using operations known in the art, for example by centrifugation or vacuum filtration. Further, the water content of the sludge hydrothermal carbonization material after solid-liquid separation and dehydration is 50 to 70 wt%, preferably 55 to 65 wt%, for example 60 wt%. Further, the post-treatment may also include washing and drying the resulting solid multiple times.

According to the embodiment of the present invention, the preparation method of the hydrothermal carbonization material comprises: mixing the sludge and water, carrying out hydrothermal reaction under the conditions, cooling to room temperature after the reaction is finished, and carrying out post-treatment to obtain the hydrothermal carbonized material.

According to the utility model discloses an embodiment, hydrothermal carbonization haydite is mud hydrothermal carbonization haydite.

According to the embodiment of the utility model, the sludge hydrothermal carbonization ceramsite comprises the following components in parts by weight:

according to an embodiment of the invention, the water may be used in an amount of 35-45 parts, for example 30 parts.

Preferably, the sludge hydrothermal carbonization material, the binding material and the lightweight material have the meaning as described above.

It should be understood that the recitation of a numerical range in the context of this specification includes the endpoints of that numerical range and each of the numerical values within that numerical range. For example, for the parts by weight numerical ranges of 20-100 parts, 5-60 parts, 2-20 parts, respectively, it should be understood that at least the end points 20, 100, 5, 60, 2, or 20 parts are recited, each integer value within the above ranges, and each of the above integer values independently sums with 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, respectively, as long as the sum does not exceed the corresponding numerical range. By way of example, 20 to 100 parts should be understood as the sum of 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, … … 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100 and 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, … … 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 independently of one another and 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9.

Preferably, the preparation method of the hydrothermal carbonized ceramsite comprises the following steps: mixing the hydrothermal carbonized material, the binding material, the light material and water, granulating, sieving and drying to obtain the hydrothermal carbonized ceramsite.

Preferably, the preparation method further comprises the steps of carrying out room temperature curing and steam curing on the sieved product, and drying to obtain the sludge hydrothermal ceramsite.

According to an embodiment of the invention, the granulation is performed in a granulator. Further, the particles have an average particle size of 1 to 5mm, such as 2 to 4.5mm, 3 to 4 mm.

According to the utility model discloses an embodiment, the condition of room temperature maintenance includes: maintaining the wet gauze at room temperature for 20-30h, such as 22-28h, illustratively, for 24 h; the room temperature is 15-40 deg.C, such as 20-30 deg.C, and illustratively, the room temperature is 25 deg.C. The steam curing conditions include: curing in a still kettle at 50-90 deg.C for 12-20 hr; for example, curing at 60-80 deg.C for 10-20 hr.

According to an embodiment of the invention, the temperature of the drying is room temperature-115 ℃, such as room temperature-110 ℃, room temperature-100 ℃, room temperature-80 ℃ or room temperature-40 ℃, exemplarily, the temperature is 105 ℃. The drying time is 24-48h, such as 30-40h, and illustratively 36 h. Further, the room temperature corresponds to a temperature range of 15-25 ℃.

The utility model provides an application method of the sewage treatment device, which comprises at least one device used for sewage treatment. It should be understood that when the same kind of device is used, one, two or more of the same kind of device may be used, and the two or more of the same kind of device may be used in parallel or in series; alternatively, when two or more different kinds of devices are used, the different kinds of devices may be used in parallel, series, or series-parallel.

It will be appreciated that where two or more of the same type of apparatus are used, or where two or more different types of apparatus are used, the present invention also provides a wastewater treatment complex comprising two or more of the same type of apparatus, or two or more different types of apparatus. Alternatively, the combination may also comprise additional other water treatment or sewage treatment units.

The utility model discloses still provide and contain above-mentioned sewage treatment system, including above-mentioned sewage treatment plant or sewage treatment integrated unit.

According to an embodiment of the present invention, the sewage treatment system may include at least one of an anaerobic treatment device, an aerobic treatment device, an aeration treatment device, or other biological treatment device, etc. Preferably, at least one of the anaerobic treatment device, the aerobic treatment device, the aeration treatment device or other biological treatment devices can be selected from or comprise the sewage treatment device or the sewage treatment combination device.

The utility model also provides a sewage treatment method, which comprises the step of using the sewage treatment device or the combined device to treat sewage. Preferably, in the method, the water inlet pipeline and the water outlet pipeline of at least one sewage treatment device are communicated outside the device to realize water body circulation.

According to the embodiment of the present invention, "circulation" herein means an operation mode in which each device enters the water inlet through the pipeline again after the water treated by the sewage treatment device flows out of the device body during the operation process.

According to the utility model discloses an embodiment, sewage treatment plant's quantity is at least one. When the number of the devices is more than 2, the devices can be operated in series, parallel or series-parallel connection; for example, any two or more of the hydrolysis acidification means, nitrification means, denitrification means and carbonization means may be operated in series, parallel or series-parallel.

According to the embodiment of the utility model, the flow of the circulating water body in the sewage treatment device can be 40-500L/h. For example, the flow rate of the circulating water in the hydrolysis acidification unit can be 50-200L/h, preferably 70-150L/h, and is exemplified by 100L/h. For example, the flow rate of the circulating water body in the nitrification device can be 60-500L/h, preferably 100-300L/h, and exemplary 60L/h, 150L/h, 250L/h and 400L/h. For example, the flow rate of the circulating water body in the denitrification apparatus may be 40-150L/h, preferably 50-130L/h, and exemplarily 100L/h. For example, the flow rate of the circulating water in the carbonization device can be 60-500L/h, preferably 100-300L/h, and exemplary 400L/h.

According to an embodiment of the present invention, the time for each device cycle may be 0.3-2h, such as 0.5-1.5h, with illustrative examples being 0.5h, 1.0 h.

The temperature of the sewage treatment according to the embodiments of the present invention is 20-40 deg.c, for example, 25-35 deg.c, 26-32 deg.c, and the exemplary examples may be 25 deg.c, 30 deg.c, 35 deg.c.

According to the embodiment of the utility model, the on-line aeration rate can be 10-80L/min, such as 15-70L/min, 30-60L/min, exemplary 16L/min, 50L/min, 60L/min during sewage treatment.

According to the embodiment of the present invention, during the denitrification treatment, a carbon source (e.g., at least one of organic substances such as methanol, ethanol, starch, glucose, fructose, sucrose, maltose, lactose, amino acids, formic acid, acetic acid, and sodium acetate) can be added into the denitrification apparatus by an additional method, or a slow-release carbon source (e.g., at least one of corncob, straw, biodegradable polymer, etc.) can be added at the bottom of the solid filler.

According to an exemplary embodiment of the present invention, the sewage treatment method comprises: sequentially treating sewage by a hydrolysis acidification device, a nitrification device, a denitrification device and a carbonization device, wherein the internal water body circulates when each device operates; the hydrolysis acidification device, the nitrification device, the denitrification device and the carbonization device are connected in series. Further, the wastewater may be wholly or partially introduced from a previous device into a next device, for example, 1/2 to 3/4 volumes (e.g., 2/3 volumes) of water into the next device.

According to an exemplary embodiment of the present invention, the sewage treatment method comprises: sewage is treated by a nitrification device and a denitrification device in sequence, and internal water body circulates when each device operates; the nitrification device and the denitrification device are connected in series. Further, the wastewater may be wholly or partially introduced from a previous device into a next device, for example, 1/2 to 3/4 volumes (e.g., 2/3 to 3/4 volumes) of water into the next device.

According to an exemplary embodiment of the present invention, the sewage treatment method comprises: after the sewage is treated by a carbonization, nitrification or denitrification device, the sewage is directly discharged; or the sewage is sequentially treated by a carbonization device, a nitrification device and a denitrification device, the carbonization device, the nitrification device and the denitrification device are connected in series, and the internal water body circulates when each device operates. Further, the wastewater may be fed in whole or in part from the previous device to the next device, for example, 1/2-3/4 volumes of water are fed to the next device.

According to an embodiment of the present invention, the sewage may be at least one of domestic sewage, industrial wastewater, commercial sewage, and the like, for example, domestic sewage. Further, the COD in the sewage is 100-300mg/L (such as 200-250mg/L), the ammonia nitrogen is 50-100mg/L (such as 60-90mg/L), for example, the COD is 220-280mg/L, the ammonia nitrogen is 60-80mg/L, exemplarily, the COD in the sewage is 250mg/L, and the ammonia nitrogen is 60 mg/L.

The utility model has the advantages that:

the utility model provides a sewage treatment plant can be according to the work needs, the transform is specific functional device, like hydrolysis acidification device, nitrify device, denitrification facility or carbonization device, each device can independent operation or a plurality of device joint operation, can realize multiple sewage treatment modes such as biomembrane sewage treatment, aeration, anaerobism and/or good oxygen. The device is suitable for the treatment of domestic sewage, industrial sewage and the like, the treatment efficiency is high, the treated water at least reaches the reclaimed water level, and the treatment cost is low.

Moreover, when the water body of the sewage treatment device of the utility model circulates, the mass transfer effect can be effectively improved, and the filler is not easy to block due to the higher flow velocity; furthermore, the circulation can also make the dissolved oxygen in the water body more uniformly distributed and improve the dissolved oxygen at the bottom. The supply of the carbon source to the denitrification device is also different from the traditional reflux. The method not only provides necessary carbon source for the denitrification device, but also improves the treatment efficiency. In addition, the hydrolysis acidification device can further degrade macromolecules in the sewage, is beneficial to the degradation of the carbonization device, and increases the shock resistance of the system.

Drawings

FIG. 1 is a schematic view of the sewage treatment apparatus according to embodiment 1.

FIG. 2 is a schematic view of the sewage treatment apparatus according to embodiment 1.

Reference numerals: 1-water inlet, 2-solid filler, 3-first pore plate, 4-second pore plate, 5-water distributor, 6-water outlet, 7-base and 8-device body.

FIG. 3 is a graph showing the effect of different circulating flow rates on the nitrate nitrogen conversion in example 4, wherein the histograms at each time point are 60L/H, 150L/H, 250L/H, and 400L/H from left to right.

FIG. 4 is a graph showing the effect of different circulation flows on ammonia nitrogen removal in example 4, wherein the endpoints at 1H are curves corresponding to 60L/H, 250L/H, 150L/H, and 400L/H from bottom to top, respectively.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following embodiments. It is to be understood that the following examples are illustrative only and are not to be construed as limiting the scope of the invention. All the technologies realized based on the above mentioned contents of the present invention are covered in the protection scope of the present invention.

Unless otherwise indicated, the raw materials and reagents used in the following examples are all commercially available products or can be prepared by known methods.

The preparation process of the sludge hydrothermal carbonized ceramsite used in the embodiment comprises the following steps:

1. mixing materials: after all the materials are ground and dried, the following mixture ratio is adopted:

45 parts of hydrothermal carbonization material, 43.5 parts of bonding material (cement, 1.5 parts of water glass and 2 parts of gypsum) and 8 parts of light material (expanded perlite), wherein 40mL of water is added into each 100g of raw material, and the raw materials are uniformly mixed;

2. molding: adding water into the uniformly mixed powder in the step 1, granulating in a granulator, and sieving to obtain particles with the particle size of 2-3 mm-3-5 mm;

3. and (5) maintenance: the granules are maintained for 24 hours by wet gauze at room temperature, put into an autoclave for maintenance, and maintained for 12 hours at 60 ℃;

4. and (3) drying: and naturally drying at room temperature to obtain the sludge hydrothermal carbonized ceramsite.

Wherein the preparation process of the sludge hydrothermal carbonization material comprises the following steps: according to the weight ratio of the dry weight of the sludge to the water of 1:10, placing the sludge and the water which are not subjected to drying and dehydration treatment in a hydrothermal reaction kettle, adding sodium hydroxide to a regulating system, wherein the pH value is 9, the reaction temperature is 200 ℃, the stirring speed is 800rpm, and the reaction time is 3 hours. After the reaction is finished, cooling to room temperature, centrifuging the hydrothermal carbonization liquid at 3000r/min for solid-liquid separation, and washing and drying the solid product for a plurality of times to obtain the sludge hydrothermal carbonization material. Tests show that the sludge hydrothermal carbonization material has a flocculent lamellar structure and a porous structure, and the specific surface area of the material is 45m²The content of oxygen-containing functional groups (including hydroxyl, carboxyl and ether bonds) is 30-40% by mass, and the content of humic acid is 5-25% by mass.

The physical properties of the sludge hydrothermal carbonized ceramsite are as follows: the specific surface area is more than or equal to 10m²G, barrel pressure Strength>3.5Mpa。

Example 1

The sewage treatment device as shown in fig. 1 comprises a device body 8 and a sewage filler treatment unit arranged in the device body 1; the device body 8 is a cylindrical container made of organic glass.

The sewage filler treatment unit comprises a solid filler 2, a first pore plate 3 and a second pore plate 4, wherein the first pore plate 3 and the second pore plate are both arranged below the solid filler 2, the solid filler 2 comprises sludge hydrothermal carbonized ceramsite (the particle size of the ceramsite is 3-5mm), and the filling amount of the solid filler 2 is 80% of the height of the device body 1.

The first pore plate 3 is contacted with the solid filler 2 and used for supporting the solid filler and filtering sewage, the aperture of the first pore plate 3 is 2mm, and the aperture of the second pore plate 4 is 3 mm. The first orifice plate 3 and the second orifice plate 4 are both arc-shaped plates.

The device body 8 is provided with a water inlet 1 and a water outlet 6, the water inlet 1 is positioned at the top of the device body 8, the water outlet 6 is arranged at the bottom of the device body 8, and the water inlet 1 is communicated with the water outlet 6. The device body 8 is internally provided with a water distributor 5, the water inlet 1 is connected with the water distributor 5, and the water distributor 5 is arranged above the sewage filler treatment unit.

In the use process of the device, a biological film is formed on the surface layer of the sludge hydrothermal carbonized ceramsite, the thickness of the biological film layer is 2-3mm, and the biological film layer comprises an anaerobic layer and an aerobic layer.

Sewage enters the device body from the water inlet and is uniformly sprayed on the solid filler through the distributor.

The device of the embodiment can be used as a denitrification device or a hydrolysis acidification device.

Wherein the solid fillers in the denitrification device and the hydrolysis acidification device respectively comprise sludge hydrothermal carbonized ceramsite and sponge iron with the mass ratio of 3:1, and the particle size of the sponge iron is 3-5 mm.

Example 2

As shown in FIG. 2, the sewage treatment apparatus of the present embodiment is different from that of embodiment 1 in that: an online aeration port is arranged on a connecting pipeline of the water inlet 1 and the water outlet 6, and air introduced from the aeration port is returned to the device body from the water inlet 1 after contacting with sewage, and then is subjected to full contact reaction with organic pollutants in circulating water through the solid filler, so that the degradation of the organic pollutants is realized.

The solid filler comprises: the mass ratio of the sludge hydrothermal carbonized ceramsite to the zeolite is 3: 1.

The apparatus of this example can be used as a nitrification apparatus or a carbonization apparatus.

Example 3

The difference from example 1 is that: the heating component is arranged on the device, so that the temperature in the device is suitable for the survival, growth and high activity maintenance of strains and microorganisms in the biofilm layer.

Example 4

The sewage treatment method of different devices comprises the following steps:

(1) a hydrolysis acidification device: raw water (domestic sewage, wherein COD is 250mg/L, ammonia nitrogen is 60mg/L) is injected into the device, the device runs for 1h, and when the device runs, the internal water body of the device circulates (the circulation flow is 100L/h), and water is directly discharged or enters a carbonization device; the treatment temperature is 30 ℃;

(2) a nitrifying device: raw water (domestic sewage, wherein COD is 250mg/L, ammonia nitrogen is 60mg/L) is injected into the device, the device runs for 1h, the internal water body of the device circulates (the circulation flow is 250L/h) when the device runs, and meanwhile, online aeration (the gas flow is 60L/min) is carried out to discharge water; the treatment temperature is 30 ℃;

(3) a denitrification device: injecting nitrified water into a denitrification device, adding an external carbon source (wherein nitrate nitrogen is 30mg/L, and COD (chemical oxygen demand) by supplementing the carbon source is 120mg/L), running for 1h, circulating internal water (circulation flow is 100L/h) during running, and discharging water at the treatment temperature of 35 ℃;

(4) a carbonization device: raw water (domestic sewage, wherein COD is 250mg/L, ammonia nitrogen is 60mg/L) or hydrolysis acidification effluent is injected into the device, the device runs for 1h, internal self-circulation (circulation flow is 400L/h) is carried out during running, meanwhile, online aeration (gas flow is 60L/min) is carried out, and the effluent is discharged.

Wherein, the hydrolysis and acidification device is the device in the embodiment 1, and the inoculated strains are as follows: hydrolyzing acidifying bacteria;

the nitrifying device is the device in example 2, and the inoculated strains are as follows: nitrosomonas and nitrobacter;

the denitrification device is the device in the embodiment 1, and the inoculated strains are as follows: pseudomonas bacteria;

the carbonization device is the device in example 2, and the inoculated strains are as follows: aerobic carbonization bacteria.

Single device water quality treatment results:

a hydrolysis acidification device: the COD removal rate of the carbonization device can be improved by 20% by combining with the carbonization device;

a nitrifying device: the average treatment capacity of ammonia nitrogen is 0.4kg/m³D (effective volume per unit time treatment efficiency);

a denitrification device: the average treatment amount of nitrate nitrogen is 0.2kg/m³D (effective volume per unit time treatment efficiency);

a carbonization device: based on the water inlet of raw water, the average COD treatment capacity is 1kg/m³D (effective volume per unit time treatment efficiency);

wherein, the nitration device is operated:

(a) the influence of different gas flows on ammonia nitrogen removal is shown in table 1:

TABLE 1

Table 1 illustrates that increased aeration gas flow rates can significantly improve ammonia nitrogen removal.

(b) The effect of different recycle flows on nitrate nitrogen conversion is shown in table 2 and figure 3:

TABLE 2

As can be seen from the table 2 and the figure 3, in the interval of the circulating water body flow rate of 60-250L/h, the accumulation concentration of the nitrate nitrogen can be improved by increasing the circulating flow rate. However, when the flow rate exceeds 250L/h, the accumulation of nitrate nitrogen is not obvious, but the accumulation is reduced, and 250L/h is the fixed circulation flow rate of the nitrification device.

(c) The effect of different circulation flow rates on ammonia nitrogen removal is shown in table 3 and figure 4:

TABLE 3

As can be seen from table 3 and fig. 4, the increase in the circulation flow rate generally shows a tendency to improve the removal rate of ammonia nitrogen.

(d) The effect of the circulation flow rate on the dissolved oxygen level is shown in table 4:

TABLE 4

As can be seen from Table 4, the increase of the circulation flow can greatly increase the dissolved oxygen content of the effluent and promote the nitrification in the device.

(II) when the denitrification device is operated:

the effect of different circulation flows on the nitrate nitrogen removal efficiency is shown in table 5:

TABLE 5

Circulation flow (L/h)	40	70	100	130
					Removal rate of nitrate nitrogen	66.6％	77.5％	91.5％	66.4％

As can be seen from Table 5, the removal of nitrate nitrogen is promoted by increasing the circulation flow within a certain range, and when the flow rate is 100L/h, the removal effect is optimal, and the removal rate is more than 90%.

Example 5

The sewage treatment method with three devices connected in series comprises the following steps:

(1) a carbonization device: raw water is injected into the device, the device runs for 1h, internal water body circulates (the circulation flow is 400L/h) during running, meanwhile, online aeration is carried out (the gas flow is 60L/min), and all the discharged water enters the nitrification device;

(2) a nitrifying device: all the effluent water in the step (1) enters a denitrification device, raw water is supplemented, internal water body circulation (circulation flow is 250L/h) is carried out during operation, meanwhile, online aeration (gas flow is 60L/min) is carried out, and the treatment temperature is 30 ℃;

(3) a denitrification device: adding a carbon source into the denitrification device in an additional mode, running for 1h, circulating the internal water body in the running process (the circulating flow is 100L/h), treating the water at the temperature of 35 ℃, and discharging the water.

The water quality treatment results of the series device of the embodiment (inlet water COD 250mg/L, ammonia nitrogen 90mg/L, carbon source addition amount is COD 50-60 mg/L):

sewage treatment capacity: 2.83 ton/m³D (effective volume per unit time treatment efficiency);

the average COD treatment amount was 0.57kg/m³D (effective volume per unit time treatment efficiency);

the average ammonia nitrogen treatment capacity is 0.16kg/m³D (effective volume per unit time treatment efficiency);

the average total nitrogen treatment amount was 0.15kg/m³D (effective volume per unit time processing efficiency).

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device is characterized by comprising a device body and a sewage treatment unit arranged in the device body, wherein the sewage treatment unit comprises hydrothermal carbonized ceramsite;

the sewage treatment unit comprises a filler unit and a pore plate arranged below the filler unit;

the filler unit comprises hydrothermal carbonized ceramsite.

2. The sewage treatment device according to claim 1, wherein in the filler unit, the hydrothermal carbonized ceramsite accounts for 30-100% of the filler by mass;

the filler comprises at least one of sponge iron, zeolite and a slow-release carbon source in addition to the hydrothermal carbonized ceramsite;

at least a portion of the outer surface of at least a portion of the filler is attached with a biofilm;

the filling amount of the filler is 30-95% of the volume of the device from the top of the body to the orifice plate.

3. The wastewater treatment apparatus according to claim 1, wherein said apparatus is provided with a water inlet and a water outlet; the water inlet is connected with a water inlet pipeline outside the device, and the water outlet is connected with a water outlet pipeline outside the device; wherein the water inlet pipeline and the water outlet pipeline are optionally communicated or not communicated outside the device.

4. The wastewater treatment plant according to claim 3, wherein the water inlet conduit and the water outlet conduit are in communication outside the plant for circulation of the body of water.

5. The wastewater treatment device according to claim 1, wherein an aeration opening is optionally further provided on the device body;

the device body is also optionally provided with an overflow port;

the device body is also optionally provided with a backflushing inlet and/or a sewage outlet;

the device body is also optionally provided with a water outlet detection port;

the device body is also optionally provided with a strain access port;

the device also includes a temperature control element.

6. The wastewater treatment device according to claim 3, wherein an aeration opening is optionally arranged on the communication pipeline of the water inlet pipeline and the water outlet pipeline.

7. The wastewater treatment device according to claim 3, wherein a backflushing inlet and/or a sewage outlet are optionally provided on the device body.

8. The wastewater treatment apparatus according to any of claims 1-7, wherein the apparatus is capable of performing different functions or uses: as an anaerobic treatment device or as an aerobic treatment device.

9. The wastewater treatment plant according to claim 8, wherein the anaerobic treatment plant is a hydrolytic acidification plant or a denitrification plant;

when the strain is used as a hydrolytic acidification device, the inoculated strain is at least one of hydrolytic acidification bacteria, clostridium, lactococcus, bacillus and lactobacillus;

when the microorganism is used as a denitrification device, the inoculated strain is denitrifying bacteria, and the denitrifying bacteria is at least one of pseudomonas, alcaligenes, geldanella, paracoccus denitrificans, chromobacterium, thiobacillus denitrificans and micrococcus;

the aerobic treatment device is a nitrification device or a carbonization device;

when the nitrifying device is used, the inoculated strains comprise ammonia oxidizing bacteria and/or nitrite oxidizing bacteria;

when the strain is used as a carbonization device, the inoculated strain is aerobic carbonization bacteria.

10. The wastewater treatment apparatus according to claim 7, wherein the orifice plate is provided in one or more number; when a plurality of orifice plates are present, the pore sizes of the different orifice plates are the same or different;

the pore plate is a plane pore plate or an arc pore plate;

one, two or more water distributors are also arranged in the device body, and the water inlet and/or the backflushing inlet are/is independently connected with the water distributors;

the device also optionally includes a film layer treatment unit;

the material of the membrane is a material known in the art to be capable of adsorbing toxic substances.

11. The wastewater treatment apparatus according to claim 10, wherein when a plurality of orifice plates are present, the pore diameters of different orifice plates are different.

12. An integrated wastewater treatment plant, characterized in that it comprises two or more plants of the same species as claimed in any one of claims 1 to 11, or two or more plants of different species as claimed in any one of claims 1 to 11;

the combination may also comprise additional water or sewage treatment units.

13. A wastewater treatment system comprising the wastewater treatment plant of any of claims 1-11 or the combined wastewater treatment plant of claim 12.