Sewage treatment system for enhancing sludge settleability based on powder carbon carrier induction

Abstract

The utility model provides a sewage treatment system for enhancing sludge settleability based on powder carbon carrier induction, and relates to the field of sewage treatment. The system comprises a sewage area, a sewage biochemical treatment area, a powder carbon adding point location, a rapid muddy water settling area and a muddy water settling area, the sewage area is sequentially communicated with the sewage biochemical treatment area, the rapid muddy water settling area and the muddy water settling area, and the sewage biochemical treatment area comprises an anaerobic area, an anoxic area and an aerobic area, powdered carbon adding point positions are arranged beside the anoxic zone and the aerobic zone, a sludge backflow zone is arranged on one side of the muddy water settling zone, and sludge in the sludge backflow zone flows back to the anaerobic zone of the sewage biochemical treatment zone. A certain amount of powder carbon with a porous structure is added into the anoxic zone and the aerobic zone of the biochemical treatment section, and the settleability and the performance of the activated sludge can be improved at a lower cost by utilizing the adsorbability and the induction performance of the powder carbon on microorganisms.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of sewage treatment, and it is a sewage treatment system based on powder carbon carrier for inducing and strengthening sludge settling property. BACKGROUND

[0002] The activated sludge method is the most commonly used sewage biochemical treatment technology in the current urban sewage plant, and has the advantages of investment saving, high treatment efficiency and the like.

[0003] The removal of pollutants in sewage through microbial metabolism and the rapid separation of sludge and water in the sedimentation tank are two core problems of sewage biochemical treatment.

[0004] The upper limit of the activated sludge concentration is determined by the sludge settling property in the sedimentation tank to some extent. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims to provide a sewage treatment system based on powder carbon carrier for inducing and strengthening sludge settling property to solve the problem of unstable sludge settling property in the biochemical sewage treatment plant leading to substandard operation.

[0006] The utility model provides a sewage treatment system based on powder charcoal carrier induces enhanced sludge settleability, including sewage area, sewage biochemical treatment area, powder charcoal carrier adds point position, fast sludge water precipitation area, sludge water precipitation area and sludge backflow area, the sewage area is linked with sewage biochemical treatment area, fast sludge water precipitation area, sludge water precipitation area in proper order, the sewage biochemical treatment area includes anaerobic zone, the anoxic zone and the aerobic zone of setting up in pairs in series or in parallel and communicate in proper order, sets up powder charcoal adds point position at the anoxic zone and the aerobic zone side, sludge backflow area is set up to the sludge water precipitation area one side, the sludge backflow area sludge backflow to the anaerobic zone of sewage biochemical treatment area.

[0007] According to the technical scheme of the utility model, wherein, the sewage biochemical treatment area includes the anaerobic zone, the anoxic zone and the aerobic zone which communicate in proper order and are set up in pairs in series or in parallel, the anoxic zone and the aerobic zone can be set to one level or multiple levels according to actual conditions.

[0008] According to the technical scheme of the utility model, wherein, the powder charcoal carrier adds point position is set at the anoxic zone and the aerobic zone side, and the powder charcoal adding device preferably uses a dry jet adding device.

[0009] According to the technical scheme of the utility model, wherein, the fast sludge water precipitation area can be set in pairs in parallel, or only one can be set, and a circular precipitation device is preferably used.

[0010] According to the technical scheme of the utility model, wherein, the sludge water precipitation area can be set in pairs in parallel, or only one can be set, and a circular precipitation tank is preferably used.

[0011] The technical scheme of the utility model has the following advantages:

[0012] By adding the powder charcoal with a porous structure to the anoxic zone and the aerobic zone of the biochemical treatment section, the adsorption and the induction performance of microorganisms are utilized to improve the settling performance and the performance of the activated sludge at a low cost; by setting the biochemical treatment area and the activated carbon adding point position in pairs in series or in parallel, the powder charcoal adding amount can be determined more comparably, more flexibly and more accurately, and the operation cost of the powder charcoal adding is further optimized; the powder charcoal adding device adopts a dry jet mode, and the powder charcoal escape is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiments of the utility model or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art,

[0014] Without paying the creative labor, other drawings can also be obtained according to these drawings.

[0015] Figure 1 The sewage treatment system block diagram provided by the utility model based on powder carbon carrier induced enhanced sludge sedimentation, wherein each pair of anoxic zone and aerobic zone is arranged in parallel.

[0016] Figure 2 The sewage treatment system block diagram provided by the utility model based on powder carbon carrier induced enhanced sludge sedimentation, wherein each pair of anoxic zone and aerobic zone is arranged in series.

[0017] Figure 3 The sewage treatment system block diagram provided by the utility model based on powder carbon carrier induced enhanced sludge sedimentation, wherein each pair of anoxic zone, aerobic zone, rapid sludge and water precipitation zone and sludge and water precipitation zone is arranged in parallel. DETAILED DESCRIPTION

[0018] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] In the description of the utility model, it is necessary to explain that unless there is explicit provision and limitation, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] In addition, the technical features involved in different embodiments of the utility model described below can be combined as long as there is no conflict between them.

[0021] As Figure 1As shown, in this wastewater treatment system based on powdered carbon carrier-induced enhanced sludge settling, anoxic and aerobic zones are connected in parallel. Wastewater enters the anaerobic zone and the parallel anoxic and aerobic zones from the wastewater zone. Powdered carbon carrier dosing points are set up next to the anoxic and aerobic zones, and powdered carbon carrier is added to them. The sludge and water from the two parallel aerobic zones mix and enter the rapid sludge-water sedimentation zone, where sludge and water are rapidly separated. Sludge that can settle quickly and has good settling properties is returned to the anaerobic zone. The added powdered carbon carrier further enhances the sludge settling properties of the system. The remaining sludge enters the sludge-water sedimentation zone for further sludge-water separation. The sludge settles at the bottom of the sludge-water sedimentation zone and enters the sludge return zone to return to the anaerobic zone. The clear water at the top of the sludge-water sedimentation zone is used as the system effluent, completing the entire wastewater treatment process.

[0022] like Figure 2 As shown, the wastewater treatment system based on powdered carbon carrier-induced enhanced sludge settling has an anoxic zone and an aerobic zone connected in series. Wastewater enters the anaerobic zone, then the two-stage anoxic zone and aerobic zone connected in series, in the following order: anaerobic zone, anoxic zone, aerobic zone, anoxic zone, aerobic zone, and aerobic zone. Powdered carbon carrier dosing points are set up next to the anoxic and aerobic zones, and powdered carbon carrier is added to the anoxic and aerobic zones respectively. The sludge in the aerobic zone enters the rapid sludge-water sedimentation zone, where sludge and water are rapidly separated. Sludge that can settle quickly and has good settling properties is returned to the anaerobic zone. The added powdered carbon carrier further enhances the sludge settling properties of the system. The remaining sludge enters the sludge-water sedimentation zone for further sludge-water separation. The sludge settles at the bottom of the sludge-water sedimentation zone and enters the sludge return zone to return to the anaerobic zone. The clear water at the top of the sludge-water sedimentation zone is used as the system effluent, completing the entire wastewater treatment process.

[0023] In this embodiment, the amount of powdered carbon carrier added in the primary anoxic zone and aerobic zone is greater than that in the secondary anoxic zone and aerobic zone. The amount of powdered carbon added in the primary anoxic zone and aerobic zone is approximately 30 ml / L.

[0024] The dosage in the secondary anoxic and aerobic zones is 30-50% less than that in the primary zone, which ensures a better effect in inducing and enhancing sludge settling.

[0025] like Figure 3As shown, the sewage treatment system based on powder carbon carrier to induce enhanced sludge settling property, the anoxic zone, the aerobic zone, the sludge and water sedimentation zone and the sludge and water sedimentation zone are respectively and in parallel arranged in pairs. The wastewater from the sewage zone enters the anaerobic zone, the anoxic zone, the aerobic zone, the rapid sludge and water sedimentation zone, and the sludge and water sedimentation zone arranged in pairs in parallel, respectively. Independent powder carbon carrier adding points are arranged beside the parallel anoxic zone and aerobic zone, respectively, and powder carbon carriers are added to the paired anoxic zone and aerobic zone, respectively. The sludge and water in the aerobic zone enter the corresponding rapid sludge and water sedimentation zone, where the sludge and water are rapidly separated, and the sludge with good settling property can be quickly settled and returned to the anaerobic zone in a short time. The added powder carbon carrier is beneficial to further enhancing the sludge settling property of the system. The rest of the sludge and water enters the sludge and water sedimentation zone for further separation of the sludge and water. The sludge is deposited at the bottom of the sludge and water sedimentation zone and enters the sludge return zone to return to the corresponding anaerobic zone. The clear water at the upper part of the sludge and water sedimentation zone is used as the system effluent, and the entire sewage treatment process of the system is completed.

[0026] In the present embodiment, the powder carbon adding point can share a set of system or can be provided with two independent systems respectively. When the independent carbon adding system is used, different amounts of powder carbon can be added to the anoxic zone and the aerobic zone flexibly and accurately, respectively. The amount of powder carbon carrier added is adjusted respectively by observing and detecting the sludge settling property in the rapid sludge and water sedimentation zone and the sludge and water sedimentation zone. In the present embodiment, no powder carbon is added to the anaerobic zone, the amount of powder carbon added to the anoxic zone is about 20 mg / L, and the amount of powder carbon added to the aerobic zone is about 20 mg / L. According to the change of the sludge settling property, the amount of activated carbon carrier added can be appropriately increased or decreased, but considering the stable operation of the system, the change range should not be too large, and it is appropriate that the change range does not exceed 20%. After adjusting the amount of carbon added each time, the change of the sewage treatment system is observed for at least one week.

[0027] Obviously, the above embodiments are only examples for clear illustration, and are not limitations on the embodiments. Other different forms of changes or variations can be made by those skilled in the art on the basis of the above description. All the embodiments do not need to be exhausted here. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A sewage treatment system based on powder activated carbon carrier to induce enhanced sludge settling properties, comprising a sewage area, a sewage biochemical treatment area, a powder activated carbon dosing point, a rapid sludge and water sedimentation area and a sludge and water sedimentation area, characterized in that: The sewage area is communicated with a sewage biochemical treatment area, a rapid sludge and water sedimentation area and a sludge sedimentation area in sequence, the sewage biochemical treatment area comprises an anaerobic area, a pair of series or parallel arranged anoxic areas and aerobic areas communicated in sequence, powder carbon adding points are arranged beside the anoxic areas and the aerobic areas, powder carbon adding devices are used to add powder carbon to the anoxic areas and the aerobic areas, a sludge return area is arranged on one side of the sludge sedimentation area, and sludge in the sludge return area returns to the anaerobic area of the sewage biochemical treatment area. ​ 2. The sewage treatment system based on powder carbon carrier inducing enhanced sludge settleability according to claim 1, characterized in that: The powder carbon adding device is preferably a dry method jet adding device.

3. The sewage treatment system based on powder carbon carrier inducing enhanced sludge settleability according to claim 1, characterized in that: The rapid sludge and water sedimentation area is preferably a circular sedimentation device.

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