WO2022233331A1 - 一种促进连续流好氧颗粒污泥两级沉淀的方法及系统 - Google Patents

一种促进连续流好氧颗粒污泥两级沉淀的方法及系统 Download PDF

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WO2022233331A1
WO2022233331A1 PCT/CN2022/091329 CN2022091329W WO2022233331A1 WO 2022233331 A1 WO2022233331 A1 WO 2022233331A1 CN 2022091329 W CN2022091329 W CN 2022091329W WO 2022233331 A1 WO2022233331 A1 WO 2022233331A1
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Prior art keywords
sludge
inclined plate
sedimentation tank
granular sludge
tank
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PCT/CN2022/091329
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English (en)
French (fr)
Inventor
张建三
李军
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艾柯环保技术(杭州)有限公司
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Priority claimed from CN202120953416.0U external-priority patent/CN215209006U/zh
Priority claimed from CN202110493015.6A external-priority patent/CN113149194A/zh
Application filed by 艾柯环保技术(杭州)有限公司 filed Critical 艾柯环保技术(杭州)有限公司
Priority to US18/287,312 priority Critical patent/US20240190738A1/en
Priority to EP22798671.8A priority patent/EP4317087A4/en
Publication of WO2022233331A1 publication Critical patent/WO2022233331A1/zh

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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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge 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
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1205—Particular type of activated sludge processes
    • C02F3/1215—Combinations of activated sludge treatment with precipitation, flocculation, coagulation and separation of phosphates
    • 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
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the invention relates to a method and a system for promoting the precipitation of aerobic granular sludge, in particular to a method and a system for promoting the two-stage precipitation of continuous flow aerobic granular sludge, and belongs to the field of sewage treatment.
  • Aerobic granular sludge technology is a new type of wastewater treatment technology with good sedimentation performance, high sludge concentration, and can better withstand high organic loads, toxic and harmful substances, shock loads, etc. s concern.
  • the formation mechanism of aerobic granular sludge is complex, including physical, chemical and biological interactions. Generally, the formation process can be regarded as the phenomenon of biological aggregation formed by the self-fixation of microorganisms under certain conditions of hydrodynamics and selective pressure. .
  • the current research shows that the aerobic granular sludge method, as an extension and improvement process of the currently widely used activated sludge process, has a good and stable total nitrogen removal effect, and can significantly reduce the amount of excess sludge produced, but in addition to
  • the phosphorus mechanism is relatively complex, and there is a certain contradiction between the optimal conditions for particle growth and the growth environment requirements of typical phosphorus-accumulating microorganisms, which cannot meet the effluent requirements that have been greatly improved, especially the total phosphorus content.
  • the way of adding chemical coagulant will affect the formation conditions of granular sludge and the effect of total nitrogen treatment.
  • the purpose of the present invention is to provide a method for promoting two-stage precipitation of continuous flow aerobic granular sludge, so as to obtain a higher final solid suspended solids removal rate and solve the problems described in the background art.
  • Another object of the present invention is to provide a system for promoting two-stage sedimentation of continuous-flow aerobic granular sludge, so as to obtain a higher final suspended solids removal rate and achieve a smaller footprint.
  • a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge comprising the following steps:
  • the biochemical reaction tank, the granular sludge sedimentation tank and the inclined plate sedimentation tank are connected in sequence, and the inclined plate device is arranged in the inclined plate sedimentation tank;
  • step (3) The lighter flocculent sludge in the mud-water mixture in step (2) flows into the inclined plate sedimentation tank, and the sludge after accelerated separation by the inclined plate device is collected and discharged at the lower part of the inclined plate sedimentation tank.
  • the inclined plate device is arranged in the middle of the inclined plate sedimentation tank.
  • the inclined plate device includes a plurality of inclined plates arranged in parallel.
  • the inclined plate is an engineering plastic plate or a stainless steel plate.
  • the inclined plate is a polypropylene plate.
  • the inclined plate device includes a plurality of inclined tubes arranged in parallel.
  • the bottom of the granular sludge sedimentation tank is provided with a sludge return pipe connected to the biochemical reaction tank.
  • a chemical dosing device connected to the front end of the inclined plate sedimentation tank is provided outside the inclined plate sedimentation tank, so that the lighter flocculent pollutants in the mud-water mixture in the step (2) are made.
  • the coagulant is added to the front end of the inclined plate sedimentation tank through the chemical dosing device.
  • a system for promoting two-stage sedimentation of continuous flow aerobic granular sludge comprising a biochemical reaction tank, a granular sludge sedimentation tank and an inclined plate sedimentation tank arranged in sequence, and the bottom of the granular sludge sedimentation tank is connected to the biochemical reaction tank.
  • the sludge return pipe of the inclined plate sedimentation tank is provided with an inclined plate device for promoting the aggregation of the micro flocculent suspended matter into larger flocs.
  • the inclined plate device includes a plurality of inclined plates arranged in parallel, the inclined direction of the inclined plates faces the water outlet direction of the inclined plate sedimentation tank, and a clarifying and separation zone is formed between the several inclined plates.
  • the inclined plate device includes a plurality of inclined plates arranged in parallel, the inclined direction of the inclined pipes is oriented towards the water outlet direction of the inclined plate sedimentation tank, and a clarifying and separation zone is formed between the several inclined pipes.
  • the inclined plate is an engineering plastic plate or a stainless steel plate.
  • the inclined plate is a polypropylene plate.
  • the top of the inclined plate sedimentation tank is provided with a dosing port, and the outside of the inclined plate sedimentation tank is provided with a drug dosing device which is connected to the drug addition port.
  • the inclined plate sedimentation tank is provided with several vertical plates, the vertical plates are arranged below the dosing port, and the several vertical plates are enclosed with the wall of the inclined plate sedimentation tank to form a chemical mixing area, and the chemical mixing area is located in the front of the inclined plate device.
  • each medicament mixing area is provided with a corresponding dosing port above.
  • the bottom of the inclined plate sedimentation tank is provided with an excess sludge discharge port for discharging excess sludge in the system.
  • the present invention provides a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge.
  • the particle accumulation of aerobic sludge is carried out in a continuous flow mode.
  • the light sludge flocs are discharged from the system to promote the formation of aerobic granular sludge.
  • the use of the inclined plate device greatly shortens the separation time of the light sludge, and the inclined plate device has no transmission parts, so the process is simple and economical , energy saving, there is only one excess sludge generation point in the overall method, which is convenient for management and operation.
  • Fig. 1 is the process flow diagram of the method for promoting continuous flow aerobic granular sludge two-stage precipitation according to the present invention
  • FIG. 2 is a schematic structural diagram of an embodiment of a system for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to the present invention
  • FIG. 3 is a schematic structural diagram of another embodiment of the system for promoting two-stage sedimentation of continuous-flow aerobic granular sludge according to the present invention.
  • the embodiment of the present invention discloses a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge, as shown in FIG. 1 , the method includes the following steps:
  • the biochemical reaction tank, the granular sludge sedimentation tank and the inclined plate sedimentation tank are connected in sequence, and the inclined plate device is arranged in the inclined plate sedimentation tank;
  • step (3) The lighter flocculent sludge in the mud-water mixture in step (2) flows into the inclined plate sedimentation tank, and the sludge after accelerated separation by the inclined plate device is collected and discharged at the lower part of the inclined plate sedimentation tank.
  • the particle accumulation of aerobic sludge is realized in the continuous flow mode, and the heavier sludge is separated by the setting of the granular sludge sedimentation tank and the inclined plate sedimentation tank, and the light sludge flocs are discharged. , to promote the formation of aerobic granular sludge.
  • the separation time of light sludge is greatly shortened, the hydraulic load of the sedimentation area is increased, the floor space is reduced, and the separation effect is enhanced.
  • the inclined plate device has no transmission parts, and the technological process is simple, economical and energy-saving.
  • Another embodiment of the present invention discloses a method for promoting two-stage sedimentation of continuous flow aerobic granular sludge, comprising the following steps:
  • the biochemical reaction tank, the granular sludge sedimentation tank and the inclined plate sedimentation tank are connected in sequence, and the inclined plate device is arranged in the inclined plate sedimentation tank;
  • step (3) Make the lighter flocculent sludge in the mud-water mixed solution of step (2) flow into the inclined plate sedimentation tank, and the outside of the inclined plate sedimentation tank is provided with a chemical dosing device that is connected to the front end of the inclined plate sedimentation tank, and is added through the chemical addition The device adds coagulant to the front end of the inclined plate sedimentation tank, and the sludge after accelerated separation by the inclined plate device is collected and discharged at the lower part of the inclined plate sedimentation tank.
  • the embodiment of the present invention discloses a system for promoting two-stage sedimentation of continuous flow aerobic granular sludge.
  • the system includes a biochemical reaction tank 1, a granular sludge sedimentation tank 2 and inclined plate sedimentation arranged in sequence Pool 3, the biochemical reaction tank is provided with a system water inlet 4, the inclined plate sedimentation tank is provided with a system water outlet 5, the bottom of the granular sludge sedimentation tank is provided with a sludge return pipe 6 connected to the biochemical reaction tank, and the bottom of the inclined plate sedimentation tank is provided with a sludge return pipe 6.
  • the inclined plate device includes a plurality of inclined plates arranged in parallel, and the inclined direction of the inclined plates faces the water outlet direction of the inclined plate sedimentation tank, that is, toward the water outlet 5, and a clarification and separation zone 13 is formed between the plurality of inclined plates.
  • the inclined plate is made of polypropylene plate. It should be pointed out that the inclined plate is not limited to the selection of polypropylene plate, and other engineering plastic plates or stainless steel plates can be selected according to the process requirements.
  • the top of the inclined plate sedimentation tank is provided with a dosing port 8, and the outside of the inclined plate sedimentation tank is provided with a pharmaceutical dosing device 11 connected to the dosing port.
  • the working process of the system is as follows: sewage continuously flows into the biochemical reaction tank, and the mud-water mixture after the biochemical reaction enters the granular sludge sedimentation tank.
  • the heavier sludge in the liquid is rapidly precipitated into heavy sludge in the granular sludge sedimentation tank, and the heavy sludge is returned to the biochemical reaction tank;
  • the lighter flocculent sludge in the mud-water mixture flows into the inclined plate sedimentation tank, and is injected by the chemical agent.
  • the adding device adds coagulant to the upper part of the inclined plate sedimentation tank, and the sludge after accelerated separation by the inclined plate device is concentrated in the lower part of the inclined plate sedimentation tank and discharged into the biochemical system.
  • the inclined plate device includes a plurality of inclined pipes arranged in parallel, the inclined direction of the inclined pipes is oriented towards the water outlet direction of the inclined plate sedimentation tank, and a clarification and separation zone is formed between the plurality of inclined pipes.
  • the particle accumulation of aerobic sludge is realized in the continuous flow mode, and the heavier sludge is separated by the setting of the granular sludge sedimentation tank and the inclined plate sedimentation tank, and the light sludge flocs are discharged. , to promote the formation of aerobic granular sludge.
  • the separation time of light sludge is greatly shortened, the hydraulic load of the sedimentation area is increased, the floor space is reduced, and the separation effect is enhanced.
  • the inclined plate device has no transmission parts, and the technological process is simple, economical and energy-saving.

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Activated Sludge Processes (AREA)

Abstract

本发明提供一种促进连续流好氧颗粒污泥两级沉淀的方法及系统，该方法包括以下步骤：设置依次连接的生化反应池、颗粒污泥沉淀池和斜板沉淀池，在斜板沉淀池内设置斜板装置；使污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重污泥，将重污泥回流至生化反应池；使泥水混合液中较轻的絮状污泥流入斜板沉淀池，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部排放。本发明在连续流模式下进行好氧污泥的颗粒积聚化，通过颗粒污泥沉淀池和斜板沉淀池的设置，分离出较重污泥，将轻质污泥絮体排出，促进好氧颗粒污泥的形成，利用斜板装置大大缩短轻质污泥分离时间，并提高分离效率。

Description

一种促进连续流好氧颗粒污泥两级沉淀的方法及系统 技术领域
本发明涉及一种促进好氧颗粒污泥沉淀的方法及系统，特别涉及一种促进连续流好氧颗粒污泥两级沉淀的方法及系统，属于污水处理领域。
背景技术
好氧颗粒污泥技术是一种新型废水处理技术，具有良好的沉降性能、高污泥浓度，可更好承受高有机负荷、有毒有害物质、冲击负荷等，在污废水处理领域正得到更多的关注。好氧颗粒污泥的形成机理复杂，包含物理、化学和生物等相互作用，一般形成过程可看作是在一定的流体动力学、选择压等条件下，微生物自固定作用形成的生物体聚集现象。
目前的研究已经从间歇式活性污泥法(SBR)反应器中培养好氧颗粒污泥，转向连续进水模式下实现好氧颗粒污泥的形成。如《用于连续流好氧颗粒污泥的辐流式双区沉淀池》(申请号201610576528.2)、《一种AAO连续流好氧颗粒污泥脱氮除磷工艺及系统》(申请号201610708786.1)、《可调式两级沉淀池好氧颗粒污泥装置》(申请号201610596867.7)、《一种连续流好氧颗粒污泥培养与粒径控制方法及系统》(申请号201710075411.0)等的发明，均为新颖的解决方法。但两级沉淀形成好氧颗粒污泥的方法通过利用斜板浅层原理促进澄清及剩余污泥分离的过程并没有报道。
目前的研究显示，好氧颗粒污泥方法作为对目前广泛应用的活性污泥工艺的一种延伸改进工艺，具有良好并稳定的总氮去除效果，且可明显减少剩余污泥产生量，但除磷机制相对复杂，颗粒生长的优化条件与典型的 聚磷类微生物生长环境需求之间有一定矛盾，无法满足目前已经大幅提高的、特别是对总磷含量的出水要求，而在生物段用同步加化学混凝剂的方式会影响颗粒污泥形成条件及总氮处理效果。后续的借助化学混凝剂工艺处理措施，如高效沉淀、混凝过滤等，明显增加工程投资费用，并造成新的污泥类型及污泥产生点，增加下一步污泥处理工艺段的工作难度及费用。
发明内容
本发明的目的在于提供一种促进连续流好氧颗粒污泥两级沉淀的方法，以获得更高的最终固体悬浮物去除率，解决背景技术中所述的问题。
本发明的另一目的在于提供一种促进连续流好氧颗粒污泥两级沉淀的系统，获得更高的最终固体悬浮物去除率，实现更小的占地面积。
本发明解决其技术问题所采用的技术方案是：
一种促进连续流好氧颗粒污泥两级沉淀的方法，包括以下步骤：
(1)设置依次连接的生化反应池、颗粒污泥沉淀池和斜板沉淀池，在斜板沉淀池内设置斜板装置；
(2)使污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重污泥，将重污泥回流至生化反应池；
(3)使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部排放。
作为优选，所述步骤(1)中，所述斜板装置设于斜板沉淀池中部。
作为优选，所述步骤(1)中，所述斜板装置包括若干平行设置的斜板。
作为优选，所述斜板为工程塑料板或不锈钢板。
作为优选，所述斜板为聚丙烯板。
作为优选，所述步骤(1)中，所述斜板装置包括若干平行设置的斜管。
作为优选，所述步骤(2)中，所述颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管。
作为优选，所述步骤(3)中，所述斜板沉淀池外设有连通至斜板沉淀池前端的药剂投加装置，在使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池时，通过药剂投加装置向斜板沉淀池前端投加混凝剂。
一种促进连续流好氧颗粒污泥两级沉淀的系统，包括依次设置的生化反应池、颗粒污泥沉淀池和斜板沉淀池，所述颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管，所述斜板沉淀池内设有用于促进微小絮状悬浮物聚合成更大絮团的斜板装置。
作为优选，所述斜板装置包括若干平行设置的斜板，斜板倾斜方向朝向于斜板沉淀池出水方向，若干斜板之间形成澄清分离区。
作为优选，所述斜板装置包括若干平行设置的斜板，斜管倾斜方向朝向于斜板沉淀池出水方向，若干斜管之间形成澄清分离区。
作为优选，所述斜板为工程塑料板或不锈钢板。
作为优选，所述斜板为聚丙烯板。
作为优选，所述斜板沉淀池顶部设有加药口，斜板沉淀池外设有连通至加药口的药剂投加装置。
作为优选，所述斜板沉淀池内设有若干竖板，竖板设于加药口下方， 若干竖板与斜板沉淀池池壁合围形成药剂混合区，药剂混合区位于斜板装置前部。
作为优选，所述药剂混合区设有多个，每个药剂混合区上方设有一个对应的加药口。
作为优选，所述斜板沉淀池底部设有用于排出系统内剩余污泥的剩余污泥排放口。
本发明的有益效果是：
本发明的一种促进连续流好氧颗粒污泥两级沉淀的方法，在连续流模式下进行好氧污泥的颗粒积聚化，通过颗粒污泥沉淀池和斜板沉淀池的设置，分离出较重污泥，将轻质污泥絮体排出系统，促进好氧颗粒污泥的形成，利用斜板装置大大缩短轻质污泥分离时间，且斜板装置无传动部件，工艺流程简单、经济、节能，整体方法中只有一个剩余污泥产生点，便于管理操作。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1是本发明促进连续流好氧颗粒污泥两级沉淀的方法流程示意图；
图2是本发明促进连续流好氧颗粒污泥两级沉淀的系统的一种实施方式的结构示意图；
图3是本发明促进连续流好氧颗粒污泥两级沉淀的系统的另一种实施方式的结构示意图。
图中：1、生化反应池，2、颗粒污泥沉淀池，3、斜板沉淀池，4、系统进水口，5、系统出水口，6、污泥回流管，7、剩余污泥排放口，8、药剂投加口，9、药剂混合区，10、斜板装置，11、药剂投加装置，12、竖板，13、澄清分离区。
具体实施方式
下面通过具体实施例，并结合附图，对本发明的技术方案作进一步的具体说明。应当理解，本发明的实施并不局限于下面的实施例，对本发明所做的任何形式上的变通和/或改变都将落入本发明保护范围。
在本发明中，若非特指，所有的份、百分比均为重量单位，所采用的设备和原料等均可从市场购得或是本领域常用的。下述实施例中的方法，如无特别说明，均为本领域的常规方法。下述实施例中的部件或设备如无特别说明，均为通用标准件或本领域技术人员知晓的部件，其结构和原理都为本技术人员均可通过技术手册得知或通过常规实验方法获知。
本发明的实施例公开了一种促进连续流好氧颗粒污泥两级沉淀的方法，如图1所示，该方法包括以下步骤：
(1)设置依次连接的生化反应池、颗粒污泥沉淀池和斜板沉淀池，在斜板沉淀池内设置斜板装置；
(2)使污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重 污泥，将重污泥回流至生化反应池；
(3)使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部排放。
通过以上技术方案，实现在连续流模式下进行好氧污泥的颗粒积聚化，通过颗粒污泥沉淀池和斜板沉淀池的设置，分离出较重污泥，将轻质污泥絮体排出，促进好氧颗粒污泥的形成。利用斜板沉淀池设置的斜板装置，大大缩短轻质污泥分离时间，增加沉淀区水力负荷，减小占地面积，增强分离效果。斜板装置无传动部件，工艺流程简单、经济、节能。
本发明的另一实施例公开了一种促进连续流好氧颗粒污泥两级沉淀的方法，包括以下步骤：
(1)设置依次连接的生化反应池、颗粒污泥沉淀池和斜板沉淀池，在斜板沉淀池内设置斜板装置；
(2)使污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重污泥，将重污泥回流至生化反应池；
(3)使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池，斜板沉淀池外设有连通至斜板沉淀池前端的药剂投加装置，通过药剂投加装置向斜板沉淀池前端投加混凝剂，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部排放。
本发明的实施例公开了一种促进连续流好氧颗粒污泥两级沉淀的系统， 如图2所示，该系统包括依次设置的生化反应池1、颗粒污泥沉淀池2和斜板沉淀池3，在生化反应池上设有系统进水口4，斜板沉淀池上设有系统出水口5，颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管6，斜板沉淀池底部设有用于排出系统剩余污泥的剩余污泥排放口7，斜板沉淀池内设有用于促进微小絮状悬浮物聚合成更大絮团的斜板装置10。
斜板装置包括多个平行设置的斜板，斜板倾斜方向朝向于斜板沉淀池出水方向即朝向出水口5，多个斜板之间形成澄清分离区13。斜板选用聚丙烯板，需要指出的是，斜板不限于选用聚丙烯板，可根据工艺要求选用其它工程塑料板或不锈钢板。斜板沉淀池顶部设有加药口8，斜板沉淀池外设有连通至加药口的药剂投加装置11。斜板沉淀池内设有若干竖板12，竖板设于加药口下方，若干竖板与斜板沉淀池池壁合围形成药剂混合区9，药剂混合区位于斜板装置前部。
该系统的工作过程为：污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重污泥，将重污泥回流至生化反应池；泥水混合液中较轻的絮状污泥流入斜板沉淀池，通过药剂投加装置向斜板沉淀池上部投加混凝剂，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部浓缩排放出生化系统。
在另外的实施例中，如图3所示，斜板装置包括多个平行设置的斜管，斜管倾斜方向朝向于斜板沉淀池出水方向，多个斜管之间形成澄清分离区。药剂混合区设有多个，每个药剂混合区上方设有一个对应的加药口。
通过以上技术方案，实现在连续流模式下进行好氧污泥的颗粒积聚化，通过颗粒污泥沉淀池和斜板沉淀池的设置，分离出较重污泥，将轻质污泥絮体排出，促进好氧颗粒污泥的形成。利用斜板沉淀池设置的斜板装置，大大缩短轻质污泥分离时间，增加沉淀区水力负荷，减小占地面积，增强分离效果。斜板装置无传动部件，工艺流程简单、经济、节能。此外，由于剩余污泥在斜板沉淀池内单独沉淀排放，由于药物投加而产生的化学污泥也会随单独沉淀的剩余污泥一起直接排出系统，含有剩余化学药剂的污泥和污水不会回流至前置生物反应系统，也就不会对其有任何负面影响，整体方案中只有一个剩余污泥产生点，便于管理操作。
以上所述的实施例只是本发明的一种较佳的方案，并非对本发明作任何形式上的限制，在不超出权利要求所记载的技术方案的前提下还有其它的变体及改型。

Claims (10)

  1. 一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：该方法包括以下步骤：
    (1)设置依次连接的生化反应池、颗粒污泥沉淀池和斜板沉淀池，在斜板沉淀池内设置斜板装置；
    (2)使污水连续流入生化反应池，经生化反应后的泥水混合液进入颗粒污泥沉淀池，泥水混合液中较重的污泥在颗粒污泥沉淀池快速沉淀成重污泥，将重污泥回流至生化反应池；
    (3)使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池，经斜板装置加速分离后的污泥汇集在斜板沉淀池下部排放。
  2. 根据权利要求1所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述步骤(1)中，所述斜板装置设于斜板沉淀池中部。
  3. 根据权利要求1所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述步骤(1)中，所述斜板装置包括若干平行设置的斜板。
  4. 根据权利要求3所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述斜板为工程塑料板或不锈钢板。
  5. 根据权利要求3所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述斜板为聚丙烯板。
  6. 根据权利要求1所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述步骤(1)中，所述斜板装置包括若干平行设置的斜管。
  7. 根据权利要求1所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述步骤(2)中，所述颗粒污泥沉淀池底部设有连通至生化 反应池的污泥回流管。
  8. 根据权利要求1所述的一种促进连续流好氧颗粒污泥两级沉淀的方法，其特征在于：所述步骤(3)中，所述斜板沉淀池外设有连通至斜板沉淀池前端的药剂投加装置，在使步骤(2)的泥水混合液中较轻的絮状污泥流入斜板沉淀池时，通过药剂投加装置向斜板沉淀池前端投加混凝剂。
  9. 一种促进连续流好氧颗粒污泥两级沉淀的系统，其特征在于：该促进连续流好氧颗粒污泥两级沉淀的系统包括依次设置的生化反应池、颗粒污泥沉淀池和斜板沉淀池，所述颗粒污泥沉淀池底部设有连通至生化反应池的污泥回流管，所述斜板沉淀池内设有用于促进微小絮状悬浮物聚合成更大絮团的斜板装置。
  10. 根据权利要求9所述的一种促进连续流好氧颗粒污泥两级沉淀的系统，其特征在于：所述斜板装置包括若干平行设置的斜板或斜管，斜板或斜管的倾斜方向朝向于斜板沉淀池出水方向，若干斜板之间或者若干斜管之间形成澄清分离区；所述斜板沉淀池顶部设有加药口，斜板沉淀池外设有连通至加药口的药剂投加装置；所述斜板沉淀池内设有若干竖板，竖板设于加药口下方，若干竖板与斜板沉淀池池壁合围形成药剂混合区，药剂混合区位于斜板装置前部；所述药剂混合区设有多个，每个药剂混合区上方设有一个对应的加药口；所述斜板沉淀池底部设有用于排出系统内剩余污泥的剩余污泥排放口。
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