WO2022083801A2 - 一种处理农村生活污水固定填料多床式氧化沟 - Google Patents

一种处理农村生活污水固定填料多床式氧化沟 Download PDF

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Publication number
WO2022083801A2
WO2022083801A2 PCT/CN2022/071093 CN2022071093W WO2022083801A2 WO 2022083801 A2 WO2022083801 A2 WO 2022083801A2 CN 2022071093 W CN2022071093 W CN 2022071093W WO 2022083801 A2 WO2022083801 A2 WO 2022083801A2
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WIPO (PCT)
Prior art keywords
oxidation ditch
domestic sewage
rural domestic
bed
liftable
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PCT/CN2022/071093
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English (en)
French (fr)
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WO2022083801A3 (zh
Inventor
凌建军
Original Assignee
凌志环保股份有限公司
江苏凌志环保工程有限公司
凌志环保临泉有限公司
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Application filed by 凌志环保股份有限公司, 江苏凌志环保工程有限公司, 凌志环保临泉有限公司 filed Critical 凌志环保股份有限公司
Priority to ZA2022/01933A priority Critical patent/ZA202201933B/en
Publication of WO2022083801A2 publication Critical patent/WO2022083801A2/zh
Publication of WO2022083801A3 publication Critical patent/WO2022083801A3/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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1257—Oxidation ditches
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001—Runoff or storm water
    • 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
    • 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 the field of rural domestic sewage treatment, in particular to a buried oxidation ditch for treating rural domestic sewage.
  • the existing rural sewage treatment plans for nearly 3,000 counties and districts have been basically completed, and 70% of them have adopted underground centralized sewage treatment devices.
  • One sewage treatment station is set up in each village, generally 5-50 tons.
  • the entire national plan is about 2035. 3 trillion investment.
  • Each county has a population ranging from 500,000 to 2 million, and almost 200 to 1,000 sewage treatment stations are needed. If the ordinary activated sludge method is used, a lot of labor and maintenance costs are required.
  • the existing filler in the oxidation ditch shell is directly filled into the shell, and the flow-type filler is used.
  • the biofilm (bacteria film) on the surface of the filler is easily washed away, and the biological treatment function of the contact oxidation method is lost, and
  • the filler reaches its service life, it needs to be manually entered for fishing and replacement, which is difficult to maintain.
  • a large amount of ammonia gas and biogas will be generated after the biochemical reaction of rural sewage, which is likely to cause personnel accidents and needs to be improved.
  • the purpose of this invention is to provide a kind of fixed packing multi-bed type oxidation ditch for treating rural domestic sewage.
  • the innovation of the present invention is to provide a liftable type of rural domestic sewage which can adapt to the confluence of rain and sewage, resist the impact of rainwater, adapt to the daily impact load in rural areas, is safe and easy to maintain, and enhances the effect of removing organic matter and biological denitrification and phosphorus removal. Oxidation ditch.
  • the technical scheme of the present invention is: a multi-bed type oxidation ditch with fixed packing for treating rural domestic sewage, comprising an annular casing, the annular casing constitutes an oxidation ditch body, and the annular casing is provided with a water inlet pipe, It is characterized in that installation holes are spaced along the circumference of the annular casing, and a liftable placing bucket is inserted into the mounting hole, the liftable placing bucket is filled with filler and/or aeration device, and the surface of the liftable placing bucket is opened.
  • one of the installation holes is inserted with a water outlet tube, the water outlet tube is provided with a water inlet and a water outlet pipe, the aeration device is connected with the aeration pipe, and the aeration pipe is connected with the fan.
  • the liftable placing barrel is filled with spherical packing, inclined tube packing or bundle packing.
  • two inspection holes are provided at both ends of the annular casing, and a flow pusher or a jet aerator is placed in the inspection holes.
  • the annular housing is multi-segment rotational molding.
  • both the flow propeller or the jet aerator are liftable.
  • the liftable device is generally a guide rail or a guide rod.
  • the barrel is placed with a circular or polygonal cross-section.
  • the placing bucket in the oxidation ditch can be disassembled and installed as a whole, which not only saves the amount of on-site installation work, but also is safe and convenient for later maintenance.
  • the annular groove is made into small sections by rotomolding process and assembled, which is convenient for standardized manufacturing and changing the processing capacity according to actual needs.
  • the filler is fixed in the placing bucket, the rainwater can only wash the surface layer of the filler, and the biofilm on the surface of the inner layer of the filler is still well preserved, effectively realizing the biological treatment of the contact oxidation method.
  • the present invention solves the pain points of the existing rural domestic sewage treatment.
  • the oxidation ditch process is adopted, which is suitable for the confluence of rain and sewage, resists the impact of rainwater, adapts to the daily impact load in rural areas, and can remove phosphorus and nitrogen;
  • the fixed packing method is used to realize the contact oxidation method, without the use of active sludge;
  • FIG. 1 is a plan view of Example 1.
  • FIG. 1 is a plan view of Example 1.
  • FIG. 2 is a front view of Embodiment 1.
  • FIG. 2 is a front view of Embodiment 1.
  • FIG. 3 is a cross-sectional view of the water outlet of Example 1.
  • FIG. 4 is a cross-sectional view of the placing bucket.
  • FIG. 5 is a plan view of Example 2.
  • FIG. 6 is a front view of Embodiment 2.
  • FIG. 6 is a front view of Embodiment 2.
  • FIG. 7 is a cross-sectional view of the water outlet cylinder of Embodiment 2.
  • Example 1 As shown in Figures 1-4, a multi-bed type oxidation ditch with fixed packing for treating rural domestic sewage, comprising an annular casing 1, the annular casing 1 is multi-segment rotational molding, and the annular casing 1 constitutes an oxidation ditch Body 2, the annular casing 1 is provided with a water inlet pipe 1.1, and installation holes 1.2 are spaced along the circumference of the annular casing 1. The installation hole 1.2 is inserted with a liftable placing bucket 3, and the middle part of the liftable placing bucket 3 is inserted.
  • an aeration device 5 is installed at the bottom, and the surface of the liftable placing bucket 3 is evenly distributed with water passage holes 3.1, one of which is inserted into a mounting hole 1.2 with a water outlet tube 6, and the water outlet tube 6 is opened at the bottom end
  • the aeration device 5 in each liftable placing bucket 3 is connected to the aeration pipe 5.1, and the aeration pipe 5.1 is connected.
  • Two inspection holes 1.3 are opened at both ends of the annular casing 1, and a liftable flow pusher 10 is placed in the inspection holes 1.3.
  • the aeration device 5 is a tubular aerator.
  • the sewage After the sewage enters the oxidation ditch, it circulates in the ditch under the action of the pusher. When the sewage flows through the ditch that can be placed in a liftable bucket, under aeration conditions, biological contact oxidation is achieved.
  • the sewage after aerobic treatment enters the anaerobic and anoxic environment in the ditch through the opening of the cylinder wall, and part of the sewage enters the cylinder set downstream in the ditch for aerobic treatment. Finally, the sewage that has undergone multiple anaerobic and aerobic treatments enters the vertical cylinder at the water outlet, and under the action of the inclined pipe packing, accelerates the precipitation and then discharges the water.
  • the cylinder in the annular oxidation ditch can be disassembled and installed as a whole, which not only saves the amount of on-site installation work, but also facilitates later maintenance.
  • the annular oxidation ditch is assembled into small sections by rotomolding process, which is convenient for standardized manufacturing and changing the processing capacity according to actual needs.
  • the directional control stirring device in the annular oxidation ditch transmits the horizontal speed to the mixed liquid, so that the stirred mixed liquid circulates in the closed channel, which has special hydraulic flow and unique advantages, and makes full use of the water in the oxidation ditch Mechanical properties, sufficient mixing and stirring, preventing sludge sedimentation, fully mixing sludge and sewage, and thoroughly carbonizing and nitrifying reactions.
  • the aerobic treatment conditions of biological contact oxidation are created in the cylinder through the packing and aeration device, and the sewage can enter the anoxic and anaerobic treatment conditions in the annular groove through the opening of the cylinder wall, thereby forming an obvious dissolved oxygen concentration gradient.
  • the process has the characteristics of biological contact oxidation and multi-stage AO process, which is conducive to strengthening the removal of organic matter and biological denitrification and phosphorus removal.
  • Example 2 As shown in Figures 4-7, a multi-bed type oxidation ditch with fixed packing for treating rural domestic sewage, comprising an annular casing 1, the annular casing 1 is multi-segment rotational molding, and the annular casing 1 constitutes an oxidation ditch Body 2, the annular casing 1 is provided with a water inlet pipe 1.1, and installation holes 1.2 are spaced along the circumference of the annular casing 1. The installation hole 1.2 is inserted with a liftable placing bucket 3, and the middle part of the liftable placing bucket 3 is inserted.
  • the surface of the liftable placing bucket 3 is evenly distributed with water holes 3.1, one of the installation holes 1.2 is inserted with a water outlet 6, and the water outlet 6 is provided with a water inlet 6.1 near the bottom end, and a water inlet 6.1 is provided near the top.
  • the sewage After the sewage enters the annular ditch, under the action of the jet aerator, it circulates in the ditch after being oxygenated.
  • the sewage flows through the ditch that can be placed in a liftable manner, it enters the cylinder loaded with the biological filler through the hole in the cylinder wall, and the biological treatment is strengthened under the action of the filler biofilm.
  • the sewage After the sewage is treated aerobic in the jet aeration area, it gradually enters the anoxic and anaerobic treatment along the length of the ditch, and then enters the aerobic treatment section under the action of the jet aerator at the other end.
  • the sewage that has undergone multiple anaerobic and aerobic treatments enters the water outlet at the water outlet, and under the action of the inclined pipe packing, accelerates the precipitation and then discharges the water.
  • the vertical cylinder in the annular groove can be disassembled and installed as a whole, which not only saves the amount of on-site installation work, but also facilitates later maintenance.
  • the annular groove is made into small sections by rotomolding process and assembled, which is convenient for standardized manufacturing and changing the processing capacity according to actual needs.
  • the jet aeration device in the annular ditch can oxygenate the mixture and transfer kinetic energy, so that the stirred mixture circulates in the closed channel. It has special hydraulic flow and unique advantages, and makes full use of the water in the oxidation ditch Mechanical properties, sufficient mixing and stirring, prevent sludge from settling, make sludge and sewage fully mixed, and at the same time, the jet aerator integrates the functions of push flow and aeration, which saves the amount of installation engineering.
  • the combination of the biofilm process and the activated sludge process is realized under the aerobic, anoxic and anaerobic treatment conditions of the annular groove, which is conducive to strengthening the removal of organic matter and biological denitrification and phosphorus removal.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

本发明公开了一种处理农村生活污水固定填料多床式氧化沟，包括环形壳体，环形壳体构成氧化沟沟体，环形壳体上设有进水管，沿环形壳体周长间隔开设有安装孔，安装孔内插设有可提升式放置桶，可提升式放置桶内填充有填料和/或曝气装置，可提升式放置桶表面开设有若干过水孔，其中一安装孔内插设有一出水筒，出水筒上开设有进水管、出水管，曝气装置连通曝气管道，曝气管道连接风机。安全、维修方便，强化了有机物去除及生物脱氮及除磷效率。

Description

一种处理农村生活污水固定填料多床式氧化沟 技术领域
本发明涉及农村生活污水处理领域，尤其涉及处理农村生活污水用地埋式氧化沟。
 背景技术
现有农村污水的处理规划近3000个县、区已基本编制完毕，70%采用了地下式集中污水处理装置，一个村设置一个污水处理站，一般5-50吨，整个国家规划在2035年约投资3万亿。
现阶段，农村生活污水主要处理难度在于全天的流量不稳定，在早中晚不到约4小时，排放了20小时水量，污水排放量占用水量的比例达到50%-80%，对设备的抗冲击能力要求较高，并且需要调节池和泵站，土建设成本和设备成本高。
日本、韩国多采用低负荷生物处理法，一般停留时间为3-7天以上。
中国由于没有成熟的农村污水设计规范，参照了城镇污水设计规范，仍然采用的以活性污泥法为代表的高负荷生物处理法，一般停留时间不超过8-16小时，而一个自然村，农村污水处理量大约5-50吨之间，规模较小并且由于农村住户分散广阔有的在丘陵山区地带导致无法实施雨污分流，下雨时冲击负荷较大，活性污泥法的菌种会大量流失，小型农村污水利用活性污泥法无法正常运转，排放超标，比原位生态法处理的效果更差，这是目前中国在农村污水活性污泥法处理之后仍然无法改善河道的根本原因之一。
每个县大约50万-200万不等的人口，几乎需要200-1000座污水处理站，如果利用普通的活性污泥法，需要大量的人工维护成本。
 技术问题
并且现有的氧化沟壳体内填料是直接填充入壳体内的，采用流动式填料，当雨水冲击时容易将填料表面的生物膜（菌膜）冲刷掉，失去接触氧化法的生物处理功能，并且当填料达到使用寿命后需要人工进入进行捞取更换，检修困难，同时农村污水生化反应后会产生大量的氨气和沼气，容易造成人员事故，有待改进。
 技术解决方案
本发明的目的是提供一种处理农村生活污水固定填料多床式氧化沟。
本发明的创新点在于提供了一种适应雨污合流，抗雨水冲击，适应农村朝夕性冲击负荷，安全、维修方便，强化了有机物去除及生物脱氮及除磷效果的农村生活污水可提升式氧化沟。
为实现上述发明目的，本发明的技术方案是：一种处理农村生活污水固定填料多床式氧化沟，包括环形壳体，环形壳体构成氧化沟沟体，环形壳体上设有进水管，其特征在于沿环形壳体周长间隔开设有安装孔，安装孔内插设有可提升式放置桶，可提升式放置桶内填充有填料和/或曝气装置，可提升式放置桶表面开设有若干过水孔，其中一安装孔内插设有一出水筒，出水筒上开设有进水口、出水管，曝气装置连通曝气管道，曝气管道连接风机。
作为优选，可提升式放置桶内填充有球状填料或斜管填料或束状填料。
作为优选，环形壳体两端开设有两个检修孔，检修孔内放置有推流器或射流曝气器。
作为优选，环形壳体为多段滚塑成型。
作为优选，推流器或射流曝气器均为可提升式。可提升装置一般为导轨或导杆。
作为优选，放置桶为截面为圆形或多边形。
 有益效果
1、氧化沟内的放置桶可整体拆卸与安装，既节省了现场安装工程量，安全、又方便后期维护。
2、环形沟采用滚塑工艺制成小段后组装而成，便于标准化制造及根据实际需求改变处理能力。
3、填料在放置桶内固定，雨水仅能冲刷到表层填料，里层填料表面的生物膜依旧保存完好，有效实现接触氧化法的生物处理。
4、本发明解决了现有的农村生活污水处理的痛点，第一、采用氧化沟工艺，适应雨污合流，抗雨水冲击，适应了农村朝夕性冲击负荷，并且可以除磷脱氮；第二、采用固定填料法，实现了接触氧化法，无需采用活动污泥；第三、采用可提升装置，无需进入内部检修，防止人员安全事故发生，利用三点组合实现了固定式+接触氧化+氧化沟+低负荷法。
5、强化了有机物去除及生物脱氮及除磷效果。
 附图说明
图1为实施例1的俯视图。
图2为实施例1的正视图。
图3为实施例1的出水筒剖视图。
图4为放置桶的剖视图。
图5为实施例2的俯视图。
图6为实施例2的正视图。
图7为实施例2的出水筒剖视图。
 本发明的实施方式
下面将结合附图对本发明实施例中的技术方案进行清楚、完整地描述。
实施例1：如图1-4所示，一种处理农村生活污水固定填料多床式氧化沟，包括环形壳体1，环形壳体1为多段滚塑成型，环形壳体1构成氧化沟沟体2，环形壳体1上设有进水管1.1，沿环形壳体1周长间隔开设有安装孔1.2，安装孔1.2内插设有可提升式放置桶3，可提升式放置桶3内中部填充有球状填料4，底部安装有曝气装置5，可提升式放置桶3表面均布有过水孔3.1，其中一安装孔1.2内插设有一出水筒6，出水筒6上近底端开设有进水口6.1，近顶端设置有出水管7，出水筒6内设置有斜管填料8，每个可提升式放置桶3内的曝气装置5均连通曝气管道5.1，曝气管道5.1连接环形壳体中部可利用空间内的若干个小型风机9。环形壳体1两端开设有两个检修孔1.3，检修孔1.3内放置有可提升式推流器10。曝气装置5为管式曝气器。
工艺描述：
污水进入氧化沟后，在推流器作用下，在沟内循环流动。污水流经沟内可提升式放置桶时，在曝气条件下，实现生物接触氧化。经好氧处理后的污水又经筒壁开孔进入沟内厌氧缺氧环境，部分污水又进入沟内下游设置的筒体内进行好氧处理。最后经多次厌缺氧及好氧处理的污水进入出水处的立筒内，在斜管填料作用下，加速沉淀后出水。
工艺优点：
1、环形氧化沟内的筒体可整体拆卸与安装，既节省了现场安装工程量，又方便后期维护。
2、环形氧化沟采用滚塑工艺制成小段后组装而成，便于标准化制造及根据实际需求改变处理能力。
3、环形氧化沟内定向控制的搅拌装置，向混合液传递水平速度，从而使被搅动的混合液在封闭渠道内循环流动，具有特殊的水力学流态和独特的优点，充分利用氧化沟水力学特性，混合搅拌充分，防止污泥沉降，使污泥与污水充分混合，彻底进行碳化、硝化反应。
4、通过填料及曝气装置在筒体内营造生物接触氧化的好氧处理条件，又通过筒壁开孔使得污水能进入环形沟内缺氧厌氧的处理条件，从而形成明显的溶解氧浓度梯度，同时也让该工艺具有了生物接触氧化及多级AO工艺的特点，有利于强化有机物去除及生物脱氮及除磷。
实施例2：如图4-7所示，一种处理农村生活污水固定填料多床式氧化沟，包括环形壳体1，环形壳体1为多段滚塑成型，环形壳体1构成氧化沟沟体2，环形壳体1上设有进水管1.1，沿环形壳体1周长间隔开设有安装孔1.2，安装孔1.2内插设有可提升式放置桶3，可提升式放置桶3内中部填充有球状填料4，可提升式放置桶3表面均布有过水孔3.1，其中一安装孔1.2内插设有一出水筒6，出水筒6上近底端开设有进水口6.1，近顶端设置有出水管7，出水筒6内设置有斜管填料8，环形壳体1两端开设有两个检修孔1.3，检修孔1.3内放置有可提升式射流曝气器10。
工艺描述：
污水进入环形沟后，在射流曝气器作用下，充氧后在沟内循环流动。污水流经沟内可提升式放置桶时，通过筒壁开孔进入装载有生物填料的筒体内，在填料生物膜的作用下强化生物处理。污水在射流曝气区域进行好氧处理后，沿沟长逐步进入缺氧及厌氧处理后，在另一端射流曝气器作用下又进入好氧处理段。最后经多次厌缺氧及好氧处理的污水进入出水处的出水筒内，在斜管填料作用下，加速沉淀后出水。
工艺优点：
    1、环形沟内的立筒可整体拆卸与安装，既节省了现场安装工程量，又方便后期维护。
2、环形沟采用滚塑工艺制成小段后组装而成，便于标准化制造及根据实际需求改变处理能力。
3、环形沟内射流曝气装置，向混合液充氧及传递动能，从而使被搅动的混合液在封闭渠道内循环流动，具有特殊的水力学流态和独特的优点，充分利用氧化沟水力学特性，混合搅拌充分，防止污泥沉降，使污泥与污水充分混合，同时射流曝气器集推流及曝气功能于一体，节约了安装工程量。
4、通过立筒内的生物填料，在环形沟好氧缺氧厌氧处理条件下内都实现了生物膜工艺与活性污泥工艺的结合，有利于强化有机物去除及生物脱氮及除磷。
所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。

Claims (7)

  1. 一种处理农村生活污水固定填料多床式氧化沟，包括环形壳体，环形壳体构成氧化沟沟体，环形壳体上设有进水管，其特征在于沿环形壳体周长间隔开设有安装孔，安装孔内插设有可提升式放置桶，可提升式放置桶内填充有填料和/或曝气装置，可提升式放置桶表面开设有至少一个过水孔，其中一安装孔内插设有一出水筒，出水筒上开设有进水口、出水管，曝气装置连通曝气管道，曝气管道连接风机。
  2. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于可提升式放置桶内填充有球状填料或束状填料。
  3. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于出水筒内设置有斜管填料。
  4. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于环形壳体两端开设有两个检修孔，检修孔内放置有推流器或射流曝气器。
  5. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于环形壳体为多段滚塑成型或挤塑成型或吹塑成型或注塑成型或玻璃钢模压成型。
  6. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于推流器或射流曝气器均为可提升式。
  7. 根据权利要求1所述的一种处理农村生活污水固定填料多床式氧化沟，其特征在于放置桶为截面为圆形或多边形。
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