JP5328749B2 - Apparatus and method for treating rain runoff using non-powered backwash system - Google Patents
Apparatus and method for treating rain runoff using non-powered backwash system Download PDFInfo
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- JP5328749B2 JP5328749B2 JP2010250628A JP2010250628A JP5328749B2 JP 5328749 B2 JP5328749 B2 JP 5328749B2 JP 2010250628 A JP2010250628 A JP 2010250628A JP 2010250628 A JP2010250628 A JP 2010250628A JP 5328749 B2 JP5328749 B2 JP 5328749B2
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001914 filtration Methods 0.000 claims abstract description 180
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000011001 backwashing Methods 0.000 claims abstract description 21
- 238000004821 distillation Methods 0.000 claims description 50
- 230000005484 gravity Effects 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005339 levitation Methods 0.000 claims 1
- 239000010451 perlite Substances 0.000 claims 1
- 235000019362 perlite Nutrition 0.000 claims 1
- 239000003344 environmental pollutant Substances 0.000 abstract description 8
- 231100000719 pollutant Toxicity 0.000 abstract description 8
- 230000000630 rising effect Effects 0.000 abstract description 4
- 239000007787 solid Substances 0.000 description 13
- 239000000356 contaminant Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001562 pearlite Inorganic materials 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
- B01D24/12—Downward filtration, the filtering material being supported by pervious surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/05—Floating filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2068—Other inorganic materials, e.g. ceramics
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2201/00—Details relating to filtering apparatus
- B01D2201/64—Filters having floating elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/12—Separation devices for treating rain or storm water
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Filtration Of Liquid (AREA)
Abstract
Description
本発明は、無動力逆洗方式を利用した降雨流出水の処理装置及びその方法に係り、より詳しくは、非点源汚染物質を物理的濾過にて効率よく除去すると共に別途の動力供給なしに濾材を逆洗できるようにすることで運転寿命を極大化することができる無動力逆洗方式を利用した降雨流出水の処理装置及びその方法に関する。 The present invention relates to a rain effluent treatment apparatus and method using a non-powered backwashing system, and more specifically, non-point source pollutants can be efficiently removed by physical filtration and without separate power supply. The present invention relates to an apparatus and a method for treating rain effluent using a non-powered backwash system that can maximize the operating life by allowing the filter medium to be backwashed.
一般に、非点源汚染物質は人間の活動による様々な土地利用に起因しており、主に降雨時の雨水で洗い流されて降雨流出水の形態で水系に排出される。非点源汚染物質は排出地域が不明で広範な地表面上に残存していて、雨水とともに河川などの公共水域や地下水に流入されて水質汚染を引き起こす主要原因となっている。 In general, non-point source pollutants are attributed to various land uses by human activities, and are mainly washed away with rain water during rain and discharged into the water system in the form of rainfall runoff. Non-point source pollutants remain undiscovered on a wide range of ground surfaces, and are the main cause of water pollution by flowing into rainwater and other public waters such as rivers and groundwater.
非点源汚染物質の弊害を克服するために様々な非点源汚染物質の処理方法が提示されたことがあり、その代表的なものとしては、特許文献１に示す初期降雨流出水の処理装置及びこれを利用した初期降雨流出水の処理方法のような装置型処理施設と、特許文献２に示す土壌及び植生を利用した降雨流出水の処理装置のような自然型処理施設がある。この種の施設では、濾材での物理的濾過にて非点源汚染物質中に存在する固形汚染物を除去することで有機物、栄養塩類、重金属などの排出濃度を低減することを主目的とする。 In order to overcome the harmful effects of non-point source pollutants, various non-point source pollutant treatment methods have been presented, and a representative example thereof is a device for treating initial rainfall effluent shown in Patent Document 1. In addition, there are apparatus-type treatment facilities such as a method for treating initial rainfall effluent using the same, and natural-type treatment facilities such as a treatment apparatus for rainfall effluent using soil and vegetation described in Patent Document 2. The main purpose of this type of facility is to reduce discharge concentrations of organic substances, nutrients, heavy metals, etc. by removing solid contaminants present in non-point source pollutants through physical filtration with filter media. .
しかしながら、水系近隣に散発的に設置される非点源汚染処理施設の位置特性及び経済性などの理由から上記施設に電力を供給することは困難であるのが実情であり、このため、長期運転による濾材の目詰まり現象（ｃｌｏｇｇｉｎｇ）が生じると、逆洗などの人為的方法による性能回復が困難であり、施設の一部または施設全体を取り替えなければならないという限界点を持っている。 However, in reality, it is difficult to supply power to the above facilities due to the location characteristics and economic efficiency of non-point source pollution treatment facilities installed sporadically in the vicinity of the water system. If the clogging of the filter medium due to the occurrence of clogging occurs, it is difficult to recover the performance by an artificial method such as backwashing, and there is a limit in that part of the facility or the entire facility must be replaced.
本発明は、上記のような問題を解決するためになされたものであって、非点源汚染物質を物理的濾過にて効率よく除去すると共に別途の動力供給なしに濾材を逆洗できるようにすることで運転寿命を極大化することができる無動力逆洗方式を利用した降雨流出水の処理装置及びその方法を提供することをその目的とする。 The present invention has been made to solve the above-described problems, and is capable of efficiently removing non-point source pollutants by physical filtration and backwashing the filter medium without separate power supply. It is an object of the present invention to provide a rain effluent treatment apparatus and method using a non-powered backwash system capable of maximizing the operation life.
上記目的を達成するための本発明による無動力逆洗方式を利用した降雨流出水の処理装置は、降雨流出水を貯留する貯留槽、及び上記貯留槽内に具備されて降雨流出水を濾過する濾過槽を含み、上記濾過槽は、上記貯留槽から流入される降雨流出水を上向流として濾過する第１の濾過槽と、上記第１の濾過槽を通過した降雨流出水を下向流として濾過する第２の濾過槽とを具備し、上記第１の濾過槽内に上記第１の濾過槽の全高に対して一部の高さまで充填される第１の濾材層が具備され、上記第１の濾材層は第１の濾過槽内の水位の上昇または下降に伴って上昇または下降し、上記第１の濾過槽の一方側に上記貯留槽と上記第１の濾過槽とを空間的に連結させる逆洗空気注入口が具備され、上記貯留槽の水位に応じて選択的に上記貯留槽の空気が上記逆洗空気注入口から上記第１の濾過槽の内部に供給されることを特徴とする。 Runoff water treatment apparatus using a non-powered backwash system according to the present invention for achieving the above object, savings distillate tank for savings distillation rainfall runoff, and is provided in the savings distillation tank Runoff water It includes a filtration tank for filtering, the filtration tank, a first and a filtration tank for filtering the runoff water to be flowed from the savings distillation vessel as the upflow, runoff water which has passed through the first filtering tank A first filtration medium layer that is filled to a certain height with respect to the total height of the first filtration tank in the first filtration tank. are provided, the first filter medium layer raised or lowered with the raising or lowering of the water level within the first filtration tank, the first one the savings distillation tank side and the first filter of the filtration tank backwashing air inlet is provided for spatially connecting the tank, selectively above savings distillation tank in accordance with the water level of the savings distillation vessel Air is characterized in that it is supplied into the first filtration tank from above backwashing air inlet.
上記第１の濾過槽と第２の濾過槽とは隔壁を挟んで仕切られ、上記第１の濾過槽及び第２の濾過槽の上部には濾過流路が更に具備され、上記第１の濾過槽を上向流として通過した降雨流出水は、上記濾過流路に沿って流れていき、上記第２の濾過槽へ下向流として供給される。 The first filtration tank and the second filtration tank are partitioned with a partition wall therebetween, and a filtration channel is further provided above the first filtration tank and the second filtration tank, and the first filtration tank is provided. Rainfall effluent that has passed through the tank as an upward flow flows along the filtration flow path and is supplied as a downward flow to the second filtration tank.
上記第１の濾過槽及び第２の濾過槽の上部及び下部に、それぞれ上部有孔板、下部有孔板が具備され、上記上部有孔板上に濾過流路が具備されていてよい。また、上記貯留槽の底面は傾斜板形態で構成され、上記傾斜板と濾過槽の底面との間の空間から降雨流出水が上記第１の濾過槽の内部に上向流として流入される。 An upper perforated plate and a lower perforated plate may be provided on the upper and lower portions of the first filtration tank and the second filtration tank, respectively, and a filtration channel may be provided on the upper perforated plate. Further, the bottom surface of the savings distillation tank is constituted by inclined plate form, runoff water is introduced as a upward flow inside said first filtration tank from the space between the bottom of the filtration tank and the inclined plate .
上記第１の濾材層は、水よりも比重が低い物質よりなる浮上濾材から構成されていてよく、上記第１の濾材層は、パーライト(perlite)または水よりも比重が低い合成樹脂濾材から構成されていてよい。また、上記第２の濾材層は、水よりも比重が高い物質から構成され、上記第２の濾材層は、ゼオライト(zeolite)、活性炭、スラグ(slag)のいずれかから構成されていてよい。 The first filter medium layer may be made of a floating filter medium made of a substance having a specific gravity lower than that of water, and the first filter medium layer is made of pearlite or a synthetic resin filter medium having a specific gravity lower than that of water. May have been. The second filter medium layer may be made of a substance having a specific gravity higher than that of water, and the second filter medium layer may be made of any one of zeolite, activated carbon, and slag.
上記濾過槽の上端に濾過槽内の空気を排出させる逆止弁が具備されていてよい。また、上記第２の濾過槽内に第２の濾材層が具備され、上記第２の濾過槽内に流入水分配管が更に具備され、上記流入水分配管の一端は上記濾過流路に連結され、他端は上記濾過槽の上部から所定の距離離間した第２の濾材層内に位置すればよい。 A check valve for discharging the air in the filtration tank may be provided at the upper end of the filtration tank. In addition, a second filter medium layer is provided in the second filtration tank, an inflow moisture pipe is further provided in the second filtration tank, and one end of the inflow moisture pipe is connected to the filtration flow path, The other end may be located in the second filter medium layer that is separated from the upper part of the filtration tank by a predetermined distance.
上記第１の濾材層は、上記第１の濾過槽の全高に対して１／２〜２／３の高さまで充填されることが好ましく、上記第２の濾過槽の一方側には濾過処理された処理水が最終排出される流出管が更に具備されていてよい。 The first filter medium layer is preferably filled to a height of 1/2 to 2/3 of the total height of the first filtration tank, and is filtered on one side of the second filtration tank. An outflow pipe from which the treated water is finally discharged may further be provided.
本発明による無動力逆洗方式を利用した降雨流出水の処理方法は、貯留槽内に降雨流出水を貯留するステップと、上記貯留槽内に配置された第１の濾過槽に上記貯留槽内の降雨流出水を上向流として上記第１の濾過槽に供給されるステップと、上記第１の濾過槽の水位の上昇に伴って上記第１の濾過槽の第１の濾材層が上昇し、上記第１の濾材層の上昇が止まった状態で第１の濾材層による濾過を進めるステップと、上記第１の濾過槽と隔壁を挟んで仕切られる第２の濾過槽に上記第１の濾過槽を通過した降雨流出水を下向流として供給し、上記第２の濾過槽の第２の濾材層による濾過を進めるステップ、及び上記貯留槽の水位の下降時に上記第１の濾過槽の一方側に形成される逆洗空気注入口から上記第１の濾過槽内に空気を注入して上記第１の濾材層の逆洗を進めるステップと、を含む。 Processing method of runoff water using a non-powered backwash system according to the present invention includes the steps of savings distillation rainfall runoff water savings distillation tank, above the first filtering tank disposed in the savings distillation vessel a step which is supplied to the first filtering tank runoff water savings distillation vessel as the upflow, the first filter medium of the first filtering tank with a rise in the water level of the first filtering tank A step of advancing filtration by the first filter medium layer in a state where the layer rises and the rise of the first filter medium layer stops, and the second filter tank partitioned by sandwiching the first filter tank and the partition wall the runoff water which has passed through the first filtering tank supplied as downward flow, the second second advancing the filtration through the filter layer of the filtration tank, and the first during lowering of the water level of the savings distillation vessel Air is injected into the first filtration tank from a backwash air inlet formed on one side of the filtration tank. Comprising the steps of advancing the backwash of the first filter medium layer.
本発明による無動力逆洗方式を利用した降雨流出水の処理装置及びその方法では、次のような効果が得られる。 In the apparatus and method for treating rain effluent using the non-powered backwash system according to the present invention, the following effects can be obtained.
上向流の第１の濾材層と下向流の第２の濾材層の水理構造を利用して降雨終了時に無動力逆洗で第１の濾材層を洗浄すると共に、第２の濾過層に具備された流入水分配管を利用して第２の濾材層の表面目詰まりを遅延させることで装置の運転寿命を最大化することができる。 Using the hydraulic structure of the first filter medium layer in the upward flow and the second filter medium layer in the downward flow, the first filter medium layer is washed by powerless backwashing at the end of the rain, and the second filter layer The operation life of the apparatus can be maximized by delaying the surface clogging of the second filter medium layer using the inflow moisture pipe provided in the apparatus.
また、貯留槽と濾過槽を一つの空間内に具備させて敷地所要を最小化し、濾過槽の水位を一定に保持させることで降雨流出水の発生量の変動にかかわらず固形物、栄養塩類、重金属、炭化水素などを効率よく除去し、河川などの公共水域の汚染を最小化することができる。 Also, to minimize on-site required by comprising a a savings distillation tank filtration tank into one space, the solids despite variations in the amount of generated runoff water in that is kept constant the water level of the filtering tank, nutrients It can efficiently remove heavy metals, hydrocarbons, etc. and minimize pollution of public water areas such as rivers.
以下、図面を参照して本発明の一実施形態による無動力逆洗方式を利用した降雨流出水の処理装置及びその方法を詳細に説明する。 Hereinafter, an apparatus and a method for treating rain effluent using a non-powered backwash system according to an embodiment of the present invention will be described in detail with reference to the drawings.
図１及び図２に示すように、本発明の一実施形態による無動力逆洗方式を利用した降雨流出水の処理装置は、大きく貯留槽１００と濾過槽２００とを含む。 As shown in FIGS. 1 and 2, the processing apparatus of runoff water using a non-powered backwash system according to an embodiment of the present invention, includes a large savings distillate tank 100 and the filtration tank 200.
上記貯留槽１００は、降雨流出水が貯留される空間及び上記濾過槽２００が設置される空間を提供する。ここで、上記濾過槽２００は、貯留槽１００の体積よりも小さく、このため、上記貯留槽１００内における濾過槽２００が具備される空間以外の空間は降雨流出水が貯留される空間になる。 The savings distillation tank 100 provides a space in which space and the filtration tank 200 Runoff water is savings distillation is installed. Here, the filtration tank 200 is smaller than the volume of savings distillation vessel 100, and therefore, space space other than the space filter tank 200 in the savings distillation tank 100 is provided in the runoff water is savings distillation become.
上記貯留槽１００の一方側には降雨流出水が流入される降雨流入管１０１が具備され、流入された降雨流出水は、上記濾過槽２００の下部から濾過槽２００の内部に流入される。このために、図２に示すように貯留槽１００の底面は傾斜板形態で構成されていてよく、上記傾斜板と濾過槽２００の底面との間の空間から降雨流出水が上記濾過槽２００の内部に上向流として流入される。 On one side of the savings distillation tank 100 is provided rainfall inflow pipe 101 that runoff water is introduced, inflowing runoff water is introduced into the filtration tank 200 from the lower portion of the filtration tank 200. To this may be the bottom surface of savings distillation tank 100 as shown in FIG. 2 is composed of inclined plate form, the filtration tank 200 runoff water from the space between the bottom of the filtration tank 200 and the inclined plate It flows into the interior as an upward flow.
このように貯留槽１００の底面が傾斜板で構成され、貯留槽１００内の降雨流出水が上向流の形態で上記濾過槽２００の内部に流入されることによって、降雨流出水中に含まれている粗大固形物や夾雑物などは重力によって傾斜板に沿って下降し、下降する粗大固形物や夾雑物は、上記貯留槽１００の下部の一方側に具備された固形物貯蔵部１１０に貯蔵される。 Thus the bottom surface of the savings distillation vessel 100 is constituted by the inclined plate, by being introduced into the filter tank 200 in the form of rain runoff savings distillation vessel 100 upward flow, included in the runoff water descends along etc. by gravity coarse solids and contaminants are the inclined plate is coarse solids and contaminants to be descending, the solids reservoir 110 provided on one side of the lower portion of the savings distillation vessel 100 Stored in.
一方、上記濾過槽２００は、隔壁２０１を挟んで第１の濾過槽２１０と第２の濾過槽２２０とに仕切られる。また、上記第１の濾過槽２１０と第２の濾過槽２２０の上部には濾過流路２３０が具備され、上記第１の濾過槽２１０を経た降雨流出水は上記濾過流路２３０を通って上記第２の濾過槽２２０に供給される。なお、上記第１の濾過槽２１０及び第２の濾過槽２２０の上部と下部には、それぞれ降雨流出水の出入りが可能になるように上部有孔板２０３、下部有孔板２０４が具備され、上記上部有孔板２０３は上記濾過流路２３０を定義する。ここで、上記上部有孔板２０３と下部有孔板２０４の上には、特定口径のスクリーンが具備されていてよい。 On the other hand, the filtration tank 200 is divided into a first filtration tank 210 and a second filtration tank 220 with a partition wall 201 interposed therebetween. In addition, a filtration channel 230 is provided above the first filtration tank 210 and the second filtration tank 220, and the rain effluent that has passed through the first filtration tank 210 passes through the filtration channel 230. It is supplied to the second filtration tank 220. An upper perforated plate 203 and a lower perforated plate 204 are provided at the upper and lower portions of the first filtration tank 210 and the second filtration tank 220 so that the rain effluent can enter and exit, respectively. The upper perforated plate 203 defines the filtration channel 230. Here, a screen having a specific diameter may be provided on the upper perforated plate 203 and the lower perforated plate 204.
上記第１の濾過槽２１０及び第２の濾過槽２２０のそれぞれには第１の濾材層２１１及び第２の濾材層２２１が具備され、上記第１の濾過槽２１０は、第１の濾材層２１１を利用して降雨流出水中に含まれている微細固形物を濾過及び除去する役割を果たし、上記第２の濾過槽２２０は、第２の濾材層２２１を利用して降雨流出水に収容状態で存在する栄養塩類、重金属及び炭化水素を吸着及び除去する役割を果たす。 Each of the first filter tank 210 and the second filter tank 220 includes a first filter medium layer 211 and a second filter medium layer 221, and the first filter tank 210 includes the first filter medium layer 211. The second filtration tank 220 is used to filter and remove fine solids contained in the rain effluent using the second filter medium layer 221 while being accommodated in the rain effluent. It serves to adsorb and remove existing nutrients, heavy metals and hydrocarbons.
上記第１の濾過槽２１０内に具備される第１の濾材層２１１は、浮上濾材、即ち水よりも比重が低い物質よりなる濾材から構成され、上記第１の濾材層２１１は、上記第１の濾過槽２１０の全高に対して１／２〜２／３の高さまで充填される。このように第１の濾材層２１１が浮上濾材から構成されると共に、第１の濾過槽２１０の全高に対して一部の高さまで第１の濾材層２１１が充填されることによって、第１の濾過槽２１０内において水位が上昇すると第１の濾材層２１１も上昇するようになる。このとき、上昇する第１の濾材層２１１は、上記上部有孔板２０３によってその上昇が止められ、その上昇が止まった状態で第１の濾材層２１１による降雨流出水の濾過過程が進められる。なお、上記第１の濾材層２１１は、パーライト、合成樹脂濾材などの浮上濾材から構成されていてよい。 The first filter medium layer 211 provided in the first filter tank 210 is composed of a floating filter medium, that is, a filter medium made of a material having a specific gravity lower than that of water, and the first filter medium layer 211 includes the first filter medium layer 211. The total height of the filtration tank 210 is filled to a height of 1/2 to 2/3. As described above, the first filter medium layer 211 is composed of the floating filter medium, and the first filter medium layer 211 is filled to a certain height with respect to the total height of the first filter tank 210, whereby the first filter medium layer 211 is filled with the first filter medium layer 211. When the water level rises in the filtration tank 210, the first filter medium layer 211 also rises. At this time, the rising first filter medium layer 211 is stopped from rising by the upper perforated plate 203, and the filtration process of the rain effluent by the first filter medium layer 211 is advanced in the state where the increase has stopped. The first filter medium layer 211 may be formed of a floating filter medium such as pearlite or a synthetic resin filter medium.
また、上記第１の濾過槽２１０の一方側には逆洗空気注入口２０２が具備される。上記逆洗空気注入口２０２は、上記第１の濾過槽２１０の内部と貯留槽１００の内部とを空間的に連結させ、上記貯留槽１００の水位が上記逆洗空気注入口２０２よりも低くなると、貯留槽１００内の空気が上記逆洗空気注入口２０２から上記第１の濾過槽２１０の内部に注入され、注入された空気が第１の濾過槽２１０内で乱流を誘導して究極的に第１の濾材層２１１を逆洗する役割を果たす。 In addition, a backwash air inlet 202 is provided on one side of the first filtration tank 210. The backwashing air inlet 202, and the inside of the inner and savings distillation tank 100 of the first filtration vessel 210 is spatially linked, than the water level is above backwash air inlet 202 of the savings distillation vessel 100 becomes lower, the air savings distillation tank 100 is injected into the first filtration tank 210 from the backwashing air inlet 202, injected air induces turbulence in the first filtration tank 210 Finally, it plays the role of backwashing the first filter medium layer 211.
上記第２の濾過槽２２０内に具備される第２の濾材層２２１は、水よりも比重が高い濾材の吸着濾材から構成され、上記第２の濾過槽２２０内のほぼ全ての空間を充填する形態で具備される。上記第２の濾材層２２１は、詳細的に、ゼオライト、活性炭、スラグなどから構成されていてよい。 The second filter medium layer 221 provided in the second filtration tank 220 is composed of an adsorbent filter medium having a higher specific gravity than water and fills almost all the space in the second filter tank 220. It is provided in the form. Specifically, the second filter medium layer 221 may be composed of zeolite, activated carbon, slag, or the like.
一方、上記第２の濾過槽２２０内には、上記濾過流路２３０と空間的に連結される流入水分配管２４０が具備される。上記流入水分配管２４０は、上記濾過流路２３０の降雨流出水を上記第２の濾過槽２２０の上部から所定の距離離間した位置の第２の濾材層２２１に供給する役割を果たす。 Meanwhile, an inflow moisture pipe 240 spatially connected to the filtration flow path 230 is provided in the second filtration tank 220. The inflow moisture pipe 240 plays a role of supplying the rain effluent of the filtration channel 230 to the second filter medium layer 221 at a predetermined distance from the upper part of the second filtration tank 220.
上記流入水分配管２４０を具備させる理由は次のとおりである。上記第２の濾過槽２２０が、上記濾過流路２３０からの降雨流出水を第２の濾材層２２１にて濾過を進めるが、濾過過程が下向流の降雨流出水を対象に進められることによって、上記第２の濾過槽２２０の上部に位置した第２の濾材層２２１の目詰まりが第２の濾過槽２２０の下部の第２の濾材層２２１よりも相対的に早く進行する。第２の濾過槽２２０の上部の第２の濾材層２２１の目詰まりが生じると、通水能が急激に低下し、第２の濾過槽２２０の下部の第２の濾材層２２１はその機能を失うようになる。これを防止するために流入水分配管２４０を具備させ、上記流入水分配管２４０から所定の深さにある第２の濾材層２２１内に降雨流出水が供給されることによって、第２の濾材層２２１全体による濾過過程の進行が可能になる。このとき、第２の濾材層２２１内に具備される流入水分配管２４０の一端の位置は、第２の濾材層２２１の目詰まり程度に応じて選択的に設計することができる。 The reason why the inflow moisture pipe 240 is provided is as follows. The second filtration tank 220 advances the filtration of the rain effluent from the filtration flow path 230 through the second filter medium layer 221, but the filtration process is advanced for the rain effluent flowing downward. The clogging of the second filter medium layer 221 positioned at the upper part of the second filter tank 220 proceeds relatively faster than the second filter medium layer 221 at the lower part of the second filter tank 220. When the clogging of the second filter medium layer 221 at the upper part of the second filtration tank 220 occurs, the water flow capacity is rapidly lowered, and the second filter medium layer 221 at the lower part of the second filter tank 220 has its function. I will lose. In order to prevent this, the inflow moisture pipe 240 is provided, and the rain filter and the outflow water are supplied from the inflow moisture pipe 240 into the second filter medium layer 221 at a predetermined depth, whereby the second filter medium layer 221 is provided. The entire filtration process can proceed. At this time, the position of one end of the inflow moisture pipe 240 provided in the second filter medium layer 221 can be selectively designed according to the degree of clogging of the second filter medium layer 221.
また、上記流入水分配管２４０は、その上部は無空管、その下部は有空管から構成すればよい（図５参照）。即ち、第２の濾材層２２１の表面に相応する位置に具備される部位は密閉された形態の無空管から構成し、上記無空管の下部は有空管の形態で構成することで、多方向から降雨流出水が供給できる。 In addition, the inflow moisture pipe 240 may be constituted by a non-empty pipe at the top and a hollow pipe at the bottom (see FIG. 5). That is, the portion provided at a position corresponding to the surface of the second filter medium layer 221 is configured from a sealed non-empty tube, and the lower portion of the non-empty tube is configured in the form of a hollow tube. Rain runoff water can be supplied from multiple directions.
上記第２の濾過槽２２０の一方側には流出管１０２が具備され、上記第２の濾過槽２２０で濾過過程が施された濾過水は、上記流出管１０２から外部に排出される。 An outflow pipe 102 is provided on one side of the second filtration tank 220, and the filtered water that has been filtered in the second filtration tank 220 is discharged from the outflow pipe 102 to the outside.
以上、本発明の一実施形態による無動力逆洗方式を利用した降雨流出水の処理装置について説明したが、該処理装置による無動力逆洗方式を利用した降雨流出水の処理方法は次のとおりである。本発明の一実施形態による無動力逆洗方式を利用した降雨流出水の処理方法は、大きく、流入ステップ、濾過ステップ、逆洗ステップの３つステップからなる。 As mentioned above, although the processing apparatus of the rain effluent using the non-powered backwash system by one Embodiment of this invention was demonstrated, the processing method of the rain effluent using the non-powered backwash system by this processing apparatus is as follows. It is. The method for treating rain runoff using the non-powered backwashing system according to an embodiment of the present invention is roughly composed of three steps, an inflow step, a filtration step, and a backwashing step.
<流入ステップ>
先ず、流入ステップについて説明すれば、次のとおりである。
<Inflow step>
First, the inflow step will be described as follows.
図３及び図４の(ａ)を参考すると、降雨流入管１０１から貯留槽１００内に降雨流出水が供給される（Ｓ３０１）。貯留槽１００内に流入された降雨流出水は、貯留槽１００の下部に貯留され、一定量以上降雨流出水が貯留されると、第１の濾過槽２１０の下部から上向流の形態で第１の濾過槽２１０に供給される（Ｓ３０２）。このとき、上向流の形態で第１の濾過槽２１０に降雨流出水が供給されることによって、降雨流出水中に含まれている粗大固形物や夾雑物は重力によって下降し、下降する粗大固形物や夾雑物は、貯留槽１００の下部の傾斜板に沿って移動していき、固形物貯蔵部１１０に貯蔵される。 If Figure 3 and reference in 4 (a), runoff water is supplied from a rainfall inflow pipe 101 to the savings distillation tank 100 (S301). Runoff water flowing into savings distillation vessel 100 is savings distillation bottom of the savings distillation tank 100, a certain amount or more runoff water is savings distillation, upflow from the bottom of the first filtering tank 210 Is supplied to the first filtration tank 210 (S302). At this time, when the rain effluent is supplied to the first filtration tank 210 in the form of an upward flow, the coarse solids and impurities contained in the rain effluent are lowered by gravity, and the coarse solids descend. goods and contaminants, continue to move along the inclined plate of the lower portion of the savings distillation tank 100, it is stored in a solid reservoir 110.
一方、第１の濾過槽２１０への降雨流出水流入が増大して第１の濾過槽２１０内の水位が上昇すると、第１の濾材層２１１が上昇すると共に第１の濾過槽２１０及び第１の濾材層２１１の空隙に存在する空気が流出管１０２から排出される（Ｓ３０３）。このとき、濾過槽２００の上部に逆止弁２０５が更に具備されていてよく、上記逆止弁２０５から第１の濾過槽２１０内の空気が排出されることを促進することができる。 On the other hand, when the inflow of rainfall effluent into the first filtration tank 210 increases and the water level in the first filtration tank 210 rises, the first filter medium layer 211 rises and the first filtration tank 210 and the first filtration tank 210 rise. The air present in the gap of the filter medium layer 211 is discharged from the outflow pipe 102 (S303). At this time, a check valve 205 may be further provided in the upper part of the filtration tank 200, and the discharge of air in the first filtration tank 210 from the check valve 205 can be facilitated.
<濾過ステップ>
水位の上昇に伴って上昇する第１の濾材層２１１は、図４の(ｂ)に示すように第１の濾過槽２１０の上部に具備された上部有孔板２０３によって上昇が止められ、その上昇が止まった状態（即ち、上部有孔板２０３によって支持された状態）で第１の濾材層２１１による濾過過程が進められる（Ｓ３０４）。上記第１の濾材層２１１による濾過によって降雨流出水中に含まれている微細固形物が除去される。
<Filtration step>
The first filter medium layer 211 rising as the water level rises is stopped by the upper perforated plate 203 provided in the upper part of the first filter tank 210 as shown in FIG. The filtration process by the first filter medium layer 211 is advanced in a state where the rise has stopped (that is, a state supported by the upper perforated plate 203) (S304). The fine solids contained in the rain effluent are removed by filtration by the first filter medium layer 211.
上記第１の濾材層２１１を通過した降雨流出水は濾過流路２３０に供給され、濾過流路２３０に沿って流れていった降雨流出水は最終的に第２の濾過槽２２０に供給される。上記第２の濾過槽２２０の上部から降雨流出水が供給されると、第２の濾過槽２２０の第２の濾材層２２１の空隙に存在する空気は流出管１０２から排出される（Ｓ３０５）。 The rain effluent that has passed through the first filter medium layer 211 is supplied to the filtration flow path 230, and the rain effluent that has flowed along the filtration flow path 230 is finally supplied to the second filtration tank 220. . When the rain effluent is supplied from the upper part of the second filtration tank 220, the air present in the gap of the second filter medium layer 221 of the second filtration tank 220 is discharged from the outflow pipe 102 (S305).
また、第２の濾材層２２１を通過しながら降雨流出水中に含まれている栄養塩類、重金属、炭化水素などが吸着及び除去される。このとき、第２の濾材層２２１への降雨流出水供給は、濾過流路２３０から第２の濾材層２２１の上部への供給経路の他、流入水分配管２４０から第２の濾材層２２１の内部への供給が可能であり、これにより、第２の濾材層２２１の上部の目詰まりが生じても流入水分配管２４０から第２の濾材層２２１の下部へ降雨流出水が供給されることによって、第２の濾材層２２１全体の透水性を均一に保持することができるようになる。 In addition, nutrient salts, heavy metals, hydrocarbons, and the like contained in the rain runoff water are adsorbed and removed while passing through the second filter medium layer 221. At this time, the rain runoff water supply to the second filter medium layer 221 is not limited to the supply path from the filtration channel 230 to the upper part of the second filter medium layer 221, but also from the inflow moisture pipe 240 to the inside of the second filter medium layer 221 By this, even if the clogging of the upper part of the second filter medium layer 221 occurs, the rain outflow water is supplied from the inflow moisture pipe 240 to the lower part of the second filter medium layer 221, The water permeability of the entire second filter medium layer 221 can be maintained uniformly.
一方、降雨流出水の濾過槽２００の内部への流入によって第１の濾過槽２１０及び第２の濾過槽２２０内に存在する全ての空気が流出管１０２から外に排出されることによって、濾過槽２００内には大気圧よりも低い負圧が作用するようになり、このような状態で貯留槽１００の水位が最高の水位に達すると、濾過槽２００に加えられる水頭（ｈｙｄｒａｕｌｉｃ ｈｅａｄ）は一定に保持され、降雨流出水の流入流量の変化にかかわらず一定の線速度の降雨流出水の処理が可能になる。 On the other hand, all the air present in the first filtration tank 210 and the second filtration tank 220 is discharged from the outflow pipe 102 by the inflow of the rain effluent into the filtration tank 200, thereby the filtration tank. now acts negative pressure lower than the atmospheric pressure in 200, when the water level of savings distillation tank 100 in this state reaches the highest water level, the water head applied to the filtration tank 200 (Hydraulic head) is constant Therefore, it is possible to treat the rain runoff water at a constant linear velocity regardless of the change in the inflow flow rate of the rain runoff water.
<逆洗ステップ>
上述した流入及び濾過過程が進められる状態で、降雨が終了すると貯留槽１００の水位は下降する（Ｓ３０６）。このとき、貯留槽１００の水位が濾過槽２００の高さ以下に下降しても、前述したように濾過槽２００内の圧力状態が負圧状態であることから、大気圧と負圧との圧力差によって貯留槽１００内の降雨流出水は第１の濾過槽２１０の内部に流入される。
<Backwash step>
In a state where the above-described inflow and filtration process proceeds, the water level of savings distillation tank 100 when rain is completed is lowered (S306). In this case, even when lowering the water level of savings distillation tank 100 is below the height of the filtration tank 200, since the pressure conditions in the filtration tank 200 as described above is a negative pressure, the atmospheric pressure and the negative pressure runoff water savings distillation tank 100 by the pressure differential is introduced into the first filtration tank 210.
このような状態で、貯留槽１００の水位が逆洗空気注入口２０２以下に落ちると、逆洗空気注入口２０２から第１の濾過槽２１０の内部に無動力にて空気が流入され、これにより、濾過槽２００内の負圧状態が解除される。これと同時に、図４の(ｃ)に示すように第１の濾過槽２１０内に流入された空気は乱流を誘導して第１の濾材層２１１の洗浄が進められる（Ｓ３０７）。第１の濾材層２１１の洗浄で脱離した微細固形物は、残存する降雨流出水と共に下降して固形物貯蔵部１１０に貯蔵される。説明の便宜上、図４の(ｃ)には第１の濾材層２１１の図示を省略した。 In this state, when the water level of savings distillation vessel 100 falls below a backwash air inlet 202, air is flowed in a non-powered from the backwashing air inlet 202 into the first filtration tank 210, which Thus, the negative pressure state in the filtration tank 200 is released. At the same time, as shown in FIG. 4C, the air that has flowed into the first filtration tank 210 induces turbulent flow, and cleaning of the first filter medium layer 211 proceeds (S307). The fine solid separated by the cleaning of the first filter medium layer 211 descends together with the remaining rainfall runoff water and is stored in the solid storage unit 110. For convenience of explanation, the illustration of the first filter medium layer 211 is omitted in FIG.
１００ 貯留槽
１０１ 降雨流入管
１０２ 流出管
１１０ 固形物貯蔵部
２００ 濾過槽
２０１ 隔壁
２０２ 逆洗空気注入口
２０３ 上部有孔板
２０４ 下部有孔板
２０５ 逆止弁
２１０ 第１の濾過槽
２１１ 第１の濾材層
２２０ 第２の濾過槽
２２１ 第２の濾材層
２３０ 濾過流路
２４０ 流入水分配管
100 savings distillation vessel 101 rainfall inflow pipe 102 outlet pipe 110 solid reservoir 200 filtration tank 201 partition wall 202 backwash air inlet 203 upper perforated plate 204 lower perforated plate 205 check valve 210 first filtering chamber 211 first Filter medium layer 220 Second filter tank 221 Second filter medium layer 230 Filtration flow path 240 Inflow moisture piping
Claims (17)
前記貯留槽内に具備されて降雨流出水を濾過する濾過槽を含み、
前記濾過槽は、前記貯留槽から流入される上向流の降雨流出水を濾過する第１の濾過槽と、前記第１の濾過槽を通過した下向流の降雨流出水を濾過する第２の濾過槽とを具備し、
前記第１の濾過槽内に該第１の濾過槽の全高に対して一部の高さまで充填される第１の濾材層が具備され、
前記第１の濾材層は、浮上濾材から構成されることによって、前記第１の濾過槽内の水位の上昇に伴って上昇し、前記第１の濾過槽内の水位の下降に伴って下降し、
前記第１の濾過槽下部の一方側に、前記貯留槽と前記第１の濾過槽とを空間的に連結させる下部有孔板と逆洗空気注入口がそれぞれ具備され、
前記貯留槽の水位が前記逆洗空気注入口より高くなると、前記貯留槽内の降雨流出水が前記下部有孔板と前記逆洗空気注入口を通じて前記第１の濾過槽内部に流入すると共に、前記貯留槽内に負圧が形成され、
降雨終了時、前記貯留槽の水位が前記逆洗空気注入口より低くなると、負圧により前記貯留槽内の空気が前記逆洗空気注入口を通じて前記第１の濾過槽の内部に供給されることを特徴とする無動力逆洗方式を利用した降雨流出水の処理装置。 Includes savings distillation tank for savings distillation rainfall runoff water, and a filtration tank which is equipped with filtering the runoff water to the savings distillation tank,
Said filter tank, the filtered first and filtration tank for filtering the rainfall runoff upflow that flows from the savings distillation tank, a rainfall runoff water downflow having passed through the first filtering tank 2 filtration tanks,
A first filter medium layer filled in the first filter tank to a certain height with respect to the total height of the first filter tank;
Under the first filter medium layer, by being composed of levitation filter medium, and the first rise with increasing water level in the filtering tank, with the descent of the water level within the first filter tank Down
Wherein the first one side of the filtration tank bottom, the savings distillation tank and said first filtering tank and a lower perforated plate for spatially connecting the backwash air inlet is provided respectively,
When the water level of the savings distillation tank is higher than the backwash air inlet, with rainfall runoff water in the storage tank is introduced into the first filtration tank through the backwash air inlet and the lower perforated plate , A negative pressure is formed in the storage tank,
At the end of the rain, when the water level of the storage tank becomes lower than the backwash air inlet , air in the storage tank is supplied into the first filtration tank through the backwash air inlet due to negative pressure. A device for treating rain runoff using a non-powered backwashing system.
前記第１の濾過槽を通過した上向流の降雨流出水は、前記濾過流路に沿って流れていき、前記第２の濾過槽へ下向流として供給されることを特徴とする請求項１に記載の無動力逆洗方式を利用した降雨流出水の処理装置。 The first filtration tank and the second filtration tank are partitioned with a partition wall interposed therebetween, and a filtration flow path is further provided on the first filtration tank and the second filtration tank.
The upflow rainfall effluent that has passed through the first filtration tank flows along the filtration flow path, and is supplied as a downward flow to the second filtration tank. A treatment apparatus for rain effluent using the non-powered backwashing method according to 1.
前記流入水分配管の一端は前記濾過流路に連結され、その他端は前記濾過槽の上部から所定の距離離間した第２の濾材層内に位置することを特徴とする請求項２に記載の無動力逆洗方式を利用した降雨流出水の処理装置。 A second filter medium layer is provided in the second filtration tank; an inflow moisture pipe is further provided in the second filtration tank;
The end of the inflow moisture pipe is connected to the filtration flow path, and the other end is located in a second filter medium layer spaced a predetermined distance from the upper part of the filtration tank. Rain runoff water treatment equipment using a power backwash system.
前記貯留槽内に配置された第１の濾過槽に前記貯留槽内の降雨流出水を上向流として前記第１の濾過槽に供給するステップと、
前記第１の濾過槽の水位の上昇に伴って前記第１の濾過槽の第１の濾材層が上昇し、前記第１の濾材層の上昇が止まった状態で第１の濾材層による濾過を進めるステップと、
前記第１の濾過槽と隔壁を挟んで仕切られる第２の濾過槽に前記第１の濾過槽を通過した降雨流出水を下向流として供給し、前記第２の濾過槽の第２の濾材層による濾過を進めるステップ、及び
前記貯留槽の水位の下降時に前記第１の濾過槽の一方側に形成される逆洗空気注入口から前記第１の濾過槽内に空気を注入して前記第１の濾材層の逆洗を進めるステップと、
を含むことを特徴とする無動力逆洗方式を利用した降雨流出水の処理方法。 A step of savings distillation rainfall runoff water savings distillation tank,
And supplying to said first filtering tank Runoff water as upward flow of the savings distillation tank to the first filtering tank disposed in the savings distillation tank,
As the water level of the first filtration tank rises, the first filter medium layer of the first filter tank rises, and filtration by the first filter medium layer is stopped while the rise of the first filter medium layer stops. Step forward,
Rainfall effluent that has passed through the first filtration tank is supplied as a downward flow to a second filtration tank that is partitioned with the first filtration tank and a partition, and the second filter medium of the second filtration tank is provided. step advancing filtration by layers, and the by injecting air into the first filtration tank from the backwash air inlet formed on one side of the first filtering tank during lowering of the water level of the savings distillation vessel Proceeding with backwashing of the first filter media layer;
A method for treating rainfall effluent using a non-powered backwashing system characterized in that
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| KR10-2010-0048608 | 2010-05-25 | ||
| KR1020100048608A KR101155948B1 (en) | 2010-05-25 | 2010-05-25 | Apparatus and method for water treatment to purify the storm run-off employing self-backwash |
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| KR101290298B1 (en) * | 2012-09-26 | 2013-07-29 | 신영기술개발(주) | Filtering apparatus for first rain water purification treatment |
| KR101470985B1 (en) * | 2012-10-19 | 2014-12-09 | (주) 영동엔지니어링 | Easy to back wash multiple waste water processing filtration device |
| KR101629308B1 (en) * | 2015-11-05 | 2016-06-10 | 안병기 | Non-point pollution reducing apparatus of upward flow and downward flow type |
| CN107694172A (en) * | 2017-10-25 | 2018-02-16 | 安徽万利达羽绒制品有限公司 | Sewage water filtration pond is used in a kind of goose feather processing |
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| JPS5147662A (en) * | 1974-10-23 | 1976-04-23 | Nippon Filcon Kk | |
| JPS59109212A (en) * | 1982-12-15 | 1984-06-23 | Midori Watanabe | Filtering and concentrating device |
| JPS63287508A (en) * | 1987-05-19 | 1988-11-24 | Kensetsusho Doboku Kenkyu Shocho | Method and device for filtration by floating filter medium |
| JP3121722B2 (en) * | 1994-06-14 | 2001-01-09 | 日本碍子株式会社 | Solid-liquid separation device and method of using the same |
| JP3311732B2 (en) * | 2000-05-25 | 2002-08-05 | 株式会社ホクコン | Wastewater treatment equipment |
| JP2003144814A (en) * | 2001-11-13 | 2003-05-20 | Ngk Insulators Ltd | Method for washing floating filter medium |
| JP2004290752A (en) * | 2003-03-26 | 2004-10-21 | Ngk Insulators Ltd | Method for filtering confluent sewage at high speed |
| KR100461997B1 (en) * | 2004-07-15 | 2004-12-17 | 주식회사 현진기업 | Simplicity Purifier Auto System Tank use of a Reverse Wash |
| KR100809360B1 (en) * | 2007-03-13 | 2008-03-05 | 재단법인 한국계면공학연구소 | Up and downflow two stage filter |
| KR100932154B1 (en) * | 2009-02-25 | 2009-12-16 | 최삼숙 | A non-powered water purifying plant |
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