NO145003B - PROCEDURE FOR THE PREPARATION OF A SIGNIFICANT HOMOGENIC LIQUID SOLUTION TO WASTE WASTE CLEANING - Google Patents
PROCEDURE FOR THE PREPARATION OF A SIGNIFICANT HOMOGENIC LIQUID SOLUTION TO WASTE WASTE CLEANING Download PDFInfo
- Publication number
- NO145003B NO145003B NO772399A NO772399A NO145003B NO 145003 B NO145003 B NO 145003B NO 772399 A NO772399 A NO 772399A NO 772399 A NO772399 A NO 772399A NO 145003 B NO145003 B NO 145003B
- Authority
- NO
- Norway
- Prior art keywords
- lime
- waste
- sludge
- zone
- slats
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000004140 cleaning Methods 0.000 title description 3
- 239000002699 waste material Substances 0.000 title 2
- 239000006193 liquid solution Substances 0.000 title 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 37
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 37
- 239000004571 lime Substances 0.000 claims description 37
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 14
- 241000446313 Lamella Species 0.000 claims description 13
- 239000002351 wastewater Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000004090 dissolution Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
-
- 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
- C02F1/529—Processes or devices for preparing lime water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0045—Plurality of essentially parallel plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/02—Settling tanks with single outlets for the separated liquid
- B01D21/08—Settling tanks with single outlets for the separated liquid provided with flocculating compartments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/2488—Feed or discharge mechanisms for settling tanks bringing about a partial recirculation of the liquid, e.g. for introducing chemical aids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/15—Dissolving comprising constructions for blocking or redispersing undissolved solids, e.g. sieves, separators or guiding constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/20—Dissolving using flow mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F21/00—Dissolving
- B01F21/50—Elements used for separating or keeping undissolved material in the mixer
- B01F21/502—Baffles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Detergent Compositions (AREA)
- External Artificial Organs (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Description
Oppfinnelsen angår en fremgangsmåte ved fremstilling av en The invention relates to a method for the production of a
i det vesentlige homogen kalkvannsoppløsning til rensing av av-løpsvann, hvor utgangsmaterialet for den homogene kalkvannsopp-løsning utgjøres av en kalkoppslemning. essentially homogeneous limewater solution for cleaning waste water, where the starting material for the homogeneous limewater solution consists of a lime slurry.
Oppfinnelsen angår således en fremgangsmåte ved fremstill- The invention thus relates to a method by producing
ing av en i det vesentlige homogen kalkvannsoppløsning til rens- ing of an essentially homogeneous limewater solution for cleaning
ing av avløpsvann, hvor kalk tilsettes til en kalkoppløser for å danne en kalkoppslemning, og fremgangsmåten er særpreget ved at kalkoppslemningen tilføres til den nedre del av en kalkvannbereder og i denne bringes til å stige oppad og bort fra ing of waste water, where lime is added to a lime dissolver to form a lime slurry, and the method is characterized by the fact that the lime slurry is fed to the lower part of a lime water heater and in this is made to rise upwards and away from
denne ved dens øvre del, idet kalkoppslemningen når den beveger seg oppad, bringes til å passere hellende lameller som ved sin nedre del i kalkvannberederen tilveiebringer en slamsone og der har et slikt projisert overflateareal at overflatebelastningen på de hellende lameller ved denne nedre del holdes på ca. this at its upper part, as the lime slurry, when it moves upwards, is made to pass inclined lamellas which at its lower part in the lime water treatment plant provide a sludge zone and have such a projected surface area that the surface load on the inclined lamellas at this lower part is kept at approx. .
2,5 m 3 /m 2/time, i hvilken slamsone den oppadstigende kalkoppslemning filtreres, og som ved sin øvre del i kalkvannberederen tilveiebringer en klaresone der lamellene har et tilnærmet for-doblet projisert overflateareal slik at overflatebelastningen på 2.5 m 3 /m 2 /hour, in which sludge zone the rising lime slurry is filtered, and which at its upper part in the lime water heater provides a clear zone where the slats have an approximately doubled projected surface area so that the surface load on
de hellende lameller ved denne øvre del holdes på ca. 1,25 m 3 /m 2/ time, i hvilken' klaresone de finere partikler fraskilles, og idet det ved de hellende lameller avgående kalkslam som synker til bunnen av kalkvannberederen, helt eller delvis tilbakeføres til kalkopp-løseren eller dels tas ut for å tilsettes til avløpsvann som skal renses med den fremstilte kalvannsoppløsning. the sloping slats at this upper part are kept at approx. 1.25 m 3 /m 2/ hour, in which the finer particles are separated in the clear zone, and as the lime sludge leaving at the inclined lamellas, which sinks to the bottom of the lime water heater, is returned in whole or in part to the lime dissolver or partly taken out to is added to waste water that is to be cleaned with the prepared calf water solution.
Ved den foreliggende oppfinnelse tilveiebringes en kalk-vannsoppløsning som er blitt fremstilt delvis under fullstendig utnyttelse av kalkens fnokkdannende egenskaper slik at den minst mulige mengde kalk trenger å tilsettes for å erholde optimal fnokk-dannelse, og delvis under unngåelse av uønsket carbonatdannelse etc. som fører til at det dannes belegg på maskinutstyr, bassenger, renner og ledninger. Dessuten erholdes ved den foreliggende fremgangsmåte den ytterligere fordel at restinnholdet av kalkholdige små partikler i det rensede utstrømmende vann blir meget' lavt. With the present invention, a lime-water solution is provided which has been prepared partly under complete utilization of lime's flake-forming properties so that the smallest possible amount of lime needs to be added to obtain optimal flake formation, and partly while avoiding unwanted carbonate formation etc. which leads to the formation of a coating on machine equipment, pools, gutters and cables. In addition, the present method provides the further advantage that the residual content of calcareous small particles in the purified outflowing water is very low.
Oppfinnelsen vil bli nærmere beskrevet under henvisning til tegningene hvor en anordning for utførelse av den foreliggende fremgangsmåte er vist. The invention will be described in more detail with reference to the drawings in which a device for carrying out the present method is shown.
På fig. 1 er skjematisk vist et fullstendig renseanlegg med anordningen for utførelse av den foreliggende fremgangsmåte, In fig. 1 schematically shows a complete treatment plant with the device for carrying out the present method,
på fig. 2 er mer detaljert og i større målestokk vist en seksjon av selve anordningen, dvs. en kalkvannsbereder, og on fig. 2 is shown in more detail and on a larger scale, a section of the device itself, i.e. a limescale water heater, and
på fig. 3 er vist den samme anordning sett ovenifra. on fig. 3 shows the same device seen from above.
Renseanlegget ifølge fig. 1 består av seks efter hverandre anordnede bassenger 1-6 som vannet som skal renses, passerer gjennom i rekkefølge. Bassenget 1 omfatter et sandfilter og et gitter som kan renses maskinelt. Bassenget 2 utgjøres av et luftningsbasseng hvortil aktivt slam tilsettes. Bassenget 3 er et mellomsedimenter-ingsbasseng. Til bassenget 4 tilsettes den kalkvannsoppløsning som er blitt erholdt ved anvendelse av den foreliggende fremgangsmåte og som er blitt fremstilt i anordningen 7. Et fnokkdannelses-basseng er betegnet 5 og et fIotasjonsbasseng med 6 hvorfra det rensede vann strømmer bort fra renseanlegget. Dette kan selvfølgelig varieres på en rekke måter uten at dette har noen betydning for den foreliggende fremgangsmåte. The treatment plant according to fig. 1 consists of six consecutively arranged basins 1-6 through which the water to be purified passes in sequence. The pool 1 includes a sand filter and a grid that can be cleaned mechanically. Basin 2 consists of an aeration basin to which activated sludge is added. Basin 3 is an intermediate sedimentation basin. To the pool 4 is added the lime water solution which has been obtained using the present method and which has been produced in the device 7. A floc formation pool is designated 5 and a flotation pool with 6 from which the purified water flows away from the treatment plant. This can of course be varied in a number of ways without this having any significance for the present method.
Anordningen 7 består av kalkoppløseren 8 og av kalkvannsbe-rederen 9. Kalkoppløseren 8 omfatter et oppløsningskar for opp-løsning av tørr, lesket eller ulesket kalk. I dette kar blander et røreverk 10 kalken inn i det tilførte oppløsningsvann.Som opp-løsningsvann kan det utgående, rensede avløpsvann med en pH av 10-12, biologisk renset avløpsvann eller ledningsvann anvendes. Mengden av oppløsningsvann skal være ca. 1 liter vann pr. 1,7 g kalk. The device 7 consists of the lime dissolver 8 and the lime water heater 9. The lime dissolver 8 comprises a dissolution vessel for dissolving dry, slaked or unslaked lime. In this vessel, an agitator 10 mixes the lime into the supplied dissolution water. As dissolution water, the outgoing, purified waste water with a pH of 10-12, biologically purified waste water or tap water can be used. The amount of dissolution water should be approx. 1 liter of water per 1.7 g of lime.
Kalkoppslemningen renner fra oppløsningskaret 3 til den egentlige kalkvannsbereder 9 hvori kalkoppslemningen kommer inn sentralt nedentil gjennom røret 11 i et kjegleformig rom 12 som tjener som kalkslamlomme. Kalkoppslemningen strømmer oppad og passerer derved en rekke lameller 13 og 14, hvorefter den renner av til begge sider over skibord 15 til renner 16. The lime slurry flows from the dissolution vessel 3 to the actual lime water heater 9 in which the lime slurry enters centrally at the bottom through the pipe 11 in a cone-shaped space 12 which serves as a lime sludge pocket. The lime slurry flows upwards and thereby passes a series of slats 13 and 14, after which it runs off to both sides over ski table 15 to chute 16.
Lamellene 13 og 14 har varierende lengde. I det på tegningen viste eksempel er annenhver lamell 13 lang mens de mellomliggende lameller 14 er korte. Således er lamellene 13 2 m lange og anordnet i en avstand av 15 cm fra hverandre, mens lamellene 14 bare er 1 m lange og likeledes anordnet i en avstand av 15 cm fra hverandre. The slats 13 and 14 have varying lengths. In the example shown in the drawing, every second lamella 13 is long, while the intermediate lamellas 14 are short. Thus, the slats 13 are 2 m long and arranged at a distance of 15 cm from each other, while the slats 14 are only 1 m long and likewise arranged at a distance of 15 cm from each other.
Den sone som bare berøres av de lange lameller 13, dvs. den nedre halvdel av lamellpakken, er slik dimensjonert at en stille-stående slamsone fås i dette område som bevirker filtrering av kalkoppslemningen når denne passerer oppad gjennom slamsonen. I The zone which is only touched by the long slats 13, i.e. the lower half of the slat pack, is dimensioned in such a way that a stagnant sludge zone is obtained in this area which causes filtration of the lime slurry when it passes upwards through the sludge zone. IN
det ovenfor beliggende lamellområde med det dobbelte antall lameller 13 og 14 dannes en klaresone hvori de finere partikler fraskilles når kalkvannet beveger seg oppad. the lamella area located above with twice the number of lamellas 13 and 14 forms a clear zone in which the finer particles are separated when the lime water moves upwards.
Den slamsone san dannes av kalkoppslemningen som stiger oppad,fås således ved at overflatebelastningen på lamellene 13 ved den nedre del er vesentlig større enn overflatebelastningen på lamellene 13 og 14 ved den øvre del som er forsynt med klarings-sonen. Således er overflatebelastningen på lamellene 13 ved den nedre del som er forsynt med slamsonen, ca. dobbelt så stor som overflatebelastningen på lamellene 13 og 14 ved den øvre del som er forsynt med klaresonen. Overflatebelastningen på lamellene 13 ved den nedre del som er forsynt med slamsonen, skal være ca. 2,5 m 3 /m 2 pr. time, mens overflatebelastningen på lamellene The sludge zone formed by the lime slurry that rises upwards is thus obtained by the surface load on the lamellas 13 at the lower part being significantly greater than the surface load on the lamellas 13 and 14 at the upper part which is provided with the clearance zone. Thus, the surface load on the slats 13 at the lower part, which is provided with the mud zone, is approx. twice as large as the surface load on the lamellas 13 and 14 at the upper part which is provided with the clear zone. The surface load on the slats 13 at the lower part, which is provided with the mud zone, must be approx. 2.5 m 3 /m 2 per hour, while the surface load on the slats
13 og 14 ved den øvre del som er forsynt med klaresonen, 13 and 14 at the upper part which is provided with the clear zone,
skal være ca. 1,25 m 3 /m 2 pr. time. Overflatebelastningene be-regnes ut fra lamellenes projiserte overflater. should be approx. 1.25 m 3 /m 2 per hour. The surface loads are calculated from the projected surfaces of the slats.
Slammet som følger lamellene og oppsamles i bunnkjeglen 12, har ca. 10-15.ganger mere faststoff en slamvannet i slamsonen og opptar ca. en tiendedel av rommet mellom lamellene 13. Kalk-slammet som er blitt oppsamlet i bunnkjeglen 12, pumpes delvis tilbake til kalkoppløsningskaret 8, mens det gjenværende kalk- The sludge that follows the slats and is collected in the bottom cone 12 has approx. 10-15 times more solids than the sludge water in the sludge zone and occupies approx. one-tenth of the space between the slats 13. The lime sludge that has been collected in the bottom cone 12 is partially pumped back to the lime dissolution vessel 8, while the remaining lime-
slam under innvirkning av tyngdekraften renner ned til renseverks-enheter (f.eks. forbehandlingsanlegget) anordnet foran det sted hvor kalkvann tilsettes til avløpsvannet. Mengden av kalkslam som pumpes tilbake til oppløsningskaret 8, må i praksis bestemmes i hvert enkelt tilfelle beroende bl.a. på sand- og forurensnings-mengden i den anvendte kalk. Kalkslampumpen er betegnet ned 17, sludge under the influence of gravity flows down to treatment plant units (e.g. the pre-treatment plant) arranged in front of the place where lime water is added to the waste water. The amount of lime sludge that is pumped back to the dissolution vessel 8 must in practice be determined in each individual case depending on, among other things, on the amount of sand and pollution in the lime used. The lime sludge pump is designated down 17,
og denne tilbakefører via ledningen 18 kalk til kalkoppløsnings-karet 8 og tilbakefører via ledningen 19 kalk til forbehandlingsanlegget. and this returns via line 18 lime to the lime dissolution vessel 8 and returns via line 19 lime to the pre-treatment plant.
Doseringen av kalk utføres ved 20, og doseringen av kalkvanns-oppløsning til avløpsvannet utføres ved 21. The dosing of lime is carried out at 20, and the dosing of limewater solution to the waste water is carried out at 21.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7607957A SE411519B (en) | 1976-07-12 | 1976-07-12 | PROCEDURE FOR DOSING LALK TO THE WASTE WATER, WHEN A Lime SLIMM IS CREATED AND PROVIDED BY A LAMELY DIMENSION DEVICE BEFORE SETTING THE WASTE WATER |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO772399L NO772399L (en) | 1978-01-13 |
| NO145003B true NO145003B (en) | 1981-09-14 |
| NO145003C NO145003C (en) | 1981-12-28 |
Family
ID=20328456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO772399A NO145003C (en) | 1976-07-12 | 1977-07-06 | PROCEDURE FOR THE PREPARATION OF A SIGNIFICANT HOMOGENIC LIQUID SOLUTION TO WASTE WASTE CLEANING |
Country Status (10)
| Country | Link |
|---|---|
| AT (1) | AT353710B (en) |
| CA (1) | CA1100383A (en) |
| CH (1) | CH631686A5 (en) |
| DE (1) | DE2731271C2 (en) |
| ES (1) | ES460625A1 (en) |
| FI (1) | FI64745C (en) |
| GB (1) | GB1541531A (en) |
| GR (1) | GR63591B (en) |
| NO (1) | NO145003C (en) |
| SE (1) | SE411519B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1315703C (en) * | 1989-09-29 | 1993-04-06 | Robert Cyr | Apparatus for the decantation treatment of liquid containing therein suspended material |
| ES2066727B1 (en) * | 1993-06-04 | 1995-10-16 | Compania Depuradora De Aguas R | PROCEDURE AND INSTALLATION OF WASTEWATER TREATMENT IN PHYSICOCHEMICAL TREATMENT PLANTS. |
| FR2816937B1 (en) * | 2000-11-17 | 2003-08-15 | Omnium Traitement Valorisa | PROCESS FOR PRODUCING LIME WATER USING A LIME SLURRY BED SATURATOR USING AT LEAST ONE FLOCCULATING AGENT |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1517478A1 (en) * | 1961-08-02 | 1969-08-28 | Pintsch Bamag Ag | Plant for the production of clear, evenly saturated lime water |
| FR2132954A5 (en) * | 1971-04-02 | 1972-11-24 | Degremont |
-
1976
- 1976-07-12 SE SE7607957A patent/SE411519B/en not_active IP Right Cessation
-
1977
- 1977-07-06 NO NO772399A patent/NO145003C/en unknown
- 1977-07-07 FI FI772135A patent/FI64745C/en not_active IP Right Cessation
- 1977-07-08 GR GR53921A patent/GR63591B/en unknown
- 1977-07-08 CA CA282,323A patent/CA1100383A/en not_active Expired
- 1977-07-11 CH CH864977A patent/CH631686A5/en not_active IP Right Cessation
- 1977-07-11 ES ES460625A patent/ES460625A1/en not_active Expired
- 1977-07-11 AT AT497277A patent/AT353710B/en not_active IP Right Cessation
- 1977-07-11 GB GB28953/77A patent/GB1541531A/en not_active Expired
- 1977-07-11 DE DE2731271A patent/DE2731271C2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AT353710B (en) | 1979-11-26 |
| FI772135A (en) | 1978-01-13 |
| NO772399L (en) | 1978-01-13 |
| CA1100383A (en) | 1981-05-05 |
| ATA497277A (en) | 1979-04-15 |
| ES460625A1 (en) | 1978-05-16 |
| FI64745B (en) | 1983-09-30 |
| GB1541531A (en) | 1979-03-07 |
| DE2731271C2 (en) | 1986-03-27 |
| DE2731271A1 (en) | 1978-01-19 |
| NO145003C (en) | 1981-12-28 |
| FI64745C (en) | 1984-01-10 |
| GR63591B (en) | 1979-11-26 |
| SE411519B (en) | 1980-01-14 |
| CH631686A5 (en) | 1982-08-31 |
| SE7607957L (en) | 1978-01-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2245587A (en) | Liquid treating apparatus | |
| GB1578050A (en) | Method for separating pollutants from liquid | |
| EP2028161A1 (en) | Device and method for regaining magnesium ammonium phosphate from sewage sludge | |
| JP6292612B2 (en) | River water clarification method | |
| US2129181A (en) | Liquid purification plant | |
| NO145003B (en) | PROCEDURE FOR THE PREPARATION OF A SIGNIFICANT HOMOGENIC LIQUID SOLUTION TO WASTE WASTE CLEANING | |
| US4110211A (en) | Process for the preparation of a substantially homogeneous lime water solution | |
| US3300403A (en) | Sewage treatment | |
| US1932531A (en) | Apparatus for extracting gold from solutions | |
| US2233218A (en) | Water purification system | |
| CN210496797U (en) | Spiral sand washer with water recycling function | |
| US3881700A (en) | Water treatment plant | |
| US1715438A (en) | Sewage-treatment plant | |
| DE19523113C2 (en) | Device for separating solids from liquids | |
| Bond | Upflow Solids Contact Basin | |
| Dittoe et al. | DISPOSAL OF SLUDGE AT WATER PURIFICATION AND SOFTENING WORKS OF THE MAHONING VALLEY SANITARY DISTRICT [with DISCUSSION] | |
| DE424719C (en) | Process for dewatering fine coal | |
| Fischer et al. | Current Developments and Trends in Sewage Treatment | |
| Logan | Scum Removal by Vacuator at Palo Alto | |
| Rankin | Municipal Water Softening in Kansas | |
| SU14489A1 (en) | A device for treating water in order to protect iron water pipes from corroding | |
| DE975200C (en) | Plant for decarbonising water, in particular with high carbonate hardness, comprising a reactor and a filter | |
| SU942785A1 (en) | Apparatus for cleaning water | |
| Reuning | Disposal of Vegetable Tanning Wastes | |
| DE494698C (en) | Device for the separate separation of floating and sinking matter in fresh water treatment plants |