EP0923505A1 - Procede et equipement de traitement au large des eaux d'egouts communales - Google Patents

Procede et equipement de traitement au large des eaux d'egouts communales

Info

Publication number
EP0923505A1
EP0923505A1 EP98905208A EP98905208A EP0923505A1 EP 0923505 A1 EP0923505 A1 EP 0923505A1 EP 98905208 A EP98905208 A EP 98905208A EP 98905208 A EP98905208 A EP 98905208A EP 0923505 A1 EP0923505 A1 EP 0923505A1
Authority
EP
European Patent Office
Prior art keywords
equipment
technological
treatment
carrier
fact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98905208A
Other languages
German (de)
English (en)
Inventor
Zdenek Davidek
Jiri Karlach
Jir I C Ejka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Skoda JS AS
Original Assignee
Skoda JS AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Skoda JS AS filed Critical Skoda JS AS
Publication of EP0923505A1 publication Critical patent/EP0923505A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
    • 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
    • C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle

Definitions

  • the invention concerns a method of treating communal sewage water from medium-sized and larger sources of pollution, especially in maritime areas, and equipment to carry out this method.
  • This equipment is composed of the floating body of the carrier of the technological equipment which is anchored and is made up of at least one pontoon with a double bottom, where the bottom is in the shape of a circle or at least a quadrangle, and a double casing, in which watertight chambers are arranged and where the relation of the width B of the body of the carrier to its draught T is in a range from 8.5 to 12.5 and the metacentric radius r 0 of the body of the carrier is in a range from 15 to 16.
  • the watertight chambers of the divided bottom make up ballast tanks to balance the changing weight relations in the treatment of the sewage water.
  • the double bottom and casing of the floating body of the carrier of the technological equipment ensures ecological safety in the event of any breakdown in the impermeability of the plant, the watertight chambers serve in such a case as safety cisterns.
  • the watertight chambers of the divided double bottom are also partially used to advantage as ballast tanks to balance the changing weight relations in the treatment plant process.
  • the shape of the body of the carrier and the relations given for its width and draught and also its metacentric radius have an effect on achieving the highest possible stability of the floating body of the carrier against inclinations in all directions. Thanks to this shape the maximum amount of surface moment of inertia of the main water line is achieved, which influences how high the metacentric height is.
  • the stability of the floating body of the carrier is a necessary condition in ensuring the technological function of the installed purification equipment, which works on the basis of the gravitational flow of the treated water between individual treatment stages.
  • the relation of the width B of the body of the carrier to its draught T is to advantage in a range from 10.3 to 11.3 and the metacentric radius r 0 of the body of the carrier is to advantage in a range from 21 to 22.5. In these ranges the highest amount of stability of the floating body of the carrier is achieved.
  • the equipment for purifying communal sewage water according to this invention is designed to be located on a wavy surface with a wave height up to one metre, under these conditions the inclination of the floating body of the carrier is approximately 1°.
  • the technological tank of the plant with the greatest open water area is to advantage situated at the centre of the body of the carrier and another two technological tanks of the plant with the second and third greatest open water area are arranged opposite each other and are mutually connected around its circumference.
  • the technological tank of the plant with the greatest open water area is best in a circular shape. With this arrangement of tanks their buffer action is made use of to reduce the extent of inclination of the body of the carrier.
  • All three technological tanks have to advantage a joint plane of syrnmetry which is orientated in the direction of the dominant winds. This contributes to increasing the stability of the body of the carrier.
  • Equipment according to this invention can contain mutually connected bodies of carriers, for example with the aid of pins and bolted joints.
  • a greater number of floating bodies of carriers means the capacity of the plant can be adapted to the varying demands both in the course of a season and at the place of location.
  • An advantage of this invention is the fact that it is possible to utilize relatively cheap treatment technology which is arranged on the floating body with a high stability against tipping. This ensures a sufficiently stable surface in the tanks of the treatment equipment with an open water area.
  • FIG. 1-5 For better clarification of the invention examples of the invention workmanship are depicted in the appended Figures 1-5, which are subsequently described in more detail.
  • the floating equipment for communal sewage water treatment is depicted in graphic form in Fig.l in its axonometric projection, containing the technological equipment with tanks with an open water area to which sewage water is supplied through pipes.
  • the octagonal floating body of the carrier of the technological equipment of the plant is given as a top view in Fig. 2 with a schematic diagram of individual pieces of equipment located on it, vertical cross sections of the equipment are given in Figs. 1 and 5 according to Fig. 2 in two planes perpendicular on themselves going through the centre of the equipment.
  • Fig. 4 the equipment according Fig. 2 can be seen in a horizontal cross section with the layout of the technological equipment.
  • the equipment for communal sewage water treatment containing the technological equipment with tanks with an open water area according to this invention, is arranged on the floating carrier .1, made up of a steel modular construction.
  • the pontoon has a double bottom 24 in the form of a polygon (this can be a square, rectangle, octagon, etc.) or a circle, and the double casing 23, in which the watertight chambers are arranged.
  • the size of the diagonal or diameter of the bottom can be 32 metres, the height of the casing 7 metres.
  • the watertight chambers ensure ecological safety in the event of any breakdown in the impermeability of the plant and serve as safety cisterns.
  • the chambers of the divided double bottom 24 can also be partially utilized as ballast tanks to balance the changing weight relations in the process of the plant's work.
  • Built into the mentioned steel construction of the floating body of the carrier 1. is the technological equipment of the plant, including tanks made of rustless steel for the captation of sewage water in the course of the treatment process. This sewage water is supplied to the equipment through pipes (not in the diagram).
  • the shape of the bottom 24 of the body of the carrier !_ of the technological equipment (a circle, or polygon - at least a quadrangle) is important in achieving the greatest possible stability of this body against inclination in all directions by the same amount of the stability moment (the moment given by the size of the arm of stability occurring because of a shift in the gravitational centre of the displacement in the event of the floating body being deflected from its equilibrium).
  • the ratio of the side height H to the draught T of this body of the carrier 1_ is at least 2.2 and the ratio of the diameter or diagonal d of its bottom to the draught t is at least 12.8.
  • the ratio of the width B of the body of the carrier 1_ to its draught T is to advantage in the range from 10.3 to 11.3.
  • the floating body of the carrier 1 is designed for location on a wavy surface with a wave height up to one metre.
  • the equipment for communal sewage water treatment containing technological equipment with tanks with an open water area, is designed for medium-sized and larger urban sources of pollution lying on the sea coast.
  • the method of solution takes place in module form in two basic sizes which differ in the technological stabilization of the plant's sludge.
  • One of them (designed for an agglomeration with from 5,000 to 20,000 connected inhabitants) works with the full aerobe, joint stabilization of sludge, the second (designed for agglomerations with from 25,000 to 100,000 inhabitants) works with the full anaerobe stabilization of sludge.
  • Individual modules can be connected in from twos to fours depending on the size of the pollution source.
  • the location of the equipment is suitable in a protected inlet or behind a protective breakwater in a place providing a depth of water of 4 metres with the wave height not exceeding approximately one metre away from a residential or recreational zone on the surface of the sea.
  • the whole facility is fixed by anchoring chains tied to anchoring blocks on the seabed.
  • Sewage water from housing agglomerations is removed via sectioned drainage into underground accumulation tanks of the pumping station, located on the coast at the shortest possible distance from the anchorage site of the floating equipment according to the invention. From this pumping station sewage water is pumped to the equipment through floating piping or piping placed on the seabed. At the pumping station pumps are used requiring no mechanical protection, with high profile continuity of hard particles.
  • Sewage water is transferred to the stage 2 of rough pre-treatment (a combination of mechanical and hydraulic treatment), where rakings (rough impurities), sand and fats are removed. These components are placed partially in containers 4 (caught and extracted substances) and partially packed into foil (rakings).
  • sewage water is conducted down a gradient to the biological stage of treatment, containing a contactor 6, denitrification tank 7, nitrification tank 9 and induction tank 10 with scraping of the bottom and surface and with the submerged collection of offset water.
  • the aerobe treatment process (with the use of blowers 8) takes place in these tanks in the usual manner.
  • Sludge farming is connected with the biological stage of treatment, made up of a multipurpose two-chamber tank 11.
  • the homogenization tank 14 with mechanical sludge storage.
  • Two diesel aggregates 2 _ (200 kVA) are located in the body of the carrier 1_ for the functioning of the plant which alternately switch in order that uninterrupted operation of the plant is ensured.
  • the whole floating facility secures living conditions for the service staff supervising the fully automated running of the sewage water treatment plant.
  • Once a week compressed sludge, rakings, extracted sand and fats are removed with the service vessel for the further utilization of raw materials extracted from the treatment process.
  • Removed, stabilized sludge can be used to advantage in the event of its appropriate quality to fertilize agricultural land directly, to produce compost or for recultivations.
  • Final liquidation of rakings and fats is expected at a dumping site or in a communal waste incinerator.
  • Final liquidation of sand is also expected at a dumping site or again in the production of compost.
  • the spacing of individual tanks of the technological equipment of the plant with regard to the total configuration of the floating body of the carrier 1 of the technological equipment is selected in such a manner that the lowest possible influence is achieved of free, open surfaces of the water area on the stability of the whole floating body.
  • the technological tank of the plant with the greatest open water area (the induction tank H)) is located in the middle of the body of the carrier 1 ⁇ and another two technological tanks of the treatment plant with the second and third greatest open water area (the denitrification tank 7, the nitrification tank 9) are arranged opposite each other around its circumference.
  • the connection of these tanks has the effect of a buffer element lowering the amount of inclination of the floating body of the carrier 1.
  • the communal sewage water treatment plant according to this invention in its given configuration is a design fully secured with its own energy resources, alternatively the necessary electrical energy can be supplied from the shore.
  • a management and control work point, microlaboratory equipped in the relevant manner e.g., for semi-automatic setting of the biochemical consumption of oxygen 5, chemical consumption of oxygen, turbidity metering, etc.
  • workshop space and a storeroom for replacement parts, and social facilities for the service staff can also be located on it.
  • the output of the treatment equipment can be adapted to the size of the pollution source in the course of a season (important in tourist areas) and with the development of construction in a given locality.
  • the sectional nature of the ship construction and the total module lay-out make the transfer of equipment according to this invention possible in the form of pressure assembly to the place it is located.
  • the equipment according to the invention is designed for the treatment of communal sewage water from medium-sized and larger residential sources of pollution situated on the sea coast.

Abstract

Les eaux d'égouts provenant d'une agglomération résidentielle sont accumulées sur la côte puis pompées par des canalisations jusqu'à au moins un corps flottant ancré d'une structure porteuse d'un équipement technologique, où elles sont traitées, et les eaux d'égouts traitées sont partiellement utilisées sous forme d'eau de service dans le processus de traitement et partiellement rejetées, alors que les substances retenues et séparées au cours du processus technologique de traitement sont stockées et/ou conditionnées et ensuite évacuées pour une liquidation ou une utilisation finale. L'équipement de traitement des eaux d'égouts communales comprend un équipement technologique présentant des réservoirs dotés d'une surface d'eau ouverte, auxquels l'eau d'égout est acheminée par des canalisations. Il se compose au moins d'un corps flottant de la structure porteuse (1) de l'équipement technologique, lequel est ancré et comprend au moins un ponton doté d'un double fond (24) de forme circulaire ou au moins quadrangulaire, ainsi que d'une enveloppe double (23) dans lequel sont ménagés des compartiments étanches. Le rapport entre la largeur B du corps de la structure porteuse (1) de l'équipement technologique et son tirant d'eau (T) est compris dans la plage allant de 8,5 à 12,5 et le rayon métacentrique rO du corps de la structure porteuse (1) de l'équipement technologique est compris dans la plage allant de 15 à 26. Les compartiments étanches du double fond cloisonné (24) forment des réservoirs de ballast destinés à stabiliser les rapports pondéraux changeant se produisant au cours du traitement des eaux d'égouts.
EP98905208A 1997-07-03 1998-03-05 Procede et equipement de traitement au large des eaux d'egouts communales Withdrawn EP0923505A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CZ972114A CZ285328B6 (cs) 1997-07-03 1997-07-03 Způsob čištění komunálních odpadních splaškových vod a zařízení k provádění tohoto způsobu
CZ211497 1997-07-03
PCT/CZ1998/000010 WO1999001388A1 (fr) 1997-07-03 1998-03-05 Procede et equipement de traitement au large des eaux d'egouts communales

Publications (1)

Publication Number Publication Date
EP0923505A1 true EP0923505A1 (fr) 1999-06-23

Family

ID=5464394

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98905208A Withdrawn EP0923505A1 (fr) 1997-07-03 1998-03-05 Procede et equipement de traitement au large des eaux d'egouts communales

Country Status (5)

Country Link
EP (1) EP0923505A1 (fr)
CZ (1) CZ285328B6 (fr)
HR (1) HRP980033A2 (fr)
SK (1) SK31199A3 (fr)
WO (1) WO1999001388A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20010024A1 (it) * 2001-01-10 2002-07-10 Consiglio Naz Della Ricerche Procedimento e impianto per la biodepurazione sottomarina di acque reflue scaricate in mare
US7306724B2 (en) 2004-04-23 2007-12-11 Water Standard Co., Llc Wastewater treatment
RU204971U1 (ru) * 2018-01-17 2021-06-21 Валентин Феодосьевич Чернявский Понтонный блок

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0165328A1 (fr) * 1984-06-19 1985-12-27 Intekta S.A. Installation à grande échelle pour le traitement d'eau usée
US5032289A (en) * 1988-08-12 1991-07-16 Martineau Andre P In situ off-shore processing of urban sewage without using or contaminating urban land
JPH02180697A (ja) * 1988-12-28 1990-07-13 Hitachi Zosen Corp 汚水ないし汚泥処理における廃熱を利用した生物学的処理方法
DE4310512A1 (de) * 1993-03-31 1994-10-06 Weismann Hein Friedrich Dipl I Anlage zur Behandlung von Abwasser und Müll
ATE225277T1 (de) * 1996-03-12 2002-10-15 John Leon Allen Offshore vorrichtung und anlage zur abwasserbehandlung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9901388A1 *

Also Published As

Publication number Publication date
HRP980033A2 (en) 1999-06-30
CZ285328B6 (cs) 1999-07-14
CZ211497A3 (cs) 1999-01-13
WO1999001388A1 (fr) 1999-01-14
SK31199A3 (en) 2000-03-13

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