EN 12255-11:2001
(Main)Wastewater treatment plants - Part 11: General data required
Wastewater treatment plants - Part 11: General data required
This part of this European Standard specifies data which is are necessary for the planning, design, bidding, guarantees, construction, start-up and compliance testing of a wastewater treatment plant or parts of it.
Kläranlagen - Teil 11: Erforderliche allgemeine Angaben
1 Anwendungsbereich
Diese Europäische Norm legt allgemeine Grundlagen für die Planung, Ausschreibung, Auslegung, Angebots-erstellung,
Festlegung von Garantiewerten, Errichtung, Inbetriebnahme und Abnahmeprüfung von Kläranlagen
oder Teilen von Kläranlagen fest.
Die Unterschiede in Planung und Bau von Kläranlagen in Europa haben zu einer Vielzahl von Vorgehensweisen
geführt. Diese Europäische Norm enthält grundsätzliche Angaben zu den Vorgehensweisen; sie beschreibt
jedoch nicht alle Einzelheiten jeder Vorgehensweise.
Die in den Literaturhinweisen aufgeführten Unterlagen enthalten Einzelheiten und Hinweise, die im Rahmen
dieser Norm verwendet werden dürfen.
Stations d'épuration - Partie 11: Informations générales exigées
1 Domaine d'application
La présente norme européenne spécifie les données nécessaires pour la planification, la conception, la proposition, les garanties de performance, la construction, la mise en service et le contrôle de conformité d'une station d'épuration des eaux usées ou d'une partie de cette station.
Des différences en matière de traitement des eaux usées résiduaires à travers l'Europe ont conduit au développement de systèmes variés. La présente norme donne les informations de base sur les systèmes et n'a pas eu pour objectif d'essayer de spécifier tous les systèmes disponibles.
Des informations détaillées complémentaires à celles contenues par la présente norme peuvent être obtenues en se reportant à la bibliographie.
Čistilne naprave za odpadno vodo - 11. del: Splošni zahtevani podatki
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.DWNLKläranlagen - Teil 11: Erforderliche allgemeine AngabenStations d'épuration - Partie 11: Informations générales exigéesWastewater treatment plants - Part 11: General data required13.060.30Odpadna vodaSewage waterICS:Ta slovenski standard je istoveten z:EN 12255-11:2001SIST EN 12255-11:2001en01-december-2001SIST EN 12255-11:2001SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12255-11March 2001ICS 13.060.30English versionWastewater treatment plants - Part 11: General data requiredStations d'épuration - Partie 11: Informations généralesexigéesKläranlagen - Teil 11: Erforderliche allgemeine AngabenThis European Standard was approved by CEN on 4 February 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12255-11:2001 ESIST EN 12255-11:2001
Page 2EN 12255-11:2001ContentsPageForeword. 31Scope. 32Normative references. 33Terms and definitions. 44Client options. 45Basic design data required. 55.1Loading data. 55.2Effluent quality, requirements for the disposal of residues and sludge. 65.3Site description. 75.4Additional data required. 75.5Time schedule. 85.6Start-up and guarantee testing. 85.7Operational cost information. 86Documents to be provided by a turn-key contractor or the consulting engineer. 96.1Complete documents. 96.2Design options. 96.3Proposed solution. 96.4Calculation and presentation of costs. 9Bibliography. 11SIST EN 12255-11:2001
Page 3EN 12255-11:2001ForewordThis European Standard has been prepared by Technical Committee CEN/TC 165 "Waste water engineering", thesecretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by September 2001, and conflicting national standards shall be withdrawn at the latestby December 2001.It is the eleventh part prepared by the working groups CEN/TC 165/WG 42 und WG 43 relating to generalrequirements and processes for wastewater treatment plants for more than 50 PT. The parts of the series are asfollows:Part 1:General construction principlesPart 3:Preliminary treatmentPart 4:Primary settlementPart 5:Lagooning processesPart 6:Activated sludge processesPart 7:Biological fixed-film reactorsPart 8:Sludge treatment and storagePart 9:Odour control and ventilationPart 10:Safety principlesPart 11:General data requiredPart 12:Control and automation1)Part 13:Chemical treatmentPart 14:Disinfection1)Part 15:Measurement of the oxygen transfer in clean water in activated sludge aeration tanksPart 16:Physical (mechanial) filtration1)NOTE For requirements on pumping installations at wastewater treatment plants, provided initially as part2 "Pumping installations for wastewater treatment plants", see EN 752-6 "Drain and sewer systems outsidebuildings – Part 6: Pumping installations".The parts EN 12255-1, EN 12255-3 to EN 12255-8, EN 12255-10 and EN 12255-11 were implemented together asa European package (Resolution BT 152/1998). The date of withdrawal (dow) of all conflicting national standards is2001-12-31. Until the date of withdrawal is reached the National and the already published European standards bothcoexist.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.1
ScopeThis European Standard specifies data which is necessary for the planning, design, bidding, performanceguarantees, construction, start-up and compliance testing of a wastewater treatment plant or parts of it.Differences in wastewater treatment throughout Europe have led to a variety of practices being developed. Thisstandard gives fundamental informations about the practices; this standard has not attempted to specify all availablepractices.Detailed information additional to that contained in this standard may be obtained by referring to the bibliography. 2
Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 1085Wastewater treatment – Vocabulary
1) in preparationSIST EN 12255-11:2001
Page 4EN 12255-11:2001prEN 12255-1:1996Wastewater treatment plants – Part 1: General construction principles3
Terms and definitionsFor the purposes of this European Standard the terms and definitions given in EN 1085 and the following apply:3.1plant a new wastewater treatment plant; an upgrading or extension of an existing wastewater treatment plant or a part ofa new or extended wastewater treatment plant (e. g. sludge handling facilities)3.2client a municipality, city or other organisation which intends to build a wastewater treatment plant or parts thereof, or itsrepresentative [prEN 12255-1:1996]3.3
functional tender
a tender document that contains the design loads, a description of the site where the plant is to be erected, therelevant discharge limits and any additional requirementsNOTE Turn-key contractors design the plant on the basis of the requirements and plans specified by theclient (possibly with the assistance of a consulting engineer) and give bids on the plant as a whole inaccordance with an overall guarantee. The turn-key contractor who secures the contract is responsible for theconstruction and the start-up of the plant as well as for the compliance with requirements demanded in thetender documents (turn-key project).3.4sectional tender tender documents prepared for different sections of work for a plant NOTE e. g. earth work, concrete work, mechanical equipment, electrical installations, buildings etc. A plantis normally designed by a consulting engineer. Different companies may get the commission for the differentsections. A consulting engineer may be commissioned to coordinate and to supervise the work.3.5
consulting engineer an independant engineer commissioned by the client designing a plant or parts of it and/or supervising theconstructionNOTE He may assist the client with any work preparing all or part of the tender documents. He supervisesthe construction and checks the time schedule and costs. The consulting engineer has knowledge andexperience in planning, design and operational aspects of wastewater treatment plants. In some countries aspecial certification may be required.3.6
turn-key contractor a contractor building a plant or parts of it as a wholeNOTE The turn-key contractor is a company which has knowledge and experience in planning, design,construction and operational aspects of wastewater treatment plants.4
Client optionsThe client decides whether a functional tender or a sectional tender shall be prepared.The client may commission a consulting engineer to carry out one or more of the following:– establish the design loads and data as described in clause 5;– prepare the tender documents for a functional tender;– design the plant and estimate the costs and prepare the tender documents for the sectional tender;– inspect the construction in case of functional tendering;– supervise and coordinate the construction in case of sectional tendering;– evaluate the bids on the tenders and to propose which contractor or contractors (in case of sectional tendering)should be commissioned.SIST EN 12255-11:2001
Page 5EN 12255-11:20015
Basic design data requiredWhere applicable the following basic data either measured or estimated shall be provided by the client or hisrepresentative e. g. consulting engineer.5.1
Loading data5.1.1
Sewerage systemThe data on the sewerage system should include:– areas served by combined and/or separate sewers;– proportions of flows and loads from separate and/or combined sewer systems in dry weather conditions;– storage capacity for storm water within the sewerage system;– potential to control and balance flows and loads within the sewerage system;– infiltration flows in dry weather conditions and their seasonal fluctuations (where appropriate);– septic and corrosive components of the wastewater.5.1.2
Population servedThe data on the population served shall include:– current population connected to the sewerage system;– population connected at start-up of the plant;– population connected at design horizon;– seasonal variations of population (e. g. holiday periods);– weekly variations of population (e. g. movement of commuting population).5.1.3
Significant trades and industriesA list of trades and industries which discharge significant loads to the sewerage system should include the followingflows and loads e. g.:– COD, BOD5, KN, NH4-N, NO3-N, total phosphorus, total suspended solids, organic suspended solids, salinityand alkalinity;shown as current, start-up, and design target data for:– hourly peak (m3/h, kg/h);– weekly peak day (m3/d, kg/d);– maximum weekly average (m3/week, kg/week);– annual average (m3/a, kg/a).In addition, for trades and industries with seasonal fluctuations the periods of high and low loads shall be includedpreferably as an annual diagram.The client shall specify dischargers who handle hazardous, toxic or inhibitory material and identify which precautionsare necessary to prevent that hazardous, toxic or inhibitory materials being discharged.Organic discharges with low biodegradability should be specified.5.1.4
Data from existing wastewater treatment plantsThe loading data and the operational results of the existing wastewater treatment plants contain valuable information.As a minimum the following data for at least the previous year shall be provided:– annual wastewater flow (m3/a), proportions treated physically, chemically and biologically;– average quantity (m3/d) and composition of sludge with % solids, and % volatile solids content and heavymetals;– annual quantity of screenings, grit and floatables;– average volume of liquor from sludge treatment (m3/d) and organic and nutrient content;– average quantity of digester gas (m3/d);SIST EN 12255-11:2001
Page 6EN 12255-11:2001– electrical energy produced from digester gas (kWh/a);– electrical energy consumed (kWh/a);– probability plots and diagrams showing the following over a year wastewater flows (m3/d) and the daily loadsof COD, BOD5, KN, NH4-N, NO3-N, total phosphorus, total suspended solids, organic suspended solids, salinityand alkalinity;– seasonal temperature of the wastewater or biological reactor temperatures over a year;– diurnal fluctuation of the wastewater flow at dry weather conditions;– peak flow at storm water conditions (m³/h);– amount and loads of other wastes than wastewater being delivered to the plant (e. g. night soil) and– performance of the treatment plant.5.1.5
Design flows and loadsThe design flows and loads shall be based on the present flows and loads considering growth or decrease of thepopulation, the trades and the industries and future connections of other communities, trades and industries. If thereare no means to measure the present flows and loads the design data may be based on the projected population.In addition to the population the specific dry weather flow, l/(population × d), a peak factor considering storm waterand infiltration water and the specific loads in g/(population × d) of COD, BOD5, KN, NH4-N, NO3-N, total phosphorus,total suspended solids and organic suspended solids have to be provided. Flows and loads of trades and industriesshould be determined by measurements at the sites.The following design data should be provided:– maximum hourly wastewater flow Qmax (l/s) reaching the plant and the probable duration;– details of discharge limits for storm water e. g. after screening, grit chamber, primary sedimentation or othertreatment to a receiving water or a retention basin;– design peak flow as remaining maximum flow after storm water discharge (l/s);– diurnal variation of the flow at a typical dry weather working day (l/s);– design loads as appropriate for the process in kg/h, kg/d, kg/week of COD, BOD5, KN, NH4-N, NO3-N, totalphosphorus, total suspended solids and organic suspended solids as well as the corresponding volume ofwastewater;– minimum daily and weekly ratios of COD/N and COD/P;– in case of seasonal flow and load fluctuations, day-to-day variation of flow (m3/d) and loads (kg/d) of the mainparameters over a year;– seasonal temperature of the wastewater over a year;– annual volume of wastewater (m3/a) a
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