• There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

BS EN 12255-13:2002

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Wastewater treatment plants Chemical treatment. Treatment of wastewater by precipitation/flocculation
Available format(s)

Hardcopy , PDF

Superseded date

31-07-2023

Language(s)

English

Published date

24-07-2003

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
  4.1 General
  4.2 Chemical background and process options
       4.2.1 Chemical process
       4.2.2 Precipitation processes
       4.2.3 Selection of precipitation chemicals
  4.3 Storage of chemicals
       4.3.1 General
       4.3.2 Aluminum salts
       4.3.3 Iron salts
       4.3.4 Calcium salts
  4.4 Dosing equipment
       4.4.1 General
       4.4.2 Aluminium salts
       4.4.3 Iron salts
       4.4.4 Calcium salts
  4.5 Silos and tanks
  4.6 Mixing systems
  4.7 Flocculators
  4.8 Sedimentation tanks
       4.8.1 General
       4.8.2 Design considerations
       4.8.3 Chemical sludge wasting
  4.9 Flotation
  4.10 Physical filtration
  4.11 Sludge
       4.11.1 Sludge production
       4.11.2 Sludge characteristics
Annex A (normative) Precipitation chemicals
        A.1 Aluminium salts
        A.2 Iron salts
             A.2.1 Ferrous salts
             A.2.2 Ferrous sulphate, monohydrate
             A.2.3 Ferrous sulphate, heptahydrate
             A.2.4 Ferric salts
        A.3 Calcium salts
             A.3.1 General
             A.3.2 Calcium oxide
             A.3.3 Calcium hydroxide
Bibliography

Provides the requirements for chemical treatment of wastewater by precipitation/flocculation for removal of phosphorus and suspended solids.

This European Standard gives the application, procedure and specifies the requirements for chemical treatment of wastewater for removal of phosphorous and suspended solids. Differences in wastewaste treatment throughout Europe have led to a variety of practices being developed. This Standard gives fundamental informations about the practices; this Standard has not attempted to specify all available practices.

Committee
B/505
DevelopmentNote
Supersedes 00/102589 DC (08/2003)
DocumentType
Standard
Pages
18
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

EN 12255-10:2000 Wastewater treatment plants - Part 10: Safety principles
EN 12255-6:2002 Wastewater treatment plants - Part 6: Activated sludge process
EN 12255-8:2001 Wastewater treatment plants - Part 8: Sludge treatment and storage
EN 12518:2014 CHEMICALS USED FOR TREATMENT OF WATER INTENDED FOR HUMAN CONSUMPTION - HIGH-CALCIUM LIME
EN 752-6 : 1998 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PUMPING INSTALLATIONS
EN 12255-11:2001 Wastewater treatment plants - Part 11: General data required
EN 10088-2:2014 STAINLESS STEELS - PART 2: TECHNICAL DELIVERY CONDITIONS FOR SHEET/PLATE AND STRIP OF CORROSION RESISTING STEELS FOR GENERAL PURPOSES
EN 12255-1:2002 Wastewater treatment plants - Part 1: General construction principles
EN 1085:2007 Wastewater treatment - Vocabulary

View more information
£134.00
Excluding VAT

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.