This manual on Primary, Secondary and Tertiary Treatment sets out the general principles and practices which should be followed by those involved in the treatment of urban waste water. It provides criteria and procedures for the proper management, maintenance, supervision, operation and use of the processes and equipment required for the secondary treatment of wastewater
EPA (1997): Wastewater Treatment Manuals – Primary, Secondary and Tertiary Treatment. Wexford: Environmental Protection Agency (EPA) URL [Accessed: 28.08.2014]