ISO - DIS 31800
Faecal sludge treatment units — Energy independent,prefabricated, community-scale, resource recovery units — Safety and performance requirements
|Publication Date:||10 July 2019|
|ICS Code (Liquid wastes. Sludge):||13.030.20|
This technical standard specifies requirements and test methods to ensure performance, safety, operability and maintainability of community-scale resource recovery faecal sludge treatment units (herein addressed as treatment units) that serve approximately, but not limited to, 1,000 to 100,000 people. This standard applies to treatment units that (a) primarily treat faecal sludge, (b) are able to operate in non-sewered and off-grid environments, and (c) are prefabricated. This standard does not apply to sanitation treatment units requiring major sewer infrastructure. Additionally, treatment units to which this standard applies exhibit resource recovery capability (e.g., recovering energy, reusable water, soil amendment) and are capable of being energy neutral or energy net positive.
This standard is intended to ensure the safety, performance, and sustainability of such treatment units. This standard also includes requirements for operability and maintainability to ensure safety and performance of the treatment unit.
Inputs are primarily faecal sludge derived from human excreta and may include additional inputs at the discretion of the manufacturer. This standard does not specify the characteristics of the faecal sludge (e.g. COD, BOD, moisture content, etc.) and which forms of the additional inputs (e.g. food waste) are treated within the unit; these inputs are defined by the manufacturer.
Inputs are illustrated as partially within and partially outside the standard's scope to illustrate that the manufacturer defines the input characteristics which meet the requirements set forth in this standard. The performance, safety, operability, and maintainability of the treatment unit are addressed in this standard, as are protecting human health and the environment, and safety aspects of the treatment unit's solid, liquid, and gaseous outputs. Noise and odour outputs of the treatment unit are also addressed within this standard.
Any resources produced and consumed internal to the process itself are outside the scope of the standard, as are the quality and value of any resource recovery and reuse products derived from treatment unit. Apart from the requirement for energy independence under manufacturer specified input conditions during steady-state operation, this standard does not set performance targets with respect to the amount or type of energy or resources that shall be recovered and/or locally used.
This standard excludes transportation and any intermediary processes required to supply the treatment unit with the defined inputs. Provisions of this standard apply to the treatment unit according to its unit boundaries, i.e. within the process chain beginning with its specified inputs and ending with its outputs.
Annex B (Informative) - Sustainability highlights some of the considerations on sustainability.