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'''When urine or faeces cannot be used immediately or transported using a Conveyance Technology (i.e. Jerrycans or oil drums) it can be stored onsite in containers or tanks. The Storage Tank must then be moved or emptied into another container for transport. '''
===Urine===The Storage Tank should be appropriately sized to accommodate the number of users and the time required to sanitise the urine. Urine collected in small containers (up to 20 litres) can be easily transported and used as fertiliser in the household's own vegetable garden. Larger containers, filled with urine have to be collected by a vehicle and can therefore be transported over longer distances. The storage guidelines for urine correspond to the temperature of storage and the intended crop, but all urine should be stored for at least 1 month (see WHO guidelines for specific storage and application guidelines). Smaller volume Storage Tanks can be used and transported to another, centralized Storage Tank at, or close to, the point of use (i.e. the farm).
Mobile Storage Tanks should be plastic or fibreglass, but permanent Storage Tanks can be made of concrete or plastic. Metal should be avoided as it can be easily corroded by the high pH of stored urine.
To minimize odours, the tank should be filled from the bottom, i.e. the urine should flow down through a pipe and be released near the bottom of the tank; this will prevent the urine from spraying as well as prevent back-flow.
===Faeces===
Oil drums, or half drums, can be placed directly beneath a toilet to collect faeces. Ash or other drying material has to be added regularly to prevent smells. Toilet paper can also be collected in the oil drum.
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==Adequacy==
Containers are not suitable for the collection of mixed urine and excreta.
Collection of oil drums and containers at community level has to be made functioning beforehand and measures have to be taken to guarantee hygienic safety. Sizes and weights must be manageable.
Long-term storage is the best way to sanitize urine without the addition of chemicals or mechanical processes.
== Manual - How to build ==
== External links ==* General information about Oil drums and containers [http://www.gtz.de/ecosan www.gtz.de/ecosan ] [http://www.waste.nl www.waste.nl ]* The Philippines [http://www.caps.ph www.caps.ph ]* India [http://www.sulabhinternational.org www.sulabhinternational.org ] ==References and external links==
* Elizabeth Tilley et.al (2008). [http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/publications_sesp/downloads_sesp/compendium_high.pdf Compendium of Sanitation Systems and Technologies] ([http://www.eawag.ch/organisation/abteilungen/sandec/publikationen/publications_sesp/downloads_sesp/compendium_low.pdf low res version]). Department of Water and Sanitation in Development Countries ([http://www.sandec.ch/ Sandec]) at the Swiss Federal Institute of Aquatic Science and Technology (Eawag). (Provides a full overview of sanitation systems.)