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<!-- table at top of page with logo, picture, Application level, Management level, and input-output tables -->
{|width="100%"|style="width:50%;"|{santable{santable_new|
sys1=[[Waterless System with Alternating Pits|2]] |
sys2=|
|spanish_link=Fossa_Alterna_sp
}}
|[[Image:Fossa_alterna.png |right|300px]]|}
[[Image:Icon_fossa_alterna.png |right|95px]]
'''The Fossa Alterna is an alternating, waterless (dry) double pit technology. Compared to the [[Double Ventilated Improved Pit|Double VIP]] which is just designed to collect, store and partially treat excreta, the Fossa Alterna is designed to make [[Sanitation Products#Compost - EcoHumus|EcoHumus]]. The Fossa Alterna is dug to a maximum depth of 1.5 m and requires a constant input of soil.'''