Updated on August 30, 2019


Created on August 28, 2017

Tiger Digester Tank

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The Tiger Digester Tank contains and decomposes waste.

Developed By Unknown
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Product Description

The Tiger digestor tank is a digester tank that stores and treats human waste by decomposing it using vermifiltration.

Distributors / Implementing Organizations

Tiger toilets, OxfamWater for people and PriMove

Manufacturing/Building Method


Intellectural Property Type

Open Source

User Provision Model

Users obtain Tiger Toilet tanks through direct sales or from NGOs.

Distributions to Date Status

1500 toilets in 50 Indian villages

Toilet type


Evacuation method


Storage conditions

Container storage

Capacity (L)


Time until emptying

~5 years

Design Specifications

The digester tank contains earthworms and other organisms that decompose the waste.

Technical Support

Technical support is performed by the user or the supplier of the product. Tiger Toilets provides a team for installation.

Replacement Components

Not applicable


Emptying needed every 5 years

Manufacturer Specified Performance Parameters

The manufacturer specifies performance targets related to limiting odor and flies, and ensuring that 85-90% of the waste in the digester is broken down daily.

Vetted Performance Status

Faecal coliform reduction of 99% was found through tests performed over 12 months in rural India. The influent and effluent samples were analyzed by an external accredited laboratory for thermotolerant coliforms and for total solids.


No direct safety concerns

Complementary Technical Systems

Toilet and superstructure

Academic Research and References

Compliance with regulations

Pathogen reduction and total solid reduction fulfills Indian Standards.

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