Comparison Of Centralized, Semi-centralized
And Decentralized Sanitation Systems
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[main]
Author(s)
I. Obermann & K. Sattler
Abstract
This study assists in identifying suitable and sustainable sanitation systems under
specific local conditions.
In order to fulfil this objective, two different assessments were conducted.
Six selected decentralized, semi-centralized and centralized sanitation
systems were assessed against five sustainability key groups and their subcriteria.
Afterwards, the suitability of the sanitation systems under six defined local
scenarios was evaluated. An overview about advantages and disadvantages of the
six sewage systems and their field of application was given.
The developed system was exemplarily applied to the city of Shillong (India)
resulting in the step by step implementation of different measures.
Since the implementation of a large central sewage system requires long time
periods, dividing the implementation process into various phases with interim
stages is suitable in order to take early action on increasing the quality of surface
waters and public health. This is done to mitigate health risks for the population
while mid- and long-term measures are performed. The combination of different
measures is inevitable.
Keywords: decentralized, semi-centralized, centralized sanitation, constructed
wetlands, household septic tank, waste water treatment plant, assessment.
Keywords
decentralized, semi-centralized, centralized sanitation, constructed
wetlands, household septic tank, waste water treatment plant, assessment
