PhD Defence Joy Riungu

  • 28 Jan 2021
  • 15:00 - 17:00
Western Europe

On Thursday 28 January 2021, 15.00 hrs. the PhD Defence and Awarding Ceremony of Ms. Joy Nyawira Riungu from Kenia, will take place. Professor Jules van Lier is her promotor and Dr. Mariska Ronteltap her co-promotor.

The title of his thesis is

Off-Site Enhanced Biogas Production with Concomitant Pathogen Removal from Faecal Matter

Due to the covid-19 pandemic the defence will be organised hybrid digital and will not be open to the public.

Audience live stream link will be announced later.

Research summary

Globally, 2.7 billion people are using onsite sanitation systems, particularly in low income, high density settlements (LIHDS) in urban areas of developing countries. However, treatment technologies to manage the faecal sludge (FS) generated from these systems are often not in place, leading to high risks for environmental and public health. The development of replicable and effective technologies for FS treatment is key in addressing this challenge.

This research focused on development of an innovative FS stabilisation technology and addressed key constraints in anaerobic FS treatment: inadequate pathogen inactivation and limitations in biochemical energy recovery. The developed two-stage reactor system consists of an acidogenic reactor fed with mixtures of FS and market waste to facilitate pathogen inactivation, and a subsequent methanogenic plug-flow reactor for enhanced methane production. Due to its potential for application as an off-site FS treatment technology at any scale, receiving any type of faecal matter, collected from different types of sanitary systems, the system provides an option for FS stabilisation for LIHDS. Additionally, the research evaluated the limitations of sanitation provision in LIHDS, and proposes methods for creating an enabling environment for full-scale implementation of onsite systems. The presented results contribute to designing appropriate sanitation interventions in LIHDS


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