A review on energy and cost effective phase separated pretreatment of biosolids

J. Rajesh Banu, T. Poornima Devi, R. Yukesh Kannah, S. Kavitha, Sang Hyoun Kim, Raul Muñoz, Gopalakrishnan Kumar

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Extracellular Polymeric Substances (EPS) existent in anaerobic sludge proves to be a barrier for sludge liquefaction and biomass lysis efficiency. Hence EPS deaggregation heightens the surface area for the subsequent pretreatment thereby uplifting the sludge disintegration and biomethanation rate. This review documents the role of EPS and its components which inhibits sludge hydrolysis and also the various phase separated pretreatment methods available with its disintegration mechanism to enhance the biomass lysis and methane production rate. It also illustrates the effects of phase separated pretreatment on the sludge disintegration rate which embodies two phases-floc disruption and cell lysis accompanied by their computation through biomethane potential assay and fermentation analysis comprehensively. Additionally, energy balance study and cost analysis requisite for successful implementation of a proposed phase separated pretreatment on a pilot scale level and their challenges are also reviewed. Overall this paper documents the potency of phase separated pretreatment for full scale approach.

Original languageEnglish
Article number117169
JournalWater Research
Publication statusPublished - 2021 Jun 15

Bibliographical note

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Civil and Structural Engineering
  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution


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