Performance comparison of a pilot-scale UASB and DHS system and activated sludge process for the treatment of municipal wastewater

Madan Tandukar, A. Ohashi, H. Harada

Research output: Contribution to journalArticlepeer-review

112 Citations (Scopus)

Abstract

This study compares the performance of a pilot-scale combination of UASB and DHS system to that of activated sludge process (ASP) for the treatment of municipal sewage. Both systems were operated in parallel with the same sewage as influent. The study was conducted for more than 300 days, which revealed that organic removal efficiency of UASB + DHS system was comparable to that of ASP. Unfiltered BOD removal by both systems was more than 90%. However, UASB + DHS system outperformed ASP for pathogen removal. In addition, volume of excess sludge production from UASB + DHS was 15 times smaller than that from ASP. Moreover, unlike ASP, there is no requirement of aeration for the operation of UASB + DHS system, which makes it an economical treatment system. Considering the above observations, it was concluded that UASB + DHS system can be a cost-effective and viable option for the treatment of municipal sewage over ASP, especially for low-income countries.

Original languageEnglish
Pages (from-to)2697-2705
Number of pages9
JournalWater Research
Volume41
Issue number12
DOIs
Publication statusPublished - 2007 Jun

Keywords

  • Activated sludge process
  • DHS
  • Low cost
  • Municipal sewage
  • UASB

ASJC Scopus subject areas

  • Ecological Modelling
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution

Fingerprint Dive into the research topics of 'Performance comparison of a pilot-scale UASB and DHS system and activated sludge process for the treatment of municipal wastewater'. Together they form a unique fingerprint.

Cite this