Study on performance of a modified anaerobic baffled reactor to treat high strength wastewater

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The main problem associated with the treatment of high strength materials in an Anaerobic Baffled Reactor (ABR) is difficult breakdown of fat, protein and hydrocarbon molecules at early stage of anaerobic decomposition due to uncertain selection of HydraulicRetention Time (HRT) and therefore organic loading rate (OLR). Thus, in this study a modified four-compartment ABR with a working volume of 50 L was designed to determine the treatment efficiency and methane production rate of high strength wastewater. The first compartment in the ABR was doubled in size to provide longer solid retention time. Based on C/N ratio of 30, a mixture of 62% kitchen waste and 38% sewage sludge was used as substrate and fed to the reactor continuously. Initially the characteristics of kitchen waste were measured and the amounts of fat, protein cellulose, hemicellulose and lignin were found in proper level for anaerobic decomposition. Next the effects of different HRT and OLR were evaluated in the reactor. COD reduction and biogas production were investigated at different HRT (5, 4, 3 and 2 days) and OLR (2, 3, 4, 5 and 6 kg/m3d). Results show that the highest COD removals (74.5 and 75.4%) were observed at 3 days HRT and OLR of 2 kg/m-3day, respectively. While the best production of biogas (7.40 and 9.10 L day-1) was observed at 5 days HRT and OLR of 6 kg/m3 day, respectively.

Original languageEnglish
Pages (from-to)1449-1452
Number of pages4
JournalJournal of Applied Sciences
Volume11
Issue number7
DOIs
Publication statusPublished - 2011

Fingerprint

wastewater
biogas
fat
decomposition
protein
lignin
rate
reactor
cellulose
methane
hydrocarbon
substrate

Keywords

  • High strength wastewater treatment
  • Hydraulic retention time
  • Organic loading rate

ASJC Scopus subject areas

  • General

Cite this

Study on performance of a modified anaerobic baffled reactor to treat high strength wastewater. / Malakahmad, A.; Ahmad Basri, Noor Ezlin; Md Zain, Shahrom.

In: Journal of Applied Sciences, Vol. 11, No. 7, 2011, p. 1449-1452.

Research output: Contribution to journalArticle

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