Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2748

Full Length Research Paper

Role of hydrogen peroxide (H2O2) enhanced anaerobic co-digestion of petrochemical wastewater on cycle time minimization during biomethanation

    Md. Nurul Islam Siddique1, Mimi Sakinah Abd. Munaim2 and A. W. Zularisam1*
    1Faculty of Civil Engineering and Earth Resources, University Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia. 2Faculty of Chemical and Natural Resources Engineering, University Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300 Gambang, Kuantan, Pahang, Malaysia.  
Email: [email protected]

  •  Accepted: 07 May 2013
  •  Published: 30 June 2013

Abstract

 

 

The latent of per-oxidation pretreatment to petrochemical waste water (PWW) prior to anaerobic co-digestion process was explored in continuous stirred tank reactor (CSTR) continually with dairy cattle and beef cattle manure. Oxidation by hydrogen peroxide (OHP), elevated biodegradability index (BOD/COD) up to 35%. While CSTR operated with non-OHP PWW, system was found to be failed at organic loading of 6.5 to 12.99 kg COD/m3/day due to vigorous volatile fatty acid accumulation. Inversely, the OHP PWW rendered sustainable superior TCOD removal at 6.03 to 11.7 kg COD/m3/day organic loading with durable process stability at co-digestion period. As methane production is considered to be inhibited due to volatile fatty acid (VFA) accumulation leading to instability of reactor operation during anaerobic digestion, the co-digestion of OHP pretreated PWW resulted in exaggerated methane yield, followed by 98 ± 0.5%, 95 ± 0.05% and 79 ± 0.06% COD reduction at 9, 6 and 4 days HRT. The concrete data revealed that prolonged HRT and abridged cycle time (CT) caused CSTR aggrandized TCOD removal efficiency and methane yield.

 

Key words:  Anaerobic degradation (AD), petrochemical waste water (PWW), hydraulic retention time (HRT), cycle time (CT), oxidation by hydrogen peroxide (OHP), methane yield.