Modification of DHS Bioreactor Module with Oil Palm Fiber Material for Treating Domestic Wastewater

Abstract

An oil palm fiber module has been developed to modify a down-flow hanging sponge (DHS) reactor module. The objective of the proposed system is to improve two existing DHS variants of post-treatment unit for UASB treating domestic wastewater, i.e. cube-type and curtain-type sponge as domestic wastewater treatment system for developing countries. This paper describes the potential of oil palm fiber-based DHS (PF-DHS) configuration for sewage treatment. Feasibility of the PF-DHS reactor was evaluated by conducting a six-month continuous operation using actual sewage as feed. The system has been verified to have an excellent organic removal performance achieving 67% of unfiltered COD removal, and nearly perfect SS removal at the HRT of 2 h. It was observed that the organic removal rate was approximately 2.64 kg COD/m 3 per day. The result recommended that the proposed PF-DHS reactor would be a promising system to alter sponge-based DHS for domestic wastewater treatment system in developing countries.

Dissolved methane oxidation and competition for oxygen in down-flow hanging sponge reactor for post-treatment of anaerobic wastewater treatment

“…We have been developing a biological dissolved methane oxidation system using the single closed DHS reactor , which revealed that methane oxidation occurred preferentially over ammonium oxidation in the reactor; however, the interactions of methane oxidation with sulfide and organic carbon oxidation remain to be investigated. The DHS reactor has been developing as a low cost post-treatment for the anaerobic treatment process and applied to several types of wastewaters (Machdar and Faisal, 2011;Takahashi et al, 2011;Tandukar et al, 2007); thus, it is a promising method for removing dissolved methane as well as polish up the anaerobically treated effluent.…”

Use of G3-DHS Bioreactor for Secondary Treatment of Septic Tank Desludging Wastewater

“…The principal objective of this research is to evaluate the performance of the thirdgeneration of downflow hanging sponge (G3-DHS) bioreactor for treatment of desludging wastewater from IPTL. DHS bioreactor was originally published in 1997 by Machdar et al [5] and has been explored for extensive time by numerous researchers [6], [7], [8], [9], [10], [11], [12] for treatment of domestic wastewater.…”