Enhancement of organic matter degradation and methane gas production of anaerobic granular sludge by degasification of dissolved hydrogen gas.

Abstract:

:A hollow fiber degassing membrane (DM) was applied to enhance organic matter degradation and methane gas production of anaerobic granular sludge process by reducing the dissolved hydrogen gas (D-H2) concentration in the liquid phase. DM was installed in the bench-scale anaerobic granular sludge reactors and D-H2 was removed through DM using a vacuum pump. Degasification improved the organic matter degradation efficiency to 79% while the efficiency was 62% without degasification at 12,000mgL-1 of the influent T-COD concentration. Measurement of D-H2 concentrations in the liquid phase confirmed that D-H2 was removed by degasification. Furthermore, the effect of acetate concentrations on the organic matter degradation efficiency was investigated. At acetate concentrations above 3gL-1, organic matter degradation deteriorated. Degasification enhanced the propionate and acetate degradation. These results suggest that degasification reduced D-H2 concentration and volatile fatty acids concentrations, prevented pH drop, and subsequent enhanced organic matter degradation.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Satoh H,Bandara WMKRTW,Sasakawa M,Nakahara Y,Takahashi M,Okabe S

doi

10.1016/j.biortech.2017.08.035

subject

Has Abstract

pub_date

2017-11-01 00:00:00

pages

768-775

issue

Pt 1

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(17)31340-8

journal_volume

244

pub_type

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