(619y) Experimental Investigation on Expanded Granular Sludge Bed Reactor to Maximize the Methane Gas Production in the Biogas

Al-Rubaye, H., Missouri Science and Technology

Experimental Investigation on Expanded Granular Sludge Bed Reactor to
Maximize the Methane Gas share in The Biogas Production

Haider Al-Rubaye, Joseph D. Smith, Ph.D.

Chemical & Biochemical Engineering Department,
Missouri University of Science and Technology, Rolla, USA


The increase in the global temperature, the
greenhouse gas emissions, air pollution and the instability in the fossil fuel
prices played an important role in making the world more aware  of
the renewable energy developments, By most definitions alternative energy(have
low carbon emissions, a distinction which separates it from renewable energy
which may or may not have significant environmental impact.

The Anaerobic Digestion Process, is one of the
most contributed renewable energy sources as it generates biogas that could be
used for heating and powering purposes, it could be used also in all equipment
designed for the natural gas with minimal adjustment to account for the lower
BTU content of the methane gas, upgrading
the biogas sometimes is preferred in order to increase the composition of the
methane gas in it. In general, the biogas
consists of methane gas about 50-70% and carbon dioxide 30-50%.

There are many ways to upgrade the biogas and
increase the methane share in it. One of the methods is a biochemical process,
which basically introduce the hydrogen
gas into the process in order to react with the carbon dioxide. In this way,
methane increases about 20-30% while the carbon dioxide would decrease about

The experiments would be conducted
in an expanded granular sludge bed reactor which  treats
the industrial and municipal waste water to generate biogas, sensitivity
analysis will be performed to maximize the composition of the methane in the
biogas. Moreover, the effect of the hydraulic retention time and the substrate
concentrations will also be investigated.