Effect of Groundwater Velocity on Pilot Scale Bioremediation of Gasoline Contaminated Sandy Aquifers

Journal

Water, Air, & Soil Pollution

Publisher

Springer Netherlands

ISSN

0049-6979 (Print) 1573-2932 (Online)

Subject

Biomedical and Life Sciences and Earth and Environmental Science

Issue

Volume 120, Numbers 3-4 / June, 2000

DOI

10.1023/A:1005203702132

Pages

315-329

Online Date

Monday, November 29, 2004

Effect of Groundwater Velocity on Pilot Scale Bioremediation of Gasoline Contaminated Sandy Aquifers

Niaz MohammedContact Information and Rashid I. Allayla1

(1) 

Center for Environment and Water, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia

 

Abstract  The effect of groundwater velocity onbioremediation of gasoline contaminated sandy soil has been investigated using a pilot scale sand tank model. The effect of hydrogen peroxide and contaminant concentration are also included. A factorial experiment has been conducted to study three factors, groundwater velocity, inlet BTX concentration and hydrogen peroxide dose. Observed concentration data collected from the sand tank model have been used for estimating the transport parameters. Three differentbiodegrdation kinetics, namely first-order/zero-order, Monod and Michaelis Menten (a modification of Monodkinetics considering no microbial growth) kinetics have been used to model the biodegradation. The data have been found to fit all three models with acceptable coefficient of regression. Groundwater velocity has been found to be the most significant factor governing the biodegradation rate constants(determined from the first-order rate constant) of BTX compounds. Hydrogen peroxide dose and BTX concentration have also been found to be significant factors.

biodegradation kinetics - bioremediation - BTX  factors affecting bioremediation - groundwater velocity - Monod kinetics