상세 정보

underline
Metadata Downloads : dc(xml) or Excel
Cited 0 time in scopus ci

Title 

Functions of effective microorganisms in bioremediation of the contaminated harbor sediments

Authors 

K I EkpeghereByung Hyuk KimH S SonK S WhangHee-Sik KimS C Koh

Publisher 

Taylor & Francis

Issue Date 

2012

Citation 

Journal of Environmental Science and Health Part A, vol. 47, no. 1, pp. 44-53

Keywords 

bioaugmenationbioremediationEffective microorganisms (EM)marine sedimentmolassesorganic acidsreal-time quantitative PCR

Abstract 

The aim of this study was to apply loess balls containing effective microorganisms (EM) to the remediation of contaminated harbor sediments, and to thereby elucidate the functions of EM in remediation. Changes in physicochemical, biochemical, and microbiological parameters were measured to monitor the remediation process at a laboratory scale. Treatment with high concentrations of EM stock culture and EM loess balls (4%), and a low concentration of EM loess balls (0.1%) that contained molasses (0.05%) contributed to more rapid removal of malodor. Acetic acid, propionic acid, valeric acid, caponic acid, and lactic acid were rapidly removed in the presence of molasses (0.05% w/w) as a carbon nutrient source, indicating enhanced EM activity by amendment with molasses. Fermentation of molasses by EM showed that more acetic acid was produced compared with other organic acids, and that the majority of organic acids were eventually converted to acetate via intermediate metabolites. Sediment bioremediation tests showed there was no significant difference in eubacterial density with the control and the treatments. However, the density of a Lactobacillus sp. in sediments treated with 0.1% and 4.0% EM loess balls was significantly higher than the control, which indicated the bioaugmentation effect of EM loess balls in the polluted sediments. Treatment with EM loess balls and an appropriate amount of molasses, or other nutrients, will facilitate the remediation of polluted marine sediments by malodor removal, via EM degradation or utilization of offensive organic acids. To our knowledge, this is the first study to remediate contaminated marine (harbor) sediments using EM loess balls and to understand EM function during the bioaugmentation process, both in terms of organic acid metabolism and the dynamics of the engineered microbial community.

ISSN 

1093-4529

Link 

http://dx.doi.org/10.1080/10934529.2012.629578

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


There are no files associated with this item.
qrcode

FusionCharts.
DSpace Software Coptright(c) 2010 MIT and Hewleft-Packard  /  KRIBB-REPOSITORY ( Email:jakim@kribb.re.kr)