Comparison of Biostimulation and Bioaugmentation Techniques for the Remediation of Used Motor Oil Contaminated Soil

Ano: 2009 | Volume: 52 | Número: 3

Autores: Surajudeen Abdulsalam, Adaji Benjamin Omale

Palavras-chave: bioremediation, biostimulation, bioaugmentation, tph, used motor oil, wooden microcosms

Resumo Português:

O presente estudo trata da biorremediação usandose
solo contaminado artificialmente com óleo de
motor a um nível de poluente de 40.000 ppm
usando técnicas de remediação por bioestimulação
e por bioagumentação durante 42 dias. Quatro
opções de tratamento foram investigadas no
microcosmo de madeira: Controle (T1), água
alterada (T2), bioestimulação (T3) e híbrido de
bioestimulação e bioaugmentação (T4). A eficácia
dos processos de biorremediação foram
monitoradas usando a remoção de hidrocarbonetos
totais petróleo (TPH) e contagem bacteriana total
(TBC). T3 teve a maior taxa de remoção de TPH
(69,2 ± 0,05%), seguido por T4 (65,2 ± 0,25%) e
T2 (58,4 ± 0,5%); o controle (T1) apresentou a
menor taxa de remoção de TPH (43,2 ± 1,5%).
TBC revelou que a biorremediação efectivamente
ocorreu; T4 teve o maior crescimento de bactérias
9,6E+07CFU/g, seguido pelo T3 (7.2E+07CFU/g),
T2 (1.7E+05CFU/g) e T1 (1.65E+05CFU/g).
Além disso, T3 apresentou a maior taxa de
remoção metal (2,172%) e T4 teve a mais baixa
taxa de remoção metal (0,203%).

Resumo Inglês:

This study was carried out on the bioremediation of used motor oil contaminated soil artificially contaminated to a
pollutant level of 40,000ppm using biostimulation and bioaugmentation remediation techniques for 42 days. Four
treatment options were investigated in wooden microcosms: Control (T1), water amended (T2), biostimulation (T3)
and hybrid of biostimulation and bioaugmentation (T4). The effectiveness of bioremediation processes were
monitored using the total petroleum hydrocarbon removal (TPH) and total bacterial count (TBC). T3 had the
highest TPH removal rate (69.2±0.05%), followed by T4 (65.2±0.25%) and T2 (58.4±0.5%); the control (T1) had
the lowest TPH removal rate (43.2±1.5%). TBC revealed that bioremediation actually took place; T4 had the
highest maximum bacterial growth of 9.6E+07CFU/g, followed by T3 (7.2E+07CFU/g), T2 (1.7E+05CFU/g) and
T1 (1.65E+05CFU/g). In addition, T3 had the highest metal removal rate (2.172%) and T4 had the lowest metal
removal rate (0.203%).