Mycoremediation Performance of Pleurotus ostreatus on Mercury- Contaminated Soil using Rice Straw and Sawdust as Substrate
Mycoremediation is an alternative method to remediate mercurycontaminated soil. Pleurotus ostreatus (oyster mushroom) is a suitable agent due to its ability to accumulate high concentration of mercury. Mercury has deleterious effects on P. ostreatus’ ability to utilize substrate, therefore substr...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/42796 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Mycoremediation is an alternative method to remediate mercurycontaminated
soil. Pleurotus ostreatus (oyster mushroom) is a suitable agent due
to its ability to accumulate high concentration of mercury. Mercury has
deleterious effects on P. ostreatus’ ability to utilize substrate, therefore substrate
formulation becomes a primary concern. This research aimed to evaluate growth
and mycoremediation performance of P. ostreatus on mercury-contaminated soil.
Substrate compositions of whole rice straw (100%), whole sawdust (100%) and
equal mix of both (50:50) were used to cultivate P. ostreatus. Growth performance
was analyzed based on rate of substrate colonization, total duration of growth
and biomass productivity; while mycoremediation performance analysis was
based on soil toxicity level, mercury bioaccumulation and removal. Highest
colonization rate was observed in mixed substrate (6,9 mm/day) compared to
sawdust (6,2 mm/day) and rice straw (6,0 mm/day). Mixed substrate also required
shorter growth time (39,8 days) compared to sawdust (44,9 days) and rice straw
(60,7 days). On the other hand, cultivation on rice straw produced highest dry
weight than mixed substrate and sawdust, with values of 8,4 g, 5,1 g, and 3,3 g
respectively. Mycoremediation on mixed substrate resulted in highest mercury
accumulation of 123,60 ?g compared to sawdust (89,89 ?g) and rice straw (82,00
?g). Observations on mercury removal and soil toxicity indicated similar data
trend. Highest merucry removal was achieved on mixed substrate (59,1%)
compared to sawdust (46,9%) and rice straw (48,6%). Highest decrease in soil
toxicity level was also observed on mixed substrate (26,9%) compared to sawdust
(25,0%) and rice straw (22,2%). It was concluded that mixed substrate produced
highest growth rate and mycoremediation performance of P. ostreatus compared
to other substrate compositions.
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