2012 International Conference on Environmental Quality Concern, Control and Conservation (EQC
2012)
The Treatment of Diesel Contaminated Soil By Food Waste Composting, and the Feasibility of
Continued Re-Farming on Its Treated Soil
Chung-Shiau Ho*,Wen-Yen Huang, Wen-Ling Hong, Chitsan Lin, Po-Han ChenGraduate Student of the Department of Marine Environmental
Engineering, National Kaohsiung Marine University, Kaohsiung 81157, Taiwan.
May 25-26, 2012
1
Introduction
Experimental Design
Experimental Method
Results and Discussion
Conclusions
Outline
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Petroleum Fuel as the key support of modern industry plays a core role in the development of global economy.
But the complex of the petroleum refine processes, and it’s huge demand often result in oil spills.
According to the Soil and Groundwater Pollution Remediation Web Pages of Taiwan EPA, there are 51 documented oil-related remediation sites in Taiwan.
Introduction (1/2)
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Therefore, there is a strong need to develop an environmental sound technology to treat mineral oil contaminations.
In this study, we were exploring to apply the food waste composting technology on the remediation of diesel contaminated soil, hoping to develop a cost effective and feasible green technology.
Finally, the feasibility of continued re-farming on the treated soil was evaluated.
Introduction (2/2)
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About Food Waste Composting Processes to Treat Diesel
Contaminated Soil
5
100 Tons Field Scale Test(50 tons diesel contaminated soil : 50 tons food waste)
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7
Turnover of the compost pile, indicating thermophilic fermentation
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Results of TPH DegradationIt took only 7 days to meet the treatment target
, and indicated a very effective treatment method
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0
200
400
600
800
1000
1200
1400
1600
1800
0 7 14 21 28 35 42 49 56 63
TPH
(mg/
kg d
ry w
t)
天數(Days)
National Control Limit 1,000 mg/kg
Days8
Treated Soils Fertility Study-- Corn Planting Experiment
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Treated soils Site preparation Corn planting
Harvest Corn growth Corn germination10
F W Composting Treated SoilH2O2 Treated Soil
Treated by adding hydrogen
peroxide (H2O2).
Initial diesel concentration
was 3,000 mg/kg.
It took more than 30 days to
complete the treatment.
Two kind of treated soils were parallely compared
Treated food waste composting
technology.
Initial diesel concentration was
3,000 mg/kg.
It took only 7 days to complete
the treatment.
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Here are the parallel comparison results
Corn planting on day 0
H2O2 treated soils FW composting treated soil
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On the 9th days
Germination sparse Germination thriving
H2O2 treated soils FW composting treated soil
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On the 15 days
Average height of 15 cm Average height of 20 cm
H2O2 treated soils FW composting treated soil
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On the 32 days
Average height of 53 cm Average height of 110 cm
H2O2 treated soils FW composting treated soil
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On the 63 Days
H2O2 treated soils FW composting treated soil
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0 1 2 3 4 5 6 7 8 90
30
60
90
120
150
180
210
240
1 1317
2744
6280
115 120 128
5 1636
77100
130
162185 190 191
Chemical remediationComposting remediation
Days( week)
Ave
rage
H
eigh
t(cm)
Time Series Growth DataFW Compost treated soil grows much better than H2O2 treated soil
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Why FW composting treated soil grows better ?
Root system badly developed Root system well developed
H2O2 treated soils FW composting treated soil
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A better view for comparison
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Soil Fertility Comparison
Item H2O2 treated soil FW composting treated soil
Ideal soil fertility References
pH 8.7 7.4 5.5~7.5 Taichung District Agricultural Research and Extension StationEC 0.2 0.8 0.5~1.2
mS/m
Ash (%) 90 79 - -
C/N 19 17 20以下Compost Standard
Germination % 70 95 80%以上
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Harvest per unit area
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The following product inspections demonstrate the corns are safe to eat.
Corn - Toxic heavy metal Corn - Pesticide residues Corn - Other semi-VOC Soil - TPH analysisSoil - PAH analysis
All the analyses were performed by the SGS International Accreditation Laboratory
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Meet the fruits and vegetables regulations, cadmium limits: 0.05 ppm; lead: 0.1 ppm
五
Conclusions
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In this study, we were able to treat the 3,000 mg/kg
diesel contaminated soil to 801 mg/kg that comply with
the regulatory limit of 1,000 mg/kg in soil. And it took
only 7 days.
The treated soil was examined with TPH and PAHs. Results
indicate the treated soil is safe to backfill and to reuse.
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Therefore, we suggest that the Food Waste Composting
process as a green remediation alternative to treat the
diesel contaminated soil.
Owing to the better fertility of the treated soil, our parallel corn
growing test had demonstrated that the FW composting treated
soil had out-grow the traditional chemical oxidation treated soil.
And the harvest corn products were safe to eat, as it meets the
Safe Organic Fruits and Vegetables Standard.
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Thanks for your attention
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