2012 International Conference on Environmental Quality Concern, Control and Conservation (EQC 2012)...
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2012 International Conference on Environmental Quality Concern, Control and Conservation (EQC 2012) The Treatment of Diesel Contaminated Soil By Food Waste
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 Chen Graduate Student of
the Department of Marine Environmental Engineering, National
Kaohsiung Marine University, Kaohsiung 81157, Taiwan. May 25-26,
2012 1
Slide 2
Introduction Experimental DesignExperimental MethodResults and
Discussion Conclusions Outline 2
Slide 3
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 its 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) 3
Slide 4
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) 4
Slide 5
About Food Waste Composting Processes to Treat Diesel
Contaminated Soil 5
Slide 6
100 Tons Field Scale Test (50 tons diesel contaminated soil :
50 tons food waste) 66
Slide 7
7 Turnover of the compost pile, indicating thermophilic
fermentation 7
Slide 8
Results of TPH Degradation It took only 7 days to meet the
treatment target, and indicated a very effective treatment method 8
National Control Limit 1,000 mg/kg Days 8
Slide 9
Treated Soils Fertility Study -- Corn Planting Experiment
9
F W Composting Treated Soil H 2 O 2 Treated Soil Treated by
adding hydrogen peroxide (H 2 O 2 ). 3,000 Initial diesel
concentration was 3,000 mg/kg. 30 It took more than 30 days to
complete the treatment. Two kind of treated soils were parallely
compared Treated food waste composting technology. 3,000 Initial
diesel concentration was 3,000 mg/kg. 7 It took only 7 days to
complete the treatment. 11
Slide 12
Here are the parallel comparison results Corn planting on day 0
H 2 O 2 treated soilsFW composting treated soil 12
Slide 13
On the 9th days Germination sparse Germination thriving H 2 O 2
treated soilsFW composting treated soil 13
Slide 14
On the 15 days Average height of 15 cm Average height of 20 cm
H 2 O 2 treated soilsFW composting treated soil 14
Slide 15
On the 32 days Average height of 53 cm Average height of 110 cm
H 2 O 2 treated soilsFW composting treated soil 15
Slide 16
On the 63 Days H 2 O 2 treated soilsFW composting treated soil
16
Slide 17
Time Series Growth Data FW Compost treated soil grows much
better than H 2 O 2 treated soil 17
Slide 18
Why FW composting treated soil grows better ? Root system badly
developed Root system well developed H 2 O 2 treated soilsFW
composting treated soil 18
Slide 19
A better view for comparison 19
Slide 20
Soil Fertility Comparison ItemH 2 O 2 treated soil FW
composting treated soil Ideal soil fertility References pH8.77.4
5.5~7.5 Taichung District Agricultural Research and Extension
Station EC0.20.8 0.5~1.2 mS/m Ash (%)9079 - - C/N19 17 20 Compost
Standard Germination % 7095 80% 20
Slide 21
Harvest per unit area 21
Slide 22
22
Slide 23
23
Slide 24
The following product inspections demonstrate the corns are
safe to eat. Corn - Toxic heavy metal Corn - Pesticide residues
Corn - Other semi-VOC Soil - TPH analysis Soil - PAH analysis All
the analyses were performed by the SGS International Accreditation
Laboratory 24
Slide 25
25 Meet the fruits and vegetables regulations, cadmium limits:
0.05 ppm; lead: 0.1 ppm
Slide 26
Conclusions 26
Slide 27
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. 27
Slide 28
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. 28