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VOCs emitted from the two cakes are shown in Table 1, while the measured concentrations emitted throughout storage for different classes of VOCs are shown in Figure 1.
Table 1

VOCs emitted and identified throughout the storage experiment

Acid Acetic acid 
Benzoic acid 
Alcohol Ethanol 
Aldehyde Benzaldehyde 
Alkane Decane 
Dodecane 
Heptane, 2,2,4,6,6-pentamethyl- 
Nonane 
Octane 
Tetradecane 
Total dimethyl heptane 
Total methyl decane 
Total methyl heptane 
Total methyl nonane 
Total methyl octane 
Tridecane 
Undecane 
Alkyne Pentadecyne 
Aromatic Acetaldehyde 
Benzene, 1,2,3-trimethyl- 
Benzene, 1,2,4-trimethyl- 
Benzene, 1,3,5-trimethyl- 
Benzonitrile 
Ethylbenzene 
p-Xylene 
o-Xylene 
m-Xylene 
Toluene 
Total cymene (methyl(methylethyl)-benzene) 
Total ethyl dimethyl benzene 
Total ethyl methyl benzene 
Bicyclic alkane Bicyclo[2.2.2]octane, 2-methyl- 
Bicyclo[3.1.1]heptane, 2,6,6-trimethyl- 
Bicyclo[4.1.0]heptane, methyl pentyl 
Total decalin, methyl 
Naphthalene, decahydro- 
Spiro[4.5]decane 
Total dimethyl decahydro naphthalene 
Total dimethylspiro[4.5]decane 
Total dimethylspiro[5.5]undecane 
Total ethyl decalin 
Total methyl decahydro-naphthalene 
Cyclic alkane 1-Methyl-2-methylenecyclohexane 
Cyclohexane, pentyl- 
Cyclohexane, propyl- 
Cyclohexanone, ethenyl (methyl ethyl) 
Ketone, 2,2-dimethylcyclohexyl methyl 
Total cyclohexane, methyl-(methylethylidene) 
Total dimethyl cyclohexene 
Total ethyl methylcyclohexane 
Cyclohexane, ethyl- 
Cyclododecanemethanol 
Cyclic alkene Cyclopentene, octyl 
Methyl cyclodecene 
Halogenated Tetrachloroethylene 
Total dichloro benzene 
Trichloroethylene 
Ketone 2-Butanone 
Acetone 
Methyl isobutyl ketone 
p-Benzoquinone 
Total pentanone 
Nitrogenous TMA 
Sulfur compound Carbon disulfide 
Dimethyl sulfide 
DMTS 
Disulfide, dimethyl 
Ethane, (methylthio)- 
Propane, 1-(methylthio)- 
Terpene Caryophyllene 
Total α-pinene 
Total β-citronellene 
Total β-pinene 
Total carene 
Total γ-terpinene 
Total limonene 
Total menthene 
Acid Acetic acid 
Benzoic acid 
Alcohol Ethanol 
Aldehyde Benzaldehyde 
Alkane Decane 
Dodecane 
Heptane, 2,2,4,6,6-pentamethyl- 
Nonane 
Octane 
Tetradecane 
Total dimethyl heptane 
Total methyl decane 
Total methyl heptane 
Total methyl nonane 
Total methyl octane 
Tridecane 
Undecane 
Alkyne Pentadecyne 
Aromatic Acetaldehyde 
Benzene, 1,2,3-trimethyl- 
Benzene, 1,2,4-trimethyl- 
Benzene, 1,3,5-trimethyl- 
Benzonitrile 
Ethylbenzene 
p-Xylene 
o-Xylene 
m-Xylene 
Toluene 
Total cymene (methyl(methylethyl)-benzene) 
Total ethyl dimethyl benzene 
Total ethyl methyl benzene 
Bicyclic alkane Bicyclo[2.2.2]octane, 2-methyl- 
Bicyclo[3.1.1]heptane, 2,6,6-trimethyl- 
Bicyclo[4.1.0]heptane, methyl pentyl 
Total decalin, methyl 
Naphthalene, decahydro- 
Spiro[4.5]decane 
Total dimethyl decahydro naphthalene 
Total dimethylspiro[4.5]decane 
Total dimethylspiro[5.5]undecane 
Total ethyl decalin 
Total methyl decahydro-naphthalene 
Cyclic alkane 1-Methyl-2-methylenecyclohexane 
Cyclohexane, pentyl- 
Cyclohexane, propyl- 
Cyclohexanone, ethenyl (methyl ethyl) 
Ketone, 2,2-dimethylcyclohexyl methyl 
Total cyclohexane, methyl-(methylethylidene) 
Total dimethyl cyclohexene 
Total ethyl methylcyclohexane 
Cyclohexane, ethyl- 
Cyclododecanemethanol 
Cyclic alkene Cyclopentene, octyl 
Methyl cyclodecene 
Halogenated Tetrachloroethylene 
Total dichloro benzene 
Trichloroethylene 
Ketone 2-Butanone 
Acetone 
Methyl isobutyl ketone 
p-Benzoquinone 
Total pentanone 
Nitrogenous TMA 
Sulfur compound Carbon disulfide 
Dimethyl sulfide 
DMTS 
Disulfide, dimethyl 
Ethane, (methylthio)- 
Propane, 1-(methylthio)- 
Terpene Caryophyllene 
Total α-pinene 
Total β-citronellene 
Total β-pinene 
Total carene 
Total γ-terpinene 
Total limonene 
Total menthene 
Figure 1

Emission patterns of VOC classes from the cakes as they were stored. The sum of individual VOC average concentrations are shown for the different classes emitted as the biosolids were stored. Note: different concentration ranges are used for each class. Stars indicate which day the cakes were mixed.

Figure 1

Emission patterns of VOC classes from the cakes as they were stored. The sum of individual VOC average concentrations are shown for the different classes emitted as the biosolids were stored. Note: different concentration ranges are used for each class. Stars indicate which day the cakes were mixed.

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