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Author: search.filters.author.Dangwilailux, PanyaSubject: search.filters.subject.PAHs

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    Effect of Water Soluble Organic Carbon (WSOC) and Polycyclic Aromatic Hydrocarbons (PAHs) emitted by BioChar from the Rubber Sheets Processing Sewage Sludge Combustion
    (2023-10-01)
    Lakachaiworakun, Putipong
    ;
    Dangwilailux, Panya
    ;
    Eakvanich, Visit
    ;
    Kalasee, Wachara
    The total particle mass concentration, size distribution, pH form, polycyclic aromatic hydrocarbons (PAHs) value, the concentration of total Benzo[a]pyrene Toxic Equivalence (BaPTE) and water-soluble organic carbon (WSOC) of smoke particles from the rubber sheets processing sewage sludge biochar burning were studied. In this work, the temperature was measured at 500 mm above the fire base by using K-type thermocouples and a continuously data logger. The result showed that the measured temperature value increased when decreasing the biochar moisture content. The highest average total smoke particle mass concentration values at the initial burning time was found to be 17.53 to 35.27 mg/m3 and then it was persistently reduced until the 60th minute, when the burning was stopped. The pH of biochar's smoke particles was higher than it was before combustion. The total smoke particle mass concentration, the mass median aerodynamic diameter (MMAD) and PAHs values decreased with increasing burning period and decreased the biochar moisture content. The largest BaPTE emission was observed at the highest moisture content, which was within the range of the greatest particle mass (less than 0.43 micron) in an initial combustion period. This value was about 60% that of a given the total value of BaPTE concentration. Meanwhile, the amount of PAHs, the BaPTE concentration and WSOC were depended on the smoke particle number, moisture content and combustion period.
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    Smoke particle, polycyclic aromatic hydrocarbons and total benzo[a]pyrene toxic equivalence emitted by palm oil sewage sludge bio‐char combustion
    (2021-09-01)
    Kalasee, Wachara
    ;
    Dangwilailux, Panya
    The size distribution, total particle mass concentration (TPMC), polycyclic aromatic hydrocarbons (PAHs) value, and total Benzo[a]pyrene Toxic Equivalence (BaPTE) concentration of smoke particles from palm oil sewage sludge (POSS) bio‐char combustion were studied. In this experiment, temperature data of the POSS bio‐char combustion were recorded in two parts: particle temperature (Tp) by using a two‐color pyrometer and temperature at 300, 500 and 800 mm, respectively, above the fire base by using K‐type thermocouples. The POSS bio‐char moisture content, clean air speed values, and burning period affected the change of temperature above the fire base. The mass median aerodynamic diameter (MMAD) values of the POSS bio‐char combustion were found to be 0.44 to 1.05 micron at various moisture contents and burning periods. The MMAD, TPMC, and PAHs values increased with increasing moisture content and decreased the POSS biochar combustion period. For the total BaPTE values, the results showed that the decrease in moisture content of the POSS bio‐char samples had a prime influence in decreasing the total BaPTE values. Meanwhile, with decreases in the clean air speed values, the total BaPTE values were increased. Comparing the total BaPTE data between the experimental results and predicted values, the first‐degree model had a better fit in predicting than the zero‐degree model; this result was confirmed by the higher mean of the coefficient of determination.