Emission characteristics and assessment of odors from sludge anaerobic digestion with thermal hydrolysis pretreatment in a wastewater treatment plant

Han, Zhangliang; Li, Ruoyu; Shen, Hanzhang; Qi, Fei; Liu, Baoxian; Shen, Xiue; Zhang, Lin; Wang, Xiaoju; Sun, Dezhi

doi:10.1016/j.envpol.2021.116516

Cited by 18 publications

(2 citation statements)

References 37 publications

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“…where C p is the VOCs average concentration in the shorter time integration, C m is the 1 h average concentration of VOCs in the longer time integration, t m is the duration of the long interval (1 h), t p is the duration of the short interval (5 min), and u is the stability ratio depending on the ambient air (used 0.25 for slightly stable atmospheric stability) [26]. Calculated values were evaluated as odor pollution by applying the theoretical odor concentration equation [27] as shown in Equation (2).…”

Section: Odor Evaluationmentioning

confidence: 99%

Comprehensive Evaluation of Odor-Causing VOCs from the Painting Process of the Automobile Manufacturing Industry and Its Sustainable Management

et al. 2022

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Automotive manufacturing is one of the potential sources of air pollution particularly involving volatile organic compounds (VOCs). This study intensively evaluated VOC emissions and their dispersion from the industry. The measured VOCs were speciated for further evaluation of their odor threats according to the characteristics of each compound. Mathematical emission and air dispersion models were applied to assist in elaborating the source–receptor relationship allowing the determining of existing business-as-usual conditions with proposed mitigation measures to manage the pollution of the factory studied in this paper. Seven VOC species potentially caused odor problems to the surrounding community, including 1-butanol, ethyl benzene, toluene, m,p xylene, o xylene, methyl ethyl ketone, and methyl isobutyl ketone. The results from the AERMOD dispersion model revealed that the smell from these chemicals could reach up to about 800 m from the source. Analysis of mitigation measures indicated that two interesting scenarios should be considered according to their effectiveness. The concentrations of VOCs can decrease by up to 4.7, 14.0 and 24.9% from increasing the physical stack height by +1, +3 and +5 m from its existing height, respectively. Modification of the aeration tank of the wastewater treatment unit to a closed system also helped to reduce about 27.8% of emissions resulting in about a 27.6% decreased ambient air concentration. This study provided useful information on the characteristics of VOCs emitted by the automobile manufacturing industry. It also demonstrated the relevant procedures and highlights the necessity to comprehensively analyze the source–receptor relationship to evaluate the most appropriate measures in managing industrial air pollution.

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Section: Odor Evaluationmentioning

confidence: 99%

Comprehensive Evaluation of Odor-Causing VOCs from the Painting Process of the Automobile Manufacturing Industry and Its Sustainable Management

et al. 2022

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“…According to the results of Xue et al [5], methyl sulfide and H 2 S were the dominant compounds causing odor from another co-processing cement kiln, with odor contributions of 18.30% and 17.70%, respectively. The odor emission of a sludge treatment using anaerobic digestion with thermal hydrolysis pre-treatment was mainly contributed by NH 3 and volatile sulfur compounds [45]. The stack gas may share the same odor components of sludge since the co-processing cement plant used sludge as an alternative fuel.…”

Section: Main Odor Componentsmentioning

confidence: 99%

Prioritization of VOCs Emitted from Co-Processing Cement Kiln Using a Fuzzy Analytic Hierarchy Process Method

Yang

Wang

et al. 2022

Atmosphere

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The violate organic compounds (VOCs) emission from co-processing cement kiln has not been comprehensively investigated and evaluated. In this study, we sampled and determined the VOCs emitted from a typical co-processing cement kiln in Beijing, China. VOCs characteristics, ozone formation potential (OFP), and main odor components for the emitted gas were analyzed. Additionally, a Fuzzy Analytic Hierarchy Process (F-AHP) was innovatively applied to estimate the priority VOCs. The study shows that aromatic (36.6%) and oxygen contained VOCs (O-VOCs) (30.3%) were the most abundant VOCs, with a high average concentration of benzene (1622.0 μg/m3) and acrolein (1105.5 μg/m3). Acrolein, propene, benzene, 1-butane, and 1,3-butadiene were the dominate OFP compounds, with the corresponding average OFP concentration of 8325.6, 3768.2, 1167.9, 1065.9, and 1027.2 μg/m3, respectively. Acrolein was also found to be the dominate main odor component. Eleven VOCs, including one O-VOC, one halohydrocarbon, and nine alkenes, were screened out by F-AHP. Alkene was the priority VOCs category and acrolein was the most important VOC in the stack gas. The results of this study are helpful to systematically understand the VOCs’ characteristics, OFP, main odor components, and priority compounds of VOCs in the stack gas of co-processing cement kiln, and provide a new method for the screening of priority VOCs compounds.

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Odor generation, identification, and control during anaerobic digestion of organic solid wastes

Luo

Sun

Yao

et al. 2022

Advances in Bioenergy

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Emission characteristics and assessment of odors from sludge anaerobic digestion with thermal hydrolysis pretreatment in a wastewater treatment plant

Cited by 18 publications

References 37 publications

Comprehensive Evaluation of Odor-Causing VOCs from the Painting Process of the Automobile Manufacturing Industry and Its Sustainable Management

Comprehensive Evaluation of Odor-Causing VOCs from the Painting Process of the Automobile Manufacturing Industry and Its Sustainable Management

Prioritization of VOCs Emitted from Co-Processing Cement Kiln Using a Fuzzy Analytic Hierarchy Process Method

Odor generation, identification, and control during anaerobic digestion of organic solid wastes

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