Emission characteristics and health risk assessment of VOCs from a food waste anaerobic digestion plant: A case study of Suzhou, China

Zheng, Guodi; Liu, Junwan; Shao, Zhuze; Chen, Tongbin

doi:10.1016/j.envpol.2019.113546

Cited by 47 publications

(35 citation statements)

References 44 publications

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“…Portable GC-MS (gas chromatography-mass spectroscopy) [239] CH 4 emissions from pressure relief valves of an agricultural biogas plant Flow velocity and temperature sensors [240] Ammonia in biogas Impedance measurement of biogas condensate in the gas room above the digester [241] Dissolved active trace elements in biogas Total reflection X-ray fluorescence spectroscopy in dried digester slurry [238] H 2 S in biogas Gas responsive nano-switch (copper oxide composite) [242] Microbial communities depend on the substrate combinations Sequencing of the 16S rRNA, biodegradable feedstock samples from eight different biogas plants [243] Controlling gas pressure in the digester Programmable logic controller (PCL) [244] Ammonia in biomethane The currently available technologies do not enable the monitoring of all operational parameters of the biogas plant. Therefore, samples have to be collected from the biogas plant and analyzed in individual facilities (off-line monitoring) [142].…”

Section: Measurement Methods Referencementioning

confidence: 99%

Operational Parameters of Biogas Plants: A Review and Evaluation Study

et al. 2020

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The biogas production technology has improved over the last years for the aim of reducing the costs of the process, increasing the biogas yields, and minimizing the greenhouse gas emissions. To obtain a stable and efficient biogas production, there are several design considerations and operational parameters to be taken into account. Besides, adapting the process to unanticipated conditions can be achieved by adequate monitoring of various operational parameters. This paper reviews the research that has been conducted over the last years. This review paper summarizes the developments in biogas design and operation, while highlighting the main factors that affect the efficiency of the anaerobic digestion process. The study’s outcomes revealed that the optimum operational values of the main parameters may vary from one biogas plant to another. Additionally, the negative conditions that should be avoided while operating a biogas plant were identified.

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Section: Measurement Methods Referencementioning

confidence: 99%

Operational Parameters of Biogas Plants: A Review and Evaluation Study

et al. 2020

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“…SCCAs can be monitored on-and off line with near or mid-wavelength infrared spectroscopy sensors (Falk et al, 2015;Nespeca et al, 2017). Infrared spectroscopy (Nespeca et al, 2017) or gas chromatography for the detection of volatile compounds (Zheng et al, 2020) has proven to be a suitable strategy for identifying concentration changes of acids in a short time scale (Björnsson et al, 2001), however this is rarely applied in practice so far.…”

Section: Monitoring and Controlmentioning

confidence: 99%

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

et al. 2021

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The flexibilization of bioenergy production has the potential to counteract partly other fluctuating renewable energy sources (such as wind and solar power). As a weather-independent energy source, anaerobic digestion (AD) can offer on-demand energy supply through biogas production. Separation of the stages in anaerobic digestion represents a promising strategy for the flexibilization of the fermentative part of biogas production. Segregation in two reactor systems facilitates monitoring and control of the provision of educts to the second methanogenic stage, thus controlling biogas production. Two-stage operation has proven to reach similar or even higher methane yields and biogas purities than single-stage operation in many different fields of application. It furthermore allows methanation of green hydrogen and an easier combination of material and energy use of many biogenic raw and residual biomass sources. A lot of research has been conducted in recent years regarding the process phase separation in multi-stage AD operation, which includes more than two stages. Reliable monitoring tools, coupled with effluent recirculation, bioaugmentation and simulation have the potential to overcome the current drawbacks of a sophisticated and unstable operation. This review aims to summarize recent developments, new perspectives for coupling processes for energy and material use and a system integration of AD for power-to-gas applications. Thereby, cell physiological and engineering aspects as well as the basic economic feasibility are discussed. As conclusion, monitoring and control concepts as well as suitable separation technologies and finally the data basis for techno-economic and ecologic assessments have to be improved.

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“…Long-term exposure to workshop air with high-level VOCs concentrations is harmful to human health [17,18]. The widely used health risk assessment methods of VOCs mainly include non-cancer risk and lifetime cancer risk methods developed by the Environmental Protection Agency of United States (US EPA) [7,19], as well as the threshold limit values (TLV) method recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) [18,20]. Some studies have used these methods to evaluate the health risk of VOCs in petrochemical, chemical, and other industries [19,21,22].…”

Section: Introductionmentioning

confidence: 99%

VOCs Fugitive Emission Characteristics and Health Risk Assessment from Typical Plywood Industry in the Yangtze River Delta Region, China

Liu

Wang

et al. 2021

Atmosphere

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Volatile organic compounds (VOCs) emissions from the plywood manufacturing industry in China have received concerns during recent years. A total of 115 VOCs were measured in the adhesive-making, adhesive-coating, and hot-pressing workshops of the plywood manufacturing industry to investigate fugitive emission characteristics of VOCs and assess their health risks to workers. The average concentration of total VOCs in workshops of the plywood manufacturing industry is 467 ± 359 μg/m3, whereas the value for ambient air is 81.4 μg/m3. For specific processes, the adhesive-coating and hot-pressing processes show higher VOCs concentrations (501 μg/m3–519 μg/m3) than the adhesive-making process (340 μg/m3). Formaldehyde, ethyl acetate, and dichloromethane are the three most abundant VOCs in workshops, with relative contributions to total VOCs of 55.9–63.1%, 4.3–11.0%, and 1.7–4.4%, respectively. For ozone formation potential (OFP) of VOCs, formaldehyde is the largest contributor (86.1%), followed by toluene, xylenes, and propanal. The non-cancer toxic risks (HI) and cancer risks of total VOCs (T-LCR) for three processes are calculated as 2.93–3.94 and 2.86–4.17 × 10−4 using the US EPA recommended methods, both significantly higher than threshold values (1.0 for HI and 10−4 for LCR), suggesting the highly toxic and cancer risks to workers. Formaldehyde contributes 68.1–78.2% and 91.4–93.9% of HI and T-LCR, respectively. The designed risk reduction scheme of VOCs based on air ventilation suggests that air ventilation rates of formaldehyde need to reach 4–5 times in 8 h in three processes to reduce T-LCR to 10−5. These results are useful for developing VOCs control measures and evaluating VOCs occupational health risk for workers in the plywood manufacturing industry.

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Emission characteristics and health risk assessment of VOCs from a food waste anaerobic digestion plant: A case study of Suzhou, China

Cited by 47 publications

References 44 publications

Operational Parameters of Biogas Plants: A Review and Evaluation Study

Operational Parameters of Biogas Plants: A Review and Evaluation Study

Phase Separation in Anaerobic Digestion: A Potential for Easier Process Combination?

VOCs Fugitive Emission Characteristics and Health Risk Assessment from Typical Plywood Industry in the Yangtze River Delta Region, China

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