Pilot study on gaseous pollution removal efficiency of acid scrubbing in a broiler house

Cao, Tiantian; Zheng, Yaming; Zhang, Yu; Wang, Yue; Cong, Qunxin; Wang, Yuanhao; Dong, Hongmin

doi:10.1016/j.agee.2022.108021

Cited by 8 publications

(2 citation statements)

References 31 publications

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“…It reveals that the acid scrubbing could eliminate ammonia from odor gas but pH is crucial. A similar conclusion was reported by the other study [24].…”

Section: Ammonia Removal By Acid Scrubbingsupporting

confidence: 92%

The Comparison of Biotreatment and Chemical Treatment for Odor Control during Kitchen Waste Aerobic Composting

Wei¹,

Wang

Zhang

et al. 2022

Separations

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Odor ΨΩγemission has become mathvariant="normal" mathvariant="sans-serif-bold-italic" an important issue in kitchen waste management. Ammonia and hydrogen sulfide are the two most important odor sources as they contribute malodor and can cause health problems. As biotreatment and chemical treatment are two majorly applied technologies for odor control, in this study, they were used to remove ammonia and hydrogen sulfide and the performance of each process was compared. It was found that chemical absorption could efficiently eliminate both ammonia and hydrogenmathvariant="script" sulfide, and the removal efficiencies of ammonia and hydrogen sulfide highly depended on the pH of the adsorbent, contacting time, and gas and solution ratio (G/S). The ammonia-removal efficiency reached 100% within less than 2 s at G/S 600 and pH 0.1. The complete removal of hydrogen sulfide was achieved within 2 s at G/S 4000 and pH 13. Biotrickling filter showed better ability for hydrogen sulfide removal and the removal efficiency was 91.9%; however, the ammonia removal was only 73.5%. It suggests that chemical adsorption is more efficient compared to biotreatment for removing ammonia and hydrogen sulfide. In the combination of the two processes, biotrickling filter followed by chemical adsorption, the final concentrations of ammonia and hydrogen sulfide could meet the Level 1 standard of Emission Standards for Odor Pollution (China). The study provides a potential approach for odor control during kitchen waste aerobic composting.

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“…It reveals that the acid scrubbing could eliminate ammonia from odor gas but pH is crucial. A similar conclusion was reported by the other study [24].…”

Section: Ammonia Removal By Acid Scrubbingsupporting

confidence: 92%

The Comparison of Biotreatment and Chemical Treatment for Odor Control during Kitchen Waste Aerobic Composting

Wei¹,

Wang

Zhang

et al. 2022

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“…Figure 4B shows that sulfuric compounds concentration changes in different composting stages. During the early stages of composting, volatile sulfides are rapidly formed from biodegradable organic sulfur, resulting in a significant increase in dimethyl disulfide and carbon disulfide emissions (Han et al, 2019;Cao et al, 2022). However, as composting progresses, the biodegradable organic sulfur content decreases, and the oxygen supply increases, reducing carbon disulfide and dimethyl disulfide emissions.…”

Section: R O Ch H S R Oh Ch Shmentioning

confidence: 99%

Volatile organic compounds conversion pathways and odor gas emission characteristics in chicken manure composting process

Jiang

Yao²,

Liu

et al. 2023

Front. Ecol. Evol.

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IntroductionComposting is a highly effective method for managing the growing quantity of agricultural waste, promoting nutrient recycling, and advancing sustainable agriculture. However, the significant amounts of volatile inorganic compounds (VICs) and volatile organic compounds (VOCs) generated during the composting process cannot be ignored due to their serious ecological environmental hazards and detrimental impact on human health. The types and pathways of VICs and VOCs produced during the composting process remain not well understood.MethodsIn this study, we investigated the VOCs produced during chicken manure and straw composting using gas chromatography–mass spectrometry (GC/MS). We performed qualitative and quantitative analyses of VOCs in composting emissions gases and their correlation with odor.ResultsOur results showed that 44 VOCs were detected during composting, including 4 oxidation-containing compounds, 2 sulfur-containing organics, 5 alkanes, 19 halogenated compounds, and 14 aromatic compounds. Aromatic compounds were found to be the main component of VOCs, accounting for 59.14% of the total content. The highest VOC content was found in the pre-composting period, and the highest emitting VOC was p-Isopropyl Toluene, which reached 7870.50 μg/m3. We identified eight substances that were highly correlated with odor concentration (p < 0.01) and are the main odor-causing substances that need to be monitored and controlled.DiscussionOur study provides important insights into the transformation of volatile gases during the composting process. It highlights the need for proper management practices to control VOCs emissions and reduce their environmental impact.

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Odor control technologies for municipal solid waste mechanical biological treatment plant: a review

Zhang,

Ma,

Zhang

et al. 2024

Clean Techn Environ Policy

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Pilot study on gaseous pollution removal efficiency of acid scrubbing in a broiler house

Cited by 8 publications

References 31 publications

The Comparison of Biotreatment and Chemical Treatment for Odor Control during Kitchen Waste Aerobic Composting

The Comparison of Biotreatment and Chemical Treatment for Odor Control during Kitchen Waste Aerobic Composting

Volatile organic compounds conversion pathways and odor gas emission characteristics in chicken manure composting process

Odor control technologies for municipal solid waste mechanical biological treatment plant: a review

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