Emission characteristics of volatile sulfur compounds (VSCs) from a municipal sewage sludge aerobic composting plant

Han, Zhangliang; Qi, Fei; Wang, Hui; Liu, Baoxian; Shen, Xiue; Song, Cheng; Bao, Zhiyuan; Zhao, Xufeng; Xu, Yangjie; Sun, Dezhi

doi:10.1016/j.wasman.2018.05.049

Cited by 44 publications

(18 citation statements)

References 45 publications

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“…The release flux of NH 3 and VSCs during the aerobic composting was measured using static chamber method (Hudson and Ayoko 2008;Zhang et al 2013). The experimental setup of the static chamber is shown in Figure A3 in the Appendix (Han et al 2018a(Han et al , 2018b. The static chamber consists of three parts: 1) holding tank with volume of 30 L and sealed cap with three connecting holes; 2) two sampling valves that connecting to SUMMA canister and portable analyzer; 3) One pressure balance opening that connecting to a 5 L Teflon sampling bag is used as pressure buffer device.…”

Section: Sampling Methodsmentioning

confidence: 99%

Volatile sulfide compounds (VSCs) and ammonia emission characteristics and odor contribution in the process of municipal sludge composting

Zhao

Yang

Zhang

et al. 2019

Journal of the Air & Waste Management Association

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Malodor is becoming the main secondary pollution in the municipal sewage sludge-composting process. Ammonia and volatile sulfide compounds (VSCs) are the representative odorants that generated and emitted during the composting process. The emission characteristics of ammonia and VSCs were studied at different workshops in a full-scale municipal sludge-composting plant in North People's Republic of China. Results show that ammonia was the most dominant odorant of all the workshops and relative high concentrations of VSCs were detected at sludge stacking yard and composting workshop. The odor pattern of VSCs at the composting workshop and stacking yard were different. The odor pollution occurred mainly in the first 15 days of the composting process, in which the odor contribution of ammonia increased with time and the VSCs contributed largely in the first 5 days. The cumulative release concentration of VSCs from compost materials was in the order of DMDS (dimethyl disulfide) > DMS (dimethyl sulfide) > CS2 > MT (methyl mercaptan), and the total VSCs release concentration was in the range of 50-3200 μg•m −3 . The production of ammonia correlated to the temperature and nitrogen content and state changes, however, the production of VSCs was more complicated due to the reaction and transformation of VSCs. Optimization of aerobic composting conditions and process parameters should be further studied to reduce the emission of odor gas from compost.Implications: Along with the widespread use of sludge aerobic composting in People's Republic of China, the malodor pollution during the composting treatment is becoming a serious environmental issue. The odor pollution occurred mainly in the first 15 days, and ammonia was the main odorant of all the workshops and need to be controlled. Relative high concentrations of VSCs were detected at sludge stacking yard and composting workshop, however, the odor impact of VSCs were different. The generation of VSCs is more complicated than ammonia due to the reaction and transformation of VSCs.

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Section: Sampling Methodsmentioning

confidence: 99%

Volatile sulfide compounds (VSCs) and ammonia emission characteristics and odor contribution in the process of municipal sludge composting

Zhao

Yang

Zhang

et al. 2019

Journal of the Air & Waste Management Association

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“…The emission of VSCs is mainly due to the insufficient oxygen supply, and the O 2 feedback control could reduce the VSCs production. 55 The O 2 concentration in the compost pile is controlled by aeration. Shortening the aeration interval or aerating continuously to maintain a high O 2 concentration in the pile is an effective strategy for restraining the VSCs production, but the effect on NH 3 is not ideal.…”

Section: Adjustment Of the Composting Conditionsmentioning

confidence: 99%

“…The emission of VSCs is mainly due to the insufficient oxygen supply, and the O 2 feedback control could reduce the VSCs production. 55 …”

Section: Odor Control During Compostingmentioning

confidence: 99%

Reducing odor emissions from feces aerobic composting: additives

et al. 2021

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“…[1] The sulfur in the transportation fuel undergoes combustion to produce highly lethal SOx, which constitute a major air pollution when emitted to the atmosphere. [2,3] Acid rain, photochemical smog, and corrosion, which are harmful to the ecosystem, human health, aquatic animals, industrial piping and equipment, are the resulting effects of the sulfur pollution. [4,5] In lieu of this, the policymakers are working tirelessly to limit the environmental, social and economic negative impact of sulfur emission to a minimum threshold, while zero emission will be adopted universally in the nearest future.…”

Section: Introductionmentioning

confidence: 99%

“…Sulfur is the third largest constituent in crude oil after carbon and hydrogen accounting for up to 3.5% in the crude components [1] . The sulfur in the transportation fuel undergoes combustion to produce highly lethal SOx, which constitute a major air pollution when emitted to the atmosphere [2,3] . Acid rain, photochemical smog, and corrosion, which are harmful to the ecosystem, human health, aquatic animals, industrial piping and equipment, are the resulting effects of the sulfur pollution [4,5] .…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

Ganiyu

2021

Chemistry An Asian Journal

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It is undisputed that there is a paradigm shift in the global trend of crude oil towards being more sour and heavier than usual light sources. Consequently, the hydrotreating activity becomes a bottleneck with high content of S, N, metals and other impurities than expected. On the other hand, the price of petroleum products lately witnessed instability and fell to the lowest average price (<USD 20) in recent times. In the same vein, the regulation to control the emission of toxic compounds in the atmosphere become stricter as promulgated by various policymakers. In this sense, robust hydrotreating catalysts with characteristics efficient catalytic activity, selectivity and stability are highly desirable. Recently, different approaches have been used to improve and cushion the unprecedented effect emanated from economic, social and environmental challenges posed by heavy and sour crude sources, price instability of the refined products and regulation to lower the sulfur to minimum level or zero parts per millions (ppm). Importantly, the role of support in catalysis cannot be over emphasized, whilst the surface area and porosity, mechanical and thermal stability, dispersion of active metals, acidity/basicity have been greatly improved, the increased activity, stability and selectivity has been observed significantly. In this review, hybrid supports based on aluminosilicates (zeolitic types) and other notable supports from recent literatures were explored and discussed for Ni(Co)Mo(W) supported catalysts for hydrodesulfurization (HDS) activity of heavy organosulfur molecules. The emphasis on the hybrid supports’ varied characteristics for HDS of organosulfur molecules, where there are necessities for fast diffusion of reactants and products, better dispersion of MoS2 crystallites, high surface area and pore volume, and increased acidity of the catalysts are greatly emphasized. Furthermore, the progress made so far on different HDS active phases viz. noble metals, metal phosphides, intermetallic silicides, carbides and iron‐zinc are highlighted in this write‐up, irrespective of the support composition in the supported catalysts formulations. The need for application of predictive tools, like machine learning (ML) in the design and development of HDS catalysts, and performance evaluation of HDS activity towards achieving better catalytic operation was briefly highlighted. Finally, the review will serve as a summary of scientific efforts in this regards and bridge a gap for the newcomers to investigate the topic in a better way through proper selection and efficient catalysts design.

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Emission characteristics of volatile sulfur compounds (VSCs) from a municipal sewage sludge aerobic composting plant

Cited by 44 publications

References 45 publications

Volatile sulfide compounds (VSCs) and ammonia emission characteristics and odor contribution in the process of municipal sludge composting

Volatile sulfide compounds (VSCs) and ammonia emission characteristics and odor contribution in the process of municipal sludge composting

Reducing odor emissions from feces aerobic composting: additives

Hierarchical Hybrid Supports and Synthesis Strategies for Hydrodesulfurization of Recalcitrance Organosulfur Compounds

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