There are many types of technologies to control cooking oil fumes (COFs), but current typical technologies, such as electrostatic precipitator, conventional scrubber, catalyst, or condenser, are unable to efficiently remove the odorous materials present in COFs which are the primary cause of odor-complaint cases. There is also a lack of information about using sodium hypochlorite (NaOCl) and surfactants to remove contaminants in COFs, and previous studies lack on-site investigations in restaurants. This study presents a chemical scrubber integrated with an automatic control system (ACS) to treat hydrocarbons (HCs) in COFs, and to monitor non-methane HCs (NMHC) and odor as indicators for its efficiency evaluation. The chemical scrubber effectively treats hydrophobic substances in COFs by combining surfactant and NaOCl under optimal operational conditions with NHMC removal efficiency as high as 85%. The mass transfer coefficient (K(L)a) of NMHC was enhanced by 50% under the NaOCl and surfactant conditions, as compared to typical wet scrubber. Further, this study establishes the fuzzy equations of the ACS, including the relationship between the removal efficiency and K(L)a, liquid/gas ratio, pH and C(NaOCl).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jhazmat.2010.05.122 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Exploring the synergistic effect of NaOH/NaClO absorbent in a novel wet FGD scrubber to control SOx/NOx emissions.
Environ Monit Assess
January 2025
International Joint Research Center For Green Energy and Chemical Industry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.
Escalating SOx and NOx emissions from industrial plants necessitates customized scrubbing solutions to improve removal efficiency and tackle cost limitations in existing wet FGD units. This work investigates the real-time intensified removal pathways via an innovative two-stage countercurrent spray tower configuration strategically integrating NaOH (M) and NaOH/NaClO (M/M) to remove SOx and NOx emissions simultaneously from the industrial stack through a comprehensive parametric study of absorbents concentration, reaction temperature, gas flow rate, liquid to gas ratio (F/F), and absorbent showering head. Flue gas stream comprising SO bearing 4500 ppm, SO bearing 300 ppm, 70 ppm NO, and 50 ppm NO brought into contact with two scrubbing solutions as M, and a complex absorbent of M/M at varying respective ratios.
View Article and Find Full Text PDFWet scrubbing coupled with advanced oxidation process for removal of chlorobenzene: A study of performance and mechanisms.
Environ Res
January 2025
Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong. Electronic address:
Porous graphitized carbon (PGC)-supported CoFeO bimetallic catalysts (CoFeO/PGC) were prepared by a hydrothermal method using Fe(NO)·9HO and Co(NO)·6HO as precursors and were used to activate peroxymonosulfate (PMS) for the degradation of chlorobenzene (CB). Under the conditions of CoFeO/PGC catalysts and PMS concentrations of 0.1 g/L and 5 mM, respectively, in a wide range of pH (5.
View Article and Find Full Text PDFA new form of hazardous microparticulate contamination to the marine environment from ships using heavy fuel oil with exhaust gas scrubbers - Characterization and implications for fate, transport and ecotoxicity.
Sci Total Environ
January 2025
Department of Marine Science, University of Gothenburg, 45178 Fiskebäckskil, Sweden.
Aiming to reduce sulfur oxides emission in the atmosphere, the International Maritime Organization developed regulations on shipping that came into effect in 2020. The new rules incentivized many owners to install scrubber systems on thousands of ships. However, the overall environmental implications of scrubbers is a controversial subject, largely due to the release of acids, metals, and chemicals in the oceans and impact on marine life.
View Article and Find Full Text PDFApplying quantitative structure-activity relationship (QSAR) models to extend the mixture toxicity prediction of scrubber water.
Environ Pollut
December 2024
Chalmers University of Technology, Gothenburg, 41296, Sweden.
Marine organisms are constantly exposed to complex chemical mixtures from natural and anthropogenic sources. One source that has raised concerns is the discharge water from ships equipped with exhaust gas cleaning systems, commonly known as scrubbers. During operation, ships with scrubbers discharge large volumes of scrubber water, known to adversely affect marine organisms, into the environment.
View Article and Find Full Text PDFProjected changes of the emission and transport of organic pollutants and metals from shipping in European seas 2018-2050.
Mar Pollut Bull
December 2024
Finnish Meteorological Institute, Atmospheric Composition Research, P.O. Box 503, Helsinki FI-00101, Finland.
The ChemicalDrift model is applied to predict concentrations of metals and polycyclic aromatic hydrocarbons emitted from shipping in European seas in 2050, compared to 2018. Sources include antifouling paints (AFPs), discharge water from scrubbers and atmospheric deposition. The fate of pollutants in the marine environment is presented, highlighting the effect of degradation and volatilization, with seasonal and regional differences.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!