Landfill gas upgrading with pilot-scale water scrubber: Performance assessment with absorption water recycling

Abstract A pilot-scale counter current absorption process for upgrading municipal solid waste (MSW) landfill gas to produce vehicle fuel was studied using absorption, desorption and drying units and water as an absorbent. Continuous water recycling was used without adding new water to the system. The process parameters were defined by a previous study made with this pilot system. The effect of pressure (20–25 bar), temperature (10–25 °C) and water flow speed (5.5–11 l/min) on the upgrading performance, trace compounds (siloxanes, halogenated compounds) and water quality were investigated. Raw landfill gas flow was kept constant at 7.41 Nm3/h. Methane (CH4) and carbon dioxide (CO2) contents …

Tukien tupakoimattomuuteen : tutkimus vanhempien tuen ja kontrollin, lähiympäristön tupakointimallien sekä kodin ilmapiirin yhteyksistä 9. luokkalaisten nuorten tupakointiin ja kotona tupakointiin

Odorous volatile organic compounds in waste and wastewater management

Determination of organic silicon compounds in biogas from wastewater treatments plants, landfills, and co-digestion plants

Abstract The study determined the organic silicon compounds in biogases from landfills, wastewater treatment plants (WWTPs), and biogas plants processing different organic material. The aim was to provide information for gas utilisation applications, as siloxanes are reported to shorten the life time of engines when biogas is used for energy production. In total, 48 samples were measured. The total concentration of organic silicon compounds in landfill and WWTP gases varied from 77 to 2460 μg/m3 while the concentrations in biogases from biogas plants varied from 24 to 820 μg/m3. The total concentration of organic silicon compounds was lowest (24 μg/m3) in the biogas plant processing grass a…

Occupational hygiene in terms of volatile organic compounds (VOCs) and bioaerosols at two solid waste management plants in Finland

Abstract Factors affecting occupational hygiene were measured at the solid waste transferring plant at Hyvinkaa and at the optic separation plant in Hameenlinna. Measurements consisted of volatile organic compounds (VOCs) and bioaerosols including microbes, dust and endotoxins. The most abundant compounds in both of the plants were aliphatic and aromatic hydrocarbons, esters of carboxylic acids, ketones and terpenes. In terms of odour generation, the most important emissions were acetic acid, 2,3-butanedione, ethyl acetate, alpha-pinene and limonene due to their low threshold odour concentrations. At the optic waste separation plant, limonene occurred at the highest concentration of all sin…