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http://dx.doi.org/10.4491/eer.2018.324

Microwave-enhanced gasification of sewage sludge waste  

Chun, Young Nam (Department of Environmental Engineering, Chosun University)
Song, Hee Gaen (Department of Environmental Engineering, Chosun University)
Publication Information
Environmental Engineering Research / v.24, no.4, 2019 , pp. 591-599 More about this Journal
Abstract
To convert sewage sludge to energy, drying-gasification characteristics during microwave heating were studied. During the gasification of carbon dioxide, the main products were gas, followed by char, and tar in terms of the amount. The main components of the producer gas were carbon monoxide and hydrogen including a small amount of methane and light hydrocarbons. They showed a sufficient heating value as a fuel. The generated tar is gravimetric tar, which is total tar. As light tars, benzene (light aromatic tar) was a major light tar. Naphthalene, anthracene, and pyrene (light polycyclic aromatic hydrocarbon tars) were also generated, but in relatively small amounts. Ammonia and hydrogen cyanide (precursor for NOx) were generated from thermal decomposition of tar containing protein and nitrogen in sewage sludge. In the case of sludge char, its average pore diameter was small, but specific area, pore volume, and adsorption amounts were relatively large, resulting in superior adsorption characteristics.
Keywords
$CO_2$ gasification; Microwave heating; Producer gas; Sewage sludge; Sludge char;
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