Supercritical water gasification of sewage sludge by continuous flow tubular reactor: A pilot scale study
Yükleniyor...
Dosyalar
Tarih
2020
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/embargoedAccess
Özet
Treatment and disposal of sewage sludge constitute one of the major problems of wastewater treatment plants due to high water content and more stringent environmental regulations. Supercritical water gasification (SCWG) technology is accepted as a promising method for sustainable sludge disposal because of the elimination of need for costly water reduction and drying processes before disposal by conventional methods. The aim of this study is to determine the effect of temperature (450–650 °C), solid matter content (1–2%) and catalyst addition (0.5–2% KOH) on supercritical gasification of sewage sludge in a continuous-flow pilot scale tubular reactor. The results indicate that the gasification efficiency is generally temperature dependent. Furthermore, catalyst addition improves the gasification efficiency at high solids content. The produced gas contains 60% of H2 and 22% of CH4 at experimentally determined optimal conditions (650 °C, 2% solid matter content, 2% KOH). The resulting gas contains H2S and CO below detection limits and there is no need for additional treatment. Consequently, SCWG technology provides complete decomposition of organic matter in a short time, clean gas formation with higher energy content, and volumetric reduction compared to conventional methods.
Açıklama
Anahtar Kelimeler
Supercritical Gasification, Hydrogen, Renewable Energy, Catalyst, Pilot Scale Reactor
Kaynak
Waste and Biomass Valorization
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
391
Sayı
Künye
Adar, E., İnce, M., & Bilgili, M. S. (2020). Supercritical water gasification of sewage sludge by continuous flow tubular reactor: A pilot scale study. Chemical Engineering Journal, 391,123499.
