Effect of COD/SO42- ratio on anaerobic treatment of landfill leachate during the start-up period
Küçük Resim Yok
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
TAYLOR & FRANCIS LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This study investigates the performance of an anaerobic baffled reactor (ABR) during the start-up period of raw young landfill leachate treatment at two chemical oxygen demand (COD) to SO42- ratios of 20 and 4. The reactor was operated at ambient temperature and low organic loading rates (0.52, 0.76 and 1.05 kgCOD/m(3) per day). During the study, sulfate-reducing bacteria (SRB) activity increased at the lower ratio of COD/SO42- producing higher levels of sulfide and alkalinity. The dissolved sulfide concentration reached an inhibitory level above 250 mg/L, which caused a sharp reduction in the total COD removal efficiency from 77-80% to 32%. Total volatile fatty acid (TVFA) production proceeded at a constant level despite increased organic loading. As the effluent total and organic COD concentrations increased, the inhibitory effect of the inborn sulfide was correlated to the limitation experienced in the hydrolysis/acidogenesis stages, and thus VFA production and organic matter removal.
Açıklama
Anahtar Kelimeler
municipal solid waste landfills, landfill leachate, anaerobic baffled reactor (ABR), COD/SO42-, sulfide toxicity
Kaynak
ENVIRONMENTAL TECHNOLOGY
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
33
Sayı
3
