Municipal-Wastewater Treatment Using Upflow-Anaerobic Filters.

Autor: Manariotis, Ioannis D., Grigoropoulos, Sotirios G.
Předmět:
Zdroj: Water Environment Research (10614303); Mar2006, Vol. 78 Issue 3, p233-242, 10p, 1 Diagram, 7 Charts, 4 Graphs
Abstrakt: Three 12.5-L upflow-anaerobic filters (AF), with ceramic saddle, plastic-ring, and crushed-stone packing, were used to evaluate the sustained treatment of municipal wastewater. The reactors were initially fed dogfood-fortified wastewater and then raw municipal wastewater, and operated at 25.4°C (32 months) and 15.5°C (2 months). During 23 months, the AF units treated municipal wastewater (mean chemical oxygen demand [COD] 442 mg/L and total suspended solids [TSS] 247 mg/L), the hydraulic retention time (HRT) ranged from 3.1 to 0.30 d (empty bed), and the organic loading rate ranged from 0.115 to 1.82 kg COD/m³⋅d. At the higher temperature and an HRT (void volume) of 1.0 d, COD and TSS removals ranged from 74 to 79% and 95 to 96%, respectively; however, efficiencies declined substantially at HRT values less than 0.4 d. Reactor performance, under the same hydraulic and organic loadings, deteriorated with time and was adversely affected by lower temperature. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index