Iranian Association of Environmental Health (IAEH)
Abstract
The performance of an upflow anaerobic packed-bed reactor in the
upgrading of Parkandabad (Mashhad, north east of Iran) wastewater
treatment plant was studied in a pilot plant. The experiments were
performed at hydraulic retention times of 6, 12, 18 and 24h based on
empty reactor volume and the performance of the reactor was evaluated
based on the removal of organic matter (BOD5 and COD) and SS. The
average BOD5 and COD removal efficiencies were in the ranges of
79.0-89.3% and 75.7-87.2%, respectively, depending on HRT. The
relationship between the organic loading rate and organic removal rate
was linear in the loading range of 0.52-2.10kg BOD5/m3.d. The average
SS removal efficiencies at hydraulic retention times of 6, 12, 18 and
24h were obtained to be 82.9, 83.6, 81.2 and 87.4%, respectively. The
results indicated that the reactor in combination with existing
biological treatment process (completely mixed aerated lagoon) can
produce a high quality effluent
