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- Title
UPGRADING THE EFFLUENT QUALITY OF AN AERATED LAGOON WITH HORIZONTAL ROUGHING FILTRATION.
- Authors
NABIZADEH, RAMIN; NADDAFI, KAZEM; KHAZAEI, MOHAMMAD; FARD, REZA FOULADI; IZANLOO, HASSAN; YAVARI, ZEYNAB
- Abstract
Removal of suspended solids and microorganisms from an aerated lagoon effluent with a horizontal roughing filter (HRF) was investigated. The aerated lagoon receives Qom municipal wastewater. The HRF was operated at three filtration rates of 0.5, 1.0 and 1.5 m³/(m²·h) during four month operation period. The measured values of turbidity, TSS, COD, pH, temperature and flow rate of HRF at the former filtration rate were 79±12 NTU, 100±11 mg/dm³, 190±12 mg/dm³, 7±0.1 °C, 17±8 °C and 0.82 dm³/min, respectively. The differences between inlet and outlet values of pH and temperature were not significant (P > 0.05). Measures turbidity, TSS and COD in HRF final effluent were 15±13.7 NTU, 37±295 mg/dm³, 64±39.7 mg/dm³, respectively, which corresponds to 81.1%, 63% and 66.3% removal efficiencies, respectively. A decrease of removal efficiency was observed upon increasing filtration rates. The Spearman correlation coefficients between the head-loss and removal efficiencies ranged from 0.578 to 0.968 pointing to a direct relationship. Results of modeling approach revealed appropriate compliance between the values of the observed and predicted TSS for higher filtration rates.
- Subjects
ROUGHING filtration (Water purification); SUSPENDED solids; SEWAGE aeration; PH effect; TEMPERATURE effect
- Publication
Environment Protection Engineering, 2015, Vol 41, Issue 3, p121
- ISSN
0324-8828
- Publication type
Article
- DOI
10.37190/epe150309