Upgrading the effluent quality of an aerated lagoon with horizontal roughing filtration

• Autorzy: Nabizadeh R. , Naddafi K. , Khazaei M. , Fard R. F. , Izanloo H. , Yavari Z.

Identyfikatory

DOI

10.5277/epel50309

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

filtration; efficiency; effluents; lakes; turbidity; water quality; effluent quality; filtration rate; municipal wastewaters; roughing filtration; Spearman correlation coefficients; suspended solids

PL

filtrowanie; wydajność; ścieki; jeziora; mętność; jakość wody; jakość ścieków; szybkość filtracji; ścieki komunalne; filtracja zgrubna; współczynniki korelacji Spearmana; zawiesiny

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2015
• Tom: Vol. 41, nr 3
• Strony: 121--136
• Opis fizyczny: Bibliograf. 25 poz., tab., rys.

Twórcy

autor

Nabizadeh R.

• Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

autor

Naddafi K.

• Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

autor

Khazaei M.

• Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

autor

Fard R. F.

• Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran

autor

Izanloo H.

• Research Center for Environmental Pollutants, Qom University of Medical Sciences, Qom, Iran

autor

Yavari Z.

• Department of Environmental Health Engineering, Esfahan University of Medical Sciences, Esfahan, Iran

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