Performance analysis of the horizontal sub-surface flow constructed wetland under different hydraulic loading rates for rural domestic wastewater treatment

• Autorzy: Khairalla A. M. O. , Xiwu L. , Ladu J. L. , Wenbo Z.

Identyfikatory

DOI

10.5277/epe160409

• Języki publikacji: EN

Abstrakty

EN

The performance of horizontal subsurface flow constructed wetland (HFCW) for rural domestic sewage treatment has been evaluated. The system was built as a tertiary treatment after the biological processes to improve the effluent wastewater quality. The HFCW was operated in three phases under different hydraulic loading rates (HLRs), and with three kinds of aquatic plants i.e., water spinach, Chinese celery and cress. The vegetation growth parameters such as plant height, fresh and dry weights were monitored and analyzed. The influent and effluent concentrations of the chemical oxygen demand (COD), ammonium nitrogen (NH4+-N), total nitrogen (TN) and total phosphorus (TP) were measured. The average removal efficiencies at the first phase were 52.9%, 64.7%, 58.2% and 72.8%, and it reduced to 48.6%, 52.2%, 44.04% and 64.4% in the second phase for COD, NH4+-N, TN and TP, respectively. In the third phase, the HFCW system showed the following mean removal efficiencies: 51.2%, 74.2%, 58.5% and 80.9%. The results revealed that the removal efficiencies increased with decrease in the HLR and increased temperatures. The findings confirmed that the horizontal flow constructed wet-land is more convenient for the rural wastewater treatment with efficient nutrient removal.

Słowa kluczowe

EN

HFCW; Horizontal Flow Constructed Wetlands; rural sewage treatment plants; biological processes; retention time; oczyszczalnia hydrofitowa; wiejskie oczyszczalnie ścieków; czas retencji; procesy biologiczne

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2016
• Tom: Vol. 42, nr 4
• Strony: 107--121
• Opis fizyczny: Bibliogr. 24 poz., tab., rys.

Twórcy

autor

Khairalla A. M. O.

• Environmental Science and Engineering Department, Southeast University, Nanjing 210096, P.R. China
• Civil Engineering Department, Karary University, Khartoum 12304, Sudan

autor

Xiwu L.

• Environmental Science and Engineering Department, Southeast University, Nanjing 210096, P.R. China

autor

Ladu J. L.

• Environmental Science and Engineering Department, Southeast University, Nanjing 210096, P.R. China

autor

Wenbo Z.

• Environmental Science and Engineering Department, Southeast University, Nanjing 210096, P.R. China,

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