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Water 2015, 7(3), 1149-1163; doi:10.3390/w7031149

The Effect of the Hydraulic Retention Time on the Performance of an Ecological Wastewater Treatment System: An Anaerobic Filter with a Constructed Wetland

Environmental Technology, Research Center and Assistance in Technology and Design of Jalisco, N.P.O., Normalistas 800, Guadalajara 44270, Jalisco, Mexico
These authors contributed equally to this work.
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Author to whom correspondence should be addressed.
Academic Editor: Say-Leong Ong
Received: 18 December 2014 / Revised: 19 January 2015 / Accepted: 19 February 2015 / Published: 17 March 2015
(This article belongs to the Special Issue Water Quality Control and Management)
View Full-Text   |   Download PDF [960 KB, uploaded 9 June 2015]   |  

Abstract

This work assesses the performance of a municipal pilot wastewater treatment system employing an up-flow anaerobic filter (UAF) followed by a horizontal subsurface constructed wetland (HSSCW). This pilot scale demonstration project was implemented in a zone with subtropical climate in order to protect Lake Chapala from wastewater loads that are discharged by small communities in the Lake’s vicinity. The filters were filled with tezontle as the media for biofilm support and the HSSCW was planted with two ornamental plants species, Canna hybrids and Strelitzia reginae. The experiment evaluated three hydraulic retention times (HRT) of 18, 28 and 38 h in the UAF, which corresponds to two, three and four days in HSSCW over 66 weeks. The mean efficiencies found for the complete system were 80% and 90% of BOD, 80% and 86% of COD, 30% and 33% of Ntot and between 24% and 44% of Ptot. It was possible to remove almost 80% of organic matter in 18 h in the UAF while the HSSCW reached 30% of removal for Ntot in a HRT of three days. As expected, the UAF was responsible for removing most of the organic matter and the HSSCW removed most of the nitrogen. View Full-Text
Keywords: constructed wetland; up-flow anaerobic filter; organic matter removal; nutrient removal; hydraulic retention time (HRT) constructed wetland; up-flow anaerobic filter; organic matter removal; nutrient removal; hydraulic retention time (HRT)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Merino-Solís, M.L.; Villegas, E.; de Anda, J.; López-López, A. The Effect of the Hydraulic Retention Time on the Performance of an Ecological Wastewater Treatment System: An Anaerobic Filter with a Constructed Wetland. Water 2015, 7, 1149-1163.

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