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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Wastewater treatment by anaerobic filter and sand filter: Hydraulic loading rates for removing organic matter, phosphorus, pathogens and nitrogen in tropical countries

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Tonon, Daniele [1] ; Tonetti, Adriano Luiz [1] ; Coraucci Filho, Bruno [1] ; Camargo Bueno, Daniel Augusto [1]
Total Authors: 4
[1] UNICAMP State Univ Campinas, Sch Civil Engn Architecture & Urbanism FEC, BR-13083852 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ECOLOGICAL ENGINEERING; v. 82, p. 583-589, SEP 2015.
Web of Science Citations: 11

This study evaluated a wastewater treatment system combining anaerobic filters and sand filters, focusing on the suitability of such system to remove solids, organic matter, phosphorus, and pathogens, as well as the nitrification efficiency of the sand filters employed. The anaerobic filters were filled with shells of coconuts of the species Cocos nucifera, while the sand filters included 0.75-meter deep sand beds, exposed to hydraulic loading rates ranging from 100 to 800 L m(-2) day(-1). As a result, we could ascertain that the system has the capacity to receive rates above those suggested as the maximum threshold by a Brazilian standard, namely ABNT (1997), and the U.S. standard (USEPA, 1999). A minimum removal of 95% of COD and BOD was found, regardless of the hydraulic loading rates used. The only parameter evaluated that showed a significant difference in the means found was nitrogen. At a hydraulic loading rate of 700 L m(-2) day(-1), the concentration of N-NH4+ surpassed that of nitrate, pointing to the loss of nitrification efficiency. On account of this, this compound should be considered the reference parameter to ascertain the hydraulic loading threshold connected to the anaerobic effluents flown into sand filters. (C) 2015 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/21919-7 - Building at full scale and evaluation of low cost wastewater treatment from isolated society
Grantee:Adriano Luiz Tonetti
Support type: Regular Research Grants