title: Presence of helminth eggs in domestic wastewater and its removal at low temperature UASB reactors in Peruvian highlands.
abstract: This work studied the anaerobic sludge filtration capacity for pathogens reduction in a 29 L and 1.65 m height lab-scale UASB reactor treating domestic wastewater at low temperatures in the city of Puno (Peru). The anaerobic sludge filtration capacity was performed applying upflow velocities of 0.12, 0.14, 0.16, 0.20, 0.27 and 0.41 m/h. Results show that the HE removal varied between 89 and 95% and the most common specie was Ascaris lumbricoides. Faecal coliform and Escherichia coli removal varied in the range of 0.9-2.1 and 0.8-1.6 log10 respectively. Likely related to the low operational temperatures, the total COD removal varied between 37 and 62%. The best performance in terms of removal of HE, total COD and turbidity was obtained at the lowest upflow velocity of 0.12 m/h. In order to meet WHO standards for water reuse a post-treatment unit will be required to polish the effluent.
authors.affiliation: Environmental Engineering Faculty, National University of Engineering, Lima 25, Peru; Sub-Department of Environmental Technology, University of Wageningen, 6700 AA Wageningen, The Netherlands. Electronic address: rosa.yayabeas@wur.nl.
authors.forename: Rosa-Elena
authors.initials: RE
authors.lastname: Yaya-Beas
authors.affiliation: Environmental Engineering Faculty, National University of Engineering, Lima 25, Peru.
authors.forename: Erika-Alejandra
authors.initials: EA
authors.lastname: Cadillo-La-Torre
authors.affiliation: Sub-Department of Environmental Technology, University of Wageningen, 6700 AA Wageningen, The Netherlands; Lettinga Associates Foundation (LeAF), P.O. Box 500, 6700 AM Wageningen, The Netherlands.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Kujawa-Roeleveld
authors.affiliation: Section Sanitary Engineering, Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2600 GA Delft, The Netherlands; Unesco-IHE Institute for Water Education, Westvest 7, 2611 AX Delft, The Netherlands.
authors.forename: Jules B
authors.initials: JB
authors.lastname: van Lier
authors.affiliation: Sub-Department of Environmental Technology, University of Wageningen, 6700 AA Wageningen, The Netherlands; Lettinga Associates Foundation (LeAF), P.O. Box 500, 6700 AM Wageningen, The Netherlands.
authors.forename: Grietje
authors.initials: G
authors.lastname: Zeeman
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D017164:Ascaris lumbricoides; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D004867:Equipment Design; D004926:Escherichia coli / Q000302:isolation & purification; D005374:Filtration; D006376:Helminths / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000737:chemistry; D010063:Ovum; D010568:Peru; D012722:Sewage; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater / Q000469:parasitology*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods*
chemical_list: D008697:Methane; D012722:Sewage; D062065:Wastewater
keywords: Helminth eggs; Municipal wastewater; Pathogens; Sludge bed filtration capacity; UASB reactor