Study of biological up-flow roughing filters designed for drinking water pretreatment in rural areas: using ceramic media as filter material

ABSTRACT Roughing filters have been successfully employed as a pretreatment method in rural water supply, but few studies have reported the performance of up-flow roughing filters (URFs) packed with ceramic media. In this study, two pilot-scale URFs filled with ceramic media were designed. Filter performance, height profiles and head loss development were fully investigated. The average DOC, UV254 absorbance, NH4+-N and total bacterial counts removal efficiencies of filters were found to be close to 8%, 10%, 70% and 0.6 log (75%), respectively. Both filters could remove about 60–90% of turbidity with influent turbidity ranging from 1 to 500 NTU and high removal efficiencies (∼60%) were achieved when influent turbidity was lower than 2.5 NTU at a hydraulic load up to 2 m h−1. Height profiles revealed that UV254 absorbance, NH4+-N and turbidity were primarily removed in the former part of filter columns and that the separated solids stored within 20 cm of ceramic media layer above the bottom contributed to over 90% of total head loss. Filter run times were estimated to be around 60–80 days with a maximum head loss of 30 cm and an average influent turbidity of 10 NTU. The results indicated that the two URFs, combining low-cost operation and simple maintenance with good performance, were well suited to small waterworks in rural areas. GRAPHICAL ABSTRACT

[1]  K. Murphy,et al.  Partial renewal of granular activated carbon biofilters for improved drinking water treatment , 2018 .

[2]  G. Gagnon,et al.  Water quality and filter performance of nutrient-, oxidant- and media-enhanced drinking water biofilters , 2017 .

[3]  V. Ratna Reddy.  Review of the book Rural water systems for multiple uses and livelihood security , 2016 .

[4]  Chuanping Feng,et al.  The feasibility of an up-flow partially aerated biological filter (U-PABF) for nitrogen and COD removal from domestic wastewater. , 2016, Bioresource technology.

[5]  R. Nabizadeh,et al.  Nitrogen and phosphorous removal from aerated lagoon effluent using horizontal roughing filter (HRF) , 2016 .

[6]  I. Delpla,et al.  Investigating social inequalities in exposure to drinking water contaminants in rural areas. , 2015, Environmental pollution.

[7]  F. Atabi,et al.  Efficiency of Horizontal Roughing Filter in Removing Nitrate, Phosphate and Chemical Oxygen Demand from Effluent of Waste Stabilization Pond , 2015 .

[8]  C. Faur,et al.  A new silver based composite material for SPA water disinfection. , 2014, Water research.

[9]  F. Meng,et al.  Identifying the sources and fate of anthropogenically impacted dissolved organic matter (DOM) in urbanized rivers. , 2013, Water research.

[10]  M. N. Adlan,et al.  OPERATIONAL PERFORMANCE OF VERTICAL UPFLOW ROUGHING FILTER FOR PRE-TREATMENT OF LEACHATE USING LIMESTONE FILTER MEDIA , 2013 .

[11]  Zahiruddin Khan,et al.  Comparing plain and coagulated horizontal flow roughing filtration for high turbidity water , 2013 .

[12]  Rebecca A. Trenholm,et al.  Development of surrogate correlation models to predict trace organic contaminant oxidation and microbial inactivation during ozonation. , 2012, Water research.

[13]  Zahiruddin Khan,et al.  Roughing filtration as an effective pre-treatment system for high turbidity water. , 2011, Water science and technology : a journal of the International Association on Water Pollution Research.

[14]  O. A. Olufayo,et al.  Turbidity Removal: Gravel and Charcoal as Roughing Filtration Media , 2010 .

[15]  Caradee Y. Wright,et al.  Developing a South African pedestrian environment assessment tool : Tshwane case study , 2010 .

[16]  M. Hassellöv,et al.  Size and composition of colloidal organic matter and trace elements in the Mississippi River, Pearl River and the northern Gulf of Mexico, as characterized by flow field-flow fractionation , 2010 .

[17]  T. Clasen,et al.  Estimating the scope of household water treatment in low- and medium-income countries. , 2010, The American journal of tropical medicine and hygiene.

[18]  W. B. Anderson,et al.  Influence of design and operating conditions on the removal of MS2 bacteriophage by pilot-scale multistage slow sand filtration , 2009 .

[19]  M. Jekel,et al.  Assessing the performance of biological filtration as pretreatment to low pressure membranes for drinking water. , 2009, Environmental science & technology.

[20]  P. Pavelic,et al.  A new method to evaluate polydisperse kaolinite clay particle removal in roughing filtration using colloid filtration theory. , 2008, Water research.

[21]  F. A. O. Otieno,et al.  Verification of Wegelin's design criteria for horizontal flow roughing filters (HRFs) with alternative filter material , 2007 .

[22]  T. Nasrabadi,et al.  Use of horizontal flow roughing filtration in drinking water treatment , 2007 .

[23]  H. Ahn,et al.  Modeling of Particle Removal in the First Coarse Media of Direct Horizontal-Flow Roughing Filtration , 2007, Environmental technology.

[24]  V. Pacini,et al.  Removal of iron and manganese using biological roughing up flow filtration technology. , 2005, Water research.

[25]  T. Stephenson,et al.  The effects of media size on the performance of biological aerated filters. , 2001, Water research.

[26]  F. Fdz-Polanco,et al.  Spatial distribution of heterotrophs and nitrifiers in a submerged biofilter for nitrification , 2000 .

[27]  Gamila H. Ali,et al.  Evaluation of Roughing and Slow Sand Filters for Water Treatment , 2000 .

[28]  L. Roberts,et al.  Water distribution system and diarrheal disease transmission: a case study in Uzbekistan. , 1998, The American journal of tropical medicine and hygiene.

[29]  Seung‐Hwan Lee,et al.  Performance evaluation of horizontal flow roughing filter as a pretreatment system , 1998 .

[30]  B. Rittmann,et al.  Evaluation of multiple-species biofilm and floc processes using a simplified aggregate model , 1994 .

[31]  Vernon L. Snoeyink,et al.  Achieving Biologically Stable Drinking Water , 1984 .

[32]  R. Summers,et al.  Biodegradable organic matter and rapid-rate biofilter performance: A review. , 2018, Water research.

[33]  S. Bandyopadhyay.  Sustainable Access to Treated Drinking Water in Rural India , 2016 .

[34]  L. A. Desimone.  Quality of Water from Domestic Wells in Principal Aquifers of the United States, 1991-2004 , 2009 .

[35]  L. Qiang.  Pollutant Removal Efficiencies by Up-flow Biological Aerated Filter along Height of Filter Media Layer , 2009 .

[36]  Adebayo S. Adekunle,et al.  Impacts Of Industrial Effluent On Quality Of Well Water Within Asa Dam Industrial Estate, Ilorin Nigeria , 2008 .

[37]  Wu Tong-jun.  Investigation of Drinking-water Status and Environmental Sanitation in Ruial Aieas of AnHui Province , 2008 .

[38]  Yorgos Kapranis.  Design of an emergency portable roughing filter using polystyrene beads as media , 1999 .

[39]  B. Reed,et al.  Roughing filtration with polystyrene beads , 1998 .

[40]  Martin Wegelin,et al.  Up-flow roughing filtration: Rehabilitation of a water treatment plant in Tarata, Bolivia , 1998 .

[41]  Martin Wegelin,et al.  Surface Water Treatment by Roughing Filters: A Design, Construction and Operation Manual , 1996 .