Open AccessEXPERIMENTAL INVESTIGATION OF SUBSTANCE CONCENTRATION CHANGES WHEN FILTERING WATER WITH FILTERS
Author(s) -
Aušra Šaltenienė,
Olegas Prentkovskis
Publication year - 2004
Publication title -
journal of environmental engineering and landscape management
Language(s) - English
Resource type - Journals
eISSN - 1822-4199
pISSN - 1648-6897
DOI - 10.3846/16486897.2004.9636820
Subject(s) - manganese , filtration (mathematics) , groundwater , water quality , filter (signal processing) , reagent , environmental science , environmental engineering , aeration , chemistry , ammonium , water treatment , environmental chemistry , mathematics , geology , engineering , geotechnical engineering , statistics , organic chemistry , electrical engineering , ecology , biology
This study presents non‐reagent groundwater removal technology at precipitation of substances (iron, ammonium and manganese) in sand filters of an experimental pilot plant (Fig 1). For experimental investigation the ground‐water of Pagiriai watering place (Kirtimai watering place junctions) in Vilnius city was chosen. The ground water from this watering place does not meet the requirements of a satisfactory‐quality class due to high concentrations of iron and manganese. Experiments were carried out from Aug 13 to Oct 15 of 2003 with the aim of removing iron, ammonium and manganese from groundwater subject to the depth of filters and rate of filtration. Groundwater was aerated and filtered through three experimental filters at a rate of 10, 15 and 20 m/h. The results of the investigation show that the concentrations of studied substances subject to the depth of filters are reduced. The investigated process of iron, ammonium and manganese removal at the filtration rate of 10 m/h ensures water quality that meets the requirements for a very high‐quality class. Filtration of aerated water through filter 2 at 20 m/h rate does not ensure the concentration of manganese in the outlet less than 0,03 mg/1. If sand media is not enough unriped for manganese removal (filter 3), the concentration of manganese in the outlet does not ensure a good drinking‐water quality class. For the mathematical description of changes in average substance concentrations at typical points polynomials were used. In conformity with this description it is possible to determine variation in concentrations of studied substances (iron, ammonium, manganese) at characteristic points in the filter medium.