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Type of publication: research article
Type of publication (PDB): Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Aplinkos inžinerija / Environmental engineering (T004)
Author(s): Gasiūnas, Valerijus;Aškinis, Simanas
Title: Additional removal of phosphorus using coagulant by purification of wastewater in sand filters
Is part of: Research for rural development 2011 : annual 17th international scientific conference proceedings, Jelgava, Latvia. Jelgava : Latvia University of Agriculture, 2011, no. 2
Extent: p. 146-151
Date: 2011
Keywords: Phosphorus removal;Constructed wetlands;Coagulation;Polyaluminium chloride
Abstract: The aim of the study was to examine the effect of coagulant PAX - 18 (polyaluminum chloride) on additional phosphorus in reed sand filters. Batch experiments for precipitation reaction with wastewater from septic tank and after treatment in the reed filter were carried out. The doses of coagulant under 200 mg L and time of coagulation under 72 h were applied. Coagulant PAX - 18 efficiently removes phosphorus from the wastewater. The efficacy of removal depends on the dose of c and the time of coagulation. Optimal hydraulic retention time is about 40 hours. With regard to the consumption of coagulant to remove 1 mg of P, it is most efficient to apply coagulant before wastewater ere in the filter. During the coagulation time of 40 hours, 1 milligram of aluminium oxide precipitated 0.23 mg of P in the wastewater from the filter and 0.39 mg in the wastewater from the septic tank. In this case the removal of P was 1.65 times more effective. Coagulant decreases the wastewater pollution according to BOD. and the concentration of suspended solids. Therefore, it is advisable to use the coagulant before wastewater treatment in the filter, as it reduces the organic load of filters and the possttl filter clogging due to lower concentration of suspended solids
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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