Publication detail

Tertiary Treatment of Wastewater by Phosphorus Precipitation – Pilot Scale Test of Flotation Utilization for Suspension Separation

HOUDKOVÁ, L. ČMARADOVÁ, M. STRNADEL, P. CHLÁDKOVÁ, H. BORÁŇ, J.

Original Title

Tertiary Treatment of Wastewater by Phosphorus Precipitation – Pilot Scale Test of Flotation Utilization for Suspension Separation

Type

conference paper

Language

English

Original Abstract

A research published in this paper is focused on a phosphorus removal from municipal wastewater. A technology consisting of chemical precipitation and flotation was tested to simulate a tertiary stage of wastewater treatment plant. Biologically treated wastewater with a very low concentration of total phosphorus (approx. 1.2 mg/L) was used. The ferric sulphate solution was used as a precipitant. The precipitate was removed by dissolved air flotation which took place in a pilot scale flotation unit Kunst-i-flot. This is an experimental device that was designed for thickening of sewage sludge (inlet pump flow ranges from 0.7 to 5.0 m3/h). The target of the experiments was to determine whether this technology is applicable in case of low inlet concentration of total phosphorus in the wastewater. The influence of the ratio Fe3+/P, the amount of air used for flotation and the hydraulic retention time in the tank for slow mixing were studied. The significant influence of ratio Fe3+/P was proved, while increasing of air fed in flotation unit had no positive effect. It was found an optimum dose of ferric sulphate solution approx. 2 g Fe3+/g P. The phosphorus removal efficiency was 50 %. Increasing of ferric sulphate dose did not decrease the phosphorus concentration in wastewater effluent, which was usually approx. 0.4 mg/L and higher.

Keywords

wastewater treatment, phosporus removal, DAF

Authors

HOUDKOVÁ, L.; ČMARADOVÁ, M.; STRNADEL, P.; CHLÁDKOVÁ, H.; BORÁŇ, J.

RIV year

2014

Released

23. 8. 2014

Publisher

Aidic Servizi S.r.l.

Location

Milan, Italy

ISBN

978-88-95608-30-3

Book

Proceedings of the 17th CONFERENCE ON PROCESS INTEGRATION, MODELLING AND OPTIMISATION FOR ENERGY SAVING AND POLLUTION REDUCTION PRES 2014

ISBN

2283-9216

Periodical

Chemical Engineering Transactions

Year of study

39

State

Republic of Italy

Pages from

1243

Pages to

1248

Pages count

6

BibTex

@inproceedings{BUT109228,
  author="Lucie {Houdková} and Miroslava {Čmaradová} and Petr {Strnadel} and Helena {Chládková} and Jaroslav {Boráň}",
  title="Tertiary Treatment of Wastewater by Phosphorus Precipitation – Pilot Scale Test of Flotation Utilization for Suspension Separation",
  booktitle="Proceedings of the 17th CONFERENCE ON PROCESS INTEGRATION, MODELLING AND OPTIMISATION FOR ENERGY SAVING AND POLLUTION REDUCTION PRES 2014",
  year="2014",
  journal="Chemical Engineering Transactions",
  volume="39",
  pages="1243--1248",
  publisher="Aidic Servizi S.r.l.",
  address="Milan, Italy",
  doi="10.3303/CET1439208",
  isbn="978-88-95608-30-3",
  issn="2283-9216"
}