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Submitted on: 18 January 2006.
Revised on: 18 May 2006.
Accepted on: 13 July 2006.
___________________ECOLOGICAL ENGINEERING---ELSEVIER
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Submitted on: 24 May 2015.
Revised on: 19 July 2015.
Accepted on: 30 August 2015.
___________________ECOLOGICAL ENGINEERING---ELSEVIER
Submitted on: 27 September 2017.
Revised on: 06 November 2017.
Accepted on: 16 November 2017.
___________________ECOLOGICAL ENGINEERING---ELSEVIER
Submitted on: 20 April 2007.
Revised on: 28 June 2007.
Accepted on: 12 August 2007.
___________________ECOLOGICAL ENGINEERING---ELSEVIER