Contents [Environment Protection Engineering. Vol. 38, 2012, nr 4]

4/2012

environment

protection

engineering

published quarterly

Founding Editor

T

W

Editor-in-Chief

K

M

-N

Vice-Editors

Jerzy Z

, Lucjan P

Assistant Editor

I

K

Editorial Office

Faculty of Environmental Engineering

Wrocław University of Technology

Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland

Publisher

Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

Oficyna Wydawnicza Politechniki Wrocławskiej

Wybrzeże Wyspiańskiego 27, 50-370 Wrocław

http://www.oficyna.pwr.wroc.pl, e-mail: oficwyd@pwr.wroc.pl

© Copyright by Oficyna Wydawnicza Politechniki Wrocławskiej, Wrocław 2012

CONTENTS

A. ASSADI,M.H.DEHGHANI,N.RASTKARI,S.NASSERI,A.H.MAHVI,Photocatalytic reduction of

hexavalent chromium in aqueous solutions with zinc oxide nanoparticles and hydrogen per-oxide ... 5 M. ZIELIŃSKA,K.BERNAT,D.KULIKOWSKA,A.CYDZIK-KWIATKOWSKA,I.WOJNOWSKA-BARYŁA,

Activated sludge activity in the treatment of anaerobic sludge digester supernatant ... 17 A. KRÓL, Durability of stabilised galvanic sewage sludge against the impact of sea water and

sulfate solutions ... 29 B. O.BOLAJI,Z.HUAN,Computational analysis of the performance of ozone-friendly R22

alterna-tive refrigerants in vapour compression air-conditioning systems ... 41 M. ABATAL,M.T.OLGUIN, Evaluating of effectiveness of a natural and modified surface Mexican

clinoptilolite-rich tuff in removing phenol and p-nitrophenol from aqueous solutions ... 53 H. XU,D.-J.CAO,Z.-F.TIAN, Isolation and identification of a mercury resistant strain ... 67 S. H.SHIM,S.H.JEONG,K.-Y.KIM,S.-S.LEE,Speciation of mercury in coal and sludge

combus-tion flue gases ... 77 Q. XIE,X.DONG,W.HUANG,H.XU,H.DU, Reaction kinetics and thiourea removal by ozone

oxidation ... 87 D.SŁYŚ, A.STEC,Hydrodynamic modelling of the combined sewage system for the city of

Przemyśl ... 99 T. BACZYŃSKI, Influence of process parameters on anaerobic biodegradation of DDT in

contami-nated soil preliminary lab-scale study. Part I. Surfactant and initial contamination level ... 113 B. KAŹMIERCZAK,A.KOTOWSKI, Depth-duration-frequency rainfall model for dimensioning and

modelling of Wrocław drainage systems ... 127 S. B. TAVAKOLY SANY, A. SALLEH, A. HALIM SULAIMAN, A. SASEKUMAR, G. TEHRANI,

M. REZAYI,Distribution characteristics and ecological risk of heavy metals in surface sedi-ments of West Port, Malaysia ... 139 M. LEBIOCKA,A.PIOTROWICZ, Co-digestion of sewage sludge and organic fraction of municipal

solid waste. A comparison between laboratory and technical scales ... 157 A. M.DZIUBEK, Some of the problems concomitant with the removal of nitrogen compounds in

Poland ... 163 I. MIHAJLOVIC,N.ŠTRBAC,P.ĐORĐEVIĆ,A.MITOVSKI,Đ.NIKOLIĆ,Ž.ŽIVKOVIĆ, Optimum