|  | CABEQ 31 (2) (2017) 131-185 | 

| Editorial | 
| Biocatalytic Process Design and Reaction Engineering   R. Wohlgemuth | 131-138 | 
| Investigation of H2S and CO2 Removal from Gas Streams Using Hollow Fiber Membrane Gas–liquid Contactors  S. M. Mirfendereski and  T. Mohammadi | 139-144 | 
| Comparison of Hexane Vapour Permeation in Two Different Polymeric Membranes via an Innovative In-line FID Detection Method  Z. Petrusová,  L. Morávková,  J. Vejražka,  Z. Vajglová,  J. C.  Jansen and  P. Izák | 145-160 | 
| Removal of Selected Organochlorine Compounds by Ozone-based Processes  K. Šimkovič,  J. Derco,  J. . Dudáš and  B. Urminská | 161-165 | 
| Influence oFe3+ Ions on Nitrate Removal by Autotrophic Denitrification Using Thiobacillus denitrificans  Z. Blažková,  V. Trousil,  E. Slehová,  J. Palarčík,  M. Slezák and  J. Cakl | 167-172 | 
| Removal of Alkylphenols from Industrial and Municipal Wastewater  J. Derco,  J. . Dudáš,  M. Valičková,  L. Sumegová and  S. Murínová | 173-178 | 
| Biological Nutrient Removal in an Intermittently Aerated Bioreactor  J. Derco,  B. Urminská,  A. Kovács and  K. Šimkovič | 179-185 |