List of Articles Fixed Bed Open Access Article Abstract Page Full-Text 1 - Performance of areation systems (activated sludge) with fixed bed for the treatment of wastewater with high organic load Amir Hesam Hassani Amir Hossein Javid Ali Torabian Seyed Morteza Hosseinian Amir Hayatbakhsh Open Access Article Abstract Page Full-Text 2 - Synthetic Analysis of Nitrogen and Phosphorous Removal from Municipal Wastewater Using Sequencing Batch Bio-film Reactor with Fixed Bed Mina Khosravi Amirhessam Hassani Mohamadreza Khani Kamyar Yaghmaeian Open Access Article Abstract Page Full-Text 3 - Investigation of fixed bed sequencing batch reactor for synthetic wastewater treatment Sahand Jorfi Mohammad mehdi Mehrbani Ardekani Kamyar Yaghmaeyan Open Access Article Abstract Page Full-Text 4 - Analysis of Environmental Impacts on the Characteristics of Gas Released from Biomass Reza Alayi Ehsan Sobhani Atabak Najafi 10.22034/ap.2020.1879800.1052 Open Access Article Abstract Page Full-Text 5 - Synthesis and efficiency of Co and Co-Ru nano catalyst based on graphene in Fischer-Tropsch process Miresmaeil Masumi Open Access Article Abstract Page Full-Text 6 - Collocated Discrete Least Squares Meshless (CDLSM) Method for Simulation of Mobile- Bed Dam Break Problems Babak Fazli Malidareh Seyed Abbas Hoseyni