%0 Journal Article %T Application of factorial design to analyse the effect of brick powder size on biogas purification results %A Wahyudi, Slamet %A Lais, Abu %A Bintarto, Redi %J IOP Conference Series: Materials Science and Engineering %V 1034 %N 1 %P 10 %@ 1757-8981 %D 2021-03-18 %~ DeepDyve