ethan kohlberg, the jewish orientalist and specialist on shi‘a, sees the distortion in holy scriptures, including quran, inevitable. from his point of view, some quranic verses confirm this point. his second proof is the history of the quran and the time when its whole text was written down. in his viewpoint,   hadiths which prove that the quran had been written down in abu bakr’s time ore orie...

the down-flow hanging sponge (dhs) reactor, which was developed for post-treatment of effluent from up-flow anaerobic sludge blanket (uasb) process treating sewage, uses polyurethane sponge as media to retain biomass. wastewater is trickled from the top of the reactor and purified by microorganisms retained both inside and outside of the sponge media as the wastewater flows vertically down thro...