Birgir Norddahl

TL;DR: This review presents a critical analysis of the current status of research in enzymatic biodiesel production and accentuates the main obstacles to the widespread use of enzymes for commercial biodiesel transesterification.

TL;DR: The levels of hydrogenotrophic methanogens of the order of Methanomicrobiales increased during decreased reactor performance suggesting that syntrophic interactions involving hydrogenotrophic methanogen remained intact regardless of the degree of shear in the AnMBR.

TL;DR: Process simulation and economical evaluation of an enzymatic biodiesel production plant has been carried out and the cosolvent production process is found to be most expensive and is not a viable choice, while the solvent free process is viable for the larger scale production.

TL;DR: In this article, the authors discuss ammonium fertilizer recovery from manure using membrane processes and physicochemical methods including technology and energy assessments, which rely highly on selection of appropriate pretreatment, as residual particulates will lead to fouling of membranes and stripping towers hence affect the performance greatly.

TL;DR: It is concluded that membrane fouling is dominated by organic fouling in combination with deposits of inorganic elements and microorganisms, which indicates that fouling could be a severe problem for membrane distillation performance.