Simultaneous ammonium and water recovery from landfill leachate using an integrated two-stage membrane distillation.

Resources recovery from landfill leachate (LFL) has been attracting growing attention instead of merely purifying the wastewater. An integrated two-stage membrane distillation (ITMD) was proposed to simultaneously purify LFL and recover ammonia in this study. The results showed that organics could be always effectively rejected by the ITMD regardless of varying feed pH, with COD removal higher than 99%.

[Studies on purification of total glycosides of paeony (TGP) from Paeonia lactiflora by ethanol gradient combined with resin processing].

Objective: To study the purification technology of TGP from Paeonia lactiflora by ethanol gradient combined with resin processing and determine the optimum technological conditions and parameters.

Methods: Using orthogonal test design to investigate the effect of ethanol gradient treatment on the content of TGP. Moreover, from the static and dynamic adsorption nine types of macroporous adsorption resin were evaluated to select the best resin type and the optimum separation and purification conditions.