Download WHO Monographs on Selected Medicinal Plants Free Book

Volume 2 of the WHO Monographs on Selected Medicinal Plants provides an additional collection of 30 monographs covering the quality control and traditional and clinical uses of selected medicinal plants approved by 120 experts in more than 50 countries. The monographs are intended to promote international harmonization in the quality control and use of herbal…

Download Biological Nutrient Removal (BNR) Operation in Wastewater Treatment Plants, WEF Manual of Practice Free Book

BNR is a fast-growing method of removing biological pollutants (bacteria, etc.) from wastewater. Experts from both the Water Environment Federation and the American Society of Civil Engineers have collaborated on this definitive work which is intended to be a practical manual for plant managers and operators who needed current information on BNR.