Substances may enter the economy and the environment through both intentional and non-intentional flows. These non-intentional flows, including the occurrence of substances as pollutants in mixed primary resources (metal ores, phosphate ores and fossil fuels) and their presence in re-used waste streams from intentional use may have environmental and economic consequences in terms of pollution a...

The source of all liquid, gaseous and solid radioactive waste in the pressure water reactor (PWR) nuclear power plant (NPP) originate from leakage of fission products out of the fuel rods into the primary coolant and neutron activation of materials within and around the primary coolant system and reactor vessel. The source term design used to determine the concentrations of radionuclides in the...

Trace metals are intrinsic, natural constituents of our environment. Apart from the natural sources, several anthropogenic ones also contribute to metal concentrations in the environment. Some of the anthropogenic sources of the metals in the environment are: mining, smelting, production and use of the compounds and materials containing the metals, burning of fossil fuels, waste dumping and lea...

Biogas production represents a fascinating process for the recovery of nutrients and renewable energy from various organic waste streams. The process is of interest for the production of value-added chemicals by mixed cultures and can also be applied in combined bioenergy production systems. Strategies and opportunities for optimization of biogas quality and quantity are presented.

The meeting of phosphorus recycling organised in the frame of the ANR Phosph’OR research project by MidiPyrénées Innovation brought together scientists, industry, water companies and agricultural organisations to exchange on perspectives for recovery of phosphorus from waste streams, and market and agronomic criteria for distribution and reuse of recycled phosphorus as fertilisers according to ...

A new water recovery system architecture designed to fulfill the National Aeronautics and Space Administration’s (NASA) Space Exploration Policy has been tested at the Marshall Space Flight Center (MSFC). This water recovery system architecture evolved from the current state-of-the-art system developed for the International Space Station (ISS). Through novel integration of proven technologies f...

Various approaches to solvent recovery have been studied for the manufacturing process of celecoxib, the active ingredient in Celebrex. A design case study has been performed by Rowan University with Pfizer through a green engineering partnership program. The manufacturing operation at Barceloneta, Puerto Rico was evaluated and several green engineering alternatives for the purification and rec...

As manufacturing industries become more cognizant of the ecological effects that their firms have on the surrounding environment, their waste streams are increasingly becoming viewed not as materials in need of disposal, but rather as resources that can be reused, recycled, or reprocessed into valuable products. Within the food processing sector there are many examples of value-added use of pro...

www.aana.com/aanajournalonline The goal of this project was to optimally sort waste material in the operating room (OR) environment and divert waste such that streams of low-cost disposal, including recyclable material, could be maximized. Using the Lean Six Sigma method, we followed 5 steps to define, measure, analyze, improve, and control. Descriptive statistics were used to describe OR chara...

The authors introduced waste plastic pyrolysis oil (WPPO) as an alternative fuel characterized in detail and compared with conventional diesel. High density polyethylene, HDPE, was pyrolyzed in a self-designed stainless steel laboratory reactor to produce useful fuel products. HDPE waste was completely pyrolyzed at 330-490°C for 2-3 hours to obtain solid residue, liquid fuel oil, and flammable ...