processing and recovery is a key functional element in municipal solid waste management system (mswms). reuse, recycle and recovery of valuable components of waste stream are given much attention in mswms in both developed and developing countries. the main concern of municipalities is the sound management of recyclable materials. source separation as a best practice for management of trash and...

Many industrial processes, particularly in the food industry, produce slurries or wastewaters containing high concentrations of biodegradable organic materials. Before these contaminated wastewaters can be discharged the concentration of the biodegradable organic pollutant must be reduced. One way to do this is to pass the wastewater through a bioreactor containing biomass which grows through c...

In order to recycle nitrogen from nitrogen-rich waste streams, particularly protein waste, we studied the decarboxylation of pyroglutamic acid and glutamic acid in a one-pot reaction to bio-based 2-pyrrolidone. After the screening of a wide range of supported Pd and Pt catalysts, 5 wt% Pd/Al2O3 displayed the highest yield (70%) and selectivity (81%) for the decarboxylation of pyroglutamic acid ...

background: production of solid waste is the result of the human’s different activities that today has changed a lot in comparison to the past due to the changing life styles and pervasive expansion. in isfahan province lots of wastes are produced daily. due to the importance of the waste and its recycling, the purpose is determining the production scopes of different wastes in order to find a ...

Polylactic acid (PLA) is one of the most used materials in FDM 3D Printing. Large-scale consumption PLA on an industrial scale could cause environmental and efficiency problems. Thus, waste industry need to be recycled limit excessive waste. This study aimed investigate change mechanical property, morphology, structure mechanically PLA. Recycling was performed 12 times using extrusion process w...

What makes recycling work? We study the factors driving household waste disposal and recycling in 18 cities in Taiwan and Japan in order to understand the impact of alternative waste management incentives. We show that this depends on the effect of distinct policies on the relative costs of the main alternative disposal methods: recycling, disposal to landfill and illegal dumping. The willingne...

Three potential detrimental effects of lunar 3He mining have been identified; visual changes, atmospheric contamination, and solid waste disposal. The removal of small craters (<20 m diameter) and the change in the albedo of the surface may cause a slight darkening of the regolith. However, it is not expected that this change will be visible from the Earth even with powerful telescopes. The rel...

It has recently been estimated that 72 million tonnes of Construction and Demolition (C&D) waste arose in 1999 in England and Wales accounting for approximately 20% of total waste arisings. Of this 35% is estimated to be recycled. Improving the efficiency of the construction and demolition industry is a key objective for the UK Government, with the publication of a strategy for more sustainable...