Sludge dewatering and treatment may cost as much as the wastewater treatment. Usually large proportion of the pollutants in wastewater is organic. They are attacked by saprophytic microorganisms, i.e. organisms that feed upon dead organic matter. Activity of organisms causes decomposition of organic matter and destroys them, where the bacteria convert the organic matter or other constituents in...

In this paper, we present the ZenRobotics Recycler, a system that sorts construction and demolition (CND) waste by picking valuable objects from a conveyor belt using robotic hands. It is the first CND recycling system that reaches a useful purity of wood, stone, and metal without resorting to human sorters. We describe how we applied machine learning to solve some of the key problems such as r...

In order to avoid the potentially devastating consequences of global warming and climate change, the carbon dioxide “CO2” emissions caused due to anthropogenic activities must be reduced considerably. This paper presents the first study examining the feasibility of carbon sequestration in construction and demolition “C&D” waste. Experiments were carried out in a self fabricated Batch Reactor at...

Waste management in the building industry in Hong Kong has become an important environmental issue. Particularly, an increasing amount of construction and demolition (C&D) waste is being disposed at landfill sites. In order to reduce waste generation and encourage reuse and recycling, the Hong Kong Government has implemented the Construction Waste Disposal Charging Scheme (CWDCS) to levy charge...

The Zambian Construction Industry (ZCI) is one of the fastest growing sectors in Zambia arising from increased infrastructure development. ZCI, like elsewhere, composed many players including designers, contractors, regulators, manufacturers and suppliers construction materials. country has seen an upsurge Demolition Waste (CDW) generation due to activities. However, opportunities for utilizing...