* A company produces a range of solid and liquid wastes, both hazardous and non-hazardous. Identify and discuss the issues that should be addressed by the company when developing a system for the safe collection and deposal of the waste.
* Construction work is being undertaken on a multi-storey building. As part of these works, materials stored and used on-site include bricks, bags of cement, boxes, and large quantities of flammable substances.
a) Identify the hazards that workers could be exposed to during the work
b) Outline control measures for the safe stacking and storage of:
(i) Materials used on-site
(ii) Flammable substances ...view middle of the document...
Gas is pumped out of the landfill using perforated pipes and flared off or burnt in a gas engine to generate electricity.
The energy content of waste products can be harnessed directly by using them as a direct combustion fuel, or indirectly by processing them into another type of fuel. Thermal treatment ranges from using waste as a fuel source for cooking or heating and the use of the gas fuel Pyrolysis and gasification are two related forms of thermal treatment where waste materials are heated to high temperatures with limited oxygen availability. The process usually occurs in a sealed vessel under high pressure. Pyrolysis of solid waste converts the material into solid, liquid and gas products. The liquid and gas can be burnt to produce energy or refined into other chemical products
Recycling is a resource recovery practice that refers to the collection and reuse of waste materials such as empty beverage containers. The materials from which the items are made can be reprocessed into new products. The most common consumer products recycled include aluminium such as beverage cans, copper such as wire, steel food and aerosol cans, old steel furnishings or equipment, polyethylene and PET bottles, glass bottles and jars, paperboard cartons, newspapers, magazines and light paper, and corrugated fiberboard boxes.
Companies are encouraged to improve their environmental efficiencies each year by eliminating waste through resource recovery practices, which are sustainability-related activities. One way to do this is by shifting away from waste management to resource recovery practices like recycling materials such as glass, food scraps, paper and cardboard, plastic bottles and metal.
Recoverable materials that are organic in nature, such as plant material, food scraps, and paper products, can be recovered through composting and digestion processes to decompose the organic matter. The resulting organic material is then recycled as mulch or...