Environmental Engineering CIVL 241 HAZARDOUS WASTE HAZARDOUS WASTE

Environmental Engineering CIVL 241 HAZARDOUS WASTE

HAZARDOUS WASTE Definition of Hazardous Waste The term “Hazardous Waste ” means any substance that cause potential hazard to human health and the environment when improperly treated, transported, disposed or managed.

HAZARDOUS WASTE Characteristics of Hazardous Waste Ignitability If the waste has any of the following properties: 1 - it is a liquid has a flash point less than 60 o. C 2 - it is not a liquid but under standard temperature can cause fire through friction and create hazard, 3 - it is a compressed gas.

HAZARDOUS WASTE Characteristics of Hazardous Waste Corrosively If the waste has any of the following properties: 1 - it is Aqueous with 2. 0 ≥ p. H ≥ 12. 5 2 - it is a Liquid that corrodes steel at a rate of 6. 35 mm or more per year

HAZARDOUS WASTE Reactivity if the waste has any of the following properties: 1 - it reacts violently when mixed with water 2 - it forms potentially explosive mixture with water 3 - when it mix with water generate toxic gases which is danger to human health

HAZARDOUS WASTE Toxicity is a measure of the degree to which something is toxic or poisonous. Waste is considered a hazardous waste if any of the drinking water maximum contaminant levels (MCL) are exceeded. LD 50 standing for “lethal does” which is a concentration measure for a toxin at which fifty percent of the members of an exposed population dies from exposure.

HAZARDOUS WASTE Hazardous waste management priorities in managing hazard waste are: 1 - Reduce the amount of hazardous wastes generated at the first place. 2 - Recycle metal and energy content which are contained in hazardous waste. 3 - Reduce the volume of wastes sludge generated by dewatering. 4 - Destroy combustible hazardous waste in special high temperature incinerators.

HAZARDOUS WASTE Hazardous waste management priorities in managing hazard waste are: 5 - Dispose the remaining wastes in specially designed landfills.

HAZARDOUS WASTE Hazardous waste management in general, the procedure for the implementation of pollution prevention activities is to: - Recognize a need Assess the problem Evaluate the alternatives Implement the solutions

HAZARDOUS WASTE Hazardous waste management waste minimization The key elements necessary to the success of waste minimization are: 1 - Top level organization commitment 2 - Financial resources 3 - Technical resources. 4 - Appropriate organization goals and strategy.