Increasing the temperature wil reduce the dissolved oxygen which the fish are rely so temperature is not increased in water bodies.
Bottom Ash : falls to bottom of furnace, larger particles, heavier and it contains inorganic and organics that don’t burn.
Fly Ash : Lighter by weight, smaller particles that “fly” up in the air and can be captured by air[pollution control equipment.
Ashi is 25% by weight and 5% by volume of the original waste.
Thus, combustion reduced waste mass by 75 and volume by 95%.
Problem with ash :
It disposal and potential environment contamination.
Test for determining whether metals leaching is a problem.
LEAF : Leaching Environmental Assessment Framework.
Concentration of leached metals is 100x drinking water, ash is classified as hazardous waste.
Fly ash is often a hazardous waste; bottom ash is not.
Mixture : Non-hazardous.
Reduce metals leaching : use as n building blocks, add lime or limestone to raise pH so metals is in insoluble form,
Beneficial ways to reuse ash:
· Road base, asphalt concrete, Portland cement concrete
· Capping Strip mines
Air pollution Control Technologies …..(copy) i
Sustainability : what does it mean to engineer :
Remember three pillars for sustaninability which is People, Planet and profit.