2Water is an integral part of our daily lives We are made up of waterWe need water to drink, clean, and grow foodThe average American uses 176 gallons of water dailyThat amounts to a lot of wastewater...
3What is wastewater? Used water The water that goes down our drains contains human waste, food, oils, soaps, and chemicalsWater used by homes, industries, and businesses must be treated before it is released back into the environment
4Solution?Treatment plants reduce pollutants in wastewater to a manageable level
5The ProcessThe goal: remove as much solids as possible before remaining water discharged back into environmentPrimary treatment: removes 60% of solidsSecondary treatment: removes more than 90% of solids
6Why treat wastewater?Plants and animals that live in or near water need clean water to surviveQuality of LifeHealth
7Problem: AmmoniaWidely used as a cleaning agent in domestic and industrial processesEnds up in wastewater and must be treatedIt's difficult to remove it all!
8What is Ammonia?One of the most commonly produced industrial chemical in the USToxic at high levels!Death of animals, birds, fish, plants
9Effects on the Environment EutrophicationBuildup of nutrients in water = more plant growth = less oxygen in the waterDeath of aquatic lifeChanges in EcosystemsWeeds may outcompete native plantsMay lead to extinction of native or weaker species
10Effects on the Environment When ammonia combines with emissions from factories or cars, they form particles that contribute to smogSmog leads to an increased rate of respiratory and heart diseases