Discuss the physical and chemical characteristics of sludge and other solids produced during waste-water treatment operation

1. Discuss the physical and chemical characteristics of sludge and other solids produced during waste-water treatment operations. Be sure and provide additional focus on digested primary sludge and anticipated heavy metal content in sludge.
2. Discuss the reason for creating cake in the system. Be sure and discuss the concepts of sludge conditioning as a means of total solids removal from the waste stream.

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