Effects Of Contaminants On Wastewater Treatment Plants

As a final example of wastewater discharge effects, industrial wastewater can affect wastewater treatment plants if such wastewater is introduced into municipal sewerage systems. The pollution characteristics of industrial wastewater with definable effects on sewers and treatment plants include

3. floating and colored material

4. volume

5. other harmful constituents

Excessive BOD and volume can cause organic and hydraulic overloads, respectively. SS can create operational problems due to excess solids and sludge production. Floating and colored material are related to visible pollution. Examples of other harmful industrial wastewater constituents include (Nemerow and Dasgupta 1991):

Toxic metal ions (Cu++, Cr+6, Zn++, and Cn"), which interfere with biological oxidation by tying up the enzymes required to oxidize organic matter Acids and alkalis, which can corrode pipes, pumps, and treatment units, interfere with settling, upset the bio-

Human Intervention With The Environment
FIG. 7.2.7 The biogeochemical cycle for nitrogen. Dotted lines denote human intervention. (Reprinted, with permission, from D. Drew, 1983, Man-environment processes, London: George Allen and Unwin, Ltd.)
Nitrogen Cycle Drew

sediments

FIG. 7.2.8 The biogeochemical cycle for mercury. Special reference is given to the biological concentration in the aquatic environment. Broken lines show areas of human intervention. (Reprinted, with permission, from Drew, 1983.)

sediments

FIG. 7.2.8 The biogeochemical cycle for mercury. Special reference is given to the biological concentration in the aquatic environment. Broken lines show areas of human intervention. (Reprinted, with permission, from Drew, 1983.)

logical purification of sewage, release odors, and intensify color

Detergents, which cause foaming of aeration units Phenols and other toxic organic material

Healthy Chemistry For Optimal Health

Healthy Chemistry For Optimal Health

Thousands Have Used Chemicals To Improve Their Medical Condition. This Book Is one Of The Most Valuable Resources In The World When It Comes To Chemicals. Not All Chemicals Are Harmful For Your Body – Find Out Those That Helps To Maintain Your Health.

Get My Free Ebook


Post a comment