VOLUME 2 Post-Treatment, Reuse, and Disposal
1.5 Scope of This Book
The objective of this book is to present theory and design concepts of wastewater treatment and reuse. It is a consolidated resource of valuable quick-and-easy access to theory and design examples and step-by-step solutions for complete spectrum of wastewater treatment from fundamentals to advanced technology.
These numerical examples and solutions enhance the reader’s comprehension, deeper understanding of the basic concepts, and master the problem-solving techniques. The subject matter covered in this book includes reaction kinetics, mass balance and reactors; equalization; preliminary, primary, secondary treatment, BNR and advanced treatment; and effluent and biosolids reuse. It is expected that a cross-sec- tion of simple to advanced problem will benefit undergraduate and graduate students, researchers, educa- tors, and professionals.
Discussion Topics and Review Problems
1.1 What parameters are included in the national standard for secondary treatment and their maximum 30-day average allowable concentrations?
1.2 What is chronic toxicity and what class of compounds are associated by chronic toxicity? What are the health effects of many of these compounds resulting from long-term exposure?
1.3 With reference to chronic toxicity, define the following terms: biomonitoring, TRE, dose–response curve, NOAEL, LOAEL, and ADI.
1.4 Review Example (10.161), list the fractionation components of total nitrogen that is used in com- puter simulation.
1.5 What are the sources of sidestreams? If side streams are returned to the head of the plant, how will they change the influent quality to the plant? List the treatment processes commonly used to treat the sidestream.
1.6 Define infiltration and inflow (I/I). What is the normal I/I allowance for design of laterals and submains, and I/I allowance for mains and trunk sewers.
1.7 Describe anaerobic process and biogas generation. Based on rule of thumb, what is the rate of gas generation in m3per kg of volatile solids stabilized?
1.8 Review various treatment processes listed inTable 6.8. These processes are used for treatment of bulk liquid. Describe conventional activated sludge, trickling filter processes, and membrane bioreactor.
1.9 Review various treatment processes listed inTable 6.10. These processes are used for treatment of sludge. Describe gravity thickener and beltfilter press.
1.10 Define IPR and DPR. List your concerns about IPR as a water supply source in your community.
1.11 Review sections on Public Education and Public Involvement in Reference28As a concerned citizen, what actions would you take for watershed management to reduce contaminants from non- point source discharges?
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