ABSTRACT
Sewage ought to be collected and conveyed as soon as possible from the point of production to a treatment facility or an approved final disposal location with a minimum of cost. This chapter presents information dealing with the terminology used in the wastewater collection field, such as the classification of sewers, and the advantages and disadvantages of each of these systems. The methods used to estimate the design or peak wastewater flows including extraneous water entering the sewers due to infiltration and inflow are included. The chapter provides the reasons for treating wastewater and the classification and selection of treatment processes (physical, chemical, and biological). The basic principles involved in the design of grit chambers and a computer program are presented. Also discussed is the specific resistance test used to evaluate the dewatering characteristics of a sludge, which is accompanied by a computer program for determination of both specific resistance and the compressibility coefficient for sludge.
