title: Pollutant sources and flows in a municipal sewage system.
abstract: The flow of heavy metals (Cu, Ni, Cr, Cd, Zn, Pb) and cyanide in the Kokomo, Indiana collection system and wastewater treatment plant is analyzed. The primary objective is to determine the relative contributions of domestic and non-domestic sources to the total pollutant load in the system, and to assess the levels of discharge control required for the disposal of municipal sludge by landfill or agricultural landspreading. Sampling was conducted at point source locations, in major sewer trunk-and feeder lines, and at the treatment plant. Production and waste treatment data are presented for point sources sampled for the purpose of characterizing metal and cyanide discharges as a function of these parameters. A heavy metal mass balance is attempted for the treatment plant. Metal removal factors are presented for various plant operations.A simple statistical approach is presented for the design of a cost-effective sampling program for correlating point source and trunkline pollutant sampling. The purpose is to minimize the amount of sampling required to account for pollutants seen in trunkline and treatment plant streams in terms of discharges from specific point sources.
authors.affiliation: School of Health Sciences, Pharmacy Building, Rm. 322, Purdue University, 47907, West Lafayette, IN, USA.
authors.forename: K J
authors.initials: KJ
authors.lastname: Yost
authors.forename: R F
authors.initials: RF
authors.lastname: Wukasch