Monitoring Septage Addition to Wastewater Treatment Plants. Volume I. Addition to the Liquid Stream

摘要

The report provides information needed to facilitate septage disposal at municipal wastewater treatment plants. Research assessed the effects of septage addition to primary and secondary biological waste treatment processes. Septage was added to an extended aeration process, a two-stage conventional activated sludge process, and a pilot plant operated both as an extended aeration and a conventional activated sludge facility. All processes were monitored during a no-septage feed baseline period, which was followed by constant feed and slug feed. Results included process loading for existing plants, design criteria for new facilities and cost of treatment of septage. Experience gained in feeding and treating large quantities of septage is reported. Septage is readily treated biologically with domestic sewage. The organic and solids content of septage averages about 50 times that of domestic sewage. Solids removal in primary clarification is excellent and in combination with primary or secondary sludge, septage dewaters well.