Production of exceptional quality biosolids (class a +) at City of los Angeles’s wastewater plants

Abstract

This paper is in two parts. Part I discusses how the Hyperion Wastewater Treatment Plant (HTP) produced Exceptional Quality (EQ) Biosolids after 5 phases of full‐scale studies from 1999 to 2003, trying several alternatives from 40 CFR Part 503. HTP got certification (permit) to operate Class A EQ since 2003 and has continued operations and land application of Class A EQ till present. Part II discusses how the Terminal Island Water Reclamation Treatment Plant (TITP) achieved similar biosolids in 3 phases between 1999 and 2004, trying Alternative 1 od 40 CFR Part 503. This plant has continued producing land applied Class A biosolids till present. During the presentation, we will discuss Class A EQ data for both plant up to the present. Research, operational and maintenance issues and future plans will also be discussed.