Biosolids EMS
City of Los Angeles Home
Managing Our Biosolids
Introduction
Land Application: Green Acres Farms
Composting: Griffith Park Compost Facility
Deep Well Injection: T.I.R.E.
Other Options and Proposals

 

you should know...

The City is committed to managing its biosolids in an environmentally sound, socially acceptable, and cost-effective manner. We are constantly reviewing the program and incorporating continual improvements. In 2005, the City was directed by a writ of mandate issued by the Tulare County Superior Court (Writ) to undertake an evaluation under Section 15168(c) of the California Environmental Quality Act (CEQA) guidelines to determine if additional CEQA review was required for the 2000 purchase of the Green Acres Farm site in Kern County and the 2000 amendment of the Responsible Biosolids Management (RBM) contract for the transportation and land application of biosolids. Based on the Writ, an addendum to the 1989 and 1996 Biosolids Program Environment Impact Reports (EIR) was prepared and approved by the City Council on December 8, 2010. In April 2012, the Court Order ruled that the addendum was inadequate to discharge the Writ and directed the City “to do a new Initial Study per §15168(c)(1), and to proceed thereafter as required by law.” As directed by the court, the City has prepared an Initial Study and will prepare the Green Acres Biosolids Land Application EIR. Click here to view the CEQA documentation and find out how to provide comments on the process.

This site was updated on
February 19, 2013

Composting: Griffith Park Compost Facility

Composting is the process by which organic materials such as biosolids are decomposed into a nutrient-rich soil conditioner. There are three primary composting methods, all of which produce a safe, high quality product:

  • Windrow composting takes place in linear piles as organic material is blended, then turned at regular intervals to provide aeration. This is the simplest compost process, having the lowest level of process control and requiring very little inputs (e.g. electricity, etc.).
  • In Aerated Static Pile (ASP) composting, piles of blended organic waste materials remain stationary throughout the process and are aerated by a circulation system. ASP composting offers more process controls than windrow composting, reducing stabilization time and land area required for a site. Process air pulled through the active composting piles can be directed to odor control equipment such as a biofilter.
  • In-vessel composting processes use an automated, fully enclosed system that mechanically agitates and aerates blended organic materials in concrete bays. In-vessel composting features maximum process control and is generally preferred where site selection dictates maximum odor control and where weather conditions warrant an indoor composting process.

The City produces a compost product at the Griffith Park Compost Facility. Click the links below to find out more about the facility.

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