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. Recently the City completed an audit of their biosolids EMS Program. The re-verification audit was performed on September 23-27 by DEKRA, an independent audit firm. The auditors verified that the City’s biosolids program meets the requirements of National Biosolids Partnership (NBP) EMS program and recommended continued certification in the NBP EMS program at the Platinum Level status. To view a summary of the findings and the final audit report click here.


This page was updated
on November 18, 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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contact For more information, call
(310) 648-5877
or send your questions and comments to
San.BiosolidsEMS@lacity.org

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