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.

• Griffith Park Compost Facility Product Fact Sheet
• Department of Recreation and Parks-Griffith Park Compost Facility Fact Sheet

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