Waste Connections, Port Angeles, WA

Port Angeles, WA 2004

Capacity (TPY)


Technologies Used

  • Aerated Static Pile System
  • CompTroller™ Automated Control & Monitoring System

Client Needs:

For full facility details, please give us a call at (206) 634-2

The City of Port Angeles’ old Aerated Static Pile facility was no longer in working order and needed an upgrade to compost their biosolids. The City issued an RFP for a new ASP capable of composting 260 dry tons of biosolids and yard wastes per year.

The City required:

• Equipment appropriate to fit into their existing facility with a covered roof;

  • Automated aeration control, monitoring and data recording for PFRP and VAR;
  • Below-grade aeration floor so they could stop using a problematic pipe-on-grade floor; and,
  • On-going technical support and periodic training for employees to keep up with turnover.

ECS Solution:

ECS was awarded the first contract provide a three zone CASP, and then later another three zones to make a total of six zones. This system included the ECS CompTroller™ aeration control and monitoring system, the ECS LFT aeration floor (a below-grade system that distributes air uniformly through a network of pipe trenches with little pressure loss), and a reversing aeration system with a single output controlled fan and a low pressure loss system of plenums and actuated dampers.  Each zone is 25 feet by 50 feet long and bordered on three sides by “ecology” block walls.

Since start-up and the initial staff training in 2004, ECS has been supplying technical assistance and facility support as requested.  In 2017, ECS upgraded the 14 year old CompTroller™ with a new, high reliability solid state control server and software system. 

Contact ECS to learn more.

We want to learn how to support your composting goals!

4220 24th Avenue West
Seattle, Washington 98199

Tel: (206) 634-2625
Fax: (206) 634-1309