Containerized Compost System (CCS)

As an operator, your challenge is to keep regulators, neighbors and compost users happy with your facility. The CCS is designed to help you succeed. Composting takes place in controlled batches with airtight vessels (CompTainers™) that can be moved and emptied by roll-off trucks. Each CompTainer is closely controlled to optimize decomposition, meet regulatory requirements and minimize odors. The unique aeration system can integrate up to 50 CompTainers into a single system. Add a small building for receiving and mixing plus a biofilter to remove odors, and you have a completely enclosed compost system at a fraction of the cost of other in-vessel systems.

Video: Sun Peaks Resort Containerized Compost System

Containerized Compost System - City of HutchinsonComposting in roll-off containers allows enormous flexibility in system design and operation. The same CompTainer module can be used to compost from 2 to 50 tons per day. If odor and process control are concerns, then the CCS is the technology you need.The Containerized Compost System™  (CCS) composts sewage, septage, and other putresible organic materials in an entirely enclosed environment.  Featuring a sophisticated process control system (CompDAC’s), the CCS facilitates natural degradation processes to convert Class B pathogenic waste into safely disposable and marketable Class A compost.  Comprised of a mixer, conveyor, and computer-controlled bioreactors, the CCS handles waste from its raw or treated form to its final curing stage.  Green Mountain Technologies’ airtight bioreactors provide highly efficient aerobic composting as well as cost-effective odor control, leachate containment, and waste conversion.  Because the bioreactors are roll-off vessels that can be run individually or in parallel, the CCS can be sized to fit facilities processing one to 100 tons of sludge per day.

Containerized Compost System - City of HutchinsonThe integration of sophisticated process control capability with practical design concepts allows GMT to provide the most affordable in-vessel composting system on the market today.  The modular design means that facilities can initiate their CCS with only one CompTainer™ if they choose, and then bring more into the system as demand grows.  This modularity offers the benefit of minimizing up-front capital investment while ensuring that capacity can grow to meet demand.  The modular design also makes the CCS extremely flexible in terms of responding to problematic batches of compost and peaks in processing demand.

Another feature minimizing start-up costs is the compatibility of the CCS with non-specialized equipment.  The CompTainers™ fit any standard cable-lift (roll-off) truck.  Similarly, any manufacturer can supply the wheel-loaders and screener.  The CCS is proven effective in all weather conditions, even in extreme winter cold.  The efficiency and year-round performance of the CCS ensures maximum cost recovery.

CCS systems are typically used at biosolids or food waste municipality sites.

The CompTainer™

  • The CompTainer is an airtight stainless steel vessel for high-rate composting. Two sizes are available with 40 or 50 cubic yards of composting capacity. The patented aeration floor evenly distributes pressurized air while collecting and storing leachate. With no moving parts, the CompTainer is simple to operate and easy to maintain and is compatible with most standard roll-off trucks.

Main Controller Firmware

  • Continuously monitor and record the temperature of the CompTainer.
  • Use a modified PID closed loop control algorithm with automatic integrator gain reset to control damper position via stepper actuator.
  • Automatically and in succession, implement up to four user-defined time/temperatures process goals for each CompTainer.
  • Automatically revert to a special control mode, which facilitates heating up the compost mix if temperatures approach lower set-point limit.
  • One year complimentary technical support.

Operator Interface and Graphing Software running on a remote Personal Computer:

  • Pentium 500 or higher desktop running Windows™ 98 or higher.
  • Software shall allow operator to download process control parameters and batch data from the Field Controller.
  • Real time or historical data shall be stored in spreadsheet compatible files or displayed temperature/time graphs.
  • Communication shall be via Ethernet to desktop.

The CompLoader™

  • Efficient material handling keeps labor requirements to a minimum. The CompLoader is a mobile conveyor which evenly loads material from the mixer into CompTainers at rates up to 2 tons per minute. The high-energy flail at the end of the conveyor breaks up clumps to increase porosity for even distribution of the mix inside the CompTainer. The rugged hydrostatic drive provides a complete range of speeds for the conveyor belt and flail.
    • A 35’ mobile loading conveyor is designed to receive the mixed raw materials from the bulk mixer.
    • Loading conveyor shall distribute the material uniformly using a discharge flail, which rotates on a horizontal axis for minimum compaction across the aeration floor of the CompTainer.
    • Conveyor shall be hydraulically powered. A 15 hp 230/460 volt, 60 Hertz, will power the hydraulic motor 3 phase, 1.15-service factor, TEFC motor.
    • The belt conveyor adjustment cylinders, drive wheels, discharge and flail shall be hydraulically driven.
    • Motor contactors, switches and wiring to be supplied by others.

The CompMixer™

  • Preparing the right mix is essential for effective composting. GMT offers a complete line of 4 auger mixers to blend organic materials for composting. Sizes from 150 to 625 cubic feet are available in stationary and transportable models. Weigh scales allow for accurate measurement of compost ingredients.

Aeration and Odor Control

  • Maintaining aerobic conditions and capturing process air are the keys to odor control. The closed loop aeration system collects all the process air to minimize odor releases. Rotary dampers connected to each CompTainer automatically reverse air flow direction and regulate flow. All process air is treated using biofiltration to remove up to 95% of odor compounds. Variable speed motors with stainless steel blowers will be used so the controller in response to temperature and pressure feedback can adjust the aeration rate and have sufficient capacity to pressurize exhaust air through the biofilter.
    • Supply blower motor will be between, 3 hp and 20 hp per loop, (dependent upon final design configuration of the facility) 230/460 volt, 60 Hertz, 3 phase, 1.15 service factor, NEMA Design B Motor with Class F insulation.
    • Computer controlled motorized low voltage dampers for reversing the airflow in each CompTainer to control the aeration direction and average cfm supplied.
    • All ducting from blowers to dampers and mounting hardware for attachment to concrete.
    • Flexible ducting from dampers to CompTainers.
    • Installation of all line voltage wiring to be done by others.
    • GMT will mount and install dampers, ducting support brackets and ducting from blowers to CompTainers.
    • Aeration system enclosure.

The CompDACS

  • Compost Data Aquisition & Control System
    The CompDACS™ takes the guess work out of composting. The computer based controller regulates the position of rotary dampers to regulate the direction and volume of process air. The CompDACS stores temperature graphs and prints reports to meet EPA 503 requirements for class A compost. The primary aeration control strategy utilizes a VFD to regulate blower speed to maintain constant duct pressure. Secondary aeration control is via a three-position damper, which regulates volume and direction of airflow to each container. The system includes a main control panel, field control panel, and field J-box. All panel-to-panel communication is via Ethernet cable.1. NEMA 4 Main Controller enclosure containing:
  • A real-time micro-controller with non-volatile data storage and ISAGRAF control software, analog and digital I/O, and an industrial Ethernet hub
  • Connection to PC interface operator control for the blowers, and each composting vessel
  • Line voltage wiring and conduit to be supplied by others
  • GMT will connect all low voltage wiring, sensors and actuators for controller.
  • Ethernet Cat5 link to control room to be supplied by others.

2. NEMA 4 Field Panel containing:

  • Analog I/O capacity to control supplied CompTainers.
  • Ethernet jack for connection to main controller.
  • Power supply for damper actuators (one per CompTainer).

3. Temperature Probes:

  • Provide each CompTainer with two compost temperature-averaging probes.
  • Probes shall be sealed 0.5″ nominal diameter stainless steel tube with thermo-well heads.
  • Temperature sensors shall have a rated accuracy of +/- 0.4°C @25°C or better with RTD transmitter in probe head.
CompTainer CT-40 CT-50
Interior Volume (Cubic Yards) 43.5 53
Processing Capacity (yds) ~40 ~50
Length 23.7′ 25.7′
Width 8.25′ 8.5′
Height 8.5′ 9.4′
Interior Construction 304L SS 304L SS
Weight (approx)* 8500 lbs 12500 lbs
Aeration Ports 6″ Camlock 6″ Camlock
Roll-Off Platform Cable or Hook-Lift Hook-Life Only
*Weight may very with options packages.
Gasketed hydraulic opening roof
R-20 cold-weather insulation package

The CompTainer is an airtight stainless steel vessel for high-rate composting. Two sizes are available with 40 or 50 cubic yards of composting capacity. The patented aeration floor evenly distributes pressurized air while collecting and storing leachate.

  1. GMT will provide the specified quantity of CompTainers, with a carbon steel structure. Insulated to a
    Minimum R-10 on all surfaces.
  2. The interior of each CompTainer surface shall be all 304 stainless steel construction.
  3. GMT patented aeration floor design shall be constructed of 304 perforated stainless steel panels with a stainless steel support frame.
  4. Each CompTainer shall have a fully gasketed door and loading hatch.
  5. The steel skid rail shall have a wall thickness of not less than 1/4″.
  6. Minimum steel thickness for wall and floor construction is 14-gauge steel.
  7. Each CompTainer shall have a cable lift design to be legally transported over public roads by the locally available roll-off truck hauling concession.
How Containerized Composting Systems Work

CompLoader Spec
CompLoader Spec
CompDACS Spec
CompDACS Spec
Compact CCS
Compact CCS

Containerized Compost System Case Studies

Prince Edward Island: Centralized Composting Facility
Prince Edward Island: Centralized Composting Facility
Town Of Wilmington Sludge Treatment Center
Town Of Wilmington Sludge Treatment Center
Town of Westport WA: In-Vessel Composting
Town of Westport WA: In-Vessel Composting
Septage To Compost Success Story
Septage To Compost Success Story
Composting Organics - Hutchinson, MN
Composting Organics - Hutchinson, MN

Containerized Compost System (CCS) Image Gallery