Our Technology

Sustainable Generation is right for business, here's why:

How it Works

It all starts with the GORE® Cover System


As the only Authorized GORE® Cover Sales and Service Provider for North America, Sustainable Generation delivers not only first hand owner/operator knowledge but also the reliability of the proven GORE® Cover System:

Watch a quick presentation on how GORE® works. +

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GORE® Cover

The GORE® Cover is centered on membrane laminate technology similar to that of the company’s world famous GORE-TEX® fabric used in outerwear and footwear. The microporous membrane impacts air permeability and the extraction of moisture during composting – it prevents the compost from becoming too dry or too wet and it retains odors. It allows for an even distribution of air, thus ensuring optimal temperatures are achieved throughout the heaps.

Official certificates and approvals have been granted to the GORE® Cover for:

  • Delivering “in-vessel” performance (without the need for a building or roofed structure) in the United States and Canada
  • Meeting strict PFRP and high quality compost standards
  • Meeting strict regulatory emissions compliance standards worldwide.
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Blower

Each heap has forced aeration through a blower that provides air to the composting material via the aeration trenches. The blower is regulated by the control system, so it automatically cycles on and off. The control system constantly monitors the oxygen and temperature in the heaps to create an optimal environment for the microbes to do their work by controlling the amount of oxygen in the heaps.

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Control System

The control system monitors oxygen and temperature within the heaps to create an optimal environment for the microbes by controlling the amount of oxygen. This technology also makes for the most cost-efficient processing. The covered aerated static pile design has lower energy consumption compared to negative aeration, reverse aeration and timed positive aired systems. It also reduces or eliminates the need for a costly, high-energy consumption biofilter.

The software system automatically gathers all the necessary regulatory data. It monitors temperatures by date, time and heap to produce regulatory reports that help make the compliance reporting process very simple.

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Aeration & Leachate System

Composting is a biological process with naturally occurring batch-by-batch variations in input material. The oxygen-controlled positive aeration system automatically adapts the aeration intensity to these batch variations and to the changing oxygen demand in the course of a composting cycle. Two aeration trenches are under each heap. These trenches serve as ducts to provide air to the heap and also to collect leachate coming from the heap.

Leachate is effectively managed in two ways: Separation of stormwater from leachate – is achieved by physically covering the organic material with the GORE® Cover and sealing it to the ground. Leachate collection – is collected under the heaps by the trenching system and directed, by drainage piping, to a holding system for treatment, reuse or discharge.

On their own, compost piles can cause unpleasant odors and emit harmful emissions such as VOCs (volatile organic compounds) and GHGs (greenhouse gases)...
…contribute to groundwater contamination…
…and at commercial sites, take up a lot of space and cause inconsistencies in production.
The GORE® Cover is different.
It is a high tech composting solution that begins with the microporous GORE® cover itself…
…and a system that helps exponentially accelerate the natural composting process through positive aeration.
To maintain an optimal environment, in all climate conditions, the control system monitors oxygen and temperature in the heaps…
…and a blower automatically injects air through the floor, when necessary, to assure ideal conditions.
The aeration ducts and leachate collection system keep the air flowing and provides a clear separation of leachate from stormwater to prevent groundwater contamination.
In up to 8 weeks, the result is valuable, nutrient-rich compost.

How Does it Compare?

See How Sustainable Generation Stacks Up


Using a simple, integer-based scoring system, the major composting technology choices of today are compared across three basic sets of standards that any composting technology, that’s right for the environment and right for business, should feature.

The Rating System

Open Windrow
ASP with Biofilter
(Negative Air or Reversing Air)
ASP with Biolayer Cap
(Positive Air)
In Building with Biofilter
GORE® Cover ASP
Air
VOC Emisson Control > 90%
2
2
3
3
EPA 503 Equivalency Compliant
1
3
3
3
3
Odor Control > 90% Reduction
2
2
3
3
Lowest Carbon Footprint
2
1
2
3
Dust and Bioaerosol Control > 99%
2
1
3
3
Water
Best Stormwater Management
2
1
3
3
Best Leachate Management
2
1
3
3
Best Contact Water Management
1
1
3
3
Economic
Small Footprint
1
2
2
3
Low Energy Consumption - Energy Efficient
2
1
3
Low Treatment Costs per Ton - Operating Cost
2
3
Effective in All Climates
1
1
3
3
Simple to Operate - Few Moving Parts
2
3
Moisture Management
1
1
1
3
Handles Difficult Waste Streams
2
2
2
3
3
Highest Compost Quality
1
1
1
1
3
Automated Regulatory Compliance Management
2
2
3
3
Total Score
8
24
24
36
51

What is the Impact on ROI?

SG Helps Deliver a Positive Return on Investment (ROI)


Sustainable Generation helps you see that important decisions about facility design, environmental compliance, process control and operations must be considered over the life span of the facility in order to deliver economic sustainability. Backed by firsthand owner-operator knowledge, SG ‘s solutions provide the lowest total cost of ownership.

Facility Decisions
Considered Over Facility Life Span
Economic Sustainability

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Most Flexible Design

Proprietary design concepts unique in the industry. Our modular, expandable technology is repeatable for standard and customized designs – scalable from 1 heap to +100 heaps.

Treatment Costs Per Ton

Treatment cost per ton is lower compared to other systems because of simplicity of design with few moving parts and low energy consumption.

Small Footprint

A throughput capacity of 4 – 8 weeks vs. windrow of 8 – 12 months allows more material to be processed on a smaller site.  Process capacity of 30,000 tons per one acre compost pad.

Low Energy Consumption

SG’s aerated static pile design has lower energy consumption compared to negative aeration, reverse aeration and timed positive aired systems. SGS use of proprietary remote oxygen and temperature control system technology makes for the most cost-efficient processing. Also reduces or eliminates need for costly, high-energy consumption biofilter.

Simple To Operate

Few moving parts. Can be operated by one person. Less than one operator required for every 10,000 tons processed yearly.

Effective In All Climates

Encapsulated technology is not influenced by weather or climate and does not need an enclosed building. From the arid heat of the Mohave Desert to Finland’s subzero snowy climate, SG’s solution is a proven winner in any climate. Hot, wet, dry and subfreezing applications.

Varied Inputs

Go from green waste to food waste to biosolids with the same scalable system. Able to handle most difficult waste streams including MSW and animal sludges and other hard to compost organics.

Odor Reduction

Reduces odors 90%+ as compared to open or uncovered systems and without the need for a compost cover layer.

EPA 503 Equivalency Compliant

Our solution meets the EPA 503 regulations for PFRP and vector attraction reduction (VAR) without the use of one foot compost cover layer.

VOC Emission Control

Controls 90%+ VOC emissions. Meets tough new CA air standards.

Stormwater Leachate Management

SG process offers clear separation of stormwater and leachate. No need for a building or roof. Faster permitting, less infrastructure expense and smaller footprint.

Moisture Management

Once the proper 55%-65% moisture content is achieved on the initial mix recipe, our solution manages the moisture throughout the entire process with no need to add additional water to maintain proper moisture in the process.

Regulatory Compliance Management

Automatically gathers all the regulatory data needed. Monitors temperatures by date, time and heap to produce regulatory reports for you. Helps make the reporting process easier.

Compost Quality

Achieves the highest quality product in 8 week process, giving you the ROI you are looking for regardless of the feedstock. Agricultural grade compost can be produced in as little as 4 weeks.

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