How our composting technology works

Smart design. Proven performance.

Our covered aerated static pile (CASP) system, enhanced with the  GORE® Cover, accelerates the transformation of diverse organic materials—like food, yard, and biosolids—into high‑quality compost. This proven approach delivers precise control over temperature, moisture, and blower metrics, ensuring regulatory compliance, minimal environmental impact, and consistent performance. Whether you're designing a new facility or optimizing an existing operation, SG's expert team guides you through every step—from site layout and system setup to monitoring, reporting, and final product optimization—so you can focus on efficiency, sustainability, and scale.

FLEXIBLE DESIGN

  • Our modular, expandable technology is standardized and fully commercialized - scalable from 100 tons per year to + 250,000 tons per year.

TREATMENT COSTS PER TON

  • Treatment cost per ton is lower compared to other systems because of the simplicity of design - few moving parts and the lowest energy consumption.

SMALL FOOTPRINT

  • A treatment time of 4 - 8 weeks verses open windrow of 8 - 12 months means more throughput on any site

LOW ENERGY CONSUMPTION

  • SG's covered aerated static pile design has lower energy consumption compared to negative aeration, reverse aeration, and timed positive aerated systems.
  • SG's Compost Control™ System is a proprietary remote oxygen and temperature control technology which is the most cost-efficient processing system.
  • Eliminates the need for a costly and high-energy consumption biofilter.

SIMPLE TO OPERATE

  • Fewer moving parts.
  • Can be operated by one person.
  • Less than one operator is 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 a roof or an enclosed building with a biofilter.
  • 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.

ODOR REDUCTION

  • Reduces odors by 90-99% as compared to open windrow or uncovered systems and without the need for a compost cover layer and/or biofilter (Odor emissions study – TA Luft).

EPA 503 EQUIVALENCY COMPLIANT

  • Meets the standards for Pathogen Reduction and Hygenization
  • Meets PFRP, VAR, Hygiene and ABPR EPA 503:Alt 5: Use of PFRP [503.32(a)(7) and (B)(1) of Appendix B] without the use of a foot compost cover layer.

VOC EMISSION CONTROL

  • Controls > 95% of VOC emissions verified by Independent Third Party Testing results
  • US/Cal >95% thus California Compliant for 80% (acc. To SCAQMD Rule 1133.3 and SJVAPCD Rules 4565 & 4566 and BACT)

GREENHOUSE GAS CONTROL

  • Lowest possible emission rate (C02 equivalent) compared to all other technologies. [Cuhls, C. (2012). Composting and fermentation of biowaste – contribution to reduce greenhouse gases. Waste Management, 3, 509–516.]

DUST & BIOAEROSOL CONTROL

  • Bacteria retention >99% (Thesis Dr. Kuhner: Emission Study)

STORMWATER LEACHATE MANAGEMENT

  • The SG Advanced Composting™ Technology provides clear separation of stormwater from leachate without the need for a roof or a building.

MOISTURE MANAGEMENT

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

REGULATORY COMPLIANCE MANAGEMENT

  • The SG Compost Control™ System automatically gathers all the required data for regulatory compliancy making reporting fast and easy.

COMPOST QUALITY

  • Meets compost quality standards for the US (USCC STA), for Canada (CCME Guidelines for Compost Quality), and for Australia (AS 4454)
  • Achieves the highest quality product in as little as a 6-8 week process, giving you the ROI you are looking for, regardless of the feedstock.
  • Agricultural-grade compost can be produced in as little as 3-4 weeks.
SG_ProcessDiagram_R1_AltLayout

COMPLIANCE FACTS

  • Pathogen Reduction and Hygenization
  • Meets PFRP, VAR, Hygiene and ABPR EPA 503:Alt 5: Use of PFRP [503.32(a)(7) and (B)(1) of Appendix B] without the use of a foot compost cover layer.
  • Effective Odor Control for Good Air Quality - Odor reduction 90-95% (Odor emission study)
  • Controls > 95% of VOC emissions verified by Independent Third Party Testing results
  • US/Cal >95% thus California Compliant for 80% (acc. To SCAQMD Rule 1133.3 and SJVAPCD Rules 4565 & 4566 and BACT)
  • Greenhouse Gas Control - Lowest possible emission rate (CO2 equivalent) compared to all other technologies
  • Dust and Bioaerosol Control - Bacteria retention > 99%, e.g. Aspergillus fumigatus
  • Dust and Particulate Matter (PM) Retention > 99% (Thesis Dr. Kühner: Emission Study)
  • The SG Advanced Composting™ Technology provides clear separation of stormwater from leachate without the need for a roof or a building.

Smarter Aeration

Air Is the Engine of the Composting Process

Our systems use precise, computer-controlled positive aeration to deliver optimal airflow throughout the pile. The result is consistent temperature, oxygen, and moisture across the batch, driving rapid pathogen reduction and compost stabilization.

Key Features

Analyze Blower Metrics

Energy-efficient fan cycles

In-ground trenching or on-grade pipe

Custom configurations for every site

A1-Organics_control box_blower

Integrated Performance

A Complete, Closed-Loop Process

From aeration to compost curing, SG ADVANCED COMPOSTING™ Technology delivers high-performance results that are third-party certified and climate-resilient.

  • Rapid PFRP and VAR compliance

  • High-quality, saleable compost

  • Reduced Odors, neighbor-safe, permit-compliant

Monitoring That Makes the Difference

SG Compost Control™ System, Designed by Operators for Operators

The SG COMPOST CONTROL™ System is a proprietary cloud-based platform that lets you monitor and adjust your piles from your laptop or mobile device in real time.

  • View temperature, oxygen, blower metrics, and status

  • Configure individual batches for each Bunker / Heap

  • Export data for regulatory reporting

  • Get alerts when action is needed

Yodda Software screenshots 3

Layouts That Fit Your Facility

Modular Designs, Ready for Any Site

Choose the system layout that fits your feedstock, capacity, and footprint.

IMG_2823

SG Mobile® SYSTEM

Best for pilots, small-medium sites, or off-grid use

SG BUNKER® System

SG Bunker® SYSTEM

High-throughput permanent installations

Heap-SG

SG Heap® SYSTEM

Simple, scalable processing