Master Composter Training

Lesson 1 • The Biology of Decomposition

Covers the microbial communities—bacteria, fungi, actinomycetes—that drive breakdown. Links organism activity to temperature, moisture, and oxygen availability.

Lesson 2 • What Composting Is and Why It Matters

Defines composting as managed aerobic decomposition and situates it within nutrient cycling. Provides the conceptual anchor for all subsequent technical content.

Lesson 3 • Carbon-to-Nitrogen Ratio Fundamentals

Explains C:N ratio as the primary feedstock balancing tool. Students calculate ratios for common materials and predict process outcomes.

Lesson 4 • Feedstock Identification and Categorization

Surveys greens, browns, and prohibited materials across residential and commercial sources. Builds the material literacy needed for recipe design.

Lesson 1 • Aeration System Design

Details passive and active aeration strategies including pipe placement and blower sizing. Students match aeration design to feedstock type and throughput volume.

Lesson 2 • Bin and Pile Construction Techniques

Covers materials, dimensions, and structural requirements for bins and open piles. Connects design choices to aeration, moisture retention, and turning access.

Lesson 3 • Scaling Systems for Volume and Context

Guides students from backyard to community-scale design decisions. Addresses throughput calculations, equipment needs, and labor requirements.

Lesson 4 • Overview of Composting Methods

Surveys static pile, turned windrow, aerated static pile, in-vessel, and vermicomposting systems. Establishes selection criteria used throughout the chapter.

Lesson 1 • Sourcing and Evaluating Feedstocks

Covers supplier vetting, contamination screening, and material testing protocols. Ensures students can assess feedstock quality before incorporating it into a recipe.

Lesson 2 • Managing High-Nitrogen Feedstocks

Addresses ammonia volatilization, odor, and slumping caused by nitrogen-rich inputs. Students apply bulking agents and layering strategies to correct imbalances.

Lesson 3 • Recipe Calculation Methods

Teaches weighted-average C:N calculations and moisture blending formulas. Students use manual and spreadsheet-based tools to design balanced recipes.

Lesson 4 • Seasonal and Supply-Chain Adjustments

Prepares students to adapt recipes when preferred feedstocks are unavailable. Covers substitute materials, stockpiling strategies, and seasonal C:N shifts.

Lesson 1 • Building and Activating a Compost Pile

Covers layering sequence, initial moisture charging, and inoculation options. Establishes the starting conditions that determine active-phase performance.

Lesson 2 • Diagnosing and Correcting Process Problems

Presents a systematic troubleshooting framework for common failures: odor, low heat, pests, and slumping. Students apply corrective actions and document outcomes.

Lesson 3 • Turning Techniques and Schedules

Compares manual and mechanical turning methods and their effects on aeration and homogeneity. Students develop turning schedules based on temperature and moisture data.

Lesson 4 • Temperature Monitoring and Management

Teaches probe placement, logging frequency, and interpretation of temperature curves. Students use temperature data to time turning events and confirm pathogen reduction.

Lesson 1 • Screening, Finishing, and Storage

Covers trommel and flat-screen sizing, overs management, and proper storage to preserve quality. Students plan a finishing workflow from cured pile to market-ready product.

Lesson 2 • The Curing Phase Explained

Distinguishes active composting from curing and explains why curing is essential for plant safety. Covers duration, pile management, and environmental conditions during curing.

Lesson 3 • Physical and Chemical Quality Indicators

Examines color, odor, texture, pH, electrical conductivity, and nutrient content as quality markers. Students evaluate finished compost against accepted quality benchmarks.

Lesson 4 • Compost Quality Standards and Certification

Reviews voluntary certification programs and regulatory quality thresholds for pathogen and metal limits. Students prepare documentation packages required for certification.

Lesson 1 • Bin Design and Bedding Preparation

Details flow-through, stacked tray, and windrow vermicomposting systems and their bedding requirements. Students select and prepare bedding to support worm health from day one.

Lesson 2 • Harvesting and Quality of Vermicompost

Teaches light-separation, migration, and mechanical harvesting methods and vermicompost quality assessment. Students produce a harvest plan and evaluate finished vermicompost.

Lesson 3 • Feedstock Management for Vermicomposting

Identifies suitable and harmful feedstocks and establishes feeding rates and pre-composting protocols. Prevents worm mortality from toxic or overloaded inputs.

Lesson 4 • Vermicomposting Biology and Worm Species

Covers the biology of composting worms, focusing on Eisenia fetida and Lumbricus rubellus. Explains how worm physiology drives vermicompost quality.

Lesson 1 • Monitoring Soil Health Outcomes

Introduces soil health indicators—organic matter, infiltration, compaction, biology—and monitoring protocols. Students design a multi-year soil health monitoring plan.

Lesson 2 • Soil Science Essentials for Composters

Reviews soil texture, structure, organic matter, and biological activity as the context for compost benefits. Connects compost properties to specific soil improvement mechanisms.

Lesson 3 • Application Methods and Equipment

Covers surface dressing, incorporation, mulching, compost tea, and topdressing for turf. Students match application method to site conditions and crop type.

Lesson 4 • Compost in Specific Land-Use Contexts

Addresses application strategies for vegetable gardens, orchards, turf, and land restoration. Students adapt rate and method recommendations to each context.

Lesson 1 • Public Education and Outreach

Teaches workshop design, demonstration site setup, and multilingual communication strategies. Students create an outreach plan targeting diverse community audiences.

Lesson 2 • Program Evaluation and Continuous Improvement

Introduces diversion rate metrics, participant satisfaction surveys, and cost-benefit analysis. Students design an evaluation framework and use findings to improve program performance.

Lesson 3 • Volunteer Recruitment and Training

Addresses recruiting, onboarding, and retaining volunteers as composting program operators. Students design a volunteer training curriculum and retention strategy.

Lesson 4 • Designing a Community Composting Program

Covers needs assessment, stakeholder mapping, goal setting, and program model selection. Students produce a program design document aligned to community context.