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Introduction

Lecture Video Intro

Section 7.1 — Processing Pathways

Lecture Video 7.1

Workflows, Flavour Outcomes, and Conversion Ratios

I. The Conversion Chain and Mass Balance

II. Reconciling the Ratios Across the Book

III. The Washed Process: Precision and Clarity

IV. The Natural and Honey Processes

V. Wet-Hulling: Processing Around the Climate

VI. Path Selection: Value Added Against Operational Risk

VII. The Pathway Decision Rule

Section 7.2 — Biochemical Control

Lecture Video 7.2

Fermentation Aids, Inoculation, and Identity

I. The Green Coffee Identity Framework

II. Fermentation Styles and Adjuncts

III. Anaerobic and Carbonic Maceration

IV. Worked Example: The Breakeven Premium

V. Testing the Breakeven Against Observed Prices

VI. Control Points and the Monitoring Protocol

VII. The Biochemical Control Decision Rule

Section 7.3 — The Engineering of Drying

Lecture Video 7.3

Physics and Systems of Moisture Removal

I. The Physics of Moisture Removal

II. Traditional Open-Air Systems

III. Solar Engineering

IV. Mechanical Dryers and the Energy Requirement

V. Temperature Ceilings, Case Hardening, and Over-Drying

VI. Water Activity and the Safety Threshold

VII. The Hybrid Decision Rule

VIII. The Drying Decision Rule

Section 7.4 — Quality Stability Metrics

Lecture Video 7.4

Moisture, Water Activity, and Thermal Ceilings

I. The Moisture Corridor

II. Water Activity: The Threshold Ladder

III. Thermodynamic Ceilings

IV. Worked Example: The Cost of Over-Drying

V. The Larger Loss: Quality Fade

VI. Conditioning and Equilibration

VII. The Stability Decision Rule

Section 7.5 — Wet Mill Analytics

Lecture Video 7.5

Bottleneck Modelling and Capacity Calculation

I. Turnout Ratios as Audit Instruments

II. Stage 1: Pulping Capacity

III. Stage 2: Fermentation Capacity

IV. Stage 3: Drying

V. Identifying the Bottleneck — and Recognizing That It Moves

VI. What the Model Reveals About Capital

VII. Decision Rules

Section 7.6 — Environmental and Social Governance

Lecture Video 7.6

Effluent and Circular Biomass

I. The Effluent Burden

II. Biological Remediation Architectures

III. Worked Example: Eco-Pulping and What It Does to Concentration

IV. Circular Biomass: The Value Streams

V. The Residue Allocation Problem

VI. Social Governance as a Quality Control System

VII. The Governance Decision Rule

Section 7.7 — Operational Economics

Lecture Video 7.7

Turnout Ratios, Working Capital, and Value Added

II. The 80/20 Rule and What It Implies About Price

III. The Value Added Decision Rule

IV. Worked Example: Experimental Pathways

V. Strategic Intake and the Binding Constraint

VI. Transparency and the Farmer Share

VII. The Operational Economics Decision Rule

Section 7.8 — Stabilization and Storage

Lecture Video 7.8

Conditioning, Resting, and Logistics

I. Conditioning and Resting

II. Warehouse Engineering and the Dry Chain

III. Inventory Discipline

IV. Worked Example: The Cost of Quality Fade

V. Pricing the Fade Correctly

VI. Logistics and Transit

VII. The Storage Decision Rule

Knowledge Check

Welcome to the definitive course on Coffee Post-Harvest Processing and Operations. The journey of coffee from cherry to green bean is a complex, scientifically rigorous process that dictates the final cup's quality, stability, and market value.

Welcome to the definitive course on Coffee Post-Harvest Processing and Operations. The journey of coffee from cherry to green bean is a complex, scientifically rigorous process that dictates the final cup's quality, stability, and market value. This comprehensive course is designed to equip coffee professionals, producers, and mill operators with the advanced knowledge required to master every stage of post-harvest production. Dive deep into the mechanics of processing pathways, exploring the nuances of washed, natural, honey, and wet-hulled methods. You will uncover the science behind biochemical control, learning how to leverage fermentation aids, inoculation, and anaerobic maceration to elevate flavor profiles while maintaining strict quality control. Beyond flavor, this course tackles the critical engineering and economics of coffee processing. Master the physics of moisture removal and drying engineering to prevent quality fade and ensure stability. Learn how to conduct wet mill analytics, identify operational bottlenecks, and calculate capacity to optimize your capital investments. Furthermore, we address the modern imperatives of Environmental and Social Governance (ESG), teaching you how to manage effluent, utilize circular biomass, and ensure sustainable operations. Whether you are looking to refine your experimental processing techniques, understand the operational economics of value-added pathways, or perfect your stabilization and storage logistics, this course provides the actionable frameworks and decision rules you need to succeed in the competitive coffee industry.

Chapter 7: Coffee Post-Harvest Processing and Operations

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            <p>The journey of coffee from a freshly harvested cherry to a stable, export-ready green bean is a complex intersection of biology, engineering, and economics. This comprehensive course explores the critical phase of post-harvest processing and operations, detailing the precise workflows required to maximize flavor outcomes and conversion ratios. By examining various processing pathways—including washed, natural, honey, and wet-hulling methods—learners will understand how to navigate operational risks and select the most viable methods based on climate and mass balance. Furthermore, the curriculum delves into the biochemical control of fermentation, exploring how adjuncts, anaerobic environments, and carbonic maceration can be leveraged to build a distinct green coffee identity while carefully calculating breakeven premiums against observed market prices.</p>

<p>Beyond the initial processing stages, successful coffee operations demand rigorous attention to drying engineering, quality stability, and facility analytics. The coursework systematically breaks down the physics of moisture removal, the critical thresholds of water activity, and the thermodynamic ceilings necessary to prevent case hardening and quality fade. Participants will learn to model wet mill bottlenecks, optimize capacity across pulping and fermentation stages, and apply operational economics to manage working capital and turnout ratios effectively. Finally, the integration of environmental and social governance—through the biological remediation of effluents and circular biomass strategies—ensures that production is not only economically sound but also sustainable, culminating in best practices for stabilization, warehouse engineering, and logistics to protect the final product across the dry chain.</p>
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