88 episodes
Producer Toolkit: Fermentation, Pt 3 — Is using yeast cheating? And who decides?
2026/08/24 | 32 mins.This episode explores why 30 cents a kilo is trivial for a large farm and unaffordable for a small one, the strange power imbalance that lets roasters define quality when nobody asks a winemaker what yeast they used, and how producers can talk to buyers who think starter cultures are cheating.
Part of The Coffee Producer Toolkit, a series made in collaboration with Lucia Solis, it will help you understand coffee farming better than most professionals you'll meet at a trade show.
Each episode takes one part of the farming business — agronomy, processing, fermentation, storage, quality, sales — and lays out what the best farms are actually doing.
Please spread the word about Filter Stories!
Follow us on Instagram - James (@filterstoriespodcast) and Lucia (@lluciasolis) - and tag us in an Instagram story.
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Stay up to date with Lucia through her newsletter
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Support James’ work directly by buying him a coffee at Ko-fi.com/FilterStories
Related podcast episodes:
Lucia:
#72: Planning Your First Coffee Fermentation Trials? Start Here.
#76: How Commercial Microbes Threaten The Coffee Industry
#80: How Microbiology Can Explain Beginner's Luck
James:
Filter Stories - Coffee Quality, Part 1: The birth of specialty coffee flavours
People mentioned in the episode:
Lester Lerner, Old Willow Coffee, Colombia
Victor Chala, Palma Rosa, Colombia
Fridolin Stocker— Mount Sunzu, Zambia
Shyira washing station, Rwanda
Evangelos Filippatos, La Cabra
La Cabra, Copenhagen
Helen Riley — Novonesis
Gunne Øregaard — Novonesis
Franz Zeimetz — Lost Origin Coffee Labs, Panama
Alejandra Rodríguez Delgado — Hacienda San Pedrito, Puerto Rico
Gustavo Arroyo — Rancho Contento, Puerto Rico
Resources:
pH meter & buffer
Thermometer
Novonesis Pichia yeast
Novonesis Lactobacillus bacteria
Pressure washer
Fermentation Log Sheet
Yeast’s impact on the environment in research on vineyards
Sprudge Best Of Panama coverage
Lucia’s Fermentation Training Camp
Coffee Wet Mill Sanitize
Opciones para la desinfección del beneficio
Cabal Cafe Podcast en Espanol
Lucia's Favorite Tools:
Temperature Gun
Ambient Temperature Sensor
Temperature Gun
pH meter & buffer solution
The Coffee Producer Toolkit is made possible by these leading coffee organisations:
The Coffee Quest | BWT | Descamex | InterAmerican | Pinhalense | Novonesis | GrainPro
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.Producer Toolkit: Fermentation, Pt 2 — The case for avoiding exciting fermentations
2026/08/24 | 35 mins.This episode explores why the specialty industry's obsession with exotic processing is a dangerous signal for farmers, five ways commercial microbes can make a farm more money, and what a well-run fermentation looks like on farms of very different sizes.
Part of The Coffee Producer Toolkit, a series made in collaboration with Lucia Solis, it will help you understand coffee farming better than most professionals you'll meet at a trade show.
Each episode takes one part of the farming business — agronomy, processing, fermentation, storage, quality, sales — and lays out what the best farms are actually doing.
Please spread the word about Filter Stories!
Follow us on Instagram - James (@filterstoriespodcast) and Lucia (@lluciasolis) - and tag us in an Instagram story.
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Stay up to date with Lucia through her newsletter
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Support James’ work directly by buying him a coffee at Ko-fi.com/FilterStories
Related podcast episodes:
Lucia:
#72: Planning Your First Coffee Fermentation Trials? Start Here.
#76: How Commercial Microbes Threaten The Coffee Industry
#80: How Microbiology Can Explain Beginner's Luck
James:
Filter Stories - Coffee Quality, Part 1: The birth of specialty coffee flavours
People mentioned in the episode:
Lester Lerner, Old Willow Coffee, Colombia
Victor Chala, Palma Rosa, Colombia
Fridolin Stocker— Mount Sunzu, Zambia
Shyira washing station, Rwanda
Evangelos Filippatos, La Cabra
La Cabra, Copenhagen
Helen Riley — Novonesis
Gunne Øregaard — Novonesis
Franz Zeimetz — Lost Origin Coffee Labs, Panama
Alejandra Rodríguez Delgado — Hacienda San Pedrito, Puerto Rico
Gustavo Arroyo — Rancho Contento, Puerto Rico
Resources:
pH meter & buffer
Thermometer
Novonesis Pichia yeast
Novonesis Lactobacillus bacteria
Pressure washer
Fermentation Log Sheet
Yeast’s impact on the environment in research on vineyards
Sprudge Best Of Panama coverage
Lucia’s Fermentation Training Camp
Coffee Wet Mill Sanitize
Opciones para la desinfección del beneficio
Cabal Cafe Podcast en Espanol
Lucia's Favorite Tools:
Temperature Gun
Ambient Temperature Sensor
Temperature Gun
pH meter & buffer solution
The Coffee Producer Toolkit is made possible by these leading coffee organisations:
The Coffee Quest | BWT | Descamex | InterAmerican | Pinhalense | Novonesis | GrainPro
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.Producer Toolkit: Fermentation, Pt 1 — Nature's lottery and coffee's 3,000-year lag
2026/08/24 | 22 mins.This episode explores why coffee is only fifteen years into a fermentation revolution that wine and bread went through millennia ago, what's actually happening inside the tank when microbes multiply into billions on their own, and why farmers who used to ferment as fast as possible are now trying to do the opposite.
Part of The Coffee Producer Toolkit, a series made in collaboration with Lucia Solis, it will help you understand coffee farming better than most professionals you'll meet at a trade show.
Each episode takes one part of the farming business — agronomy, processing, fermentation, storage, quality, sales — and lays out what the best farms are actually doing.
Please spread the word about Filter Stories!
Follow us on Instagram - James (@filterstoriespodcast) and Lucia (@lluciasolis) - and tag us in an Instagram story.
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Stay up to date with Lucia through her newsletter
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Support James’ work directly by buying him a coffee at Ko-fi.com/FilterStories
Related podcast episodes:
Lucia:
#72: Planning Your First Coffee Fermentation Trials? Start Here.
#76: How Commercial Microbes Threaten The Coffee Industry
#80: How Microbiology Can Explain Beginner's Luck
James:
Filter Stories - Coffee Quality, Part 1: The birth of specialty coffee flavours
People mentioned in the episode:
Lester Lerner, Old Willow Coffee, Colombia
Victor Chala, Palma Rosa, Colombia
Fridolin Stocker— Mount Sunzu, Zambia
Shyira washing station, Rwanda
Evangelos Filippatos, La Cabra
La Cabra, Copenhagen
Helen Riley — Novonesis
Gunne Øregaard — Novonesis
Franz Zeimetz — Lost Origin Coffee Labs, Panama
Alejandra Rodríguez Delgado — Hacienda San Pedrito, Puerto Rico
Gustavo Arroyo — Rancho Contento, Puerto Rico
Resources:
pH meter & buffer
Thermometer
Novonesis Pichia yeast
Novonesis Lactobacillus bacteria
Pressure washer
Fermentation Log Sheet
Yeast’s impact on the environment in research on vineyards
Sprudge Best Of Panama coverage
Lucia’s Fermentation Training Camp
Coffee Wet Mill Sanitize
Opciones para la desinfección del beneficio
Cabal Cafe Podcast en Espanol
Lucia's Favorite Tools:
Temperature Gun
Ambient Temperature Sensor
Temperature Gun
pH meter & buffer solution
The Coffee Producer Toolkit is made possible by these leading coffee organisations:
The Coffee Quest | BWT | Descamex | InterAmerican | Pinhalense | Novonesis | GrainPro
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.- This episode explores how just a handful of cheap instruments can ensure quality is reproducible year-on-year, and the wastewater crisis poisoning rivers behind picture-perfect coffee farms.
Part of The Coffee Producer Toolkit, a series made in collaboration with Lucia Solis, it will help you understand coffee farming better than most professionals you'll meet at a trade show.
Each episode takes one part of the farming business — agronomy, processing, fermentation, storage, quality, sales — and lays out what the best farms are actually doing.
Please spread the word about Filter Stories!
Follow us on Instagram - James (@filterstoriespodcast) and Lucia (@lluciasolis) - and tag us in an Instagram story.
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Stay up to date with Lucia through her newsletter
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Support James’ work directly by buying him a coffee at Ko-fi.com/FilterStories
Related podcast episodes:
Lucia:
Making Coffee with Lucia Solis — How to De-Funkify your Naturals
Making Coffee with Lucia Solis — Germination: A Close Look at Coffee Drying
James:
Filter Stories: Why One Colombian Farmer Chose Specialty, and the Other Walked Away
People mentioned in the episode:
Lester Lerner, Old Willow Coffee, Colombia
Orlando Osorio, La Primavera, Colombia
Astrid Medina, Tolima, Colombia
David Velásquez, Los Naranjos, El Salvador
Jesús Antonio Chala, Finca El Silencio, Colombia
Victor Chala, Palma Rosa, Colombia
Melissa de Gasperín, Rancho San Felipe, Córdoba, Mexico
Norberto Suárez, Boquete, Panama
César Marín, Chacra D'Dago, Peru
Manuel Matta, Santa Maria, Colombia
Resources:
Innovakit: canguaro (picking sleeves)
Pinhalense Cherry Floater
Pinhalense Vertical Pulper
Pinhalense Mechanical Dryers
Tolva — Plastic Vertical Hopper
Moisture Meter (Mid Tier)
Moisture Meter (High End)
Cenicafé Low-Water Wet Milling (Ecomill-type systems)
Flávio Borém Drying Research
DIY Moisture Maths (weight + fixed volume)
Lucia's Favorite Tools:
Temperature Gun
Ambient Temperature Sensor
Temperature Probe
pH meter & buffer solution
The Coffee Producer Toolkit is made possible by these leading coffee organisations:
The Coffee Quest | BWT | Descamex | InterAmerican | Pinhalense | Novonesis | GrainPro
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off. - This episode explores the simple drying mistakes that compromise months of careful work, and the low-cost fixes that protect a coffee's shelf life and flavour.
Part of The Coffee Producer Toolkit, a series made in collaboration with Lucia Solis, it will help you understand coffee farming better than most professionals you'll meet at a trade show.
Each episode takes one part of the farming business — agronomy, processing, fermentation, storage, quality, sales — and lays out what the best farms are actually doing.
Please spread the word about Filter Stories!
Follow us on Instagram - James (@filterstoriespodcast) and Lucia (@lluciasolis) - and tag us in an Instagram story.
Discover how I make these Filter Stories episodes by subscribing to my Substack newsletter
Stay up to date with Lucia through her newsletter
Write a review on Apple Podcasts
Leave a 5 star rating on Spotify
Support James’ work directly by buying him a coffee at Ko-fi.com/FilterStories
Related podcast episodes:
Lucia:
Making Coffee with Lucia Solis — How to De-Funkify your Naturals
Making Coffee with Lucia Solis — Germination: A Close Look at Coffee Drying
James:
Filter Stories: Why One Colombian Farmer Chose Specialty, and the Other Walked Away
People mentioned in the episode:
Lester Lerner, Old Willow Coffee, Colombia
Orlando Osorio, La Primavera, Colombia
Astrid Medina, Tolima, Colombia
David Velásquez, Los Naranjos, El Salvador
Jesús Antonio Chala, Finca El Silencio, Colombia
Victor Chala, Palma Rosa, Colombia
Melissa de Gasperín, Rancho San Felipe, Córdoba, Mexico
Norberto Suárez, Boquete, Panama
César Marín, Chacra D'Dago, Peru
Manuel Matta, Santa Maria, Colombia
Resources:
Innovakit: canguaro (picking sleeves)
Pinhalense Cherry Floater
Pinhalense Vertical Pulper
Pinhalense Mechanical Dryers
Tolva — Plastic Vertical Hopper
Moisture Meter (Mid Tier)
Moisture Meter (High End)
Cenicafé Low-Water Wet Milling (Ecomill-type systems)
Flávio Borém Drying Research
DIY Moisture Maths (weight + fixed volume)
Lucia's Favorite Tools:
Temperature Gun
Ambient Temperature Sensor
Temperature Probe
pH meter & buffer solution
The Coffee Producer Toolkit is made possible by these leading coffee organisations:
The Coffee Quest | BWT | Descamex | InterAmerican | Pinhalense | Novonesis | GrainPro
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.
Check out Standart, the award-winning coffee magazine. Get a free magazine and a free bag of coffee by clicking here.
Use ProfilePrint to find the coffee your customers loved last year (without a week of cupping!). Use promo code "FILTER" to get 10% off your first year of a Mini Beluga subscription. Click here to discover ProfilePrint's many uses.
Support hundreds of thousands of coffee farmers with Fairtrade. Discover how here.
Office coffee = easy recurring revenue. WMF’s Elevation 10 and Peak 50 do the work for you. Learn more here.
What kind of racing car does the Gaggia Classic GT home espresso machine remind you of? Use discount code FS202610 to get 10% off.
More Arts podcasts
Trending Arts podcasts
About Filter Stories - Coffee Documentaries
Coffee stories with an extra shot of history and science. Filter Stories is a podcast revealing coffee’s hidden microscopic secrets, its powerful past, and how your choice of beans impacts tens of millions of people.
See the behind-the-scenes stories on Instagram @filterstoriespodcast.
If you haven’t already, please subscribe to the show and review us on Apple Podcasts and Spotify!
Podcast websiteListen to Filter Stories - Coffee Documentaries, Die Storiekas and many other podcasts from around the world with the radio.net app

Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features
Get the free radio.net app
- Stations and podcasts to bookmark
- Stream via Wi-Fi or Bluetooth
- Supports Carplay & Android Auto
- Many other app features


Filter Stories - Coffee Documentaries
Scan code,
download the app,
start listening.
download the app,
start listening.
Filter Stories - Coffee Documentaries: Podcasts in Family

























