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Filter Stories - Coffee Documentaries

James Harper
Filter Stories - Coffee Documentaries
Latest episode

88 episodes

  • Filter Stories - Coffee Documentaries

    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.
  • Filter Stories - Coffee Documentaries

    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.
  • Filter Stories - Coffee Documentaries

    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.
  • Filter Stories - Coffee Documentaries

    Producer Toolkit: Processing, Pt 3 - Critical instruments and poisoned rivers

    2026/08/09 | 28 mins.
    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.
  • Filter Stories - Coffee Documentaries

    Producer Toolkit: Processing, Pt 2 - Drying mistakes that ruin coffee quality

    2026/08/09 | 30 mins.
    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.
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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!
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