{"id":15030,"date":"2025-01-22T13:03:36","date_gmt":"2025-01-22T18:03:36","guid":{"rendered":"https:\/\/beersmith.com\/blog\/?p=15030"},"modified":"2025-01-22T13:03:42","modified_gmt":"2025-01-22T18:03:42","slug":"process-control-of-dms-in-lagers-with-dr-greg-casey-beersmith-podcast-317","status":"publish","type":"post","link":"https:\/\/beersmith.com\/blog\/2025\/01\/22\/process-control-of-dms-in-lagers-with-dr-greg-casey-beersmith-podcast-317\/","title":{"rendered":"Process Control of DMS in Lagers with Dr Greg Casey &#8211; BeerSmith Podcast #317"},"content":{"rendered":"<div style=\"float: right; margin-left: 10px;\"><a href=\"https:\/\/twitter.com\/share\" class=\"twitter-share-button\" data-via=\"beersmith\" data-count=\"vertical\" data-url=\"https:\/\/beersmith.com\/blog\/2025\/01\/22\/process-control-of-dms-in-lagers-with-dr-greg-casey-beersmith-podcast-317\/\">Tweet<\/a><\/div>\n<p class=\"wp-block-paragraph\">This week Dr Greg Casey joins me to discuss Dimethyl Sulfide (DMS) in lagers, and how process control can aid in reducing DMS.<\/p> <p class=\"wp-block-paragraph\"><strong>Subscribe on iTunes to <a href=\"https:\/\/itunes.apple.com\/us\/podcast\/beersmith-home-beer-brewing\/id398500515?mt=2\">Audio version <\/a>or <a href=\"https:\/\/itunes.apple.com\/us\/podcast\/beersmith-home-beer-brewing\/id824963861\">Video version<\/a> or <a href=\"https:\/\/open.spotify.com\/show\/7vwQRBi8HJBpePV3I7Dpj5\">Spotify <\/a>or <a href=\"https:\/\/podcasts.google.com\/feed\/aHR0cHM6Ly9iZWVyc21pdGguY29tL2NvbnRlbnQvZmVlZC9wb2RjYXN0Lw\">Google Play<\/a><\/strong><\/p> <p class=\"wp-block-paragraph\"><a href=\"https:\/\/traffic.libsyn.com\/beersmith\/BSHB-317-Casey.mp3\" target=\"_blank\" rel=\"noreferrer noopener\">Download the MP3 File<\/a>&#8211; Right Click and <strong>Save As<\/strong> to download this mp3 file.<\/p> <audio controls=\"\"> <source src=\"https:\/\/traffic.libsyn.com\/beersmith\/BSHB-317-Casey.mp3\" type=\"audio\/mpeg\"\/>\nYour browser does not support the audio element.\n<\/audio> <hr class=\"wp-block-separator alignfull has-alpha-channel-opacity\"\/> <iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/aR85MlVQx7M?si=eEi-HNF-Q8nAVWrk\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe> <h3 class=\"wp-block-heading\" id=\"topics-in-this-week-s-episode-50-46\">Topics in This Week&#8217;s Episode (56:09)<\/h3> <ul class=\"wp-block-list\">\n<li>This week I welcome back Dr Greg Casey. Greg has had an extensive history in brewing including Carling O&#8217;Keefe, Molson&#8217;s, Carlsberg, Anheuser-Busch, Stroh, Coors, Molson Coors and MillerCoors. He holds a PhD in Applied Microbiology and Food Science and was the 2001-2002 Chair of the Education Committee of the Master Brewers Association and President of the American Society of Brewing Chemists from 2005-2006.<\/li> <li>Greg recently released the first volume in his history of American Lagers: <a href=\"https:\/\/my.mbaa.com\/ItemDetail?iProductCode=25505X\" target=\"_blank\" rel=\"noreferrer noopener\">Insipiring History and Legacies of American Lager<\/a><\/li> <li>Greg and I discuss the launch of his first volume history of American Lagers as well as the upcoming release of the second volume.<\/li> <li>We talk about Process Control for DMS, and Greg&#8217;s history working the DMS problem for large breweries.<\/li> <li>We discuss how reducing DMS is an important feature of American Lager beers &#8211; especially in the light variants.<\/li> <li>Greg explains the two competing theories on how and where DMS is introduced in brewing and where the best points in the process are to reduce it.<\/li> <li>We talk about how DMS first got on Greg&#8217;s radar screen and his in-depth dive into its causes.<\/li> <li>Greg talks about his experience looking at DMS from a practical perspective and how even tiny changes in the equipment and process can cause DMS to rise.<\/li> <li>We discuss some of the things Greg learned working with DMS, as well as what his believe is on the best control points to reduce it.<\/li> <li>We discuss Quality at the Source and its impact.<\/li> <li>Greg shares his thoughts on Dr Bamforth&#8217;s perspective on DMS and how he believes DMS can best be controlled in the early parts of brewing as opposed to fermentation. For reference, here&#8217;s the <a href=\"https:\/\/beersmith.com\/blog\/2024\/01\/23\/dms-in-beer-with-dr-charlie-bamforth-beersmith-podcast-296\/\" target=\"_blank\" rel=\"noreferrer noopener\">earlier episode on DMS I recorded with Dr Bamforth referenced in the show<\/a>.<\/li> <li>Greg provides us with a quick reference on how to get his 5 volume set (the first one is linked above).<\/li> <li>He shares his closing thoughts.<\/li>\n<\/ul> <h3 class=\"wp-block-heading\" id=\"sponsors\">Sponsors<\/h3> <ul class=\"wp-block-list\">\n<li>Thank you to our sponsor <a href=\"http:\/\/beerandbrewing.com\">Craft Beer and Brewing Magazine<\/a> for sponsoring this episode. I encourage you to subscribe to their great magazine!<\/li> <li>Also check out <a href=\"http:\/\/beersmith.com\">BeerSmith<\/a>, <a href=\"https:\/\/beersmithrecipes.com\" target=\"_blank\" rel=\"noreferrer noopener\">BeerSmith Web<\/a>, <a href=\"http:\/\/beersmith.com\/mobile\">BeerSmith Mobile software<\/a> and the <a href=\"http:\/\/beersmith.com\/dvd\">DVDs John Palmer and I filmed<\/a> &#8211; How to Brew with Malt Extract and How to Brew All Grain are available now. You can <a href=\"https:\/\/beersmith.com\/blog\/subscribe\/\">subscribe to the BeerSmith newsletter<\/a> for free to get some great articles on home brewing.<\/li>\n<\/ul> <p class=\"wp-block-paragraph\"><br \/><strong>iTunes Announcements<\/strong>: I launched a new <a href=\"https:\/\/itunes.apple.com\/us\/podcast\/beersmith-home-beer-brewing\/id824963861\">video channel for the BeerSmith podcast on iTunes<\/a>, so subscribe now! At the moment it will only feature the new widescreen episodes (#75 and up). Older episodes are available on my revamped <a href=\"http:\/\/youtube.com\/mrbeersmith\">Youtube channel<\/a>. Also all of my <a href=\"http:\/\/itunes.apple.com\/podcast\/beersmith-home-brewing-blog\/id398500515\">audio episodes are on iTunes<\/a> now &#8211; so grab the older episodes if you missed any.<\/p> <h3 class=\"wp-block-heading\" id=\"thoughts-on-the-podcast\">Thoughts on the Podcast?<\/h3> <p class=\"wp-block-paragraph\">Leave me a comment below or visit our <a href=\"http:\/\/beersmith.com\/forum\">discussion forum<\/a> to leave a comment in the podcast section there.<\/p> <h3 class=\"wp-block-heading\" id=\"subscribe-to-the-podcast-on-itunes-or-beersmith-radio\">Subscribe to the Podcast on iTunes or BeerSmith Radio<\/h3> <p class=\"wp-block-paragraph\">You can listen to all of my podcast episodes streaming live around the clock on our <a href=\"http:\/\/BeerSmith.com\/Radio\">BeerSmith Radio<\/a> online radio station! You can also subscribe to the audio or video using the iTunes links below, or the feed address<\/p> <ul class=\"wp-block-list\">\n<li><strong>Audio feed on iTunes &#8211; <\/strong><a href=\"http:\/\/itunes.apple.com\/podcast\/beersmith-home-brewing-blog\/id398500515\"><\/a> (direct: <a href=\"http:\/\/beersmith.com\/content\/feed\/podcast\"><strong>http:\/\/beersmith.com\/content\/feed\/podcast<\/strong><\/a>)<\/li> <li>Video feed on iTunes &#8211; <a href=\"https:\/\/itunes.apple.com\/us\/podcast\/beersmith-home-beer-brewing\/id824963861\"><\/a> (direct: <strong><a href=\"http:\/\/beersmith.com\/tv\/category\/podcast\/feed\/\">http:\/\/beersmith.com\/tv\/category\/podcast\/feed\/<\/a><\/strong> )<\/li> <li><strong>Audio podcast <a href=\"https:\/\/podcasts.google.com\/?feed=aHR0cDovL2JlZXJzbWl0aC5jb20vY29udGVudC9mZWVkL3BvZGNhc3Qv&amp;hl=en\">on Google Play here<\/a><\/strong><\/li>\n<\/ul> <p class=\"wp-block-paragraph\">And finally, don&#8217;t forget to subscribe to the blog and <a href=\"https:\/\/beersmith.com\/blog\/subscribe\">my newsletter<\/a> (or link at the top of the page) \u2013 to get free weekly articles on home brewing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tweet This week Dr Greg Casey joins me to discuss Dimethyl Sulfide (DMS) in lagers, and how process control can 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