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aerobic vs Zanaerobic vs semi@@

Z
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topik ini sering dibahas setengah-setengah. orang sudah tahu 'anaerobic bagus' tapi tidak banyak yang paham mekanisme kenapa oksigen itu penting dikontrol dan apa bedanya secara konkret.

yang gw pahami dari beberapa literature dan eksperimen kecil sendiri:

aerobik (tangki terbuka biasa): dissolved oxygen masih ada di level normal sekitar 8 mg/L. Acetobacter dan Gluconobacter aktif, produk utama asam asetat. ini yang kasih brightness khas di washed yang bagus tapi juga yang bisa jadi masalah kalau timing lewat karena arah over-ferment itu ke rasa cuka.

anaerobic (tangki sealed): dissolved oxygen turun dari nilai awal ke mendekati nol dalam 6-12 jam pertama sesuai data yang Cenicafe Colombia dan IHCAFE Honduras dokumentasikan. Lactobacillus mengambil alih, produksi asam laktat lebih dominan, ethyl lactate yang terbentuk itu yang kasih fruity-creamy notes di cup.

semi-anaerobic: ada gas exchange terbatas, hasilnya middle-ground. bisa jadi hybrid yang menarik, bisa juga tidak jelas karakternya kalau tidak dikelola dengan benar.

satu hal yang gw perlu stress: tangki sealed yang tidak ada pressure relief valve itu berbahaya. CO2 buildup dari fermentasi itu nyata, bukan theoretical. ada beberapa insiden di processing station di Amerika Selatan dengan tangki yang tidak memiliki pressure management yang proper. ini bukan scaremongering, ini real operational risk.
6 Replies
R
satu minggu yang lalu
added problems dissolved oxygen: transition from aerobics to anaerobic that didn't happen in uniform throughout the tank. There's a transition phase that depends on the size of the tank, the density of cherry, and the initial yeast / bacteria population that exists in the cherry of that garden. In practice, even the tanks that are considered sealed, if any microleaks or tanks are too large, the volume is relative to the contents of Zcherry, there is still a residual aerobic activity in particular areas. This is what makes the profile not always pure. anaerobic.
N
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anaerobic is clearly superior to ordinary washed. All the serious producers are now using anaerobic because it consistently scores higher at Zcupping. Still wearing it open means outdated.
I
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it's an oversimplification that's just dangerous to deliver to the new grower to begin with.

The real washed clean with good timing control could still be scoring 88-90 and Marketable to the buyer looking terroir expression. Kenya washed, Ethiopia Yirgachheffe washed, Colombia washed premium, all of which was an active and healthy market that didn't want the product to be changed to Zanaerobic for losing the original characters they bought.

anaerobic is not automatic superior. It's only late. And processing error at anaerobic is harder to detect until the cupping station, unlike the wasched errors faster to be seen from smell and pH during the process. The risk of profiling is different.
L
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question may be basic, but could it not be aerobics and anaerobic Zfermentation that was detected from appearance or aroma during the process? Or should we wait until the end of cupping?
P
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can be detected during the process as well. Aerobics usually have foam on the surface of fermentation after the first 12-24 hours, it's a sign of intense yeast activity. anaerobic no foam on the surface due to no air contact, but if the tank cap opens there is hissing from CO2 coming out. The amell check: aerobics are running right. Smells fermented. anaerobic from first day already more intense, fruity-winey, sometimes a little bit like yogurt on day two. If those two methods already have a strong smell of vinegar, it's warning sign over-fermentation in both cases.
S
satu minggu yang lalu
added to the problem of safety being delivered in the initial post: pressure relief valve is not optional if you seriously want to set up anaerobic ZZZCF003Z. Make sure this equipment exists and works before first use it. Test it with water only, see if valve responds properly when there's pressure. CO2 buildup from fermentation coffee in covered tank medium size to large within 2448 hours it cannot be underestimated. The food- grade material is also important, there are ordinary plastic tanks that can deform or release chemistry into products.

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