Become a channel member and receive exclusive benefits: / @agricultureforestry Current video lead time over 1 month - • Members-only videos Digestate is the liquid or solid residue that remains after biomass is fermented in a biogas plant. Because of its high nutrient content, it is mostly used as agricultural fertilizer. The term biogas slurry or fermentation product is also used. For the fermentation residues from ethanol production from grain, however, the term stillage is usually used. A wide variety of substrates are used in biogas plants, such as liquid manure, corn silage or organic waste. These contain water and organic compounds such as carbohydrates (sugar, starch, hemicellulose, cellulose), proteins, fats and other compounds in varying proportions. A large proportion of these organic compounds are broken down by microorganisms during the anaerobic biogas process. The most important degradation products in biogas are methane (CH4) and carbon dioxide (CO2). In addition, small amounts such as hydrogen sulphide (H2S) and ammonia (NH3) are initially contained.[1] The degradation processes turn the viscous to solid substrate into liquid to viscous digestate with a high water content. Since only small amounts of NH3 escape from the substrate, most of the nitrogen (around 3.4 to 5.0 kg/m3) remains in the digestate. The degradation processes reduce the proportion of nitrogen bound in the organic matter, while the proportion of NH3 increases - 45 to 76 percent is present as ammonium nitrogen. Since the pH value shifts from neutral to the slightly basic pH range (pH 8 to 8.5) during fermentation, the equilibrium also shifts from the easily soluble ammonium NH4+ to NH3. When storing and applying the digestate, there is therefore a higher risk of ammonia being released into the atmosphere. One positive aspect is that nitrogen in this form is more quickly available to plants. However, if the plant's needs are low, the nitrogen applied may not be used effectively. Plant-available potassium and phosphorus contents are given as around 1.8 to 3.5 kg/m3. Depending on the process used to desulfurize the biogas, a large part of the sulfur can also be returned to the digestate.[1] Other nutrients added with the substrate, such as phosphorus, potassium, magnesium, calcium, etc., also remain in the digestate.[3] After fertilization with digestate, the microbial activity of the soil is increased for around 9 to 10 weeks. Earthworms, on the other hand, avoid soil fertilized with large amounts of digestate. The low viscosity of the digestate compared to liquid manure is viewed positively, which means it penetrates the soil more quickly and thus reduces emissions. As fertilizer in arable farming, fermentation residues can largely replace mineral fertilizers (e.g. in summer wheat) or supplement them (e.g. corn), depending on the crop. The fertilizing effect in terms of nitrogen is usually well over 70% of the corresponding amount of mineral fertilizer - depending on the crop. The supply of organic matter through fertilization with fermentation residues is only low, the humus requirement of the soil cannot be met by fermentation residue fertilization. The heavy metal content of fermentation products is so low that it does not pose a problem for agricultural use. The salmonella contamination of fermentation products from biogas plants is at a low, hardly worrying level, the clostridial contamination is the same as that of untreated liquid manure. The transmission of plant diseases through fermentation residues is also not to be expected.[2] My equipment *DJ Phantom 4 Pro Plus https://amzn.to/3J1Ph26 *Panasonic 1500 https://amzn.to/3K3P7YB *Lumix FZ 2000 https://amzn.to/3rsPbut *GoPro Hero10 https://amzn.to/3GyiC2A *GoPro Hero 7 https://amzn.to/34u4YA2 *IPhone 13 https://amzn.to/3gpgbEA *Tripod https://amzn.to/3B0QK5N *Stabilizer https://amzn.to/3rqnEK5 *Computer https://amzn.to/3sb2yyq The links marked with an asterisk are affiliate links. By purchasing via these links you support the channel without having to pay more. 🔸Other facts: - Recording time: approx. 1 day(s) Processing time: approx. 16 h ------------------------------------------------------------------------------------------------------------- You want to support me? My Paypal donation account:https://www.paypal.com/cgi-bin/webscr... 🔹MUSIC: Soundtaxi.net, Audiojungel Editing program: Video: Movavi Video Editor Plus 2022 Camera: Richard J. Editing: Richard J.