STRABAG manufacturers believe that kitchen waste, as the main urban organic solid waste, has caused tremendous pressure on society and the environment. Its characteristics of high water content, high organic matter and easy degradation are very suitable for anaerobic fermentation. Compared with the traditional wet fermentation, dry anaerobic fermentation is more suitable for treating a large amount of food waste. However, in the process of dry anaerobic fermentation of kitchen waste, there are problems such as volatile fatty acid (VFA) accumulation, difficult stirring and poor mass transfer, which affect the stability and gas production efficiency of the system.

　　STRABAGThe manufacturer thinksFood waste, as the main organic solid waste, has caused great pressure on the society and the environment. Its characteristics of high water content, high organic matter and easy degradation are very suitable for anaerobic fermentation. Compared with the traditional wet fermentation, dry anaerobic fermentation is more suitable for treating a large amount of food waste. However, in the dry anaerobic fermentation process of food waste, volatile fatty acids(VFA) accumulation, mixing difficulties, poor mass transfer and other issues, affecting the stability of the system and gas production efficiency.

　　STRABAGThe manufacturer thinksAt present, the anaerobic fermentation of kitchen waste in China mostly adopts the medium temperature continuous stirring wet anaerobic fermentation process. However, there are also shortcomings such as complex pretreatment, easy scum, large water consumption, complex biogas slurry treatment, low durability load and poor economy. Compared with wet anaerobic fermentation, dry anaerobic fermentation reactor has the advantages of small volume, small footprint, high volumetric gas production rate, low heating energy consumption and low total methane loss. Less water consumption, wet anaerobic fermentation without scum, precipitation and other problems; easy post-processing, biogas residue can be directly used as organic fertilizer. Therefore, dry anaerobic fermentation is more suitable for the treatment of a large number of organic solid waste such as kitchen waste, and has broad application prospects.

　　STRABAGThe manufacturer thinksDue to its high water content, high organic matter and high oil content, there are two major problems in the practical application of anaerobic fermentation, namely, poor system stability and low reactor efficiency. Because the organic matter contained in the kitchen waste is easy to degrade, it is easy to accumulate volatile fatty acids in the process of anaerobic fermentation.(VFA), leading to acidification of the system. STRABAGThe manufacturer thinksThe content of oil and protein in food waste is high, but the content of carbon and nitrogen is low, which easily leads to the accumulation of ammonia nitrogen, hydrogen sulfide and long chain fatty acids. These will reduce the stability of the system and gas production, and may lead to direct system failure.

STRABAGThe manufacturer thinksThe low-load anaerobic fermentation system has a small daily waste treatment capacity, which not only cannot meet the needs of kitchen waste treatment, but also has low economic benefits, which is not conducive to the long-term operation of the project. In addition, there is a foaming problem in the engineering application of anaerobic fermentation of kitchen waste. Due to the high content of protein and crude fat in food waste, it is easy to produce bubbles in the fermentation system, resulting in a series of problems such as pipe blockage, reactor explosion, uneven substrate concentration in the reactor, and methane production decline, which seriously affect the stability and economic benefits of the fermentation system. Therefore, it is necessary to control and reduce bubbles in anaerobic fermentation.

The above are some knowledge points about dry anaerobic. I hope you can seriously study and understand the relevant knowledge, choose the products and equipment suitable for your needs, and ensure your own benefits. If you want to know more details, you can contact us.