First, the conditions required for the preparation of biogas Biogas fermentation is completed by a variety of bacterial groups to participate in the metabolism and growth and reproduction of biogas digesters in the process, the need for certain conditions, only the use of artificial to create suitable growth conditions, so that A large number of microorganisms multiply rapidly, accelerating the decomposition of organic matter in the pool. On the other hand, controlling the normal operation of the fermentation process in the digester also requires certain conditions. Taken together, the basic conditions for artificially preparing biogas are: biogas bacteria, sufficient raw materials for fermentation, moisture, appropriate pH, strict anaerobic environment, and appropriate temperature. If one of these conditions is not suitable for biogas bacteria, it will not produce biogas.
1, biogas bacteria Biogas production must have biogas bacteria, and it must have the same yeast yeast. If there are no biogas bacteria, the organic matter in the digester itself will not turn into biogas.
Biogas fermentation must have a sufficient quantity of inoculants of biogas species, which is an important condition for biogas production. Jinbao Biogas Fermentation Agents Jinbao Biogas Fermentation Aids contain nutrients and trace elements required for the growth and reproduction of methanogens. The use of trace elements in them effectively stimulates methanogens and promotes their rapid propagation. At the same time, they increase the activity of enzymes and accelerate the reaction of enzymes. Speed, accelerate the degradation and decomposition process of macromolecule compounds such as cellulose; use the nutrients necessary for the propagation of bacteria added in the product to better grow bacteria species; use a mixture of sorbents to increase the contact area between bacteria and raw materials The process of adding biogas fermentation to the fermentation auxiliaries is called inoculation. The new biogas digester is loaded at one time. If you do not add enough inoculants containing biogas bacteria, it is often difficult to produce gas or the rate of gas production is low, and the methane content is low and cannot be burned. . The addition of an appropriate amount of inoculum is an important measure to avoid excessive production of acid during the initial stage of fermentation in a biogas digester, resulting in impaired fermentation.
2. Adequate fermentation raw material Biogas fermentation raw material is the material basis for producing biogas, and it is also the source of nutrients for biogas fermentation bacteria to survive. Because biogas bacteria grow and multiply in the digester, they must absorb enough nutrients such as water, carbon, nitrogen, inorganic salts, and a lot of elements such as sulfur, phosphorus, sodium, calcium and magnesium from the raw materials for fermentation. Life activities, multiplication of bacteria and conversion of biogas.
3, water biogas bacteria not only to "eat", but also "drink." Biogas bacteria need enough water during growth, development and reproduction. According to many years of practice, the rural biogas digesters generally require 90-95% of the water content of the fermentation raw materials. Within this range, the initial amount of water added to the digesters should be more, which is easy to start, and there are summer and early autumn pool temperatures. High, the decomposition of raw materials is fast, the amount of water can be more. In winter and early spring, the temperature of the pool is low, the decomposition of raw materials is slow, and the moisture should be kept at 90%.
4. Appropriate acidity and alkalinity Biogas bacteria have stricter conditions for its living environment. Acidity or alkalinity will affect the activity of biogas bacteria. Biogas bacteria can only grow normally if they are in a neutral and slightly acidic environment. That is, PH6.8-7.5, 6.4 or less or 7.6 or more all have inhibitory effects on gas production. If the pH is below 5.5, it is the sign of acidification of the feed and its methanogen activity is completely suppressed. For example, when the digester is initially started up, the feed concentration is too high, the amount of methanogens in the inoculum is insufficient, or a large amount of chicken manure and potato waste are added in the digester at a time, resulting in a high concentration of the fermented feed liquid, which will result in acid production. The rate of methanogenesis is disproportionate and causes the accumulation of volatile acids, resulting in a decrease in the pH. This is the main reason for the failure or malfunction of the biogas digesters.
5. Strict anaerobic environment Biogas fermentation plays a major role in anaerobic and methanogenic bacteria. They are afraid of oxygen and will die in the air for a few seconds. That is, the oxygen in the air is toxic to them. Therefore, a strict anaerobic environment is one of the most important conditions for biogas fermentation. According to the characteristics of biogas bacteria that are afraid of air, we must build a biogas digester that must be tightly closed to ensure that it does not leak water and leak gas, and that it guarantees the normal life metabolic activities of biogas bacteria and the storage of biogas.
6, the appropriate temperature The temperature of the fermentation broth in the digester has a great impact on the generation of biogas. This is because the temperature is higher at a suitable temperature, the faster the growth and reproduction of the biogas bacteria, the more the gas production; Biogas fermentation auxiliaries use the heat of adsorption to increase the temperature of the methanogens, increase the heat, promote the rapid growth of biogas bacteria, and promote the production of biogas digesters faster and more. If the temperature is not suitable, biogas bacteria will grow slowly and produce little or no gas. In general, biogas bacteria can be fermented in the 8-60°C range. Biogas fermentation is usually divided into three fermentation zones, ie, normal temperature fermentation zone 10 -20°C, medium temperature fermentation zone 28 -38°C, and high temperature fermentation zone 46 -60°C. Because of the limited conditions, normal temperature fermentation is generally used. In winter, the temperature of the pool is low and there is little gas production. In order to increase the temperature of the digester, the biogas digester is used to produce gas all the year round. In the winter, the biogas digester should be covered. Conditional farmers can build the digester below the pigsty to achieve annual production of gas. Details can be consulted: Beijing Huaxia Kangyuan Technology Co., Ltd. Tel Free Hotline Taobao Buy Click
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