At present, the application of biogas is becoming more and more extensive, bringing more convenience and benefits to the general users. However, when the weather is cold in winter, most users respond to biogas digesters that produce less gas, produce slower gas, and even produce no gas. This is What's going on, is it because of the cold weather alone? In fact, some users lack knowledge of biogas technology because of improper management, resulting in biogas digesters not producing gas. How to solve this problem? Many years of practice have proved that in the case of good management, the use of Dynamite biogas materials, fast rotants and biogas fermentation agents can effectively solve the problems of slow gas production, low gas production, and no gas production in biogas digesters. 1, too much or too little raw material for fermentation. The feed liquid must maintain a certain concentration in the fermentation process to produce gas normally. Usually, the concentration of the fermentation feed liquid is 6%-10%. Due to the rapid propagation of acid-producing bacteria in the fermentation process and the slow propagation of methanogenic bacteria, the decomposition and digestion rate of raw materials exceeds the gas production rate. Therefore, when the fermentation raw materials are too much and the concentration of the fermentation broth is too large, it will easily cause a large accumulation of organic acids. Impaired fermentation. On the contrary, if the concentration of the fermentation broth is too thin, the content of organic matter is small and the amount of gas production is small. The mastery of fermentation raw materials and the adjustment of the carbon-nitrogen ratio of raw materials have been introduced above. Here are the two main solutions: Recommended reading
Structure and composition: Composed of one or more medical device products.
Product performance: Hemostasis and bandage treatment for minor injuries to prevent wound infections. For serious injury accidents, hemostasis and other protective measures are taken for the first time to minimize the death rate of severely injured people and strive for first aid time before the arrival of ambulance personnel.
Product standard: Cloth packaging, including medical non-woven fabric sheet, medical bandage, medical breathable tape, emergency blanket, disinfected band-aid, alcohol pads, scissors, etc.
Scope of application: It can be used for emergency rescue in the event of accidents such as cars, homes or workplaces.
First Aid Kit,First Aid Box,First Aid Bags,First Aid Related Products Shaoxing Gangfeng Hospital Products Co.,Ltd. , https://www.gangfenggauze.com
2. The raw material of fermentation is directly processed into the pool without pretreatment. This phenomenon is more common. Due to the low temperature of fermentation in the tank compared to the stacking outside the tank, the methanogenic bacteria are multiplying slowly and in small numbers, resulting in the biogas pool not producing gas for a long time.
3, the raw material carbon nitrogen ratio is not suitable. Normal biogas fermentation requires a certain carbon to nitrogen ratio. In practical applications, the carbon-nitrogen ratio of raw materials is suitable for 20-30:1. When raw materials such as pig feces, chicken feces, and human feces are used alone to ferment the raw materials having a low carbon-nitrogen ratio, such raw materials are easily acidified in the case of a small amount of biogas bacteria, so that the fermentation cannot be performed normally.
4. The nutrients in the input fermentation tank have been exhausted. Some farmers use the excrement piled up for a long time when starting the biogas digester. Because the excrement has naturally fermented during the long-term stacking process and is depleted of nutrients, it cannot produce gas.
In addition, the fermentation raw material is crusted, the PH value of the fermentation tank, the coldness of the added water or the low temperature of the capping start will affect the gas production of the digester.
1. The fermentation raw material is pretreated. Biogas materials generally include crop stalks, rice straw, leaves, and feces. If lignin, cellulose, hemicellulose, pectin, and waxy compounds in the straw are not destroyed by treatment, they are likely to be crusted and affect gas production and gas production. effectiveness. So you need to preprocess the material:
(1) Smash the material. Straw or straw 10-15 (dry weight about 1-2 tons) first crushed, and then 2.5 kg of urea (250 kg of poultry manure can also be used instead) 150-200 kg of water made of urea water, evenly spilled In the straw material.
(2) Water content control. The moisture content of the material is required to reach about 65% (whether the water is suitable or not is judged by hand: grasping a handful of material, see the water is not dripping, and it is appropriate to fall into the ground).
(3) Construction of materials. Wait until the urea water penetrates the material, and then put it into a large pile (1 meter high, 1.5 meters wide, long arbitrary), must be side pressure, try to reduce the volume. Cover it with a breathable cover and place it naturally for 12-24 hours. On the second day, mix 1 kg of golden treasure biogas material rot and 5-10 kg of rice bran (or bran, corn flour) and mix evenly, then spread evenly on the already piled straw material, so that it can be flanged. . After spreading the golden baby fermentation strain, cover it with a breathable cover to protect it from light and rain.
(4) The fermentation is completed. Stacking time is 2 to 3 days in summer and 3-5 days in winter. When the stack is hot and hot (50～60°C), it can be piled up once and put it into the heap outside the pile, and add some water (not too much). Most of the straw color is soft from yellow to black Or it becomes brown and it is broken by hand. At this time, it can be put into the digester to produce gas.
Pre-treated materials put into biogas digesters will rapidly produce gas, prevent crusting, and greatly increase gas production and gas production efficiency.
2. Add biogas fermentation agent. When adding biogas fermentation raw materials, add the biogas fermentation agent, add 200-500 grams of biogas fermentation agent per cubic meter of biogas digester, and mix the fermentation raw materials and the fermentation agent into the pool. Because the fermentation agent contains methanogenic bacteria, it needs to grow and reproduce. The use of nutrients and trace elements to catalyze the growth of methanogens and promote their rapid propagation. At the same time, they increase the activity of enzymes and speed up the reaction of enzymes, and accelerate the degradation and decomposition of macromolecular compounds such as cellulose. The nutrients necessary for the propagation of the added bacteria will better enable the growth of the bacteria species; the use of a mixture of adsorbents to increase the contact area between the bacteria and the raw materials, and the use of an adsorption exotherm to increase the temperature of the methanogens, increase the heat, and facilitate the rapid development of the digester Gas production.
In addition, we must also do a good job of insulation work, cover the plastic film before entering the winter, can increase the liquid temperature in the shed, the digester, and create favorable conditions for the increase of biogas production in winter. Details can be consulted: Beijing Huaxia Kangyuan Technology Co., Ltd. Tel Free Hotline Taobao Buy Click
1, biogas fermentation agent for biogas digesters can quickly start in winter?
2. Problems and solutions in the use of biogas
First Aid Kit