What are the main techniques used in the production of Biogas2012-04-27
5 water sealing tankWhen the pool fermentation temperature rise to 40-60 DEG C, the inlet and outlet water, and then use the pH value, if the pH value is above 6.8. The activity can be cover and seal pool, if less than 6.8, can be added to the amount of plant ash, ammonia or clarifying lime water adjusted to about 7, and then closed the pool then will be timely delivery pipe, a switch and a lamp, the stove is installed, and close the switch on the transmission pipe.
3 concentration and waterThe biogas pool first feeding amount should be the pool volume of 80%, the maximum is 85%, the concentration to 6%-12% suitable to the calculation of total solid content of raw materials, the summer is not less than 6%, less than 12% in winter, 6 cubic meters of biogas digesters and 4.8-5.1 cubic meters, 8 cubic meters of pool with 6.4-6.8 cubic meters, 10 cubic meters of pool with 8-8.5 cubic meters.
2 raw material pretreatmentThe first is the straw pool retting, will cut short pieces (2-3 inch) of the crop straw and livestock manure into liquid, mixing evenly, covered with plastic film, the spring and summer autumn and winter composting composting 4-5 days, 6-7 days, then when the inoculum is less than 10% or the raw material is dried dung, fresh manure, sheep manure fresh poultry manure must, before entering the pool to pretreatment, fermentation bacteria can make a lot of growth and reproduction, slow acidification, and can prevent the crust or excessive acid production, dry stool or analgesia method is horse manure, chicken manure and other fresh water. The amount of water in the heap is not suitable for water, and stamped with the plastic film, so as to accumulate the heat and strain breeding, the temperature at 15 degrees Celsius retting 3-4 days, temperature at 20 DEG 2-3 days of retting. At the end of the pool retting, mix the raw material fermentation digester top day window join, by feeding, compaction, general spring and summer composting 2-3 days, 4-6 days in autumn and winter composting.
Biogas production technology1 Preparation and preparationPreparation is the key technology of biogas fermentation, biogas production of raw materials to have the characteristics of wide source, large quantity, such as human and animal excreta, crop straw, weed leaves, sewage and organic waste water are used as raw materials of biogas fermentation, biogas pool is usually a 8-10 cubic meters of the need for a family of three, pig 4-6 first, every year at least have more than 500 kilograms of crop straw as raw material for biogas production. The ingredients are strictly according to the carbon to nitrogen ratio 20-30:1, the same is preparing to join the rich inoculum (strain), in order to adapt to the requirements of biogas fermentation.
