Technical Process and Treatment Plan for Farmland Project of Turning Manure to Organic Fertilizer
Taking livestock and poultry manure as the main raw material, adding a certain proportion of straw, pruning, mushroom residue and other auxiliary materials, and inoculation of compost inoculant, through the “high temperature aerobic rapid composting technology” to achieve full maturity. Then through the “bio-organic fertilizer processing Technology to produce commercial organic fertilizer, bio-organic fertilizer, organic-inorganic compound fertilizer and compound microbial fertilizer and other products, in order to achieve the harmless treatment and resource utilization of aquaculture waste.
The purpose of aerobic composting is to reduce the volatile substances in the waste, reduce the odor, kill the parasite eggs and pathogenic microorganisms, and achieve the purpose of harmlessness. In addition, the composting fermentation process reduces the moisture content of the organic material, and the organic matter is decomposed and mineralized to release N, P, K and other nutrients, and at the same time the properties of the organic material become loose and dispersed. Process: On the one hand, the fermenting material is thoroughly mixed by turning the mixer, the water is quickly volatilized, and the displacement of the material occurs at the same time; on the other hand, the aeration system installed at the bottom of the fermentation tank adopts forced ventilation to supply oxygen, avoiding The composting process forms an anaerobic environment while volatilizing moisture. In the process control, according to the changes of the temperature, moisture, oxygen content and other parameters of the compost material, the central control system turns on the blower to aerate into the fermentation tank. Under normal circumstances, the composting cycle is 18 days, and the composting temperature can rise to 60-70 ℃ for more than 10 days. After one cycle of composting, the water content after fermentation is greatly reduced (generally down to about 40%), and the transfer machine is transported by conveyor to the workshop.
Purpose: The organic solid waste after the first composting fermentation has not yet reached the maturity, and it is necessary to continue the secondary fermentation, that is, ageing. The purpose of ageing is to further decompose, stabilize and dry the remaining macromolecular organic matter in the organic matter to meet the requirements of the subsequent fertilizer manufacturing process.
Process: Most of the organic matter has been degraded in the late composting stage. Due to the decrease of organic matter and the accumulation of metabolites, the growth of microorganisms and the decomposition rate of organic matter are slowed down, and the fermentation temperature begins to decrease. At this time, the material in the fermentation tank is moved by a belt conveyor. The ageing plant conducts secondary fermentation. In the Chenhua workshop, a static warehouse-type aging process is adopted. At the same time, an aeration system is installed at the bottom of the aging tank, and forced ventilation is used to supply oxygen to avoid an anaerobic environment during the composting process. When necessary, the tank is cooled to ensure rapid cooling of the pile and reach Stable state, avoiding high temperature carbonization and volatilizing moisture. The aging cycle is about 0-25 days, and the temperature of the compost gradually decreases. When it is stable at 40℃, the compost is decomposed and forms humus.
Composting should be processed as a product, and should be processed according to the use and market needs. The purpose of fertilizer production is to improve the fertilizer efficiency and commerciality of compost products, and thus improve the overall economic benefits.
Process: The fermented materials are compounded by the batching system, compounded with humic acid, NPK fertilizer, trace elements and microbial bacteria, so as to produce different high value-added organic/bio-organic fertilizer products according to market demand; After lifting, conveying, crushing, stirring, mass, drying, cooling, sieving and grading, the sieved material is returned to the mixing room, and the powdered part is conveyed by the belt conveyor for packaging, and the finished product is stored in the finished product warehouse.
(1) Treatment process consists of pretreatment system, fermentation system, ventilation and aeration system, deodorization system, central control system, and fertilizer processing system. And it can be flexibly combined according to the amount of processing;
(2) The fermentation process uses forced ventilation dynamic fermentation, forced ventilation is intermittent segmented aeration, ensuring proper supply of oxygen during fermentation, maintaining high activity and efficiency of microorganisms, stable product quality, fermentation cycle of 18 days, and tradition Compared with 40 days of composting cycle, the efficiency is obvious;
(3) The automatic feeding and discharging system can realize the mechanization of the whole process of material conveying and loading and unloading, including the feeding belt conveyor, the moving cloth belt conveyor, the discharge belt conveyor, etc.; the system can reduce the personnel and transportation vehicles in the workshop and reduce operating costs.
(4) The project product has high degree of harmlessness, requiring the removal rate of parasitic eggs and pathogens to be over 99%, completely decomposed, and at the same time exerting the characteristics of raw materials, compounding humic acid, NPK fertilizer, trace elements and microbial bacteria, etc. According to the market demand, we will develop special products for local characteristics and market-specific fertilizers to meet the needs of market.