Multi functional foliar fertilizer can be prepared from seaweed waste liquid

China is rich in algae and rare earth resources This technology is an innovative research achievement of Ocean University of China There is no similar product to compete with at home and abroad According to the pilot production and application, the cost of producing the biological agents needed for one mu is only about 1.5 yuan, but the yield can be increased by 2-25% The average value of grain crops and cash crops per mu will increase by about 100 yuan based on the value-added 10% In addition, it can reduce the organophosphorus pesticides in food and ensure the safety of food Therefore, this technology is a good technology to turn waste into treasure, realize the full and clean utilization of resources, and provide a new way for the quantity safety and quality of food in China; it is also the core technology urgently needed to enhance the competitiveness of seaweed enterprises The technology has the following advantages: ① high product safety, no secondary pollution ② The utility model has the double functions of removing pesticide residues and promoting crop growth, avoiding the contradiction that the pesticide is needed to increase crop output, and there is a potential safety hazard of pesticide residues after using the pesticide ③ The project realizes the comprehensive utilization of resources ④ Products are widely used Therefore, the risk of this technology is very small Technical introduction: at present, the chemical enterprises in kelp have not used the waste after extracting mannitol and iodine, but discharged it after anti pollution treatment This part of waste discharge is very considerable every day For example, Qingdao Mingyue group discharges more than 100 tons of waste liquid containing alginate starch, fucoidan and other ingredients every day, which not only increases the cost of pollution prevention, but also causes waste of resources If the waste liquid discharged from kelp processing can be used in a clean and high value way, the environmental treatment cost of the waste can be reduced For example, Qingdao Mingyue seaweed Group Co., Ltd can reduce the cost by tens of thousands of yuan per day If the waste can be produced into multi-functional foliar fertilizer, according to the pilot test, only Qingdao Mingyue seaweed Group Co., Ltd can produce 50 tons of multi-functional foliar fertilizer per day For fertilizer, the unit price per ton is 5000 yuan, which can be increased by 250000 yuan, and the annual increase is about 100 million yuan It can be seen that the breakthrough and application development of this technology can not only bring considerable economic and social benefits to seaweed enterprises, but also solve the bottleneck problem of long-term development of enterprises The promotion and application in the same industry in China can significantly promote the rapid development of seaweed processing industry in China, have obvious radiation and driving effect on Technological Development and industrial upgrading, and have obvious economic and social benefits China is rich in marine polysaccharides and rare earth resources The basic research on the application of marine polysaccharides has found that, in addition to its biological activities, fucoidan and the oligosaccharides obtained from its hydrolysis are used in agriculture, which can significantly promote the growth of crops and induce the resistance of crops It is a new type of biopesticide The basic research of rare earth application shows that rare earth elements (REE) have many biological activities, such as enhancing the resistance, disease resistance, anti-inflammatory, regulating immune function and inhibiting tumor of animals and plants Rare earth agriculture is the first one in China It has been proved that REE is a beneficial element for animals and plants The application of REE has become one of the effective measures to increase production and improve quality in China's planting and breeding industries However, REE is easy to precipitate as insoluble colloid under neutral condition At present, rare earth nitrate is mainly used in agricultural production, but the amount is large Since REE is not an essential element of animals and plants, its residue in food is limited to a certain extent (2.0mg / kg) Wang Dongfeng of Ocean University of China found that rare earth in plants such as tea and kelp can coordinate with polysaccharides in vivo to form natural polysaccharide rare earth complex Wang Dongfeng and other researchers also found that cerium has a strong degradation effect on phosphate ester bond when combined with brown algae starch For example, it takes 2 million years for phosphate diester bond to hydrolyze without hydrolase in natural state, but more than 60% of the cerium complexes of brown algae starch are degraded in 30 minutes under neutral physiological conditions The above results suggested that the polysaccharide Cerium Complex had degradation effect on organophosphorus pesticides In 2005, Qingdao Academy of agricultural sciences applied the polysaccharide rare earth complex developed by Ocean University of China to vegetables The results showed that the dry weight of the compound was increased by 12.48%, the degradation rate of chlorpyrifos, an organophosphorus pesticide, was 0.541mg/kg, and that of Omethoate was 56.93%, and that of Omethoate was 0.161mg/kg, and that of Suzhou green was 0.243mg/kg, and that of chlorpyrifos was 33.74% Recently, Wang Dongfeng et al Used brown algal starch and tea polysaccharide as ligands to coordinate with rare earth ions to obtain polysaccharide rare earth complex After being applied to spinach, they not only improved the quality of spinach, but also degraded the chlorpyrifos residues in spinach The residues of polysaccharide rare earth complex were about 1 / 3 of the control; they were water-soluble Chlorpyrifos also has a good degradation effect The degradation rate of chlorpyrifos is about 95% higher than that of the control when they react with chlorpyrifos for 48 hours under normal and neutral conditions According to the previous research results, it has been shown that the multifunctional foliar fertilizer can be prepared by using water-soluble carbohydrate as ligand and a small amount of rare earth and other trace elements The key difficulty in the industrialized production process of this technology is how to rapidly degrade the water-soluble polysaccharide from kelp waste liquid into oligosaccharide, and under certain conditions synthesize stable and homogeneous products with trace elements such as rare earth, which have strong degradation effect on organophosphorus pesticides and promote the growth of the products The above production technology has been solved in the pilot plant The product has the advantages of simple production process, easy access to raw materials, less investment, no pollution, low use cost, and meets the needs and requirements of current and future green food production The basic research on the production technology and application of the product has published 8 papers in domestic academic journals, including 4 papers included in SCI, 2 patents applied, and 1 authorized.