Using The Poplar Fermentation Fesidue To Product The Slow-Release Fertilizer

The bio-ethanol, as a new important energy and no-environmental pollution, ha s been attacked attention when the global climate and environment suffered damage. Using the wood to produce bio-ethanol is a great innovation in our country, which leaves a large number of useless residue. This paper, using the bio-ethanol residue as the research object to prepare slow release fertilizer, which based on the main components of residue. Not only provides a way to use the residue, but also reduc e the costs of the bio-ethanol production by development of high valued products. The conclusions are as follows:1. The wood sample, the steam explosion pretreatment of sample and the bio ethanol residue are extracted by cold water, hot water, respectively by 1%NaOH an d benzene alcohol. The content of the extractives were:the bio ethanol residue> th e steam explosion pretreatment of sample> the wood samples. These data suggest t hat steam explosion pretreatment technology hanged the structure and chemical com position of the wood greatly. On the premise of keeping the content of the cellulos e and the hemicellulose, disguised increasing the content of cellulose in the sample. The steam explosion pretreatment is an excellent pretreatment method to bio-ethan ol technology, which makes the wood structure be more loosed to react. The main component of bio ethanol residue is lignin, the other main components are cellulose a nd hemicellulose.2.The main principle of using ammonia as nitrogen source, hydrogen peroxide a s catalyst, with high temperature and high pressure produce slow release fertilizer is that the aromatic nucleus on the lignin is easy to react with nitrogen. Though opti mization, with 65% ammonia,35%hydrogen peroxide, and 120℃, the total nitrogen content reaches 9.14%, and the content of organic nitrogen reaches 5.46%. Mathe matical analysis is carried out by using the orthogonal experimental method is 45% ammonia,25%hydrogen peroxide, and 120℃, the total nitrogen content reaches 7.55 %, and the content of organic nitrogen reaches 4.87%. After regulation pH to 4, Ni trogen content can reach 12.04%. Comparing with some results of the past has cert ain superiority.3. Comparing to the ammoxidation method, preparing the slow-release fertilizer by coating is more controllable. This paper try to use the polyvinyl alcohol as the adhesive wrapped fertilizer core which is main of montmorillonite and urea by fer mentation residue. Through adjust of the ratio of the montmorillonite and urea, an d the ratio of the concentration of the polyvinyl alcohol to achieve the purpose of precise control. There is a great relationship between release rate and fertilizer core residues montmorillonite slow release fertilizer ratio. The residue-montmorillonite sl ow-release fertilizer dissolved to release the urea by steps in the water. The first is "diffusion", and the second is "collapse". According to curve fitting the different of fert-ilizer fertilizers, the curve of the slow-release fertilizer which is urea/montmoril lonite=6:4 is close to the cubic curve, and the curve of the slow-release fertilizer w itch is all urea is close to the S curve. We produce different fertilizers to release u rea accurately by controlling the ratio of the urea and montmorillonite.