Composition Analysis And Building Of Calorific Value Monel In Pig Manure

China is a large agricultural country, the livestock and poultry industry occupies an important position in China’s national economy. With the rapid development of livestock and poultry breeding industry, livestock manure production is also increasing rapidly, large concentrations of livestock and poultry excrement brought a lot of pressure to environmental protection work. The traditional treatment of livestock manure is used as feed or fertilizer, there are more and more researches about the energy utilization of livestock and poultry manure in recent years. The premise of scientific and rational use of these biomass energy, is must to know its main composition and the relationship between calorific value and composition. This experiment analysis the industrial composition, NCHSO elemental composition, low and high heat value of pig manure, established a prediction model for the calorific value by NCHSO elemental content of pig manure, and explore the feasibility of rap id prediction based on near-infrared spectroscopypig manure composition and then established the appropriate forecasting model.The main contents and conclusions by testing are as follows:(1) In order to analysis the pig manure industrial component (moisture, ash, volatile matter, fixed carbon), the element content of the component (N, C, H, S, O), the calorific value (high calorific value, low calorific value),136pig manure samples of the different regions of Hubei Province were selected. The test measured that the average of the pig manure ash content as high as22.12%, much higher than wheat straw (8.90%) and pine (0.40%).The average of the volatile content is62.92%, close to the wheat straw (67.36%) and pine (76.60%); Fixed carbon content average is8.63%, fower than wheat straw (19.35%) and pine (17.00%).The content of nitrogen is range from0.808%to4.238%, carbon is range from25.072%to47.158%, hydrogen is range from3.650%to10.388%, sulfur is range from0.280%to0.986%and the oxygen is range from16.182%to40.015%. High calorific value of the average value is15849.21J/g, slightly lower than wheat straw and ordinary coal, but some has higher calorific value can reach2/3of the common coal.(2) In order to explore the feasibility of using pig manure element content (N, C, H, S, O) predicting the heat value. The test measured105pig manure samples element content and high calorific value content, using stepwise multiple regression analysis to create predictive models. The test results showed that five elements (N, C, H, O, S) can be a good prediction of pig manure calorific value, the regression equation correlation coefficient is0.969at a significance level of0.05, the regression coefficients corresponding p less than0.05, have a significant.(3) In order to explore the use of near-infrared reflectance spectroscopy (NIRS) rapid determination of the feasibility of the main ingredients of pig manure. The test using Fourier transform near-infrared spectrometers, spectral scans of136samples were collected, the spectral wave number range of8000cm-1～4000cm-1.NIRS calibration model established by partial least raw pig manure ingredients. The test results show that the near-infrared spectroscopy can be able to predict C content in pig manure; For N and H, the prediction effect is better, to verify the effect is not ideal; For S and O, cannot use near infrared for rapid prediction.