The Study On The Capacity Of Four Kinds Of Adsorbent On The Outside Of Dairy Cows Cowshed Ventilator To CO₂?CH₄?NH₃ And H₂S In Different Seasons

Air pollution problems have become more serious, the EU statistics:NH₃ emission from livestock accounted for 64%-76%of total emission; CH₄ emission accounted for 51% of total emission; Livestock CO₂ emission over industrial emission. At the end of 2015, China was invited to attend the "Climate Conference in Paris " and abide by the agreement, Domestic CO₂ emissions in 2030 relative to 2005 dropped by two-thirds. Currently emission reduction method for animal mainly endogenous emission, but they have some drawbacks, So it's time to curbs ongreenhousegas emissions. Test is selected from four exogenous adsorbent adsorption milk barn, Four kinds of exogenous adsorbent to lactation cowshed CO₂, CH₄, NH₃ and H₂S adsorption study. Three of atuminosilicate adsorbent ?is adsorbent XF-1, XF-2, XF-3?, one kind of fertilizer adsorbent ?is adsorption agent XF-4?, by the method of exogenous CO₂, CH₄, NH₃ and H₂S emissions adsorption test in spring, summer, autumn and winter.Experiment I This experiment tested the adsorption capacity to CO₂, NH₃ and H₂S of three different aperture molecular adsorbent in the cowshed. Take suspension adsorbent as the experimentalgroup, and the controlgroup without adsorbent. The different values between the twogroups are the adsorption concentration of XF-1. Using the idealgas state equation to deduce formula according the actual measured temperature, atmospheric pressure and wind speed, Put ppm converted to mg/m³, Stop the test when there is no obvious different between the experimentalgroup and controlgroup. The experimental data show that 1 kg of adsorbent XF-1 can adsorb CO₂61.28g, CH,8.39g, NH₃1.26g and H₂S 1.71g in Spring, adsorb CO₂59.14g, CR,8.02g, NH₃1.34g and H₂S 1.75g in Summer, adsorb CO₂65.76g, CH₄8.71g, NH₃1.64g and H₂S 1.54g in Autumn, adsorb CO₂ 70.91g, CH₄ 9.32g, NH₃2.29g and H₂S 1.57g in Winter.1 kg of adsorbent XF-2 can adsorb CO₂64.91g, CH₄ 8.82g, NH₃ 1.43g and H₂S 1.79g in Spring, adsorb CO₂ 62.48g, CH₄ 8.31g, NH₃ 1.54g and H₂S 1.84g in Summer, adsorb CO₂ 69.14g, CH₄ 9.45g, NH₃1.81g and H₂S 1.61g in Autumn, adsorb CO₂ 75.49g, CH₄ 10.12g, NH₃ 2.65g and H₂S 1.65g in Winter.1 kg of adsorbent XF-3 can adsorb CO₂73.21g, CH₄ 10.06g, NH₃ 1.52g and H₂S 2.05g in Spring, adsorb CO₂ 70.47g, CH₄ 9.23g, NH₃ 1.67g and H₂S 2.13g in Summer, adsorb CO₂ 78.45g, CH₄ 10.96g, NH₃ 2.05g and H₂S 1.86g in Autumn, adsorb CO₂ 85.95g, CH₄ 12.36g, NH₃ 2.87g and H₂S 1.88g in Winter. The adsorption of three adsorbent adsorption to CO₂ CH₄ and NH₃ has positive correlation with the Temperature, Relative humidity and initial concentration, for H₂S has has positive correlation with the Relative humidity, initial concentration.The Adsorbent XF-1 should be replaced after suspension for 31 h in Spring and Winter, should be replaced after suspension for 30 h in Summer and Autumn.The Adsorbent XF-2 and Adsorbent XF-3 should be replaced after suspension for 30 h in Spring and Winter,should be replaced after suspension for 29 h in Summer and Autumn.Experiment ? This experiment tested the adsorption capacity to CO₂, CH₄, NH₃ and H₂S of adsorbent XF-4 in the cowshed to different season. We use the portablegas detector to test the concentrations of CO₂, CH₄, NH₃ and H₂S at the ventilator, Take suspension adsorbent as the experimentalgroup, and the controlgroup without adsorbent, The different values between the twogroups are the adsorption concentration of XF-4. Using the idealgas state equation to deduce formula according the actual measured temperature, atmospheric pressure and wind, speed Put ppm converted to mg/m³, Stop the test when there is no obvious different between the experimentalgroup and controlgroup. The experimental data show that 1 kg of adsorbent XF-4 can adsorb CO₂ 2.30g, CH₄ 0g, NH₃ 15.69g and H₂S 0g in Spring, adsorb CO₂ 1.70g, CH₄ 0g, NH₃ 10.24g and H₂S 0g in Summer, adsorb CC2 3.29g, CH₄ 0g, NH₃ 18.36g and H₂S 0g in Autumn, adsorb NH₃ 20.65g, CH₄ 0g, CO₂ 4.38g and H₂S 0g in Winter. The adsorption of XF-4 adsorbent adsorption to NH₃ and CO₂ has positive correlation with the Temperature, Relative humidity, pH in cowshed, for NH₃ and CO₂ has negative correlation with the relative Gas concentration. The best adsorbent time of adsorbent XF-4 adsorption for 4-7 h, The Adsorbent XF-4 should be replaced after suspension for 35 h.In conclusion, The molecular adsorbent is able to adsorbent on four kinds ofgas and the external environment less affected. The adsorbent XF-4 of NH₃ adsorption ability strong, The CO₂ adsorption capacity is weak; The CH₄ and H₂S without adsorption capacity.