ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

畜禽糞污處理中氨氣膜接觸器回收的傳質及選擇性研究
CSTR:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

基金項目:

國家自然科學基金項目(32002222、52076101)和中央高?;究蒲袠I(yè)務經費專項資金項目(2662022GXYJ006)


Mass Transfer and Selectivity of Ammonia Recovery Using Membrane Contactor during Manure Treatment
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 圖/表
  • |
  • 訪問統(tǒng)計
  • |
  • 參考文獻
  • |
  • 相似文獻
  • |
  • 引證文獻
  • |
  • 資源附件
  • |
  • 文章評論
    摘要:

    對畜禽糞污好氧堆肥中產生的氨氣與厭氧發(fā)酵后沼液中的氨氮進行回收,,不僅可以減少污染物和溫室氣體的排放,達到減污降碳的目的,,還能獲得氮肥產品,,增加糞污處理的經濟性。針對現有氨氣捕集過程中設備體積大和靈活性差等問題,,提出了采用中空纖維膜來實現氨氣捕集的目標,。采用空氣吹掃氨水溶液模擬了不同情形下的氨氣濃度與空氣流量,測試不同情形下氨氣捕集的通量和回收率,,分析影響氨氣捕集的主要因素和傳質特性,。結果表明,氨氣向膜內傳質的阻力主要受氣相傳質阻力和膜的傳質阻力影響,,低空氣流量下氣相傳質阻力占主導地位,。提升空氣流量至5L/min時,氣相傳質阻力比0.5L/min時下降53.6%,,此時膜內傳質阻力占主導,。氨氣捕集通量隨進膜氨氣濃度的增大而提升,。在空氣流量低于1L/min下,氨氮回收率高于95%,,0.5L/min時的氨氮回收率高于99%,。在氨氣停留時間足夠的條件下,氨氮回收率僅與酸液吸收容量相關,。在溫度差和濃度差的影響下,,空氣中的水蒸氣會向膜內的吸收劑中傳遞。吸收劑中含質量分數26%的硫酸銨比僅含1%的硫銨溶液水回收通量高13.3倍,,氨氮分離因子由41.6降低至3.06,。酸液質量分數對氨氣的傳質無顯著影響。文獻對比表明典型狀態(tài)下糞污處理中的氨氣釋放質量濃度與本研究中涉及的質量濃度區(qū)間基本一致,,說明中空纖維膜捕集氨氣具有較廣的適用性,。

    Abstract:

    Ammonia recovery from aerobic composting of livestock and poultry manure, or recovery from biogas slurry, can not only reduce pollutant and greenhouse gas emissions, but also obtain nitrogen fertilizer products. Aiming to use hollow fiber membrane absorption process for ammonia gas capture to solve the problems of large equipment volume and poor flexibility in the existing ammonia capture process, air stripping of diluted aqueous ammonia solution was used to prepare ammonia contained air. Then, the simulated ammonia contained air was flowed into hollow fiber membrane contactor, in which ammonia was captured by acid solution flowing in the tube side of the hollow fiber. By analyzing the total ammonium nitrogen concentration in the aqueous ammonia solution and acid solution, the ammonia mass transfer characteristics can be acquired. The results indicated that the mass transfer resistance of ammonia capture was mainly influenced by the gas phase mass transfer resistance and the membrane mass transfer resistance. The gas phase mass transfer resistance dominated at low air flow rates. However, when the air flow rate was increased to 5L/min, the gas phase mass transfer resistance was decreased by 53.6% compared with that of 0.5L/min, and the membrane mass transfer resistance dominants. The ammonia capture flux was increased with the elevation of ammonia concentration. Ammonia recovery ratio was above 95% at an air flow rate below 1L/min, while it was increased to above 99% at air flow rate of 0.5L/min. The ammonia recovery ratio was only related to the acid absorption capacity if sufficient ammonia retention time was provided. Under the dual influence of temperature and concentration differences, water vapor in the air would transfer into the membrane thus decreasing the product concentration. When the mass fraction of absorbent was 26%, the water transfer flux was 13.3 times higher than that of using 1% sulfuric acid solution. Besides, ammonia separation factor was decreased from 41.6 to 3.06. Acid concentration variation had no significant impact on the mass transfer of ammonia. Literature review showed that the ammonia release concentration in typical manure treatment was basically consistent with the concentration range. The hollow fiber membrane proposed had a wide applicability for capturing ammonia.

    參考文獻
    相似文獻
    引證文獻
引用本文

賀清堯,廖婷,陳號遷,劉夢飛,紀龍,晏水平.畜禽糞污處理中氨氣膜接觸器回收的傳質及選擇性研究[J].農業(yè)機械學報,2024,55(2):338-345. HE Qingyao, LIAO Ting, CHEN Haoqian, LIU Mengfei, JI Long, YAN Shuiping. Mass Transfer and Selectivity of Ammonia Recovery Using Membrane Contactor during Manure Treatment[J]. Transactions of the Chinese Society for Agricultural Machinery,2024,55(2):338-345.

復制
分享
文章指標
  • 點擊次數:
  • 下載次數:
  • HTML閱讀次數:
  • 引用次數:
歷史
  • 收稿日期:2023-06-29
  • 最后修改日期:
  • 錄用日期:
  • 在線發(fā)布日期: 2024-02-10
  • 出版日期:
文章二維碼