摘要
为了探讨不同加气方式对微咸水和中水溶解氧随时间的变化规律以及溶解氧随温度的变化规律,找出最佳的加气方式,采用对比试验,研究了8个不同处理即微纳米发泡器(F1)、12气石头增氧泵(F2)、28气石头增氧泵(F3)、文丘里器(F4)、文丘里器与12气石头增氧泵组合(F5)、文丘里器与28气石头增氧泵组合(F6)、微纳米发泡器与12气石头增氧泵组合(F7)、微纳米发泡器与28气石头增氧泵组合(F8)加气,以及7个不同水温(F9)(15,20,25,30,35,40,45℃)对微咸水(W1)和中水(W2)的溶解氧影响.结果表明:①与对照CKW1相比,处理F3W1,F1W1,F2W1,F4W1的溶解氧分别增加了59.65%,53.10%,44.43%,39.47%;与对照CKW2相比,处理F3W2,F1W2,F2W2,F4W2的溶解氧分别增加了80.17%,78.04%,60.13%,55.22%.②与对照CKW1相比,处理F8W1和F7W1的溶解氧分别增加了73.98%,67.79%;与对照CKW2相比,处理F8W2和F7W2的溶解氧分别增加了100.21%,94.67%.③与对照CKW1相比,处理F6W1和F5W1的溶解氧分别增加了63.84%,57.44%;与对照CKW2相比,处理F6W2和F5W2的溶解氧分别增加了79.45%,73.79%.④与对照CKW1相比,处理F9W1的溶解氧在不同水温下分别降低了0,9.82%,12.86%,14.86%,26.56%,29.43%,34.24%;与对照CKW2相比,处理F9W2在不同水温下分别降低0,15.32%,15.69%,19.24%,23.65%,25.59%,32.55%.以最大溶解氧为参考时,最佳加气方式为微纳米发泡器+28气石头增氧泵(F8W19.83mg/L,F8W29.39mg/L).
The relationships of dissolved oxygen in brackish water and reclaimed water with time and temperature were clarifed experimentally to find out the best aerating method.In experiment design,eight treatments were assigned,namely micro-nano bubble generating device (F1),12 gas stone fired oxygen pump (F2),28 gas stone fired oxygen pump (F3),Venturi (F4),Venturi+12 gas stone fired oxygen pump (F5),Venturi+28 gas stone fired oxygen pump (F6),micro-nano bubble generating device+12 gas stone fired oxygen pump (F7),micro-nano bubble generating device+28 gas stone fired oxygen pump (F8) at 20 ℃ water temperature,and seven temperatures (F9) such as 15 ℃,20 ℃,25 ℃,30 ℃,35 ℃,40 ℃ and 45 ℃ as well as brackish water (W1) and reclaimed water (W2) were applied in oxygen dissolving.The results show that the dissolved oxygen increases by 59.65%,53.10%,44.43% and 39.47% in treatments F3W1,F1W1,F2W1 and F4W1,respectively,compared with CKW1.Compared with CKW2,fortunately,the dissolved oxygen rises by 80.17%,78.04%,60.13% and 55.22% in F3W2,F1W2,F2W2 and F4W2,respectively.Based on CKW1,the dissolved oxygen increases by 73.98% and 67.79% in F8W1 and R7W1,respectively.Interestingly,in terms of CKW2,the dissolved oxygen is ascended by 100.21% and 94.67% in F8W2 and F7W2,respectively.Unfortunately,compared with CKW1,the dissolved oxygen is increased by 63.84% and 57.44% in F6W1 and F5W1,respectively.Simiarly,compared with CKW2,the oxygen is increased by 0,79.45% and 73.79% in F6W2 and F5W2,respectively.Finally,compared with CKW1,when the water tempe-rature rises from 15 ℃ to 45 ℃,the dissolved oxygen in F9W1 is decreased by 0,9.82%,12.86%,14.86%,26.56%,29.43% and 34.24%,respectively.In parallel,compared with CKW 2,temperature rise in F9W2 leads to an increase in the dissolved oxygen by 0,15.32%,15.69%,19.24%,23.65%,25.59% and 32.55%,respectively.In terms of the maximum dissolved oxygen,the best aerating method is the case:micro-nano bubble generating device+28 gas stone fired oxygen pump (F8W1 9.83 mg/L,F8W2 9.39 mg/L).
作者
欧阳赞
田军仓
邓慧玲
闫新房
OUYANG Zan;TIAN Juncang;DENG Huiling;YAN Xinfang(School of Civil Engineering and Hydraulic Engineering,Ningxia University,Yinchuan,Ningxia 750021,China;Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation,Yinchuan,Ningxia 750021,China;Engineering Research Center for Efficient Utilization of Water Resources in Modern Agricultural in Arid Regions,Ministry of Education,Yinchuan,Ningxia 750021,China)
出处
《排灌机械工程学报》
EI
CSCD
北大核心
2019年第9期806-814,共9页
Journal of Drainage and Irrigation Machinery Engineering
基金
国家自然科学基金资助项目(51469027)
教育部长江学者和创新团队发展计划项目(IRT1067)
关键词
加气灌溉
溶解氧
微咸水
中水
aerated irrigation
dissolved oxygen
brackish water
reclaimed water
