Impacts of different aerating methods on dissolved oxygen in brackish water and reclaimed water
OUYANG Zan1, TIAN Juncang1,2,3*, DENG Huiling1, YAN Xinfang1,2,3
1. School of Civil Engineering and Hydraulic Engineering, Ningxia University, Yinchuan, Ningxia 750021, China; 2. Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan, Ningxia 750021, China; 3. Engineering Research Center for Efficient Utilization of Water Resources in Modern Agricultural in Arid Regions, Ministry of Education, Yinchuan, Ningxia 750021, China
Abstract: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 F7W1, 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 temperature 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 CKW2, 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).
欧阳赞, 田军仓,,*, 邓慧玲, 闫新房,,. 不同加气方式对微咸水和中水溶解氧的影响[J]. 排灌机械工程学报, 2019, 37(9): 806-814.
OUYANG Zan, TIAN Juncang,,*, DENG Huiling, YAN Xinfang,,. Impacts of different aerating methods on dissolved oxygen in brackish water and reclaimed water. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(9): 806-814.
[1]GOORAHOO D, CARSTENSEN G, ZOLDOSKE D F, et al. Using air in sub-surface drip irrigation(SDI)to increase yields in bell peppers[J]. International water and irrigation review, 2002,22(2):39-42.[2]BHATTARAI S P, SU Ninghu, MIDMORE D J. Oxygation unlocks yield potentials of crops in oxygen-limited soil environments[J]. Advances in agronomy, 2005,88:313-377.[3]BORTOLINI L. Injecting air into the soil with buried fertirrigation equipment[J]. Informatore agrario, 2005,61(19):33-36.[4]BHATTARAI S P, PENDERGAST L, MIDMORE D J. Root aeration improves yield and water use efficiency of tomato in heavy clay and saline soils[J]. Scientia horticulturae, 2006,108(3):278-288.[5]EHRET D L, EDWARDS D, HELMER T, et al. Effects of oxygen-enriched nutrient solution on greenhouse cucumber and pepper production[J]. Scientia horticultu-rae, 2010,125(4):602-607.[6]温改娟,蔡焕杰,陈新明,等. 加气灌溉对温室番茄生长和果实品质的影响[J]. 西北农林科技大学学报(自然科学版),2013,41(4):113-118,124. WEN Gaijuan, CAI Huanjie, CHEN Xinming, et al. Influence of aeration irrigation on growth and fruit quality of greenhouse tomato[J]. Journal of Northwest A&F University(natural science edition), 2013,41(4):113-118,124.(in Chinese)[7]肖卫华,姚帮松,张文萍,等.加氧灌溉对烟草生长影响规律的研究[J].中国农村水利水电,2014(2):30-32. XIAO Weihua, YAO Bangsong, ZHANG Wenping, et al. Research on the influence of tobacco growth by oxygation[J]. China rural water and hydropower, 2014(2):30-32.(in Chinese)[8]张立成.不同加氧处理对超级稻生长、生理及产量的影响研究[D].长沙:湖南农业大学,2015.[9]朱艳,蔡焕杰,陈慧,等. 加气灌溉对土壤中主要微生物数量的影响[J]. 节水灌溉,2016(8):65-69,75. ZHU Yan, CAI Huanjie, CHEN Hui, et al. Impacts of aerated irrigation on number of soil major microorganism[J]. Water saving irrigation, 2016(8):65-69,75.(in Chinese)[10]陈慧,侯会静,蔡焕杰,等. 加气灌溉温室番茄地土壤N2O排放特征[J]. 农业工程学报, 2016,32(3):111-117. CHEN Hui, HOU Huijing, CAI Huanjie, et al. Soil N2O emission characteristics of greenhouse tomato fields under aerated irrigation[J]. Transactions of the CSAE, 2016,32(3):111-117.(in Chinese)[11]周云鹏,徐飞鹏,刘秀娟,等. 微纳米气泡加氧灌溉对水培蔬菜生长与品质的影响[J]. 灌溉排水学报, 2016,35(8): 98-100,104. ZHOU Yunpeng, XU Feipeng, LIU Xiujuan, et al. Influence ofmicro bubble oxygen irrigation on vegetable growth and quality effect[J]. Journal of irrigation and drainage, 2016,35(8): 98-100,104.(in Chinese)[12]雷宏军,臧明,张振华,等. 循环曝气地下滴灌的温室番茄生长与品质[J]. 排灌机械工程学报, 2015,33(3):253-259. LEI Hongjun, ZANG Ming, ZHANG Zhenhua, et al. Growth and quality of greenhouse tomato under cycle aerated subsurface drip irrigation[J]. Journal of drainage and irrigation machinery engineering, 2015,33(3):253-259.(in Chinese)[13]雷宏军,冯凯,张振华,等.河南3种典型土壤曝气滴灌草莓生长与品质[J]. 排灌机械工程学报, 2017,35(2):158-164. LEI Hongjun, FENG Kai, ZHANG Zhenhua, et al. Growth and quality of potted strawberry under aerated drip irrigation in the three typical soils in Henan Province[J]. Journal of drainage and irrigation machi-nery engineering, 2017,35(2):158-164.(in Chinese)[14]刘鑫,刘智远,雷宏军,等.不同增氧灌溉方式春小麦生长及产量比较[J]. 排灌机械工程学报, 2017,35(9):813-819. LIU Xin, LIU Zhiyuan, LEI Hongjun, et al. Compari-sons of growth and yield of spring wheat treated with different oxygation techniques[J]. Journal of drainage and irrigation machinery engineering, 2017,35(9):813-819.(in Chinese)[15]虞哲,张燕,姜茗馨,等. 含盐度对溶解氧的影响[J]. 科学咨询(科技·管理), 2014(9):39-40. YU Zhe, ZHANG Yan, JIANG Mingxin, et al. Effect of salinity on dissolved oxygen[J]. Technology & management, 2014(9):39-40.(in Chinese)