工业水处理 ›› 2024, Vol. 44 ›› Issue (5): 156-163. doi: 10.19965/j.cnki.iwt.2023-0364

• 试验研究 • 上一篇    下一篇

膜耦合技术对沼液浓缩及净水效果的影响

李冰1(), 吴迪1, 石岩1, 李海翔2(), 李甫2, 马毅1   

  1. 1. 天津市农业科学院农业资源与环境研究所, 天津 300022
    2. 山东省地质矿产勘查开发局八〇一水文地质工程地质大队, 山东 济南 250014
  • 收稿日期:2024-03-13 出版日期:2024-05-20 发布日期:2024-05-21
  • 作者简介:

    李冰(1988— ),硕士,助理研究员。电话:18222459610,E-mail:

    李海翔,高级工程师。电话:15866631837,E-mail:

Effect of membrane coupling technology on concentration and water purification of biogas slurry

Bing LI1(), Di WU1, Yan SHI1, Haixiang LI2(), Fu LI2, Yi MA1   

  1. 1. The Institute of Agriculture Resources and Environmental Sciences, Tianjin Academy of Agricultural Sciences, Tianjin 300022, China
    2. 801 Instituite of Hydrogeology and Engineering Geology, Shandong Provincial Bureau of Geology & Mineral Resource, Ji’nan 250014, China
  • Received:2024-03-13 Online:2024-05-20 Published:2024-05-21

摘要:

利用超滤-纳滤膜耦合技术,探究了pH为5~9条件下膜耦合技术对沼液的浓缩效果、净化能力等。结果表明:体积浓缩倍数(VRF)分别为5倍和10倍时,在pH为5~7的条件下,沼液浓缩效果和净水效果均优于碱性条件。当pH为7,VRF为10倍时,浓缩液中总氮(TN)、总磷(TP)、总钾(TK)分别为1 760、435、2 100 mg/L,浓度浓缩倍数分别达到8.8、7.63、6.34倍,盐分去除效果最好,浓缩效果最佳。透过液中NH4 +-N、TN、TP、COD的去除率分别达到89.71%、81%、99.82%、95.77%,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)二级标准。通过扫描电镜(SEM)和X射线能量仪(EDX)分析可知,膜污染包括有机-无机协同污染,通过酸洗、碱洗能够对膜面污染物的去除起到一定的效果。

关键词: 养殖沼液, 膜耦合技术, 浓缩效果, 水质净化, 重金属去除, 膜污染

Abstract:

Ultrafiltration and nanofiltration membrane coupling technology was used to investigate the effects of membrane coupling technology on the concentration effect of biogas slurry and wastewater purification capacity under pH 5-9. The results showed that under the condition of VRF as 5 and 10 times, the concentration and nutrient removal effects under pH of 5-7 were better than those under alkaline condition. With pH of 7 and VRF of 10 times,the concentrations of TN,TP and TK in concentrated liquid were 1 760 mg/L, 435 mg/L and 2 100 mg/L, respectively,and the concentration times were 8.8, 7.63 and 6.34 times, which showed the best salt removal effect and concentration effect. The removal rates of NH4 +-N, TN, TP and COD in the filtrate reached 89.71%, 81%, 99.82% and 95.77%, respectively. The effluent quality reached the secondary standards of Pollutant Discharge Standards for Urban Sewage Treatment Plants(GB18918—2002). According to the analysis of scanning electron microscope(SEM) and X-ray energy analyzer(EDX), the membrane pollution included organic-inorganic co-pollution. The removal of pollutants on the membrane surface could be partially achieved by acid and alkali washing.

Key words: membrane coupling technique, concentration multiple, water purification, heavy metal removal, membrane pollution

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