| 引用本文: | 公维佳,王嘉硕,刘宪武,唐小斌,梁恒.GAC/GDM组合工艺用于村镇饮用水净化机制及调控[J].哈尔滨工业大学学报,2022,54(8):34.DOI:10.11918/202110099 |
| GONG Weijia,WANG Jiashuo,LIU Xianwu,TANG Xiaobin,LIANG Heng.Mechanisms and regulations of GAC/GDM hybrid process for rural drinking water treatment[J].Journal of Harbin Institute of Technology,2022,54(8):34.DOI:10.11918/202110099 |
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| GAC/GDM组合工艺用于村镇饮用水净化机制及调控 |
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公维佳1,王嘉硕1,刘宪武1,唐小斌2,梁恒2
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(1.东北农业大学 工程学院,哈尔滨 150038;2.城市水资源与水环境国家重点实验室(哈尔滨工业大学),哈尔滨 150090)
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| 摘要: |
| 能耗高、操作复杂、运维量大、成本高是制约当前村镇饮用水处理技术发展和推广应用的瓶颈问题。为此,针对性地研发超低压重力驱动型膜滤净水技术（GDM）,具有操作简单、近零维护、低能耗和无药剂等工艺优势；同时,为进一步提高污染物的去除效能,构建颗粒物活性炭（GAC）缓速滤池与GDM组合工艺（GAC/GDM）。结果表明,GAC缓速滤池预处理可显著提升对UV254、溶解性有机碳（DOC）和氨氮的去除效能,去除率分别高达75%、86%和90%,同时有助于提升膜出水通量（较GDM对照组提升了32%）。此外,考察了微循环（CGAC/GDM）和微曝气（AGAC/GDM）两种方式对组合工艺运行效能的调控作用,长期运行过程中,CGAC/GDM与AGAC/GDM的稳定通量较GDM对照组分别提高约36%和49%；然而,其对DOC和UV254的去除率较GAC/GDM工艺略有降低,这是由于微循环和微曝气措施增加了膜前溶解氧质量浓度,强化了膜表面生物滤饼层内微生物的水解作用。提出的GAC/GDM组合工艺可同步实现对膜通量和污染物去除效能的提升作用,为村镇地区膜滤供水技术的发展和推广应用提供了理论和技术支撑。 |
| 关键词: 重力驱动膜滤（GDM） GAC缓速滤池 膜污染 低能耗 近零维护 农村供水 |
| DOI：10.11918/202110099 |
| 分类号:TU991.2 |
| 文献标识码:A |
| 基金项目:东北农业大学“学术骨干”项目(20XG06) |
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| Mechanisms and regulations of GAC/GDM hybrid process for rural drinking water treatment |
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GONG Weijia1,WANG Jiashuo1,LIU Xianwu1,TANG Xiaobin2,LIANG Heng2
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(1.College of Engineering, Northeast Agricultural University, Harbin 150038, China; 2.State Key Laboratory of Urban Water Resources and Water Environment (Harbin Institute of Technology), Harbin 150090, China)
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| Abstract: |
| High energy consumption, complex operation, large amount of operation and maintenance, and high cost restrict the development and extensive application of drinking water treatment technology in rural areas. In this study, the ultra-low pressure gravity-driven membrane (GDM) filtration technology was specifically developed, which has the advantages of simple operation, low maintenance, low energy consumption, and chemical free. To further improve the removal efficiency of pollutants, we constructed a hybrid process of granular activated carbon (GAC) slow filter and GDM (GAC/GDM). Results show that pretreatment by GAC slow filter could significantly improve the removal efficiency of UV254, dissolved organic carbon (DOC), and ammonia nitrogen, with the average removal efficiency of 75%, 86%, and 90%, respectively. Meanwhile, the membrane flux was improved by 32% compared with GDM control. The regulation effect of either water cycle (CGAC/GDM) or weak aeration (AGAC/GDM) on the performance of the hybrid process was investigated. During long-term filtration, compared with GDM control, the stable flux of CGAC/GDM and AGAC/GDM was increased by 36% and 49%, respectively. However, the removal efficiency of DOC and UV254 in CGAC/GDM and AGAC/GDM declined slightly compared with GAC/GDM, since water cycle and weak aeration increased the concentration of dissolved oxygen in the feed water before GDM filtration, which promoted the hydrolysis of organic pollutants retained within the bio-cake layer on the membrane surface by the microorganisms. Therefore, the proposed GAC/GDM hybrid process can simultaneously improve the stable flux level and pollutant removal, which will provide theoretical and technical support for the development and application of membrane filtration technology in the rural areas. |
| Key words: gravity-driven membrane (GDM) GAC slow filter membrane fouling low energy consumption low maintenance rural drinking water supply |
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