Study on material reuse from wastewater emitted from agricultural and food industries by use of high function membranes

高功能膜对农业和食品工业废水的材料回用研究

• 批准号: 12660226
• 负责人: KOIDE Shoji
• 金额: $ 2.69万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12660226/
• 关键词: Electrodialysis; ion-exchange membranes; wastewater; processing plant; greenhouse; L-ascorbic acid; mass balanace; nitrate acid; 膜; 培養液; 水環境; イオン; 効率; イオンバランス; 硝酸イオン; リン酸イオン; カリウムイオン; 未利用資源; BOD; COD; モデル

In this study, the feasibility to concentrate L-ascorbic acid (Vitamin C, AsA) from wastewater coming from the immersion process at a potato processing plant by electrodialysis was evaluated. It was found that dissolved AsA could be concentrated electrically, by use of electrodialysis. The characteristics of the raw wastewater, the filtrated solution, and the electrodialyzed solutions were also assessed quantitatively. In the diluted solution after electrodialysis, biochemical oxygen demand (BOD), chemical oxygen demand (COD), total solids (TS) and volatile solids (VS) were reduced by 71.0%, 73.7%, 81.0% and 75.2%, respectively, compared to the raw wastewater. In this study, variation of dissolved AsA concentration in the concentrated solution during electrodialysis under several current densities was analyzed using a mathematical model. The calculated values by the model fit the measured values well.Next, electrodialysis separation of electrolytes (NO_3^-, PO_4^<3->, SO_4^<2->, NH_4^+ … More , Na^+, K^+, Ca^<2+> and Mg^<2+>) in a drainage nutrient solution from a greenhouse was carried out using two types of ion-exchange membranes. The influences of the ion-exchange membranes as well as the pH of the drainage nutrient solution on the separation performances of the electrolytes were also investigated. The experimental results indicated that ion-exchange membranes for deacidification (AC-220) separated both monovalent and divalent ions from the drainage nutrient solution, while, ion-exchange membranes for desalination (AC-110) indicated monovalent ion selectivity. Regarding the relative energies and current efficiencies, the ion-exchange membranes for deacidification AC-220 indicated better results than for those of the AC-110 membranes for desalination. The separation performances were not significantly influenced by the pH of the drainage nutrient solution for either of the ion-exchange membranes.Although, the data presented here may not be sufficient to recycle the wastewater, the understanding of separation performances discussed will act as a feasibility study. Less

研究了电渗析法浓缩马铃薯加工厂浸泡废水中L抗坏血酸(维生素C)的可行性。采用电渗析的方法，可以对溶解的AsA进行电浓缩。并对原废水、滤液和电渗析液的性质进行了定量评价。在电渗析后的稀释液中，生化需氧量(BOD)、化学需氧量(COD)、总固体(TS)和挥发性固体(VS)分别比原废水降低71.0%、73.7%、81.0%和75.2%。本文利用数学模型分析了不同电流密度下电渗析过程中浓缩液中溶解AsA浓度的变化规律。其次，电渗析分离电解液(NO_3^-，PO_4^&lt；3-&gt；，SO_4^&lt；2-&gt；，NH_4^+…此外，用两种离子交换膜对温室排水营养液中的Na~(2+)、K~(++)、Ca~(2+)、Ca~(2+)和Mg~(2+)进行了测定。考察了离子交换膜和排水营养液的pH值对电解液分离性能的影响。实验结果表明，用于脱酸的离子交换膜(AC-220)对排水营养液中的一价离子和二价离子均有分离作用，而用于脱盐的离子交换膜(AC-110)则表现出一价离子的选择性。在相对能量和电流效率方面，离子交换膜AC-220的脱酸效果优于AC-110膜的脱盐效果。两种离子交换膜的排水营养液的pH值对分离性能没有显著影响。虽然本文提供的数据可能不足以回收废水，但对分离性能的了解将作为可行性研究。较少

项目成果

Koide, S., N.Satta, H.Kofujita: "Concentration by electrodialysis of L-ascorbic acid from wastewater coming from the immersion process at a potato processing plant"Journal of Japanese Society of Agricultural Machinery. 63(6). 68-72 (2001)

Koide, S., N.Satta, H.Kofujita：“通过电渗析从马铃薯加工厂浸泡过程中产生的废水中浓缩 L-抗坏血酸”日本农业机械学会杂志。

Koide, S., N. Satta, H. Kofujita: "Concentration by electrodialysis of L-ascorbic acid from wastewater coming from the immersion process at a potato processing plant"Journal of Japanese Society of Agricultural Machinery. 63(6). 68-72 (2001)

Koide, S.、N. Satta、H. Kofujita：“通过电渗析从马铃薯加工厂浸泡过程中产生的废水中浓缩 L-抗坏血酸”日本农业机械学会杂志。