Phosphorous Recycling from Pre-Coagulated Wastewater Sludge
Phosphorous Recycling from Pre-Coagulated Wastewater Sludge
复制标题
预混凝废水污泥中磷的回收
DOI：
10.1007/978-3-642-59791-6_33
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
H. Ødegaard
中科院分区：
文献类型：
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作者：
Y. Watanabe;T. Tadano;T. Hasegawa;Y. Shimanuki;H. Ødegaard
世界上现存的磷矿数量是有限的。因此，大力发展再生磷利用技术，构建再生磷利用的社会体系具有重要意义。城市废水含有5至10毫克/升的悬浮态和可溶态磷。采用预混凝法分离城市污水中的磷，并利用植物功能分泌酸性磷酸酶和有机酸，使预混凝后的污泥释放出可溶性无机磷，酸性磷酸酶和有机酸如柠檬酸分别从有机磷和难溶性无机磷中释放出可溶性无机磷。在由喷射混合分离器和倾斜管沉降器组成的固液分离单元中进行预凝污泥的生产。该装置在添加5 mgAl/l的聚合氯化铝的情况下从城市污水中去除超过90%的总磷。一种抑制聚硅酸铁聚合的生产方法，一种在预混凝方案中似乎优于铝混凝剂的新混凝剂。还描述在酸性磷酸酶和有机酸的作用下，预凝污泥中的磷化合物被转化为可溶性无机磷酸盐。剩余污泥用作甜菜的磷肥，当在根室中加入酸性磷酸酶时，与在缺磷条件下获得的干重相比，产生约5倍的干重。
The amount of rock phosphorous remained in the world is limited. Therefore, it is important to develop the technology and construct the social system for use of recycled phosphorous. Municipal wastewater contains 5 to 10 mg/1 of phosphorous on suspended and soluble forms. This paper deals with separation of phosphorous from municipal wastewater by pre-coagulation, and use of plant functions to secrete acid phosphatase and organic acids that lead to release of soluble inorganic phosphate from the pre-coagulated sludge.Acid phosphatase and organic acids such as citricacid will release soluble inorganic phosphate from organic phosphates and hardly soluble inorganic phosphates, respectively. Production of pre-coagulated sludge took place in a solid liquid separation unit consisting of the jet mixed separator and inclined tube settlers. The unit removed more than 90 % of total phosphorous from municipal wastewater with the addition of poly aluminum chloride of 5 mgAl/l. A production method to depress the polymerization of the polysilicato iron, a new coagulant that seems to be preferable to aluminum coagulants in the pre-coagulation scheme. is also described. Phosphorous compounds contained in the pre-coagulated sludge were transformed to soluble inorganic phosphates by acid phosphatase and organic acids. The excess sludge worked as a phosphate fertilizer for sugar beet, resulting in about 5 times the dry weight compared that obtained in the phosphate-deficient condition when acid phosphatase was added in the root compartment.
从根系角度观察豆类的功能
DOI：
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发表时间：
2005
期刊：
佐賀大学海浜台地生物環境研究センターシンポジウム要旨集
影响因子：
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作者：
高柳 勉;阿野明彦;奥田 徹;横塚弘毅;K.Kitahara;大門弘幸
通讯作者：
大門弘幸