公共污水污泥特性及堆肥再利用之研究

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公共污水污泥特性及堆肥再利用之研究

Characteristic of Public Wastewater Sewage Sludge and it’s Reuse in Composting

陳家榮 , Masters　　Advisor：程淑芬　　

繁體中文

生物有效性；鍵結型態；重金屬；污泥；青江菜； Bond Fraction ； Heavy Metals ； Sewage Sludge ； Bioavailability ； Bok Choy

Abstract │ Reference (96) │ Times Cited (1) │ Altmetrics

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Sewage sludge is rich in plant nutrients, but it is also loaded with heavy metals. Prolong use of sewage sludge as fertilizer or soil conditioner may cause phytotoxicity in reducing lead productivity and problem in produce’s palatability. Municipal wstewater sludge from there treatment plants, i.e. Lin-Ko, Fu-Tien and An-Ping in Wstewater Treatment Plants Taiwan were sample of investigated in this study. Results indicated that sewage sludge contains 217.3~256.3 mg/kg for Cu; 109.2~284.1 mg/kg for Cr; 0.3~9.7 mg/kg for Cd; 54.3~87.4 mg/kg for Pb; 80.6~272.3 mg/kg for Ni and 1154.0~2761.7 mg/kg for Zn.
Morphology of bonding from of these metals in sludge is an important factor in determining the bioavailability of the matal. The study shows that most Cu, about 75.8%, exists in organic bond fraction; most Cr, 75.8%, in residual fraction; the largest share of Cd ,40.8%, in Fe-Mn oxides bond; most Pb about 78.2% in residual fraction; the largest share of Ni about 46.2% in residual fraction and Zn is about 42.2% in Fe-Mn oxides bond. 
Although sludge and sawdust composting contains Cu, Cd, Ni and Zn with concentrations exceeding the maximum legal limits in organic fertilizer, the dominating bond fraction of these metals are all of low bioavailability, i.e. Fe-Mn oxides bond, organic bond and residual fractions. Composting process, reduces Pb contents in residual fraction, and increases exchangeable fraction.
The bok choy growth reveals that the adding different proportions of sludge compost in soil, the crop of the second round contains Pb ranged from 0.5~0.6 mg/kg on fresh weight basis, while third round contents ranged from 0.3~0.9 mg/kg.These contexts exceed the limit set by the Department of Health for edible crops at 0.3 ppm Pb.
The data also show Pb in produce of the third round primarily prevails in exchangeable fraction which is of highest both in bioavailability and mobility of heavy metals in soil.

Reference ( 96 ) 〈TOP〉

1.王世忠、胡紹華、何志軒、陳素華，「都會下水污泥環境特性與資源化的回顧」，資源與環境學術研討會，花蓮，第489-501頁 (2007)。
連結：
5.江國忠，「有機農業之土壤培育及堆肥製作與使用」，花蓮區農業專訊15: 9-11 (1996)。
連結：
17.張文翰，「下水污泥混合皂土與水淬爐石堆肥化過程之重金屬型態轉變」，碩士位論文，國立屏東科技大學環境工程與科學系，屏東(2010)
連結：
37.嚴筱婷，「下水污泥混合皂土與水淬爐石堆肥化過程之重金屬型態轉變」，碩士位論文，國立屏東科技大學環境工程與科學系，屏東(2009)。
連結：
38.Alloway, B. J., Heavy metals in soils, John Wiley and Sons, New York, pp. 100-124 (1990).
連結：

Times Cited (1) 〈TOP〉

黃晨漢(2015)。以電動力法去除下水污泥中重金屬之研究。朝陽科技大學環境工程與管理系學位論文。2015。1-84。

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