Efficient Phosphorus Cycling in Food Production: Predicting the Phosphorus Fertilization Effect of Sludge from Chemical Wastewater Treatment.
Efficient Phosphorus Cycling in Food Production: Predicting the Phosphorus Fertilization Effect of Sludge from Chemical Wastewater Treatment.
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食品生产中的高效磷循环：预测化学废水处理污泥的磷肥效果。
DOI：
10.1021/acs.jafc.5b05974
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发表时间：
2016
影响因子：
6.1
通讯作者：
E. Brod
中科院分区：
文献类型：
--
作者：
Anne Falk Øgaard;E. Brod
通过盆栽试验，研究了11种污水污泥的磷肥施用效果，其中11种污泥是经过铝盐或铁盐处理后去除磷的，并与多花黑麦草（Lolium multiflorum）和营养缺乏的砂-泥炭混合物进行了比较。还调查了施肥效果是否可以通过化学污泥特性和/或通过P提取来预测。矿物肥料当量（MFE）值变化显着，但所有污泥低。MFE是最好的预测与ox-Al和ox-Fe在污泥中的负相关性，或与2%柠檬酸提取的P的正相关性。Ox-Al对MFE的负面影响大于ox-Fe，表明铁盐作为混凝剂是优选的，目的是增加污泥中P的植物可用性。结果还表明，污泥石灰后，化学废水处理与铝和/或铁盐增加磷肥的效果。
This study examined the P fertilization effects of 11 sewage sludges obtained from sewage treated with Al and/or Fe salts to remove P by a pot experiment with ryegrass (Lolium multiflorum) and a nutrient-deficient sand-peat mixture. Also it investigated whether fertilization effects could be predicted by chemical sludge characteristics and/or by P extraction. The mineral fertilizer equivalent (MFE) value varied significantly but was low for all sludges. MFE was best predicted by a negative correlation with ox-Al and ox-Fe in sludge, or by a positive correlation with P extracted with 2% citric acid. Ox-Al had a greater negative impact on MFE than ox-Fe, indicating that Fe salts are preferable as a coagulant when aiming to increase the plant availability of P in sludge. The results also indicate that sludge liming after chemical wastewater treatment with Al and/or Fe salts increases the P fertilization effect.