Greenhouse evaluation of struvite and sludges from municipal wastewater treatment works as phosphorus sources for plants.
Greenhouse evaluation of struvite and sludges from municipal wastewater treatment works as phosphorus sources for plants.
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对作为植物磷源的城市废水处理厂的鸟粪石和污泥进行温室评估。
DOI：
10.1021/jf071563y
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发表时间：
2007
影响因子：
6.1
通讯作者：
M. F. Colmenarejo
中科院分区：
文献类型：
--
作者：
C. Plaza;R. Sanz;C. Clemente;J. Fernández;R. González;A. Polo;M. F. Colmenarejo
采用常规好氧活性污泥法（CSS）、强化生物除磷工艺（PRS）的富磷污泥和以天然菱镁矿煅烧产生的低品位MgO为镁源（STR）的厌氧消化池上清液中的鸟粪石（MgNH 4PO 4x 6 H2O）作为植物生长的磷源。为此，在温室盆栽条件下，以缺磷壤土和多年生黑麦草（Lolium perenne L.）作为试验作物。磷源的应用率相当于0，9，17，26，34，和44毫克/公斤P。单一过磷酸钙（KTP）被用作参考与其他磷源进行比较。结果表明，在提高黑麦草干物质产量和供磷方面，短效秸秆还田与秸秆还田同样有效。相比，秸秆和STR，PRS，特别是CSS表现出较低的农学效果作为P源，这可能是由于，至少部分地，更大的土壤磷固定，因为大量的铁与这些材料。
Sewage sludge obtained by a conventional aerobic activated sludge process (CSS), P-rich sewage sludge from an enhanced biological P removal process (PRS), and struvite (MgNH 4PO 4 x 6H 2O) recovered from an anaerobic digester supernatant using a low-grade MgO byproduct from the calcination of natural magnesite as a Mg source (STR) were evaluated as P sources for plant growth. For this purpose, a greenhouse pot experiment was conducted using a P-deficient loamy sand soil and perennial ryegrass ( Lolium perenne L.) as the test crop. The P sources were applied at rates equivalent to 0, 9, 17, 26, 34, and 44 mg/kg P. Single superphosphate (SUP) was used as reference for comparison with the other P sources. The results obtained indicated that STR was as effective as SUP in increasing the dry matter yield and supplying P to ryegrass. Compared to SUP and STR, PRS and especially CSS exhibited less agronomic effectiveness as P sources, which may be attributed, at least partially, to greater soil P fixation because of the larger amount of Fe incorporated with these materials.