| 知識類型 | 期刊 |
| 標題 | Biochar Produced from Anaerobically Digested Fiber Reduces Phosphorus in Dairy Lagoons |
| 作者 | Jason D. Streubel, Harold P. Collins, Julie M. Tarara, Rebecca L. Cochran |
| 名稱(期刊/節目) | Journal of Environmental Quality |
| 期刊期數/節目集數 | Volume 41, Issue 4, Pages 1166-1174 |
| 出版單位 | Wiley |
| 出版年月日 | 2012/7/1 |
| 原文摘要 | This study evaluated the use of biochar produced from anaerobic digester dairy fiber (ADF) to sequester phosphorus (P) from dairy lagoons. The ADF was collected from a plugged flow digester, air‐dried to <8% water content, and pelletized. Biochar was produced by slow pyrolysis in a barrel retort. The potential of biochar to reduce P in the anaerobic digester effluent (ADE) was assessed in small‐scale filter systems through which the effluent was circulated. Biochar sequestered an average of 381 mg L−1 P from the ADE, and 4 g L−1 ADF was captured as a coating on the biochar. There was an increase of total (1.9 g kg−1), Olsen (763 mg kg−1), and water‐extractable P (914 mg kg−1) bound to the biochar after 15 d of filtration. This accounted for a recovery of 32% of the P in the ADE. The recovered P on the biochar was analyzed using 31P nuclear magnetic resonance for P speciation, which confirmed the recovery of inorganic orthophosphate after liquid extraction of the biochar and the presence of inextractable Ca‐P in the solid state. The inorganic phosphate was sequestered on the biochar through physical and weak chemical bonding. Results indicate that biochar could be a beneficial component to P reduction in the dairy system. |
| 原文摘要簡述 | 此項研究，評估厭氧消化分解池乳纖維(ADF)所產生的生物炭隔離乳製品廢水池中的磷(P)的效用。厭氧消化分解池乳纖維(ADF)是從柱塞流式連續消化分解池中收集的，風乾至含水量小於8％並造粒製成。生物炭是在桶式蒸餾器中緩慢熱裂解產生。在小型過濾系統其循環流出物中，評估生物炭在厭氧消化分解池乳製品廢水(ADE)減少磷(P)的潛力。生物炭從厭氧消化分解池乳製品廢水中平均分離出每公升381毫克的磷(P), 在生物炭表皮層獲得每公升4克的厭氧消化分解池乳纖維(ADF)。經小型過濾系統過濾15天後的厭氧消化分解池乳纖維生物炭總共增加每公斤1.9克的重量，包含歐森礦物質(Olsen)每公斤763毫克以及水溶性磷(WXP) 每公斤914毫克。這數量在厭氧消化分解池乳製品廢水(ADE)所占32%的磷(P)。使用31-磷核磁共振波譜法分析生物炭獲得磷(P)的形態，這證實了液體提取生物炭後獲得固體正磷酸鹽以及固態中存在不可提取的磷化鈣(Ca-P)。從生物炭中透過物理與弱化化學鍵的方式分離出無機磷(P)。實驗結果顯示，生物炭有助於減少乳製品廢水池中磷的成分。 |
| 關鍵字 | AC ( activated charcoal ), ADE ( anaerobic digester dairy effluent ), ADF ( anaerobic digester dairy fiber ), Bd15 ( anaerobic digester dairy fiber biochar after 15 d in filter ), BI ( initial anaerobic digester dairy fiber biochar ), NMR ( nuclear magnetic resonance ), WXP ( water‐extractable phosphorus ) |
| 連結 | https://doi.org/10.2134/jeq2011.0131 |