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首页> 外文期刊>RSC Advances >Phosphorus removal and recovery from dairy manure by electrocoagulation
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Phosphorus removal and recovery from dairy manure by electrocoagulation

机译：通过电凝去除乳牛粪中的磷并从中回收

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摘要

Livestock manure waste, containing high level of phosphorus (P) will impair water environment if it is directly discharged to water body or improperly land applied. P recovery from animal manure not only addresses its environmental concerns, also provides a value added product as a fertilizer for better managing P. Electrocoagulation (EC) is proved to be an efficient approach that can be applied in the municipal and industrial wastewater for P removal and recovery; however, its application in the livestock manure management is less researched, especially with different selection of the electrode materials. In this study, EC process was evaluated on P removal and recovery from dairy manure. Four commonly seen electrodes, including Al, stainless steel, low carbon steel and cast iron, were compared. The results showed low carbon steel achieved the most efficient P removal (96.7%). The average particle size of manure solids was increased from 32.2 to 126.9 mu m. The simulation experiment suggested that iron release and hydrolysis, which then worked as coagulants, is the major mechanism for P removal. EC by low carbon steel is an effective method for P separation from liquid phase of dairy manure to solid phase.
机译：如果将高含量磷（P）的畜禽粪便直接排放到水体或土地使用不当，将会损害水环境。从动物粪便中回收磷不仅解决了环境问题，还提供了增值产品，可作为更好地控制磷的肥料。电凝（EC）被证明是一种有效的方法，可用于市政和工业废水中去除P和恢复;然而，其在牲畜粪便管理中的应用研究较少，尤其是在电极材料选择不同的情况下。在这项研究中，评估了乳制品中磷的去除和回收的EC工艺。比较了四个常见的电极，包括铝，不锈钢，低碳钢和铸铁。结果表明，低碳钢实现了最有效的除磷效果（96.7％）。粪便固体的平均粒径从32.2微米增加到126.9微米。模拟实验表明，铁的释放和水解然后用作凝结剂，是除磷的主要机理。低碳钢的EC是从乳牛粪液相到固相分离P的有效方法。

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