The Technology of Phosphorous Removal and Recovery from Swine Wastewater by Struvite Crystallization Reaction

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
40-04-07.pdf689.41 KB

Swine wastewater has a high potential for phosphorous recovery in Japan. The pH of swine wastewater increased up to approximately 8.5 with continuous aeration, and a large part of the soluble PO4-P, Mg and Ca was crystallized. A reactor for removing and recovering phosphorous from swine wastewater was designed with a dual function i.e., crystallization through aeration, and separation of formed struvite by settling. However, a dehydration, composting and characterization process was first needed before using sediment sludge, including struvite, on farmland, since it will settle along with huge amounts of other suspended solids (organic matter). For the recovery of pure struvite, an accumulation device was designed and its efficiency was examined. During submergence in the aeration column of the demonstration reactor, struvite cross-bridged and it accumulated on the face of the device. The struvite could be scraped off easily with only a light brushing, and was found to be approximately 95% pure. Because this device is made of a very simple structure, it should be acceptable to swine farmers.

作成者 SUZUKI Kazuyoshi TANAKA Yasuo KURODA Kazutaka HANAJIMA Dai FUKUMOTO Yasuyuki YASUDA Tomoko



magnesium ammonium phosphate


公開者 Japan International Research Center for Agricultural Sciences
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 341
終了ページ 349
DOI 10.6090/jarq.40.341
権利 Japan International Research Center for Agricultural Sciences
言語 eng