期刊
WATER RESEARCH
卷 45, 期 18, 页码 5977-5986出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2011.08.062
关键词
Metal leaching; Nutrient leaching; Phosphate; Sludge; Lactobacillus buchneri; Lactobacillus plantarum; Recirculating aquaculture system (RAS)
资金
- EU [COLL-CT-2003-5003 05]
A fish farm sludge high in P (2-6% w/w as thy matter), Fe (5-7%), C (40-50%) and N (0.8-4%) was subjected to a series of acid leaching treatments using HCl, organic acids, and biologically mediated acid production. Additions of biodegradable organic acid solubilized heavy metals better than HCl, while additions of 1.5% w/v glucose followed by 7 day incubation stabilized the sludge releasing 92% P, 100% Fe. The use of homo-lactic Lactobacillus plantarum starter cultures were more effective than hetero-lactic Lactobacillus buchneri, solubilizing 81.9% P, 92.2% Fe, 93.0% Zn and 96.4% Ca in the sludge. The anaerobic sludge-glucose fermentation using L. plantarum produced a leached sludge that has low heavy metal and nutrient content while affording the recovery of nutrients. The potential of these methods for practical application are briefly discussed. (C) 2011 Elsevier Ltd. All rights reserved.
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