open access

https://hdl.handle.net/2115/44149

Development of eco-friendly biodegradable flocclant

英語

2010-10-24

「魅力あるポスター賞」受賞

Separation of soil particles in water is very important in both environment and industry. Recently, chemical flocculants are widely used to improve solid- liquid separation, but they are environmentally undesirable. Thus, extracellular polymers produced by bacteria (bioflocculants) has been a topic of intense research. However, it is deficient in practical application. In our laboratory, a novel bioflocculant, methylated soy protein (MeSP), has been developed and its flocculation performance was tested with kaolin suspensions. The flocculation performance of MeSP was much higher than that of commercial polyaluminum chloride (PAC) in terms of supernatant clarity and floc settling velocity. In freshwater and at a fixed flocculant dosage of I wt%, MeSP reduced the relative absorbance to 0 within I min over a wide pH range, while PAC was effective only at around pH 6. In seawater, MeSP (0.5wt% to 3wt%) reduced the relative absorbance to less than 0.1, while PAC was ineffective.

会議発表資料

Not Applicable (or Unknown)