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At least 37 records · Page 2Linked to original sources
PubMed2003

[Electrical charge and flocculation of composite flocculants made of polyaluminium].

A series of composite flocculants polyaluminium chloride (PAC)-polydimethydiallyammonium chloride (PDMDAAC) was prepared by using PAC with different basicity (B) and PDMDAAC was raw materials. The electrical charge of PAC-PDMDAAC was studied by electrophoretic mobility method. And the flocculating efficiency of PAC-PDMDAAC on treating water from Yellow River was also preliminarily examined by Jar-test. The experimental results show that the PAC-PDMDAAC is characterized by giving higher positive Zeta potential value and better flocculating effect than PAC. The B value of PAC and the content (P) of PDMDAAC in PAC-PDMDAAC had some effect on the Zeta potential and the turbidity-removal efficiency.

Aluminum Chloride↗
PubMed1978

[Flocculant interaction with native antibiotic solutions. The effect of flocculants on the quality indices of native solutions as dependent on a number of factors].

Flocculants had a significant effect on the characteristics of the fermentation broth filtrates of some antibiotics. They decreased the filtrate turbidity, concentration of the organic ballast, etc. The size of the floccules depended on a number of factors, including the fluocculant concentration, agitation rate, concentration of the dispersing phase in the initial filtrate. The optimal concentration of the flocculant was defined not only by the type of the antibiotic-producing organism but also by composition of the nutrient medium used for the biosynthesis. Floccculant treatment provided a significant increase in the quality of the fermentation broth filtrates with respect to the main parameters: levels of proteins, pigments, emulgation capacity.

Anti-Bacterial Agents↗
PubMed1998

Breeding of flocculent industrial alcohol yeast strains by self-cloning of the flocculation gene FLO1 and repeated-batch fermentation by transformants.

A nonflocculent industrial polyploid yeast strain, Saccharomyces cerevisiae 396-9-6V, was converted to a flocculent one by introducing a functional FLO1 gene at the URA3 locus. The flocculent strain FSC27 obtained was a so-called self-cloned strain, having no bacterial DNA. FSC27 cells could be easily recovered for reuse from fermentation mash without any physical energy. The strain produced a concentration of alcohol as high as 396-9-6V, although the fermentation rate of FSC27 was slightly lower than that of 396-9-6V. When uracil was added to the medium or when URA3 was reintroduced into FSC27 (named FSCU-L18), the fermentation rate and the growth rate increased, and the ethanol concentration produced was higher than that produced by the parent strain. The stable flocculation and high ethanol productivity were observed by using FSCU-L18 during 10 cycles of repeated-batch fermentation test.

Journal Article↗
PubMed1986

[The use of flocculation sludge in poultry feed. The effect of feeding flocculation sludge on the quality of broiler chickens].

Broiler chickens were fattened for six weeks with feeds, to which 0%, 7.5% or 15% of dried flocculated sludge had been added. Tests were performed on the slaughtered birds with regard to microbiological and sensory characteristics. In addition, the concentrations of various (heavy) metals in the meat of the breast and leg were determined. Specimens of the tissues of various organs were also subjected to histopathological examination. Except for a still unaccountable increase in juicyness of the flesh of the legs of the 7.5% group and a reduction of the zinc level in that of the breast and legs, any other effects attributable to the incorporation of dried flocculated poultry sludge in the diets were not detectable.

Animal Feed↗