Abstract：
:Natural polyelectrolytes are suitable coagulants for the treatment of industrial and minicipal wastewaters because they are safe and have environmental benefits. Chitosan, a natural cationic polyelectrolyte, and other similar coagulants were used in the treatment of an olive oil water suspension as a model for the processing wastewater. The effect of chitosan, starch, alum and ferric chloride on the coagulation of oil droplets were determined by the jar test apparatus and turbidometric measurements. Olive oil emulsion samples were prepared by the use of surface active agents and other agents that could form stable oil water emulsions. The effect of parameters such as pH, ionic strength and optimum dosage of the coagulants were determined in the jar test experiments. Following the jar experiments, with the optimum concentration of the suitable coagulant, the emulsions were placed in an induced air flotation (IAF) cell to separate the coagulated oil droplets from solution. In the air flotation experiments, the effect of temperature, surfactant concentration and air flowrate were determined on the decrease of turbidity and COD of the emulsion samples. In the jar experiments, chitosan and alum used together at concentrations of 15 and 25 ppm, respectively, at pH 6 produced the lowest turbidity values. In the air flotation experiments, a concentration of 100 ppm of chitosan, an air flowrate of 3 l/min, aeration time of 45 s, temperature of 20 degrees C and pH 6 produced optimum levels. At optimum conditions of coagulation and flotation stages, the COD of the olive oil emulsion could be reduced by 95%.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Meyssami B,Kasaeian ABdoi
10.1016/j.biortech.2004.04.014subject
Has Abstractpub_date
2005-02-01 00:00:00pages
303-7issue
3eissn
0960-8524issn
1873-2976pii
S0960852404001567journal_volume
96pub_type
杂志文章abstract：:New solvents for pretreating wheat straw, mixtures of cholinium amino acids ionic liquids ([Ch][AA] ILs) and glycerol, were developed. As a typical result, 50% cholinium alanine-glycerol is capable of removing 67.6% lignin while reserving 95.1% cellulose (90°C, L/S mass ratio of 20:1, 6h) and the conversions of cellul...
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更新日期：2013-07-01 00:00:00
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更新日期：2018-09-01 00:00:00
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更新日期：2017-11-01 00:00:00
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更新日期：2008-01-01 00:00:00
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pub_type： 杂志文章,评审
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更新日期：2019-10-01 00:00:00
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journal_title：Bioresource technology
pub_type： 杂志文章
doi：10.1016/j.biortech.2014.11.092
更新日期：2015-02-01 00:00:00
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更新日期：2012-09-01 00:00:00
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更新日期：2019-12-01 00:00:00
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更新日期：2015-11-01 00:00:00
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更新日期：2009-08-01 00:00:00
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更新日期：2019-10-01 00:00:00
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journal_title：Bioresource technology
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更新日期：2020-12-16 00:00:00
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journal_title：Bioresource technology
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更新日期：2013-03-01 00:00:00
abstract：:A one-stage airlift internal circulation biofilm reactor was continuously operated for 668 days to treat 50 mg/L of ammonia wastewater to pursue the long-term stability of partial nitritation and anammox (PNA) process. The operational performance and microbial community structure of the biofilm and the flocs were inve...
journal_title：Bioresource technology
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journal_title：Bioresource technology
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更新日期：2011-01-01 00:00:00
