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library name : انستیتو تغذیه دانشگاه علوم پزشکی شهید بهشتی
Material Type : Latin Articles
Language of Document : English
Record Number : 61578
Doc. No : 229A
Main Entry : NOURI SEPEHR M
Title & Author : CHROMIUM BIOREMOVAL FROM TANNERY INDUSTRIES EFFLUENT BY ASPERGILLUS ORYZAE [Article]; YAGHMAEIAN K.
Title : IRANIAN JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING (IJEHSE)
Volume Number : , Vol.2 ؛ No.4
Date : , (2005)
page : : 273 - 279
Abstract : Recently laboratory studies had recognized the capability of alge, fungi, and bacteria in the removal of heavy metals from industrial effluent. In this research, growth of Aspergillus oryzae in the tanning house effluent, and its capability in chromium bioremoval were assessed. Aspergillus oryzae can grow in different concentration of Cr+, 120-1080 mg/l. Maximum biomass growth and chromium removal rate at pH, 3.3, Cr+3 concentration equal to 240 mg/l and inoculum size equal to 0.12percent )dry weight( were 0.25percent )dry weight ( and 94.2percent, respectively. Effects of various factors such as pH, temperature, shaking velocity and nutrients were also investigated. At optimum conditions )ie: pH=5; temperature=30?C, shaking velocity = 150 rpm, and nitrogen source of dihydrogen ammonium phosphate concentration=0.3percent(, biomass growth and chromium removal rate were found as 0.45percent of dry weight and 99.8percent, respectively. Effect of detention time showed that after 30h, biomass growth and chromium removal rate were 0.28percent and 97.6percent, respectively. Statistical studies on factors such as pH, temperature, shaking velocity, type and concentration of nutrients on theع biomass growth عandع residual chromium ,عshowed that all of the factors had significant effects ) ? = 0.05, P < 0.001 (. Therefore A.niger capable grows in the tannery industries effluent with 240 mg/l chromium and 97.6percent chromium removal rate.
Descriptor : TANNERY INDUSTRIES EFFLUENT
Descriptor : CHROMIUM
Descriptor : BIOREMOVAL
Descriptor : ASPERGILLUS ORYZAE
Added Entry : NASERI S.
: MAZAHERI ASADI MAHNAZ
 
 
 
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