Treatment of vegetable oil mill effluent using crab shell chitosan as adsorbent

被引:29
作者
Devi, M. Geetha [1 ]
Al-Hashmi, Z. S. Shinoon [1 ]
Sekhar, G. Chandra [2 ]
机构
[1] Caledonian Coll Engn, Dept Mech & Ind Engn, Muscat, Oman
[2] Pondicherry Engn Coll, Dept Chem Engn, Pondicherry, India
关键词
Adsorption; Biodegradable polymer; Chemical oxygen demand; Effluent treatment; Vegetable oil refinery; WASTE-WATER; INDUSTRY;
D O I
10.1007/s13762-012-0100-4
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, a naturally available crab shell chitosan of low molecular weight (20 kDa) has been used as adsorbent to evaluate the pollution load in vegetable oil mill effluent. A series of batch experiment was conducted by varying chitosan dosage (100-400 mg), pH (2-9), stirring time (15-90) min and agitation speed (25-150 rpm) to study their effects on adsorption and flocculation processes. The parameters considered for adsorption study are chemical oxygen demand, total suspended solids, electrical conductivity and turbidity. The maximum reduction in chemical oxygen demand, total suspended solids, electrical conductivity and turbidity is 74, 70, 56 and 92 %, respectively. The observed experimental result showed that crab shell chitosan could able to reduce significantly the chemical oxygen demand, turbidity, electrical conductivity and suspended matter. The optimum conditions were estimated as 400 mg/l chitosan, pH 4 and 45 min of mixing time with mixing speed of 50 rpm. Chitosan showed very good pollution removal efficiency and can be used for the effective treatment of vegetable oil mill effluent.
引用
收藏
页码:713 / 718
页数:6
相关论文
共 39 条
[1]  
Agha NC, 1998, AFR J BIOTECHNOL, V2, P234
[2]   Ultrafiltration behavior in the treatment of agro-industry effluent: Pilot scale studies [J].
Ahmad, AL ;
Ismail, S ;
Bhatia, S .
CHEMICAL ENGINEERING SCIENCE, 2005, 60 (19) :5385-5394
[3]  
American Public Health Association (APHA), 1998, STAND METH AN WAT WA, V20, P1270
[4]   HYDROGEN-ION TITRATION OF CHITOSANS WITH VARYING DEGREES OF N-ACETYLATION BY MONITORING INDUCED H-1-NMR CHEMICAL-SHIFTS [J].
ANTHONSEN, MW ;
SMIDSROD, O .
CARBOHYDRATE POLYMERS, 1995, 26 (04) :303-305
[5]   Synthetic polyelectrolytes of varying charge densities but similar molar mass based on acrylamide and their applications on palm oil mill effluent treatment [J].
Ariffin, A ;
Shatat, RSA ;
Norulaini, ARN ;
Omar, AKM .
DESALINATION, 2005, 173 (03) :201-208
[6]   Comparative evaluation of a laboratory and full-scale treatment alternatives for the vegetable oil refining industry wastewater (VORW) [J].
Azbar, N ;
Yonar, T .
PROCESS BIOCHEMISTRY, 2004, 39 (07) :869-875
[7]  
Bough W.A., 1978, Mar. Resour. Ext. Cent, P218
[8]   CURRENT POLLUTION-CONTROL PRACTICES IN THE UNITED-STATES [J].
BOYER, MJ .
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1984, 61 (02) :297-301
[9]   Improved combined chemical and biological treatments of olive oil mill wastewaters [J].
Bressan, M ;
Liberatore, L ;
D'Alessandro, N ;
Tonucci, L ;
Belli, C ;
Ranalli, G .
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2004, 52 (05) :1228-1233
[10]  
Chipasa KB, 2001, POL J ENVIRON STUD, V10, P141