Chitosan from Shrimp as a Natural and Low cost Coagulant Aid for fine suspended and Colluidal solids in Karoon River

  • سال انتشار: 1394
  • محل انتشار: کنفرانس بین المللی علوم، مهندسی و فناوری های محیط زیست
  • کد COI اختصاصی: CESET01_433
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 980
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نویسندگان

Afshin Takdastan

Department of Environmental Health and Environmental Technology, Research Centre, Ahvaz JundiShapur University of Medical Sciences, Ahvaz, Iran

Naghmeh Orooji

Grad. M.Sc. Student of Applied Chemistry, Islamic Azad University,Omidieh Branch, Ahwaz, Iran

Gholamreza Raeesi

Quality control management and health monitoring of Ahwaz Water and Wastewater Company

چکیده

Chitosan, a natural biopolymer,biodegradable, nontoxic, high molecular weight, linear cationic polymerwas evaluated for its ability to be used as a coagulant to treat water for potable use.Chitosan is a biodegradable cationic polymer derived by de-acetylation of chitin. This study aims to investigate the effect of chitosan as a coagulantaidsfor improvement of poly aluminum chloride coagulant in removing the turbiditiesfrom drinkingwater.This study conducted in the laboratory using jar test device in water treatment of Ahvaz.Chitosan was tested as a natural coagulant in the removal of the turbidity of Karoon water to replace inorganic coagulants ( PAC) having hazardous effects. Jar test was performed to test some factors that may affect the coagulation process. The factors tested were dose of coagulant (0-22mg/L), initial pH (5-9), type of oagulant chitosan versus PACcoagulants), and thechitosan solvent.Optimal pH for removing the turbiditieswas observed in pH=8. Optimal dosage of poly aluminum chloride together with chitosan was obtained 5 mg/L and 0.02 mg/L respectively. Under optimal conditions, using chitosan could reduce about 50% of concentration of polyaluminum chloride coagulant.WhenPAC concentration was 10mg/L, by adding 0.02mg/L of chitosan to the process, maximum turbidity removal was %99.16.Results indicate good performance of chitosan as a coagulantaidsfor removing the turbidities from drinkingwater.

کلیدواژه ها

Ahvaz water treatment, Turbidity,Chitosan,Poly aluminum chloride

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