A Survey of Water Consumption and Product Output from Ten Sago Factories in India

A., Manickavasagan and K., Thangavel (2006) A Survey of Water Consumption and Product Output from Ten Sago Factories in India. Pertanika Journal of Tropical Agricultural Science, 29 (1 & 2). pp. 67-72. ISSN 1511-3701

[img] PDF
1913Kb

Abstract

Most of the tapioca processing units in India separate starch from slurry by employing the gravity settling method. Sedimentation in settling tanks allows the contact of starch with water. This process leads to fermentation in which alcohols and organic acids are formed and polluting the environment. Wastewater from tapioca processing factories contain high chemical oxygen demand (11,077-19, 083 mg t l), low pH (4.33-5.60) and causes pollution. The effluent from tapioca industries is acidic and organic in nature, contributing biological oxygen demand in the range of 1500 to 2000 g mojo Inorganic constituents like phosphate, sulphate, chloride, and several metals are also found in trace quantities. This paper explains the water consumption, product output and effluent generation in tapioca processing industries. The average water requirement was 4.512 ml to process 1000 kg ofcassava tubers. When the tubers are used for starch manufacture, a product yield of 16. 7% starch, 1.6% dirty starch and 7.0% thippi were obtained, and 18.6% sago, 1.8% dirty starch, 19.1% peel and 3.9% thippi were obtained when the tubers are used for sago manufacture. About 95% of the consumed water is leaving the factory as effluent.

Item Type:Article
Keyword:Tapioca effluent, water requirement, product yield
Publisher:Universiti Putra Malaysia Press
ID Code:3662
Deposited By: Farhana Yusof
Deposited On:01 Dec 2009 00:53
Last Modified:27 May 2013 07:10

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 01 Dec 2009 00:53.

View statistics for "A Survey of Water Consumption and Product Output from Ten Sago Factories in India"


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.