search
for
 About Bioline  All Journals  Testimonials  Membership  News  Donations


Iranian Journal of Environmental Health, Science and Engineering
Iranian Association of Environmental Health (IAEH)
ISSN: p-ISSN: 1735-1979
Vol. 1, No. 1, 2004, pp. 1-4
Bioline Code: se04001
Full paper language: English
Document type: Research Article
Document available free of charge

Iranian Journal of Environmental Health, Science and Engineering, Vol. 1, No. 1, 2004, pp. 1-4

 en Performance of a Direct Horizontal Roughing Filtration (DHRF) System in Treatment of Highly Turbid Water
A H Mahvi, M Ahmadi Moghaddam, S Nasseri and K Naddafi

Abstract

Vertical or horizontal flow gravel beds can be used in water treatment as roughing filters. In order to improve the performance of horizontal flow roughing filtration (HRF) this process has been modified earlier by applying a constant coagulant dose prior to filtration named direct horizontal roughing filtration (DHRF). In this research a lab scale DHRF pilot plant was used for investigate DHRF performance. The study results indicated that DHRF (6.5 m long consisting of 2.5 m first compartment with 12-18 mm diameter grain, 2 m/s compartment with 8-12 mm diameter and 1.5m third compartment with 4-8 mm diameter) was systematically yielded good effluent quality (<2NTU, C.I=0.95) with raw water quality of 200-400 NTU. DHRF is a versatile pretreatment process capable of handling wide fluctuation in raw water turbidity (200-400 NTU) while operating condition such as coagulant dose [2mg Fe (III)/L], mixing intensity, time and filtration rate remained unchangeable.

Keywords
Direct horizontal roughing filter, Treatment, Highly turbid water

 
© Copyright 2004 - Tehran University of Medical Sciences Publication
Alternative site location: http://diglib.tums.ac.ir/pub/

Home Faq Resources Email Bioline
© Bioline International, 1989 - 2019, Site last up-dated on 10-Jul-2019.
Site created and maintained by the Reference Center on Environmental Information, CRIA, Brazil
System hosted by the Internet Data Center of Rede Nacional de Ensino e Pesquisa, RNP, Brazil