Evaluation of horizontal flow roughing filtration performance

Dissertant

Habib, Zaynab Sabor

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

2008

English Abstract

The water treatment plants in Iraq suffer from the high level, of turbidity therefore the treatment of drinking water by using horizontal - flow roughing filtration, HRF system is one solutions The HRF was studied by using pilot plant.

This pilot plant was designed and applied in Al - Wehda Water Treatment Plant which treats the raw water of Tigris River in Al - Karradab in Haghdad city. Design characteristics of the pilot HRF are 5.5m length * lm width * lm depth , the HRh length consists of inlet ( 0.5 m), outlet (0.5 m) and three compartments ( 2m, 1.5m and 1m) filled with three different size of gravel (15mm .

10mm and 5mm) respectively . The HRF was continuously operated (24 h in a day) during the period from May / 2007 to July / 2007 Operated done in two stages.

In the first stage , raw water (free from any addition) was used, with three different flow rate 1.3 .1.1 and 0,9 m3 / h , While in the second stage, coagulated water ( raw water + alum ) was used, with flow rate 1,3 m3 / h . To assessed the performance of HRF.

The required tests were carried out.

These tests are Turbidity, S.

S, Temperature, pH and Bacteriological tests.

The results of tests were analyzed statistically. The mean of removal efficiency of turbidity for first stage with discharges1.3 - 1.1 and 0.9 m3 / h is 92 %, 94 % and 95 % respectively.

and for second stage is 97 % . The mean of removal efficiency of S.S for first stage with discharges 1.3 , 1.1 and 0.9 m3 / h is 93 % , 95 % and 96 % respectively , and for second stage is 96 % , The removal efficiency of T.P.C/ ml.

M.

P.

N of Coli form / 100ml and M.P.N of E-coli /100ml for first stage with discharge 1.3 m3 / h ranged between ( 25 % - 88 % ) , (65 % - 90 % ) and ( 0 % - 90 % ) respectively .

and for second stage with discharge 1.3 nV / h ranged between (31 % - 93% ), ( 81 % - 100% ) and 100 % respectively. These results indicate the high performance of HRF in turbidity and suspended solids removal with good removal of bacteria, Other findings are reported in this study.

Main Subjects

Civil Engineering

Topics

• Water
• Iraq

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305597