The reuse of oily wastewater produced from al-Duora refinery

Dissertant

al-Janabi, Manhal Isa

Thesis advisor

al-Ani, Faris Hammudi Muhammad

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Master

Degree Date

2012

English Abstract

Every year, large quantities of wastewater are produced from the refinery processes.

For the time being, regulations imposed on water pollution have become tighter and the conventional methods perform poorly.

So, in addition to decreasing the demand of water the need for high quantity effort had rise.

Large quantities of water are consumed in Al-Doura Oil Refinery which is one of the biggest refineries in Iraq, so the study was conducted to reduce the required water quantity by studying the possibility to reuse the effluent of wastewater treatment plant as a makeup for cooling system.

The study consists of two parts: The first part was studying the performance of treatment plant and effluent characteristics.

Influent concentrations for some important contaminants such that TDS, oil and grease, TSS, COD, BOD, and turbidity were 2595 mg/L, 13934 mg/L, 466.45 mg/L, 2538.9 mg/L, 1739.2 mg/L, and 89.18 NTU, respectively, while the effluent concentra ons were 1337.8 mg/L, 0.53mg/L, 21.7mg/L, 25.45 mg/L, 17.81 mg/L, and 7.08 NTU, respec vely giving removal efficiencies of 44.47%, 99.99%, 94.4%, 98.96%, 98.96% and 92.05%, respectively.

All these results indicate that Al-Doura wastewater treatment plant was efficient in removing contaminants according to Iraqi and EPA Specifications, but the effluent cannot be used as a makeup for cooling system.

So, the second part of this study concentrated on finding a simple and efficient treatment method to treat the effluent so it can be reused in cooling system.

A pilot plant was designed and concentrated for this purpose including three units, granular activated carbon filter, ultrafiltration filter, and reverse osmosis filter.

Average removal efficiencies of oil and grease, turbidity, COD, and BOD were 85.25%, 100%, 34.92%, and 31.11%, respectively at granular activated carbon filter and very low efficiencies for the removal of TDs and conductivity.

Ultra filtration gives average removal efficiencies for COD and BOD of 30.81% and 32.31%, respectively.

While the average removal efficiencies for TDs and conductivity was very low.

Reverse osmosis filter remove TDs and conductivity very efficiently giving average removal efficiencies of 97.63% and 95.43%, respectively.

In addition to good removal percent for COD and BOD obtained with values 61.73% and 64.1%, respectively.

All tested parameters of produced effluent were within the allowable limits required for cooling water.

So, it can be used in Al-Doura Refinery cooling system.

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Topics

• Energy conservation
• Waste treatment

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-419805