Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Flocculation

Oil Removal from Oilfield Produced Water, North Rumaila by Combination CoagulationFlocculation and Microfiltration Technique

Thamer J. Mohammed; Eman Sh. Awad; Thabit A. Ahmed

Engineering and Technology Journal, 2019, Volume 37, Issue 2C, Pages 204-208
DOI: 10.30684/etj.37.2C.1

The Southern Oil Company, which is operated in North Rumaila oilfield in Basrah/ Iraq, is one of the important companies which produced huge amounts of produced oilfield water. The aim of this study is to treat the produced water by hybrid methods: the process of coagulation-flocculation and microfiltration technique (ceramic membrane) to remove the oil content and improve the water quality to meet the allowable limit of reinjection into the reservoir. Poly-aluminum chloride (PAC), and Ferric Chloride (FeCl3.6H2O) coagulants were used separately and in combination with cationic polyelectrolyte (PE). After produced water was treated with different doses of coagulant, it was passed through the Microfiltration technique/ ceramic membrane (0.5µm) to reach the allowable limit for reinjection. It was found that the best value of oil content after passing through ceramic membrane is 0.2 mg/L at FeCl3.6H2O dose (10 mg/L) combined with PE dose (0.6 mg/L), which was less than the allowable limit for re-injection, (5) ppm.

Compromise Study Between The Hydrate And Dehydrate Coagulate (Alum ,Ferrous sulfate and Ferric Chloride )

Engineering and Technology Journal, 2011, Volume 29, Issue 6, Pages 291-305

This research focuses on the use of hydrate and dehydrate aluminum sulfate (Alum) ,ferrous sulfate and ferric chloride ,Which burnt in different temperatures degrees ,or use U.S.Pat.NO.4105747 to dehydrate of ferric chloride, and compare the result and selected the batter coagulate to remove the turbidity from the water sampling light 6NTU ,medium 55NTU ,high 150NTU turbidity use the jar test to find
the change in PH and turbidity at the same condition .
The study revealed the efficiency of the gradually dehydrate coagulant in reducing the turbidity from prepared samples by continuous burnt when using alum and ferrous sulfate, and when use ferric chloride in continues change from hydrate to dehydrate coagulant.
The hydrate and dehydrate alum is batter coagulant for removal turbidity. The final turbidity from the light sample less than 1NTU and less than 2NTU from the medium samples, less than 3NTU from high samples.
There is no change in the cost by using hydrate or dehydrate alum.
It appears high increase of removal ratio between hydrate and dehydrate alum i.e from 64% to 85% for light samples and from 94% to 98% for medium samples, 91% to 98% increasing removing ratio from high turbidity samples.