INVESTIGATION OF THE EFFECT OF MODIFIED STARCH TO REMOVE OIL FROM OILY WASTEWATER

Ist-International Congress on Modern Sciences, Toskent, Özbekistan, 10 - 11 Mayıs 2022, ss.799-806

A significant pollution removal problem occurs as a result of the mixing of Petroleum Derived

products and wastes (oil) with water. Oil-containing pollutants create significant pollution for

clean water resources and cause a difficult process in wastewater treatment. Oil-containing

pollution is an environmental burden especially created by marine vehicles. Elimination of this

burden is possible with an active treatment and recycling processes as well as requiring strong

disciplined country policies. While discipline is a responsibility of government policies, process

development is a responsibility of facilities dealing with ship waste and recycling. Ship waste

treatment is divided into two main processes, namely dewatering of oil-containing water

mixture and treatment of wastewater. Bilge, sludge, and slop wastes, which are ship wastes,

constitute oil-containing wastes. Sludge wastes are directed as fuel to businesses that have a

process that can be burned directly in their furnaces without any intervention as required by

country legislation. Since slop waste is a waste mixture with high oil content after cleaning

cargo ships, it is first dewatered and then diverted to the separated water treatment processes

and treated. On the other hand, bilge tanks contain lesser amounts of waste oil than others, as

is the composition of many wastewaters. Bilgewater is directed to the wastewater treatment

plant and a small amount of oil-containing water separated by dewatering of slop waste is

another waste. Coagulation, neutralization, and flocculation processes are followed in the

treatment processes. The precipitants used in this process are toxic chemicals and are dangerous

for the environment and health necessitates working specifically on the subject. This study is

focused on oil removal from oil-containing wastewater, and natural flocculants are concentrated

as an alternative to Polyacrylamide (PAM), which is used as a chemical flocculant and has

positive results in the literature. The oil-containing waste sludge that precipitates after the

flocculation formed by the PAM chemical is buried in the soil in suitable areas if it is a mixture

with low fuel value or if there is no facility to dispose of it. However, the pollution left by

acrylamide in the soil and water after the burial process can exceed the life limit values in terms

of living biodiversity. Due to environmental awareness, Europe and America have decided to

disuse PAM as flocculation agent. The wastewater treatment process has processes that cannot

be easily changed. In this study, it was evaluated whether it is an alternative to PAM by

observing the results of studies with modified starch as a natural flocculant. The results obtained

with modified starch prepared at different pH values were compared with the results obtained

with PAM.