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Home Turkish Maritime News Treatment facilities in Kocaeli prevent the pollution of the Gulf of Izmit

Treatment facilities in Kocaeli prevent the pollution of the Gulf of Izmit

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At 23 wastewater treatment plants, 6 of which are advanced biological, in Kocaeli, approximately 435 thousand cubic meters of wastewater is treated per day, preventing it from flowing into the Gulf of Izmit. 10% of the treated water is sent to factories for reuse.

23 waste wall treatment plants, 6 of which are advanced biological and 4 of which are biological, established by Kocaeli Metropolitan Municipality in Kocaeli prevent the pollution of the Gulf of Izmit.

At the facilities operating 24 hours a day, approximately 435 thousand cubic meters of water is purified and separated from harmful nitrogen, phosphorus and sludge. 10% of the treated water is sent to the factories in the city for reuse.

The change in the treated water with the studies carried out in the treatment plants draws attention. In the two sludge incineration plants within the treatment facilities, 190 thousand tons of sludge for rosettes is disposed of, preventing it from polluting the environment and the seas. Electricity is generated from the discarded sludge.

In addition, electricity is obtained from thousands of solar energy panels placed over the ventilation pools at Başiskele Kullar Advanced Biological Wastewater Treatment Plant in the Başiskele district of Kocaeli. Electricity generated from sludge burning and solar panels meets some of the facility’s electricity needs.


Providing information about advanced biological treatment plants and wastewater treatment plants, Kullar Advanced Biological Wastewater Treatment Plant Control Engineer Gülser Korkmaz said, “We have 23 water treatment plants affiliated to the General Directorate of ISU within the Kocaeli Metropolitan Municipality. We have 6 advanced biological treatment plants, 4 biological wastewater treatment plants, the others modular wastewater treatment plants and 1 natural wastewater treatment plant. 6 of them are advanced biological treatment plants as we said. We are currently at Kullar Wastewater Treatment Plant. Kocaeli’s largest wastewater treatment plant. It has been serving as an advanced biological treatment plant since 2018. This place works with a daily capacity of 142 thousand cubic meters, in rainy weather we can increase this capacity up to 162 thousand cubic meters. We pass the pre-treated water through aeration pools where nitrogen and phosphorus removal is carried out. Then, the sludge is allowed to settle at the bottom by keeping it in the final settling pools. The water on the surface is discharged as clear. The sludge at the bottom is converted from liquid to solid and disposed of. There is also a recycling unit in our facility, and it has a daily capacity of 17 thousand cubic meters. Here, the water is further disinfected by applying the second processes. This water is sold to industrial establishments for use,” he said.


Drawing attention to the importance of treatment plants, Gülser Korkmaz said, “If we did not have these facilities, all of the daily wastewater would be discharged into the sea without any treatment. The nitrogen and phosphorus charge would reach the sea as it was. So it would be a pretty bad situation. Thanks to these facilities, we dispose of 315 tons of sludge daily to Kocaeli. This much mud is prevented from going into the sea. This is an important operation for the seas. In the wastewater generated in the houses, naturally, there is a lot of phosphorus-containing wastewater due to detergents and similar reasons. At the same time, the nitrogen load of the wastewater in the sewers is high. Nitrogen removal is available in all 23 wastewater plants. We provide a discharge below the discharge limits of the Ministry of Environment and Urbanization. We are eliminating nitrogen at a rate of 100 percent and phosphorus at a rate of 65 percent at the facilities in Kocaeli,” he said.



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