COD Polishing for Sinopec Jinling Petrochemical

Industry

Petrochemical

Equipment Capacity/Flow Rate

60 m³/h

Compounds of Concern

Recalcitrant COD

Influent Concentration

150mg/L

Treatment Targets

Reduce COD by 15mg/L

Unit Energy Consumption

1.5 kwh/m³

Industry

Petrochemical

Equipment Capacity/Flow Rate

60 m³/h

Compounds of Concern

Recalcitrant COD

Influent Concentration

150mg/L

Treatment Targets

Reduce COD by 15mg/L

Unit Energy Consumption

1.5 kwh/m³

Background: COD Reduction Project

China Petroleum & Chemical Corporation (SinoPec) approached one of our EPC partners in China, Nanjing Balance about one of their subsidiaries, Jinling Petro. Jinling Petro is a petrochemical facility located in Nanjing City, China.

Jinling Petro needed to reduce their COD following their existing wastewater treatment plant. The target was to reduce COD by the relatively small amount required to meet the stricter China surface water COD requirement.

Fraser Morgan

Wastewater consultant

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Objective: COD Polishing

Janling Petro already had treatment processes to reduce COD but there was a residual amount left in the effluent which was too much to discharge to sewer. They needed our system to reduce the COD by a small amount so it could be discharged.

They had a flow rate of 60 m³/h and an influent concentration of 150 mg/L COD. The treatment target was to reduce the COD by 15mg/L so they could safely discharge the effluent.

What’s it like to work with Arvia?

“Our experience with Arvia so far has been really great. I believe there is really interest to make this into a success and the communication on this project is very good and clear.”

Chemical Engineer, Netherlands

SOLUTION: Nyex-a was chosen above Ozone AOP and Fentons

The engineering company Nanjing Balance compared our Nyex technology with Ozone AOP and Fentons in extensive studies.

The Nyex technology was chosen because of its advantages in OpEx costs and due to the fact that the technology generates no sludge to dispose of.

Working with Nanjing Balance, we proposed our Nyex-a water treatment process along with a new BAF and high-density sedimentation tank, would be installed after their existing wastewater treatment plant.

Construction of their new water treatment plant began.

Full Scale COD Polishing Water Treatment Process

We manufactured and delivered a 96-off 7-100 Nyex-a modular system to this full-scale project in Q2 2020. The commissioning was completed in Dec 2020.

Nyex-a is a combination of adsorption and electrochemical oxidation. The contaminant is adsorbed onto our patented Nyex media and then a low electric current is passed through the media which oxidises the adsorbed chemicals.

During this process no solid by-products (sludge) are produced, which means there is greatly reduced OpEx due to lack of incineration.

In addition, the Nyex media is continually regenerated during operation, which means there is very high up-time. A 2% annual top up of Nyex media is all that is required.

Free industrial wastewater consultation

Tell us what organic compounds you need to remove from your water and our consultants will give their recommended approach which might involve:

Engineering assessment of your water profile
Treatability trial to scope the pilot
Optioneering to determine best solution

Results: Low OpEx and no sludge

One of the reasons why Janling Petro are pleased with the result because the OpEx is very favourable. Direct 380V AC power is being used to feed to our full-scale system. It takes 1.5 kwh/m3 unit energy consumption to remove 15 mg/L of COD.

The other very important factor is that Nyex does not produce any sludge. Janling Petro are able to reduce their impact on the environment by using Nyex water treatment process.