Dow chemical Spain carried out the research on the difficult wastewater to help the sustainable development of the petrochemical industry

Recently, the dow water treatment and process solutions division, said the modern-day tarragona petroleum chemical plant in Spain to carry out the pilot study has met some challenges, and one of the biggest challenges is the petrochemical plant emissions of sewage mixed three different kinds of wastewater, including the middle flow, flow and process flow.

SDPLAZA previously reported, the pilot test in dow group located in ethylene cracking unit to Spain nastic, test time is on June 6, 2017 to December 2019, test equipment including physical and chemical pretreatment, moving bed biofilm reactor, ultrafiltration, reverse osmosis and ion exchange resin, etc. The whole process of water treatment systems.

Pictured: dow's water recovery and oil chemical plant's RO system in tarragona, Spain

At present, the company has conducted preliminary research on different types of wastewater to ensure the optimal design of the system. The study included biological parameters, electrical conductivity, total suspension solids (TSS) and anion and cationic relationship parameters. The goal of the research is to design a can deal with these three kinds of wastewater sewage system, and the water again after processing used in the ethylene cracking device, it will be this three kinds of mixed waste water after processing the first application in the field of industrial reuse.

Because these three types of wastewater are very different, it poses a challenge to the design of the system. The intermediate flow is mainly from cooling water and equipment cleaning wastewater, the highest conductivity and lowest organic carbon and toxic compounds. The process flow of water and petroleum hydrocarbon is the most complex, including bigoted organic compound, organic nitrogen and iron. In the context of dissolved solids and organic carbon content, oil flow between the middle flow and process flow, the water comes mainly from cracking and octylene plant the groove system, and contains volatile aromatic hydrocarbon such as naphthalene and styrene.

It is understood that the European petrochemical industry produces about 1.75 billion cubic meters of wastewater a year, making it the continent's most water-thirsty industry. Through the analysis and design of wastewater facilities will help related enterprises to provide fresh water for municipal engineering and other users, at the same time also will promote petrochemical industry to achieve sustainable development.