ESCO INTERNATIONAL; a company specialising in Advanced Oxidation Processes, Ozone and UV systems and with the primary objective of resolving water pollution issues on a global scale, worked on a semi-pilot scale project with an internationally well-known company in the chemical & polymers production industry, based in US.

Organic compounds of concern include BI, MI, BPA, HEG and NPI compounds, known as recalcitrant compounds but not bio-toxic. These organics are signature compounds from manufacturing process contained in wastewater and can be present in the effluent following Bio-treatment.

Semi-pilot AOP trials were conducted to investigate the feasibility to destroy “signature organic compounds” to meet customer requirements.  Treated samples were sent back to customer for HPLC analysis.

TOC analysis was performed by an external laboratory using UV/Persulfate TOC method.

AOP test results showed total removal of colour and signature compounds as illustrated in the figures below.

In addition, TOC reduction of more than 95% was achieved, starting with initial TOC range of 130 – 515 ppmC down to less than 3ppm. The AOP process proved very efficient in total oxidative destruction of the signature organics as well as a significant TOC reduction.

This project demonstrates ESCO’s main focus of providing companies with state-of-the-art sustainable and cost effective water treatment solutions suited to their specific needs.

Fig. Signature compounds before and after AOP pilot unit.

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