the most appropriate technology will depend on the type of substance you want to treat (PHA - polyciclic aromatic hydrocarbons, or Phytohaemagglutinin, Polyhydroxyalkanoate, Polyhydroxyaldehyde, etc). I suggest reading these articles to find the possibilities of treatment of PHA by biological pathway and emerging technologies
Masi, F., Lepri, L. , Del Bubba, M., Sacco, C., Lo Nostro, A., Comodo, N. Organic chemical and Microbial facies of liquid aerosols from a wastewater treatment plant. Annali di Chimica, Volume 89, Issue 3-4, March 1999, Pages 231-248
Parag R.Gogate*, Aniruddha B.Pandit. A review of imperative technologies for wastewater treatment I: oxidation technologies at ambient conditions. Advances in Environmental Research 8 (2004) 501–551
Best Regards
Article A review of imperative technologies for wastewater treatment...
I hope you might be reading about those suggested article. You might have got to know about an organism Sphingobium indicum having linA and linB genes targetting PAHs.
Here is the list of article of a scientist working in the area: