Wastewater Treatment with High Organic Load

I am a member of a team working on the NoBi (Bidirectional Nodes) program sponsored by Conacyt (National Council of Science and Technology) Mexico and by the NSF (National Science Foundation). Our team is aiming to determine the needs and requirements regarding the treatment of wastewater with high organic load, generated in the production centers of food, meat, poultry, etc. How can we know which treatment solution exactly to apply? How does the treatment change as the organic load changes?