Ozone Assisted Aerobic Lysis for Accelerated Biosolids Destruction & EDCs Removal
Consortium partners to be made public at a later date.
WHAT ARE WE PLANNING TO DO?
We are planning to conduct a full-scale demonstration, validation of the bench-scale performance results of patented “ozone assisted aerobic sludge digestion process”. We’ll produce a final product, “Class A” category biosolids with at least 6-log removal of pathogens and 95% removal of Endocrine Disruptor Compounds (EDCs); without causing any harmful chemical residue in final product, which can be safely used as fertilizer; while also achieving at least 25% energy savings with respect to conventional aerobic digestion.
Biological wastewater treatment generates organic residuals called “biosolids”, which contain essential nutrients that, when properly treated, can be applied as fertilizer to farmland. However, only 37% of treated biosolids currently go to farmlands in the EU, due to insufficient or no treatment at all. We’d like to properly treat and convert this wasted resource into a sanitized, nutrient-rich, bio-fertilizer product that replaces synthetic chemical fertilizers.
Another reason is incidents like the following: Antidepressants found in fish brains in Great Lakes region https://esemag.com/
There are municipalities who have already adopted premium biosolids treatment processes and achieving high quality
biosolids; however, numbers are limited to only a handful. For example: DC Water (Washington, DC, USA) has a biofertilizer product (anaerobically treated) which is sold to the public at approx. 7.5
$US/cubic yard (i.e. 9.8 $US/m3 or 12 $CAD/m3) and they are planning to bag and sell the product in small quantities.
( Ref: Chris Peot, Director of Resources Recovery, 2017-September https://www.dcwater.com/
WHAT IS THE PROJECT GOAL?
To demonstrate, in full scale, the feasibility and performance of the patented ozone-assisted aerobic-digestion process at University laboratory. The full-scale operating data will validate the bench-scale performance results. Successful scale-up will provide conclusive proof to potential customers that the technology will create a sanitized, nutrient-rich, bio-fertilizer product with a competitive commercial value to replace synthetic chemical fertilizers.
Returning biosolids to farmland completes a natural food-cycle: farm’s produce is consumed by humans who then produce waste, which, when treated appropriately, is returned back to the farms to offset input costs and deliver remarkable yield results. In this way, nutrients such as nitrogen and phosphorus are returned farms for use in crop production, sod farming, soil remediation, horticulture, and more.
The main results for the project are as follows:
 . . reduce biosolids volume by 70% (in comparison to conventional 40%)
 . . kill pathogens to at least 6-log removal, providing a sanitized, stabilized final product;
 . . produce “Class A” quality biosolids (according to US EPA biosolids categorization) which has a commercial value for agricultural use.
 . . remove up to 99% Endocrine Disruptor Chemicals (EDCs) as well as Polycyclic Aromatic Hydrocarbons (PAHs);
 . . achieve these results in as low as 4 days retention time, in comparison to minimum 15 days with conventional aerobic digestion;
 . . achieve these results while using at least 25% less energy than conventional aerobic digestion.