MyCelx Stormwater Runoff Treatment Unit Deployed At Honda Facility

The Background

The Honda plant has four acres under roof, a three acre parking lot, refueling station, plus oil and chemical delivery and storage areas.

The Problem

Stormwater runoff and process water effluent from this plant enter an environmentally sensitive major tributary. The stormwater is collected in a large underground concrete vault and then gradually released by co-mingling with the plant process water before treatment and discharge. The hydrocarbons contained in the stormwater were putting an excessive load on the plant treatment system making it difficult to discharge the stormwater while maintaining plant discharge standards. Biological activity in the stormwater vault was very evident from the odor in the treatment plant, adding to the effluent BOD.

The Solution

EMRP was requested to design an economical system for removing the hydrocarbons from the stormwater before it reached the plant treatment system. A stainless steel, baffled box was built to allow the water to be pre-filtered with six cubic feet of PermaKleen.

The pre-filter was followed by a 5 micron particulate filter and an MX-4 with HRM cartridges for final polish before transfer to the treatment plant.

The Results

The successful removal of the hydrocarbons from the stormwater was evidenced by elimination of the odor at the treatment plant. The reduced load on the plant now allows the stormwater to be pumped and discharged on a regular basis without overloading the treatment system.
The underground vault is pumped out 2 or 3 times per year for an average annual volume of 1,500,000 gallons. The filter media is changed out after each cycle.