Adding Groundwater to SBR

[dhot]

I have an SBR system and the county wants to add groundwater from an old oil refinary. The water doesn't have any thing that will harm the process as far as chemicals. It's basicly plain water. DEP will not let me bypass the SBR's. How will this effect the treatment? I know the concentration will be smaller. The pounds of BOD will be the same. I don't want to kill my plant.

 

[semo]

Depending on the quantity of water, it can harm your effluent by lowering your F:M ratio and MLSS.

A lot of SBR's are designed for peak wet weather flows considerably greater than average however, and it might not be an issue. You need to look at the design conditions of your facility and your current average flow conditions.

If you are not near capacity at your facility, you "might" accept the water under conditions (ie limit flow, limit timing of release, etc.). You don't want the excess water during storm events when you already get peak flows.

I would be very concerned about what they are going to give you. Make sure you have testing performed routinely on the water.

Why is this water bad that it can't be discharge directly. Are their VOC's in the water? Are they filtering the water. Can they filter the water themselves then discharge it directly?

I'd have a lot of questions before accepting what I can't give back. If you discharge something bad, it is your butt in the sling. You accepted it and then you discharged it.

Be careful.

 

[dhot]

It is being run through Carbon filters now and then releaised. The company want to do away with their discharge permit and Carbon plant. The untreated water is going to be reliesed from a 1 MGD tank during low flows and will be diluted in the tank if it gets a peak of chemicals that may be harm full. The water that is being recieved is a small amount maybe 2000 gpd into the 1 MGD tank.

 

[bimr]

If you are adding an insignificant amount of clean water (5-10% of flow) to the wastewater treatment influent, then you have nothing to worry about.

The permit issues may be complicated since the refinery wastewater may be permitted under rcra and your plant wastewater system is not.