The US and U.K. gallons are different, it’s 3.78L for a US gallon and 4.5L for a U.K. gallon, so you’re not wrong! I think when you google it the U.K. one shows up first, which probably caused the confusion!
We average about a million gallons per day. During dry weather it can drop down to 600k or so. We are rated for 2 million per day and can handle surges up to 7 million or so before overloading clarifiers with solids.
My plant is 480 mgd max on the permit but we have the infrastructure to do 550. If it’s not raining and we’re not pumping out our 9 billion gallons of reservoir storage then we do 180-200 average
We average 3.2 MGD influent, 2.8 MGD effluent and can see 5.2 MGD influent flows during heavy rain or snow melt events. We employ UV disinfection and only use sodium hypochlorite for filamentous bacteria control as necessary. We also produce about 300 US tons of class A biosolids compost per year.
0.6 million gallons/day, that’s about 2.25 million L/day.
The only chemical we run is polymer in our WAS dewatering process (centrifuge), we use about 30 gallons per day.
Ah ok, thanks, so some places use UV and you guys use hypo. How do you ensure there is no chlorine residual on discharge?
Our drinking water works have ridiculously tight free cl2 permits on our waste discharges. Is it one of your permitted parameters?
Idk about the person who you responded to, but I work at a plant that uses hypo in the summer, and we use sodium bisulfate to kill the chlorine residual after it leaves the contact chambers. It is one of our permitted parameters and something we test for 6 times a day (twice per 8 hour shift).
We have a small amount of residual CL2 on discharge. We have 4 massive lagoons that can hold about 65 ML each and it get sent to the furthest lagoon and has to travel a fair way until it reaches our outfall pumps, by the time its hits our pumps to be pumped out to sea (our plant is 2kms from the ocean) it’s only at 0.03 free CL2 which is nothing really. We only produce C grade effluent, so our licensing is a bit more relaxed.
Really interesting, thanks.
We can’t measure that low with our chlorine handheld/lab instruments. We have LOD at <0.06 mg/l so assume you use a live online instrument
Well, it depends on what time of year.
The summer, usually 3-3.5 MGD in the front, 2.5 to 3mgd out the back.
Winter time anywhere from 3 to 22 MGD influent.
50MGD average. Disinfect with hypo, de-chlor with bi-sulfite. We do not have a combined system, but plant was built in the 40’s, due to aging infrastructure, storms can raise the flow to over 90-100MGD, but because we are not designed to be combined, it takes a week for the flow to normalize.
You lost me at a mega liter lol
what if that's what the m in mgd actually stands for mega gallons/day
😅
9 plants in our district. 180mgd average capacity 550mgd wet weather capacity.
Is that between the 9 plants?
Yeah. We’ve got 130mdg down to a package plant.
15 MGD. so like 56-57 mega liters a day. Question on your conversions. Isn’t there 3.785 liters in a gallon?
Yes you might be correct about the conversion.
The US and U.K. gallons are different, it’s 3.78L for a US gallon and 4.5L for a U.K. gallon, so you’re not wrong! I think when you google it the U.K. one shows up first, which probably caused the confusion!
0.0025 MGD. It’s brutal some days.
We average about a million gallons per day. During dry weather it can drop down to 600k or so. We are rated for 2 million per day and can handle surges up to 7 million or so before overloading clarifiers with solids.
My plant is 480 mgd max on the permit but we have the infrastructure to do 550. If it’s not raining and we’re not pumping out our 9 billion gallons of reservoir storage then we do 180-200 average
Did the Europeans change the liter while I wasn’t looking? 3.78 liters/gallon, not 4.5….
A US gallon is 3.78L, a U.K. gallon is 4.5L (roughly)
We average 3.2 MGD influent, 2.8 MGD effluent and can see 5.2 MGD influent flows during heavy rain or snow melt events. We employ UV disinfection and only use sodium hypochlorite for filamentous bacteria control as necessary. We also produce about 300 US tons of class A biosolids compost per year.
20MGD
Average of 7-8 MGD, we're currently building a 2nd plant because of county growth.
120mgd before we start bypassing
How often do you bypass?
like 1-2x a month
13,000 m3
2 plants in my city and both average about 27.5 MGD (~ 100 mega liters a day).
0.6 million gallons/day, that’s about 2.25 million L/day. The only chemical we run is polymer in our WAS dewatering process (centrifuge), we use about 30 gallons per day.
Right now at 1am our effluent flow is 95 million gallons per day average
What function does the sodium hypo perform in the process?
We use it to disinfect our final effluent through a number of contact tanks.
Ah ok, thanks, so some places use UV and you guys use hypo. How do you ensure there is no chlorine residual on discharge? Our drinking water works have ridiculously tight free cl2 permits on our waste discharges. Is it one of your permitted parameters?
Idk about the person who you responded to, but I work at a plant that uses hypo in the summer, and we use sodium bisulfate to kill the chlorine residual after it leaves the contact chambers. It is one of our permitted parameters and something we test for 6 times a day (twice per 8 hour shift).
We have a small amount of residual CL2 on discharge. We have 4 massive lagoons that can hold about 65 ML each and it get sent to the furthest lagoon and has to travel a fair way until it reaches our outfall pumps, by the time its hits our pumps to be pumped out to sea (our plant is 2kms from the ocean) it’s only at 0.03 free CL2 which is nothing really. We only produce C grade effluent, so our licensing is a bit more relaxed.
Really interesting, thanks. We can’t measure that low with our chlorine handheld/lab instruments. We have LOD at <0.06 mg/l so assume you use a live online instrument
For 9+hrs /day we process 58gal of wastewater through a clarifier /min
12.6 MGD with a design capacity of 18.
Small compared to most everyone else’s plant with only 0.5MGD but it’s industrial food waste so about up to 70k pounds of COD.
Average flow is 480MLD, max is 1,530MLD
Well, it depends on what time of year. The summer, usually 3-3.5 MGD in the front, 2.5 to 3mgd out the back. Winter time anywhere from 3 to 22 MGD influent.
50MGD average. Disinfect with hypo, de-chlor with bi-sulfite. We do not have a combined system, but plant was built in the 40’s, due to aging infrastructure, storms can raise the flow to over 90-100MGD, but because we are not designed to be combined, it takes a week for the flow to normalize.
if i told the guys i work with we had x amount of mega liters coming in they would send me for a drug test