Wastewater Treatment Process Control Testing

[@Lucchese18]

Its always interesting to see how other wastewater plants handle their process control testing

[@daniellethewatertrainer]

At 4:15 you say your are calculating your mixed liquor suspended solids number. The test you demonstrated was for total solids (SM-2540 B). You would have to filter your sample and weigh your dried filter paper residue to get the suspended solids number (SM-2540 D).

[@AthensWWTP]

Good point! Thanks for the correction. In fact, I got more than that wrong. MLSS would require a lot more information to calculate , aeration tank volume etc. The drying method was for total solids. Thanks for watching!!

[@ahmadshawaf5704]

Hello .. Thank you very much. I want to know if there is a way to determine the amount of phosphorous in the secondary sludge produced by biological treatment

[@davidmercer3043]

very well done and narrated

[@walterhiggins9123]

Good job on the video!

[@jijingihemenemmanuel4464]

Can this be monitored on computer connected to the process?

[@burtrussel1535]

Yes, you can use an inline TSS probe in the aeration basin. Being able to have constant monitoring feed of the basin TSS is the way to go because you can see deviations in a trend. If the mlss is slowly dropping, you likely have an equipment failure of RAS pumps, or mixers... Your solids are selling somewhere. Or your losing a ton of solids in the effluent... I prefer to have inline tss probes and run mlss daily.

[@feedyourfaith7392]

I have a question do you know why DO is not part of the wastewater permit but the pH is on the final effluent

[@AthensWWTP]

Is DO not on your DMR to report? Our permit states we have to meet a specific mg/l of DO as well as pH.

[@feedyourfaith7392]

Athens WWTP No the DO is not on our permit, I was wondering we have TSS, CBod, BoD, and NH3

[@AthensWWTP]

Feed Your Faith That is a little strange. During the re-permitting process, sometimes the DEP will add/subtract things to test for. But DO, in my experience, has always remained. And it’s important to aquatic life that the DO is enough for you receiving stream.

[@ecafsinep]

this is great. my plant is just now building it's own laboratory and i'm preparing to do our own testing, starting with solids testing. i don't have my stantard methods book in front of me, but doesn't it state for MLSS you simply follow TSS procedure, which is drying for an hour, then add on the muffle furnace procedure?

[@ecafsinep]

also, with your sludge settling that low, what are your MLSS typically ranging?

[@AthensWWTP]

ecafsinep thank you for your comments. There are many different ways to dry solids. We do it this way because it's simple and we don't have to mess with crucibles or filter paper. Another words, less time in the lab so we can attend to other duties. The down side is the 8 hours it takes to dry the solids. Our mlss changes pretty often due to our location being in a college town and the weather changes. Right now with college out and very warm weather, we are running around 1700. Normally lower, but we are only running one basin right now due to cleaning.

[@ecafsinep]

hey, thanks for replying! so you can still run MLSS through vacuum flask/funnel and filter? if so, wouldn't the furnace ignite the filter?

[@feedyourfaith7392]

What does the Volatile tell you. The last sample in the oven at temp of 550

[@Kalryuabides]

There are solids that will burn off, and there are solids that will not (metals and the like) the difference in VSS and nVSS gives you an understanding of your organic solid load.

[@feedyourfaith7392]

So is it better to use the sludge judge to pull the MLss

[@AthensWWTP]

Wilson Wilson I wouldn’t say it was better...only convenient for us as the sludge judge is always readily available. The sample is homogeneous so either way it will work.

[@feedyourfaith7392]

If the pH is under 5 going out the effluent why is it a problem? If it’s over 10 why is that a problem?

[@AthensWWTP]

A lot to explain there. You may want to read up on that. PH is very important not just in the effluent back into the receiving stream, but also the treatment process. Microorganisms like a certain pH range to do their job properly.

[@stormcld]

It’s so much easier to use glass fiber filters much quicker to get results that day

[@AthensWWTP]

Canuky Alwert Absolutely..your right! There is always better and quicker ways of doing things. This is just the method we stuck with over the years. We do not need instant results, and we can continue doing other things around the plant while we wait. And no more buying filters hahaha. Thanks for the comment.

[@thanh8189]

pls I don't know what the tool do you use to take the water sample?

[@AthensWWTP]

PHAN THÀNH it’s called a core sampler. Or commonly called a “sludge judge”.

[@TurtleboyTom]

Why use a sludge judge? The aerated sample is homogeneous. A scoop should do the trick.

[@AthensWWTP]

TurtleboyTom thanks for the comment. Your right. A scoop would work and we have used those also. The sludge judge is always located nearby so we just use that. We use this also to check sludge depth in the opposite basin. One tool instead of two.

[@TurtleboyTom]

I figured it was for convenience. Thanks for the reply!

[@Kalryuabides]

@@AthensWWTP Sorry to give you this 2 years late, but try and use the scoop and not the sludge judge. Your mixed liquor should not include the blanket that will have formed on the bottom. It will give you a false reading, saying your MLSS is higher than it actually is. Just my two cents.

[@ronnieperez8519]

@@AthensWWTP I had no idea that tool was called a sludge judge lol. I started my job at a wwtp and I've used that same tool to check the sludge blanket in our secondary clarifiers

[@feedyourfaith7392]

What is your Alk on your FE

[@AthensWWTP]

Wilson Wilson We do not have to report alkalinity, so we don’t have any hard lab samples. But...using the test strips we have, we average around 80-100 ppm if I remember correctly.

[@feedyourfaith7392]

What does the settlometer tell you

[@AthensWWTP]

Margaret Wilson thank you for the question. The settleometer test shows us visually what's going on in our activated sludge process. We look at it like, is it settling too fast,too slow? Is it compacting well? Is there a lot of suspended solids on top of the blanket? Just things like this the assist us in running the plant.

[@feedyourfaith7392]

Can you tell me what does the centrifuge tell you about the sludge?

[@AthensWWTP]

Margaret Wilson we don't generally use a centrifuge much. It gives you a percent volume of sludge. We find it doesn't really help us much.

[@ኢትኤል-ወ5ቘ]

please send wastewater treatement procudure manual help me

[@AthensWWTP]

tekle betre You can look for the Sacramento manuals. They will help a lot.

[@naturalworld247]

Hello sir