Odors from deep well - open to atmosphere
Odors from deep well - open to atmosphere
(OP)
Hi,
I have a perpetual problem regarding malodorous emmisions from a deep well pumping station that is situated in the middle of town and open to atmosphere.
It receives sewage from tankers emptying septic waste and long gravity flow sewer mains that have been known to go a bit septic in the summer months.
The sewage undertaker is proposing a surfactant misting system to remove the odor load, but I don't have any testimonials other than the company's spiel.
will the system be effective cosidering that the sewage odors are freely dispersed to atmosphere?
Any experience with these systems shared gladly received!!
I have a perpetual problem regarding malodorous emmisions from a deep well pumping station that is situated in the middle of town and open to atmosphere.
It receives sewage from tankers emptying septic waste and long gravity flow sewer mains that have been known to go a bit septic in the summer months.
The sewage undertaker is proposing a surfactant misting system to remove the odor load, but I don't have any testimonials other than the company's spiel.
will the system be effective cosidering that the sewage odors are freely dispersed to atmosphere?
Any experience with these systems shared gladly received!!





RE: Odors from deep well - open to atmosphere
This reduced the odours significantly along the first few manholes downstream of the lift station and reduced the complaints of the local businesses and residents. The haulers complained about thier extra costs, but in the end, accepted the change.
KRS Services
www.krs-services.com
RE: Odors from deep well - open to atmosphere
The main consideration in treating sewage odours effectively is to collect the air effectively and send it for treatment to suitable technologies such as BioFilters or Activated Carbon, so that diffuse odour leakage risk is minimised.
You need to calculate the amount of air to be displaced from the well and also look at inflow sewage rate (L/s) and extract this amount of air.
Contact Clean TeQ in Melbourne, Australia for further details.
ctairman
info@cleanteq.com
RE: Odors from deep well - open to atmosphere
Todd
toddforet@usa.net
RE: Odors from deep well - open to atmosphere
For this application BioFilters have the best absorption & oxidation capability given a larger airflow with low odour concentrations.
Educt vents are a good idea to concentrate the air that is sent to an odour treatment plant.
Using air only could be a good idea if you are allowed to dilute the air and have a large buffer zone by the regulatory authorities. From experience I would have to say this is kind of frowned upon!!!
Be careful, Often what happens is that you will dilute the air being dispersed to atmosphere via a stack but you might actually increase the problem if you have low threshold odours like organic sulphides that disperse over a wider area!!!
Hope this helps.
ctairman
RE: Odors from deep well - open to atmosphere
RE: Odors from deep well - open to atmosphere
this may be a basic suggestion, but have you considered carbon filters placed near or over the outlet?
RE: Odors from deep well - open to atmosphere
Could you explain as to whether there is an existing air extraction system to remove odours from the well?
(If you are getting complaints I suspect there isn't)
You need to move enough air to treat the volume displaced when the tankers drop the waste, and then some to make sure all the air is collected.
Subsequently odour control measures such as BioFilters and Activated Carbon could be utilised to treat this air.
However I understand the $ involved, but inevitably it will be the only way of stopping complaints.
ctairman
RE: Odors from deep well - open to atmosphere
RE: Odors from deep well - open to atmosphere
If this is happening, there may be a reason for the owner to want to fix the problem. There are things that can be done to tackle this problem; however, they typically are not cheap.
RE: Odors from deep well - open to atmosphere
RE: Odors from deep well - open to atmosphere
RE: Odors from deep well - open to atmosphere
a. Treat the off-gas at the pumping/receiving station with ozone applied to vent stack. Simple ozone monitor adjusts the ozone level. This will oxodize H2S and other odors. No scrubbers, no large filters, etc.
b. Add a solution of enzymes and carbon lignite to the wastewater as it flows from the reciving station. Dosage rate for lignite is usually 1-gallon per 500,000 gallons. Gallons cost $60 retail. Enzymes - about the same/ and dose the same. This will remove the odor, remove the "septic" of the sewage lines, and the sewage plant won't mind receiving any "unused" lignite or enzymes, as it will increase/speed their microbial processes. The parties dumping will be charged $100 or so more per 500,000 gallons (plus whatever you need for ozone captiol recovery - figure ozone system tohandle off-gas at about $100,000 retail). Simply, fast and elegant!
Dave/ECP International
RE: Odors from deep well - open to atmosphere