Does he mean the DR9 pipe wall will interfere with the rotation of the valve disc? I believe there are HDPE valve spacers made specifically to prevent this.
"My understanding is that PWWF is for an hour in the morning and evening," I think you are referring to Peak Hourly Flow. Functionally, your definition is probably close enough.
Peak wet weather flow (PWWF) is a function of the leakiness of the collection system and the characteristics of the...
Very helpful. I don't think I will need all of these tests given the nature of the waste stream, but a great place to start.
With respect to the BOD test, I want to quantify how much of the TDS is dissolved ionized solids that are difficult to treat, versus how much is dissolved sugar, etc...
I’m working on a loading analysis to quantify and likely characterize Total Dissolved Solids in a food manufacturer’s waste stream. The food manufacturer will need to pretreat to a local limit for BOD (easy part) and potentially TDS (hard part) before the local municipality will accept sewage...
I'm working on a WWTP's anaerobic digesters originally constructed in the 1960's. The digester tanks have cast iron (CI) pipe with several CI bell end wall castings penetrating the tank walls (photo attached). The bell end/CI plain end joints are made up with oakum/jute and caulked lead (photos...
Hello All,
I'm looking for advice in modeling minor losses through closed conduit junctions (manholes) in HydroCAD. I have ponds with storage draining to a storm sewer system. Each junction in the storm sewer system is modeled as a catch basin zero-storage pond. My understanding is the peak...
