Hi everybody!
I am designing a 1000 PE WWTP for a Sea Resort. I assumed extended aeration process and volumetric loading of 0.25 kgBOD/m3.d and got the needed volume of aeration basin of 240 m3.
My question is: What is the minimal volumetric loading or F/M ratio necessary for the process to...
Hi everybody!
I have a task to start a trial period for an industrial WWTP. It is rather simple, rotary drum sieve, equalisation tank with a neutralisation equipment (HCl and CO2 as acid, and NaOH as a base) and that's it. The desired level of pH is 6-9. And the plant is automatic
Concerning...
Hi everybody.
Water quality sampling is to be done for 7 wells. The problem is that these wells are currently out of service and they have been out of service for almost a year, but the authorities want to put them back to work and they need to check for the quality of the water.
The question...
Hi everybody, I have to ask for help, once again.
I have to design a process for H2S removal in a break-pressure chamber that is part of a water supply system. I've attached a cross-section of a chamber, with all the pipelines, for you to get a picture of it.
The problem is: the only thing I...
I recently found out about this relatively new process for nitrogen removal - Deammonification and I got really interested. There are lots of papers about the process over the internet, but I couldn't find any information about the design parameters and recommendations, calculations for reactor...
Hi everybody!
I am looking for an answer on how to determine the amount of chemical (HCl, NaOH) needed for bringing the pH in the 6.5-9.5 value? So, to simplify the question, here is the example:
I have a wastewater with a pH=11 (30 m3 batch). How much HCl (30%) do I need to add to the...
Hi, its me again! :) I have a question regarding the design of flow makers in oxidation ditch.
I have an oxi ditch, 5,5 m deep, 2300 m3 volume, with disc air diffusers and flow makers, but I am not sure how to pick the right flow maker.
I guess the easiest way is to ask the manufacturer to...
Hi everybody. This question might seem stupid, but I just can't figure it out.
I am participating in a design of a municipal WWTP. We have two secondary clarifiers and one sludge pumping station with submersible pumps, for the sludge from the clarifiers. The sludge flows by hydrostatic pressure...
Need your help guys again!
I am supposed to prepare preliminary design for treating municipal wastewater for two neighboring villages. The issue is that there is a large difference in population throughout the year, due to the tourist season (summer). The first village has 350 permanent...
I am a young Process/Environmental Engineer, recently started working for a company that designs, builds and commissions WWTPs. Here is the info :
On one of the WWTPs we built, there is a problem with sludge. WWTP is processing wastewater from pharmaceutical industry and it consists of...
