Sewage Treatment Plants

Maybe this is a form of privatization? If you're a city, make all the industrial, commercial, and residential facilities provide their own STPs? Better not have very high taxes, though.

No locale was specified, but it would be crucial to an appropriate answer....

This is not unusual for commercial and industrial facilities (particularly industrial). Pretty much no jurisdiction requires such for residential housing. The reason is due to the abrupt, dramatic change the discharges can cause at the treatment plant. It is not the discharges from the residential componet of the facilities they worry about, but rather potential large volume discharges coming from other ancillary portions of the facilities, which may not conform to the operational requirements of the treatment plant.

More information required (or maybe just clarification) relating to your terminology.

Does the facility treat and discharge the "wastewater" to the environment? (Or is it being discharged into the sewage system of the local authority?)

Most "large" facilities like factories, motels, hotels and food outlets have a "grease arrester" device that isolates some materials. Others like butchers and greengrocers will have "basket arresters" in the sinks to isolate the solids before they get into the sewer.

If you are talking of untreated effluent release to teh locat treatment plant, then they will be able to provide you with their "equivalent occupants" calculations for the site and they will have their own forecast values for BOD, COD etc from their own planning.

Good luck.

Thanks for the info. I asked them to consult with the local authority since they claim they test each facilities regularly and should have values for such installations, just for comparisson purposes.

The local water authorities are quoting what in the UK is called a "discharge consent". Material that is discharged within that consent is acceptable, and outside it is not. The fine mechanism is there to determine the value of any sewage treatment facilities needed.

What is needed is to determine the likely discharge figures from the aggregate of all the flows in the facility. If the blend is outside the consent limits then some form of treatment facility will be required, as will the local specialist advice needed to determine and select it.

At some point, we will need to learn OP's location.

Then, consult the discharge requirements for the specific jusisdiction as you suggest.

Without knowing the location, the challenge of trying to guess the requirements becomes a rather useless exercise.

Based on the number of people that will produce waste at the hotel and the amount of water that they will use one can estimate the concentration of BOD, COD, TOC, pH in the wastewater. For example typically every person produces 0.17 lbs of BOD perday and use about 100 gallons of water per day - in a hotel the water usage per person may be less. Localities just want to make sure that their treatment facilities will not be overloaded when a large entity will be discharging into their sewer system.

Based on the expected waste water generated, your civil plans should have allotted space/ area for effluent collection and treatment.

Best thing you can do is to collect water from similar capacity hotel industry/industries in the locality, give it for testing to water testing services laboratory for analysis.

Based on the technical date on water characteristics predicted ,your treatment plant design and process should be ascertained.

When you are able to post these details in the thread ,we can think of further steps based on your inputs.