Hello Phetla, thanks for clarifying. If you are just doing screen removal, no you won't have good effluent from wastewater. The screening will only remove some of the larger trash, and very little of the human waste, which contains the vast majority of the pathogens that cause illness. The next step after screening would be to separate what we call suspended solids, which will either settle or float (will need bottom and surface removal of sludge and scum from the water). That will be an improvement and requires a tank with large enough volume to slow down the incoming flow velocity. There are many ways of removing the floatables and settleables. Some have high cost and require less manpower, or you can have very simple and cheap solutions that require more ongoing manpower. This will improve your effluent quality significantly, but does not remove anything that is dissolved. So if you end sedimentation tanks and then downstream disinfection, you will vastly improve the effluent quality (compared to just screening).

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Hello Phetla, thanks for clarifying. If you are just doing screen removal, no you won't have good effluent from wastewater. The screening will only remove some of the larger trash, and very little of the human waste, which contains the vast majority of the pathogens that cause illness. The next step after screening would be to separate what we call suspended solids, which will either settle or float (will need bottom and surface removal of sludge and scum from the water). That will be an improvement and requires a tank with large enough volume to slow down the incoming flow velocity. There are many ways of removing the floatables and settleables. Some have high cost and require less manpower, or you can have very simple and cheap solutions that require more ongoing manpower. This will improve your effluent quality significantly, but does not remove anything that is dissolved. So if you end sedimentation tanks and then downstream disinfection, you will vastly improve the effluent quality (compared to just screening).