请问supernatant and effluent到底是什么??原句是:All items on the quality of the influent, supernatant and effluent, together with the mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) were measured according to the standard methods
原句是:All items on the quality of the influent, supernatant and effluent, together with the mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) were measured according to the standard methods
