| 摘要 |
#CMT# #/CMT# An effluent treatment unit, with a decantation compartment upstream of a filtration compartment, comprises a tank formed by assembling annular modules (1a - 1f); end closure elements (3, 4) having respective inlet and outlet openings (31, 41); and at least one intermediate separating wall (51) forming the decantation compartment (C1) and filtration compartment (C'2, C''2). #CMT#USE : #/CMT# The unit is specifically used for treating rainwater from an overflow tank (claimed). In particular decantation of sludge, separation of hydrocarbon contaminants and filtration on a substrate are carried out. #CMT#ADVANTAGE : #/CMT# The treatment unit has a simple construction, and is easy and inexpensive to install. The annular module arrangement allows the volume of each compartment of the tank to be adapted easily to the amount and type of effluent to be treated. The effluents can be pass through the unit by gravity, without the need for a pumping system. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The figure shows a schematic diagram of the principles of one form of the effluent treatment plant. 1a - 1f : Annular modular elements 3, 4 : First and second vertical walls 6 : Lamellar decantation system 6a, 6b, 6c : Modular lamellar blocks 31 : Inlet opening 41 : Evacuation opening 51 : Separation wall 52 : Siphon-like wall 52a : Lower edge of wall 53, 54 : Upstream and downstream vertical blocking walls 55 : Intermediate siphon-like wall 55a : Lower edge of wall 56 : Retaining wall B : Sludge C1 : Decantation compartment C'2, C''2 : Upstream and downstream filtration sub-compartments N : Effluent level S' : Granular substrate of zeolite type S'' : Granular substrate of pumice type #CMT#ENVIRONMENT : #/CMT# Preferred Apparatus: The separating wall (51) has a horizontal upper edge, and transfer of the effluent from the decantation compartment (C1) to the filtration compartment (C'2, C''2) takes place by overflow of this edge. The separating wall is at the assembly interface of two annular modules. The filtration compartment has an intermediate siphon-like wall (55), defining upstream and downstream filtration sub-compartments (C'2, C''2) connected at the bottom; the effluent pours into the top part of the upstream compartment; the evacuation opening is in the downstream compartment; and at least one of the sub-compartments receives a substrate. The filtration compartment is at least partially filled with a substrate (S'') consisting of pumice granules. |
