Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
228 words
A mechanical-biological waste water purification plant, particularly a pre-clarifying plant to be connected to a postclarifying plant, comprising, in combination, a pre-clarifying basin having side walls; a sludge digestion zone arranged beneath and communicating with said basin; a feed inlet communicating with the upper portion of said basin; a device floating on the liquid in said basin; an adjustably positionable discharge pipe within said pre-clarifying basin and having an inlet end communicating with said device and an outlet end extending through a side wall of said basin at a level below said feed inlet; said discharge pipe providing a flow rate less than the flow rate of said feed inlet, whereby said pre-clarifying basin has a first buffer zone whose height corresponds to the vertical distance between said feed inlet and the outlet end of said discharge pipe; a tank; said pre-clarifying basin being arranged inside the upper part of said tank, and the lower part of said tank forming said sludge digestion zone, whereby said upper part of said tank defines a second buffer zone open at the bottom and delimited laterally by the wall of said tank and the side walls of said pre-clarifying basin; and at least one valve venting the upper part of said second buffer zone; whereby level equalization, effected by communication between said preclarifying basin and said sludge digestion zone, is delayed.
Claim 2
Dependent Claim
228 words
A mechanical-biological waste water purification plant, particularly a pre-clarifying plant to be connected to a postclarifying plant, comprising, in combination, a pre-clarifying basin having side walls; a sludge digestion zone arranged beneath and communicating with said basin; a feed inlet communicating with the upper portion of said basin; a device floating on the liquid in said basin; an adjustably positionable discharge pipe within said pre-clarifying basin and having an inlet end communicating with said device and an outlet end extending through a side wall of said basin at a level below said feed inlet; said discharge pipe providing a flow rate less than the flow rate of said feed inlet, whereby said pre-clarifying basin has a first buffer zone whose height corresponds to the vertical distance between said feed inlet and the outlet end of said discharge pipe; a tank; said pre-clarifying basin being arranged inside the upper part of said tank, and the lower part of said tank forming said sludge digestion zone, whereby said upper part of said tank defines a second buffer zone open at the bottom and delimited laterally by the wall of said tank and the side walls of said pre-clarifying basin; and at least one valve venting the upper part of said second buffer zone; whereby level equalization, effected by communication between said preclarifying basin and said sludge digestion zone, is delayed.
Claim 3
Dependent Claim
20 words
A mechanical-biological waste water purification plant, as claimed in claim 1, in which said discharge pipe is a flexible pipe.
Claim 4
Dependent Claim
20 words
A mechanical-biological waste water purification plant, as claimed in claim 1, in which said discharge pipe is a jointed pipe.
Claim 5
Dependent Claim
33 words
A mechanical-biological waste water purification plant, as claimed in claim 1, in which said discharge pipe has a cross sectional flow area less than the cross sectional flow area of said feed inlet.
Claim 6
Dependent Claim
19 words
A mechanical-biological waste Water purification plant, as claimed in claim 1, including a flow restrictor in said discharge pipe.
Claim 7
Dependent Claim
34 words
A mechanical-biological waste water purification plant, as claimed in claim 1, in which said valve is a one-way valve opening in the air flow direction from the upper part of said second buffer zone.
Claim 8
Dependent Claim
87 words
A mechanical-biological waste water purification plant, as claimed in claim 1, in which the side walls of said pre-clarifying basin slope downwardly and inwardly so that the upper part of said basin has the greater horizontal cross section; said pre-clarifying basin, below the point at which the outlet end of said discharge pipe extends through a side wall of said basin, being divided into at least two juxtaposed basin chambers having downwardly and inwardly inclined walls, each chamber having a sludge outlet port at its bottom end.
Claim 9
Dependent Claim
42 words
A mechanical-biological waste water purification plant, as claimed in claim 1, including a post-clarifying plant having an activated sludge zone; and a drain pipe connecting said activated sludge zone of said post-clarifying plant to said second buffer zone of said pre-clarifying plant.
Claim 10
Dependent Claim
66 words
A mechanical-biological waste water purification plant, as claimed in claim 1, including a post-clarifying plant having a tank; an outlet pipe connecting said last-mentioned tank to the outlet end of said discharge pipe; said post-clarifying plant having a post-clarifying basin within said last-mentioned tank; a weir floating on the liquid in said post-clarifying basin; and an adjustably positionable second discharge pipe connected to said floating weir.
Claim 11
Dependent Claim
42 words
A mechanical-biological waste water purification plant, as claimed in claim 9, including a second outlet pipe connected to the discharge pipe of said post-clarifying plant; and a restrictor in said second outlet pipe restricting the flow rate through said first-mentioned discharge pipe.