Infiltration/inflow control for membrane bioreactor
First Claim
Patent Images
1. A wastewater treatment system comprising:
- a plurality of treatment zones including an upstream treatment zone in fluid communication with one or more downstream treatment zones;
a membrane module in fluid communication downstream of the upstream treatment zone and the one or more downstream treatment zones, the membrane module comprising a filter membrane;
a gravity-settling device in fluid communication downstream of the upstream treatment zone and upstream of the one or more downstream treatment zones;
a weir positioned between the upstream treatment zone and the gravity settling device and configured to provide a flow of liquid between the upstream treatment zone and the gravity settling device responsive to a flow of wastewater into the wastewater treatment system exceeding an average design flow rate and to block the flow of liquid between the upstream treatment zone and the gravity settling device responsive to the flow of wastewater into the wastewater treatment system not exceeding the average design flow rate;
wherein a height of the weir is automatically adjustable based on a measurement of a process variable of the wastewater treatment system.
6 Assignments
0 Petitions
Accused Products
Abstract
A method and system for wastewater treatment comprising a first treatment zone (11) fluidly connected to one or more further treatment zones (12, 13, 14), a membrane module (16) comprising a filter membrane positioned in or fluidly connected to the further treatment zone (14), a gravity settling device (15) fluidly connected to the first treatment zone (11) to receive overflow therefrom; and a flow control device (23) between the first treatment zone (11) and the gravity settling device (15) to control the flow of liquid therebetween.
636 Citations
12 Claims
-
1. A wastewater treatment system comprising:
-
a plurality of treatment zones including an upstream treatment zone in fluid communication with one or more downstream treatment zones; a membrane module in fluid communication downstream of the upstream treatment zone and the one or more downstream treatment zones, the membrane module comprising a filter membrane; a gravity-settling device in fluid communication downstream of the upstream treatment zone and upstream of the one or more downstream treatment zones; a weir positioned between the upstream treatment zone and the gravity settling device and configured to provide a flow of liquid between the upstream treatment zone and the gravity settling device responsive to a flow of wastewater into the wastewater treatment system exceeding an average design flow rate and to block the flow of liquid between the upstream treatment zone and the gravity settling device responsive to the flow of wastewater into the wastewater treatment system not exceeding the average design flow rate; wherein a height of the weir is automatically adjustable based on a measurement of a process variable of the wastewater treatment system. - View Dependent Claims (2, 3)
-
-
4. A wastewater treatment system comprising:
-
a plurality of treatment zones including an upstream treatment zone in fluid communication with one or more downstream treatment zones; a membrane module in fluid communication downstream of the upstream treatment zone and the one or more downstream treatment zones, the membrane module comprising a filter membrane; a control means configured to control a ratio between an amount of a mixed liquor from the filter membrane which is returned to the upstream treatment zone and an amount of mixed liquor from the filter membrane which is returned to the one or more downstream treatment zones; a gravity-settling device in fluid communication downstream of the upstream treatment zone and in fluid communication upstream of the one or more downstream treatment zones; and a flow control device positioned between the upstream treatment zone and the gravity settling device and configured to provide a flow of liquid between the upstream treatment zone and the gravity settling device responsive to a flow of wastewater into the wastewater treatment system exceeding an average design flow rate and to block the flow of liquid between the upstream treatment zone and the gravity settling device responsive to the flow of wastewater into the wastewater treatment system not exceeding the average design flow rate. - View Dependent Claims (5, 6, 7)
-
-
8. A wastewater treatment system comprising:
-
a plurality of treatment zones including an upstream treatment zone in fluid communication with one or more downstream treatment zones; a membrane module in fluid communication downstream of the upstream treatment zone and the one or more downstream treatment zones, the membrane module comprising a filter membrane; a gravity-settling device in fluid communication downstream of the upstream treatment zone and in fluid communication upstream of the one or more downstream treatment zones; a flow control device positioned between the upstream treatment zone and the gravity settling device and configured to provide a flow of liquid between the upstream treatment zone and the gravity settling device responsive to a flow of wastewater into the wastewater treatment system exceeding an average design flow rate and to block the flow of liquid between the upstream treatment zone and the gravity settling device responsive to the flow of wastewater into the wastewater treatment system not exceeding the average design flow rate; and an outflow line for returning sludge separated from a mixed liquor in the gravity settling device to one of the plurality of downstream treatment zones. - View Dependent Claims (9, 10, 11, 12)
-
Specification