Innovative technologies convert wastewater into reusable water to mitigate the toll of heavy industrial facilities on the environment. Over the last decade, membrane bioreactors (MBRs) have emerged as a viable alternative to meet this growing demand. This paper compares the design practice and use of these two membrane technologies within a wastew...

This study demonstrates the effects of antiscalants on chemical softening using lime and caustic soda to treat intermediate concentrate. Ten different commercially available antisclants were selected from five different antiscalant manufactures....

This presenation provides a description of pilot scale testing and full-scale design of a zerio liquid discharge facility in Florida. Pilot testing included lime softening and ultrafiltration, followed by plate and tube system RO. Found that RO recovery above 50% was not sustainable. Full scale facility included softening plus UF, with softened wat...

Discusses selenium in mine water and use of MBR. No aeration approach is presented as method for reducing energy. Recipricating motion used to prevent build-up on membranes. Includes pilot test results with membrane performance and water quality....

This session will provide an overview of MF/UF systems in operation and will discuss troubleshooting of these membranes in several applications including water and wastewater treatment. Among these examples include applications of MF/UF technology for RO pretreatment, industrial wastewater treatment and reuse, domestic wastewater treatment, groundw...

This paper investigates whether High Pressure RO can be successfully implemented as second stage RO for brine volume minimization without chemical pretreatment. Consderations include feed water quality, intermediate chemical pretreatment, and lower energy consumption in the HPRO process when compared with concentrate disposal options.The investigat...

This paper presents a study for seawater pretreatment using of a flow profile visualization method in three-dimensions using Acoustic Doppler Velocimeter (ADV) and MATLAB. Flow patterns in contact zone/separation zone/effluent chamber are compared based on the analysis results from the Dissolved Air Flotation pilot tank. The experimental result us...

Presents definition of reuse approaches, focuses in in MBR system types (sheet vs fiber), MBR operations, fouling and emerging MBR technologies...

Presents how RO technology is applied in different types of feedwaters by modifying the arrangement of commercially available membranes within the RO system....

This paper describes the design of a submerged UF/MF system, called LENA (Less Energy No aeration and utilizes a mechanical system to prevent membrane fouling.. This process can be applied to any submerged membrane systems combined with chemical precipitation or biological treatment systems. LENA UF/MF system is suitable for filtration where it is...

The LENA MBR system utilises mechanical membrane reciprocation in place of membrane air scouring to reduce energy consumption. Membrane reciprocation creates an inertial force which acts on the membrane fibres, propelling foulants from the membrane surface. Furthermore, due to the loose packing of the fibres, these fibres are able to move relative ...