Alcoa Inc.

Alcoa USA Corp.

Corporate Environmental Solutions LLC

Jonell Kerkhoff

Xinghua Liu

John R Smith

Frankie E Phelps

Robert A DiMilia

Rajat S Ghosh

Joseph M Dynys

John Pearson Smith

Jaw K Fu

Kevin Kitzman

Dennis L Fulmer

Douglas A Weirauch

Robin L Weightman

Andrew C Middleton

Robert C Horger

Rajat Ghosh

Aniruddha Bhattacharyya

Jeff Ward

Aniruddha Bhattachayya

Robert Weightman

A system is provided including an electrolysis cell configured to retain a molten electrolyte bath, the bath including at least one bath component, the electrolysis cell including: a bottom, and a sidewall consisting essentially of the at least one bath component; and a feed material including the least one bath component to the molten electrolyte bath such that the at least one bath component is within 30% of saturation, wherein, via the feed material, the sidewall is stable in the molten electrolyte bath.

Systems and methods of protecting electrolysis cell sidewalls

A system is provided including an electrolysis cell configured to retain a molten electrolyte bath, the bath including at least one bath component, the electrolysis cell including: a bottom, and a sidewall consisting essentially of the at least one bath component; and a feeder system, configured to provide a feed material including the least one bath component to the molten electrolyte bath such that the at least one bath component is within 2% of saturation, wherein, via the feed material, the sidewall is stable in the molten electrolyte bath.

Wastewater treatment systems, methods and apparatus for polishing a wastewater stream comprising a plurality of contaminants are provided. One system includes a vessel containing a plurality of natural media filtration agents selected to remove selected ones of the plurality of contaminants from the wastewater stream. In one embodiment, the vessel includes a bed of bauxite residue and at least one other natural media filtration agent. In another embodiment, the vessel includes a bed of compost and at least one other natural media filtration agent. The vessel includes a wastewater inlet that is in fluid communication with one or more of the natural media filtration agents. The vessel includes a wastewater outlet that is in fluid communication with one or more of the natural media filtration agents.

Methods for polishing wastewater utilizing a bed of commingled bauxite residue and iron filings

Systems for polishing wastewater utilizing natural media filtration

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Murrysville, PA, United States of America

Jonell Kerkhoff