Determination/Validation of Technologies for Treatment/Recycle of Contaminated Sludges: Phase 2 - Field Tests
Abstract
The Air Force Air Logistics Centers (AF-ALCs) generate large quantities of sludges from their industrial wastewater treatment plants (IWTPs). While these sludges are not toxic based on toxicity characteristic leachant procedure (TCLP) values, these are still classified as "F-waste" (e.g., F002, F005, F006) since the waste waters originate in plating and other metal finishing operations. The Acurex-Battelle Team (ABT) was contracted by the Air Force Research Laboratory (AFRL/MLQ) to identify and evaluate technologies to minimize the volume of these sludges. This report covers the Phase I field tests for: dewatering by flocculation and filtration; metals removal by Liquid Ion Exchange (LIX); Alternative Chemistry of Impurity Based Solids Contact Clarifier Blanket; and Low-Temperature Sludge Drying (Dehumidification). The results of flocculation and filtration testing at WR-ALC were very positive and justify full-scale implementation of the process to economically reduce sludge disposal at WR-ALC by 92 tons/year. The LIX tests at WR-AL showed that the implementation of the anion LIX (A-LIX) process to remove CrVI has the potential to reduce sludge generation at WR-ALC by 276 tons/year. Its scale-up and implementation is recommended. The tests on alternative metal precipitation chemistry at OC-ALC indicated that the use of chemicals to precipitate CrVI and metals can be significantly reduced. It was also determined that dibasic sodium phosphate is a good polishing agent for CrII. However, additional pilot testing is needed to optimize the process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1998
- Accession Number
- ADA354656
Entities
People
- Bruce Monzyk
- Dale Folsom
- Nick Conkle
- Satya Chauhan
- Tim Werner
Organizations
- Battelle Memorial Institute