The performance of flocculation tanks either in full‐ or pilot‐scale systems cannot be fully quantified using average velocity gradient values (G values) alone. The computational fluid dynamics (CFD) process was used to investigate the turbulent flow characteristics of a three‐stage hydraulic flocculation facility at the J.D. Kline Water Supply Plant in Halifax, Nova Scotia. Calculations of the local velocity gradient were achieved using predicted energy dissipation rates. CFD analysis showed unbalanced mixing conditions in the hydraulic flocculation tanks resulting from short‐circuiting and from recirculation zones. Inconsistent mixing energy, interrupted with severe spikes in the localized G values at the weir columns, led to little or no mixing energy in most of the regions in the flocculation tanks. Practical outcomes of operating at such varying mixing gradients can be detrimental to the flocculation process and overall organic removal in the treatment plant.

This bibliography supplements an earlier bibliography on clean glass(Journal of testing and Evaluation, Vol. 5, No. 1, Jan. 1977, pp. 53–57) by extending coverage of the literature from 1973 through 1984. Coupled with the recommendations included in ASTM Practice for Designing a Process for Cleaning Technical Glasses (C912), the list of references, organized into five categories for ready access, should provide a useful up-to-date base for rationally designing a cleaning process.