Curtis W. Bryant

SEASONAL AND IN-MILL ASPECTS OF ORGANIC HALIDE REMOVAL BY AN AERATED STABILIZATION BASIN TREATING A KRAFT MILL WASTEWATER

Levels of total organic hallde (TOX) in a Kraft mill wastewater ranged from 26,000 to 60,000 µg/l. An aerated stabilization basin (ASB) proved capable of removing one-third to one-half of both the total TOX as well as lower molecular weight (<l,000) TOX. Influent. TOX levels varied as a function of in-mill production activities. Removal of specific size fractions of of organic halide were influenced to different extents by influent variations and seasonal effects. The major removal mechanism appears to be biosorption of TOX onto settling biomass, followed by anaerobic dehalogenation within the benthal layer of the ASB.

Factors affecting coagulation with aluminum sulfate—I. Particle formation and growth

Abstract This paper describes the effects of several important water quality and water treatment variables on particle formation and growth during chemical coagulation. Experimental variables included initial pH, initial turbidity, aluminum sulfate dose, preozonation dose and flocculation time. An orthogonal experimental design was employed with statistical analysis of data by the Duncans Multiple Range Test. The variables investigated proved to be capable of imparting, individually or collectively, statistically significant effects on particle formation and growth. Particle growth during coagulation is a necessary prerequisite for the effective use of subsequent solid-liquid separation processes.

MEASUREMENT OF MOLECULAR WEIGHT DISTRIBUTIONS OF ORGANIC HALIDE IN KRAFT MILL WASTE STREAMS, WASTE SOLIDS AND PULP

Abstract Analytical procedures were developed for determining the apparent molecular weight (AMW) distribution of organic halide in both liquid and solid pulp and paper process components. The techniques included molecular weight separations using ultrafiltration (UF) and determinations using adsorption‐pyrolysis‐microcoulometry (AC/MC). Correction coefficients for rejection properties of UF membranes were determined using a diafiltration technique.