Influence of bleaching technologies on the aerobic biodegradability of effluents from Eucalyptus kraft pulps factories

Abstract

ABSTRACT

Utilisation of respirometry to assess organic matter reduction of effluents from the Camaçari industrial complex (BA, Brazil)

“…On the other hand, respirometry seems to be more accurate than Microtox to assess the toxicity reduction at this WTP, since it is a more direct method for assessing sludge activity and thus toxicity to sludge (Ren, 2004) and the whole microbial community is involved in the process, instead of only one organism (Vibrio fischeri), in the Microtox test. Due to the importance of COD reduction in the activated sludge process as it represented the quality of the wastewater treatment (Ubay Çokgör et al, 1998;Baker et al, 1999;Vidal et al, 1999;Reis and Nozaki, 2000;Teixeira et al, 2005), the COD of each effluent treatment step was assessed. EE and TE-COD mean values were 1,576.4 (1,444.5-1,708.4) and 257.7 (226.2-289-1) mg l -1 (Fig.…”

Pulp and paper effluent management

“…Supplemental nutrient demand and the cost of neutralization of combined mill effluent were reduced by these sludge conditioning methods. Vidal et al (1999a) studied the aerobic biodegradability of chlorine bleaching and TCF effluents from a Eucalyptus bleached kraft plant. The overall biodegradability, in terms of COD, was higher for TCF effluents (96-98%) than for chlorine bleaching effluents (82-93%).…”