Although most PAHs with fewer than five rings are known to be biodegraded under aerobic conditions, most contaminated sediments and soils are anaerobic. In these environments, aerobic bioremediation may be difficult to implement because of the problems associated with oxygen delivery to the subsurface. With recent results clearly demonstrating some bicyclics and PAHs can be degraded without oxy...

The influence of the ethanol concentration on the composition and activity of a developed biofilm in a denitrifying submerged unidirectional filter was studied. Process yields (represented as inorganic nitrogen removal), total platable bacteria, denitrifying bacteria, nitrate- and sulphate-reducing bacteria and denitrifying activity (N2O production) were compared at different ethanol concentrat...

Introduction The reduction of nitrite to nitric oxide (NO) by whole cells of denitrifying bacteria Pseudomonas aeruginosa, P. jluorescens, P. aerufaciens and Acaligenes fecalis was studied by EPR in conjunction with spin trapping technique. Among these bacteria, P. aeruginosa which is ubiquitous in nature and generally innocuous in most environments, is of special clinical interests, since it c...

Initial reactions in anaerobic oxidation of ethylbenzene were investigated in a denitrifying bacterium, strain EB1. Cells of strain EB1 mineralized ethylbenzene to CO2 under denitrifying conditions, as demonstrated by conversion of 69% of [14C]ethylbenzene to 14CO2. In anaerobic suspensions of strain EB1 cells metabolizing ethylbenzene, the transient formation and consumption of 1-phenylethanol...

Efficient nutrient removal from mixed black water is under challenge in the context of global pollution control and circular economy. The anaerobic-anorexic-aerobic process a widely used biological technology for wastewater treatment, yet its denitrification capacity limited by low biodegradable organics to nitrogen (C/N) ratio due prior degradation water. We have previously proved that weak el...

INTRODUCTION....................................................................... 43 ANAEROBIC MICROBIAL PROCESSES ....................................................................... 43 Microbial Diversity......... 0 43 Representative Degradative Pathways of Aromatic Compounds under Anaerobic Conditions ...............44 METABOLISM OF HOMOCYCLIC AROMATIC COMPOUNDS UNDER ANAEROBIC CONDITIO...

3,3′-Diaminobenzidine was applied at doses of 5, 10, 25, and 50 mg kg−1 of soil and their effects were evaluated on indigenous soil microbial communities (viable aerobic bacteria, fungal populations, aerobic N2-fixing bacteria, denitrifying, and nitrifying bacteria), and soil enzymatic activities (acid and alkaline phosphatases, arylsulfatase, and dehydrogenase). At doses of 5 or 10 mg kg−1, 3,...