Use of aged sludge bioaugmentation in two-stage activated sludge system to enhance the biodegradation of toxic organic compounds in high strength wastewater

Microbial community dynamics and functional responses that contribute to tolerance of high concentrations of petroleum hydrocarbon

“…AS can degrade and remove organic substances, nitrogen and phosphorus via a large number of heterotrophic bacteria, nitrifying bacteria, denitrifying bacteria and phosphorus‐accumulating bacteria . The functional microorganisms in AS can form networks via different types of interactions, including positive (mutualistic) or adverse (competitive) interactions, through which the microorganisms are capable of degrading and removing large amounts of organic waste …”

“…19 The functional microorganisms in AS can form networks via different types of interactions, including positive (mutualistic) or adverse (competitive) interactions, through which the microorganisms are capable of degrading and removing large amounts of organic waste. 20,21 Recently, AS has been successfully applied in the remediation of PH pollution and has shown great advantages. 22,23 However, the types and concentrations of PH as well as the structure and function of the microbial community have always been the main factors which limit the efficiency of PH remediation using AS.…”

Bioaugmentation effect of Aeromonas hydrophila and Pseudomonas putida on kinetics of activated sludge process in treating pharmaceutical industrial wastewater

“…Industrial wastewater contains a broad spectrum of different compounds that can be degradation‐resistant and stay unchanged in wastewaters treated with the activated sludge process. The necessity to establish economical and environmentally friendly technology which can cope with complex wastewaters, has led researchers to explore ways to enhance the efficiency of biodegradation using activated sludge . One technology notable for efficient contaminant removal is bioremediation, in which microbial metabolism is used in specific conditions to rapidly break down contaminants, targeting their degradation to final components such as water and CO 2 .…”

“…The necessity to establish economical and environmentally friendly technology which can cope with complex wastewaters, has led researchers to explore ways to enhance the efficiency of biodegradation using www.soci.org M Vuković Domanovac, M Šabić Runjavec, E Meštrović activated sludge. 15 One technology notable for efficient contaminant removal is bioremediation, in which microbial metabolism is used in specific conditions to rapidly break down contaminants, targeting their degradation to final components such as water and CO 2 . 16,17 Bioremediation can be improved through bioaugmentation by introducing enzymatically adequate microorganisms to wastewater, leading to improvement of the removal efficiency of specific compounds such as refractory organics or lowering overall chemical oxygen demand (COD).…”

“…16,17 Bioremediation can be improved through bioaugmentation by introducing enzymatically adequate microorganisms to wastewater, leading to improvement of the removal efficiency of specific compounds such as refractory organics or lowering overall chemical oxygen demand (COD). 18,19 Bioaugmentation offers the potential for enhanced treatment of the complex mixture of compounds associated with industrial wastewater, 15,20 but its success depends on the application of suitable microbial strains and their ability to survive in the contaminated environment. Thus, adaptation of the metabolism of autochthonous microorganisms for specific contaminants could lead to enhanced bioremediation.…”