Organic loading rate shock impact on extracellular polymeric substances and physicochemical characteristics of nitrifying sludge treating high-strength ammonia wastewater under unsteady-state conditions

Abstract

Laboratory experimentation was used to investigate the impact of the organic loading rate shock on extracellular polymeric substances (EPSs) and the physicochemical characteristics of nitrifying sludge (NS) treating high-strength ammonia wastewater.

Removal of Nutrients From Anaerobically Digested Swine Wastewater Using an Intermittent Cycle Extended Aeration System

“…This behavior can be explained as due to a decline in the activity of the microorganisms caused by an organic shock load. The organic loading rate is an important parameter to be considered for bioreactor operation because an unexpected increase in the organic loading rate will cause a shock load stress and affect the structure and composition of the microbial communities, biomass-liquid separation, surface properties of the sludge, activity of the microbial community, and the pollutant removal efficiencies ( Yang et al, 2018 ). Chelliapan et al (2017) showed that the organic carbon rate affected the COD removal efficiency, wherein COD removal efficiencies of 99, 95, and 36.5% were obtained at organic loading rates of 0.258, 0.787, and 2.471, respectively.…”

The application of membrane sequencing batch reactors in high rate activated sludge processes: the effect of the organic loading rate on the bioflocculation and fouling phenomenon

“…It has been reported that metabolic products, which can form an active response to increasing OLR and Environmental Science: Water Research & Technology Paper lead to inhibition of microbial activities, are more readily distributed in the outer layer of the cells, thus influencing the yield of LB-EPS. 49 Also, the total LB-EPS content showed a meaningful negative correlation (r p = −0.934, p-value = 0.002) whereas TB-EPS showed a statistically significant positive correlation (r p = 0.593, p-value = 0.021) with bioflocculation.…”