Influence of organic shock loads on the production of N2O in denitrifying phosphorus removal process

Carbon and nutrient biological removal in a University of Cape Town membrane bioreactor: Analysis of a pilot plant operated under two different C/N ratios

“…Nitrogen (N) and phosphorus (P) play a crucial role in water eutrophication thus requiring their removal from wastewater especially when discharged in sensitive areas [1]. Biological nutrient removal (BNR) from domestic wastewater has been extensively investigated and developed in the last years and it is usually based on anaerobic, anoxic and aerobic reactors linked in-series (among others, Wanner et al [2]; Cosenza et al [3]; Lu et al [4]).…”

“…In BNR processes, N and P removal is accomplished, respectively, by heterotrophic denitrifying bacteria and polyphosphate-accumulating organisms (PAOs) which require carbon source [5]. In particular, the biological phosphorous removal is commonly conducted by exploiting the ability of PAOs to accumulate P and to store it as intracellular polyphosphate (poly-P) under alternating anaerobic/ aerobic conditions [1]. Therefore, in BNR systems the sufficient amount of a carbon source is crucial for the proper removal of nitrogen and phosphorous [6].…”

Bacterial community structure and removal performances in IFAS-MBRs: A pilot plant case study

“…(Wang et al, 2006). Therefore, nutrients abatement is an imperative requirement when discharging in sensitive areas (Li et al, 2013). In the last years, several biological and physic-chemical methods have been applied for nutrients removal from wastewater.…”

“…Several investigations has been carried out in order to get useful insight on biological nutrient removal (BNR) (inter alia Wanner et al, 1992;Cosenza et al, 2013;Lu et al, 2015). BNR is operated thanks to the activity of autotrophic bacteria, heterotrophic bacteria and polyphosphate-accumulating organisms (PAOs), under alternating anaerobic/anoxic/aerobic conditions (Naessens et al, 2012;Li et al, 2013). Traditionally, nitrogen removal is accomplished by the joint activity of ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) for nitrification, while heterotrophic organisms are responsible of denitrification.…”

Performance of Denitrifying Phosphate Removal via Nitrite from Slaughterhouse Wastewater Treatment at Low Temperature

“…Kastsou et al (2015) stated that a high volumetric nitrogen loading rate (vNLR = 0.19-0.21 kgN·m −3 ·d −1 ), at a low DO concentration of 0.7 mg/L, favored nitrite accumulation and phosphorus uptake via nitrite [9]. Li et al [10] found that influent organic shock loads significantly influenced nitrogen (N) and P removal from DPR but higher organic shock loads reduced P removal from DPR. In addition, Zeng et al [11] confirmed that limiting the carbon source benefitted DPR under nitritation.…”