Industrial estate wastewater treatment using single up‐flow aerobic/anoxic sludge bed (UAASB) bioreactor: A kinetic evaluation study

Abstract

In this study, performance and kinetic analysis of carbon and nutrients removal in an up-flow aerobic/anoxic sludge bed (UAASB) bioreactor for the treatment of an industrial estate wastewater was investigated. The performance of the reactor was evaluated as a function of two variables, including hydraulic retention time (HRT) of 4, 8, and 12 h and aeration time of 40 and 60 min/h. To obtain the kinetic coefficients, mass balance, first-order, second-order, and Stover-Kincannon models were employed. From the mass balance model, growth yield (Y), microbial decay rate (K d ), were found to be 0.161 g volatile suspended solid (VSS)/g chemical oxygen demand (COD), 0.039 1/d, respectively, whereas for first-order model (K 1 ) was 4.56 1/d. The constant values for Stover-Kincannon model were obtained as half-velocity constant (K B 5 9.82 g/L) and maximum total substrate removal rate constant (U max 5 8.47 g/L d).

Effect of reactor height/diameter ratio and organic loading rate on formation of aerobic granular sludge in sewage treatment

“…However, as shown in Table 5, the K s value in this study is higher compared to the results by Asadi et al (2014), Kaewsuk et al (2010) and Mizzouri and Shaaban (2013), which employ a substrate with more a complicated structure than sewage. Besides, the K s value in this study is significantly higher than that reported by Metcalf and Eddy et al (2003), and is equal to the study by Pala and B€ olükba (2005), who both consider sewage as a substate.…”

“…This result is in line with Kaewsuk et al (2010) for a high K s value, which demonstrated the activeness of aerobic microbial. However, Asadi et al (2014) found that a process or system with a high value of K s is less efficient. Thus, a plot of m max versus K s was plotted (Fig.…”

“…5) was lower: 0.52 for Batch2 AGS, and above 0.70 for Control, Batch1, Batch3 and Batch4. Asadi et al (2014) reported an R 2 reading of 0.62 for the determination of m max and K s , and suggested the lack of fit was due to the low biodegradability of COD.…”

“…Chen et al (2008), Liu and Tay (2007) and Muda et al (2011) mainly focus on the determination of endogenous decay coefficient (K d ), synthesis yield coefficient (Y) and maximum specific microbial growth rate (m max ) for aerobic granules that develop in synthetic wastewater, directly from equations, and not from a linear plot. Meanwhile, Asadi et al (2014), Kaewsuk et al (2010) and Mizzouri and Shaaban (2013) provide details for the determination of biokinetic parameters using a linear plot for the biodegradation of real wastewater in reactors other than a sequencing batch reactor (SBR).…”

Modeling the kinetics and cost performance index of high rate up‐flow anaerobic, anoxic, oxic bioreactor for meat wastewater treatment

“…This implies that MIW contains readily biodegradable substrates and the bioreactor has substantial COD removal capacity (Asadi et al . ; Guo et al . ).…”