Evaluation of moving-bed biofilm sequencing batch reactor (MBSBR) in operating A2O process with emphasis on biological removal of nutrients existing in wastewater

Abstract

In this study, the performance of Moving-Bed Biofilm Sequencing Batch Reactor (MBSBR) in operating the Anaerobic/Anoxic/Oxic (A 2 O) process for treatment of wastewaters containing nitrogen and phosphorous was evaluated. For this purpose, two bench scale SBR reactors with a total volume of 30 L and functional volume of 10 L were used. The pilot was made of Plexiglass, in which 60 percent of the functional volume consisted of PVC (Kaldnes K3 type) with a specific surface area of 560 m 2 /m 3. The independent variables used in this study were Hydraulic Retention Time (HRT) (1.5, 2, 2.5, 3, and 3.5 h) and organic load (300, 500, 800, 1000 mg/L). The results showed impressive performance in an organic load of 300 mg/L and HRT of 3h with maximum removal of COD and TN respectively by 95.12 and 89.8 percent and in an organic load of 1000 mg/L and HRT of 3.5h with maximum TP removal of 72.33 percent. Therefore, according to the analysis of data obtained by different HRTs, it was revealed that the system of A 2 O has the greater efficiency in the shortest possible time for removing organic matters from wastewater.

Reciclagem biológica do fósforo a partir do efluente suíno originário da biodigestão anaeróbia: uma revisão

“…Já a remoção biológica é mais atraente, pois geralmente utiliza micro-organismos já presentes no lodo ativado, sendo, portanto, menos custosa que a remoção química (Wang et al 2008;Seyedsalehi et al 2017;Bali e Gueddari, 2019). Esta técnica baseia-se no fato de que em condições ótimas para seu crescimento e metabolismo, certas bactérias (Acinetobacter, Pseudomonas, Aerobacter, αe β-proteobactérias, por exemplo) tendem a acumular P na forma de polifosfato em quantidades muito maiores do que a necessária para manter o crescimento da biomassa (Marchetto et al 2003;Neto e Costa 2011;Srinath et al 1959;Wang et al 2008;Wu et al 2009).…”

“…Neste processo, o lodo microbiano é exposto a ciclos de anaerobiose e aerobiose alternados. Em condições de anaerobiose as bactérias acumuladoras de fosfato acumulam polihidroalcanoatos (PHA) e degradam os grânulos de polifosfato, liberando fosfato (Mino et al 1998;Seyedsalehi et al 2017; Majed e Gu 2019).…”

Field engineering application of agricultural farmland surface runoff pollution treatment by combined bioreactor and constructed wetlands

“…Denitrification bioreactor for agricultural runoff on-site treatment has become an essential technology for mitigating nitrate loads (Van Driel et al, 2006;Schipper et al, 2010a, b;Ghane et al, 2015). With emphasis on biological removal of nutrients existing in wastewater, one moving-bed biofilm sequencing batch reactor is used in operating A 2 O process (Seyedsalehi et al, 2018). These bioreactors which can utilize organic electron donors to degrade nitrate to nitrogen gas, typically improve the growth of denitrifying bacteria by using an organic carbon medium (Ghane et al, 2015).…”

Investigation of Waste Water Quality Parameters Discharged from Textile Manufacturing Industries of Bangladesh

“…But continuous monitoring of industrial waste water quality and effluent treatment plants (ETP) is necessary to prevent the risk of surface water pollution. The use of conventional waste water treatment process becomes increasingly challenged and advanced technologies such as anaerobic fluidized bed reactor, aerobic moving bed reactor can be used for the treatment of highly contaminated water [25][26][27][28][29] . The objective of the present research was to characterize industrial effluents from six ready made garments industries of Gazipur, Savar and Narayanganj areas and assess the contamination potential.…”