Track topics on Twitter Track topics that are important to you
Membrane fouling is one of the biggest challenges in the widespread application of membrane bioreactors. In this study, a combined system of anaerobic-anoxic-oxic membrane bioreactor (AO-MBR) and worm reactor (WR) was established for fouling control. In AO-MBR-WR, the membrane filtration cycle was prolonged by 66.7% due to the confluence of microaerobic treatment and worm predation in WR with the interaction between WR and AO-MBR. Compared with conventional AO-MBR, membrane rejection of soluble and colloidal foulants (SCF) in the combined system was decreased by 26.0%, which could be attributed to the higher biodegradability of SCF and the higher bacterial activity in AO-MBR. Although floc size in AO-MBR was reduced due to sludge disintegration and worm predation in WR, changes of floc surface properties could counteract this negative effect on fouling. Complex effects of sludge flocs on membrane fouling were further analyzed by the interaction energy between sludge flocs and the clean/fouled membrane based on extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory. The energy barriers indicated that flocs in AO-MBR-WR were difficult to adhere to the membrane and were more likely to detach. Moreover, high-throughput sequencing analysis revealed that the microbial community of the cake layer in the combined system was more even and had a higher proportion of foulants degradation related bacteria, which was beneficial for fouling mitigation. The combination of AO-MBR and WR has shown significant advantages in membrane fouling mitigation.
This article was published in the following journal.
Name: Environment international
The objective of this study was to investigate the removal of 11 synthetic polycyclic musks in a municipal wastewater treatment plant located in Jilin, China, by using a membrane bioreactor combined w...
This paper investigates the efficiency of fouling mitigation methods using a novel outer selective hollow fiber thin-film composite forward osmosis (OSHF TFC FO) membrane for osmosis membrane bioreact...
The effects of ultraviolet/persulfate (UV/PS) pretreatment on ultrafiltration (UF) membrane fouling caused by typical natural organic matter (NOM) fractions including humic acid (HA), sodium alginate ...
A novel pilot gravity-driven anoxic/oxic fed-batch membrane bioreactor (AFMBR) was developed to treat real domestic wastewater. In this process, the anoxic and oxic stages created favorable conditions...
Forward osmosis (FO) has gained increasing interests in wastewater treatment and reclamation. However, membrane fouling has become one major obstacle hindering FO application. A novel mitigation appro...
Ridge Preservation Comparing the Clinical and Histologic Healing of Membrane vs. no Membrane Approach to Grafting.
The primary objective of HOPE is to improve the accuracy of outcome prediction in anoxic-ischemic encephalopathy following cardiac arrest by bringing under close scrutiny some of the exis...
The purpose of this study is to examine the effect of varying nitrate doses of beetroot juice supplementation on dynamic, multijoint resistance exercise performance in active, trained indi...
The Poly Cystic Ovary Syndrome (PCOS), is one of the most common reasons for subfertility, oligomenorrhea and amenorrhea. With the occurrence of 6-20% of the general adult women population...
Observation of prescription usage of anaerobic antibiotics for patients admitted to the ICU with pneumonia.
A genus of gram-negative, anaerobic, nonsporeforming bacteria in the family Desulfuromonadaceae. It is found in anoxic marine sediments.
A genus of gram-positive, anaerobic, cocci to short rod-shaped ARCHAEA, in the family METHANOBACTERIACEAE, order METHANOBACTERIALES. They are found in the GASTROINTESTINAL TRACT or other anoxic environments.
Functionally and structurally differentiated, purple-pigmented regions of the cytoplasmic membrane of some strains of Halobacterium halobium. The membrane develops under anaerobic conditions and is made almost entirely of the purple pigment BACTERIORHODOPSINS. (From Singleton & Sainsbury Dictionary of Microbiology and Molecular Biology, 2d ed)
Any situation where an animal or human is trained to respond differentially to two stimuli (e.g., approach and avoidance) under reward and punishment conditions and subsequently trained under reversed reward values (i.e., the approach which was previously rewarded is punished and vice versa).
Mechanical or anoxic trauma incurred by the infant during labor or delivery.
DNA sequencing is the process of determining the precise order of nucleotides within a DNA molecule. During DNA sequencing, the bases of a small fragment of DNA are sequentially identified from signals emitted as each fragment is re-synthesized from a ...