Biological treatment of an alternating source of organic compounds in a single tube extractive membrane bioreactor

An anaerobic submerged membrane bioreactor was coupled with a novel hydrogen delivery system for hydrogenotrophic denitrification of municipal final effluent containing nitrate. The biological treatment unit and hydrogen delivery unit were proven successful in removing nitrate and delivering hydrogen, respectively. Complete hydrogen transfer resulted in reducing nitrate below detectable levels at a loading of 0.14 kg N m−3 d−1. The produced water met all drinking water guidelines except for color and organic carbon. However, the organic carbon was removed by 72% mostly by membrane rejection. To reduce the organic carbon and color of the effluent, post treatment of the produced water is required.

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Towards high through-put biological treatment of municipal wastewater and enhanced phosphorus recovery using a hybrid microfiltration-forward osmosis membrane bioreactor with hydraulic retention time in sub-hour level

Bioresource Technology ◽

10.1016/j.biortech.2016.07.126 ◽

2016 ◽

Vol 219 ◽

pp. 298-310 ◽

Cited By ~ 24

Author(s):

Guanglei Qiu ◽

Sui Zhang ◽

Divya Shankari Srinivasa Raghavan ◽

Subhabrata Das ◽

Yen-Peng Ting

Keyword(s):

Retention Time ◽

Biological Treatment ◽

Membrane Bioreactor ◽

Municipal Wastewater ◽

Hydraulic Retention Time ◽

Forward Osmosis ◽

Phosphorus Recovery

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The Biological Treatment of Waste Gases from Small Urban Sources (Emission of Volatile Organic Compounds)

Environmental Technology ◽

10.1007/978-94-009-3663-8_26 ◽

1987 ◽

pp. 224-230

Author(s):

A. J. Dragt ◽

A. Jol ◽

C. Lith ◽

S. P. P. Ottengraf

Keyword(s):

Volatile Organic Compounds ◽

Organic Compounds ◽

Biological Treatment ◽

Volatile Organic

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Nitrification as a source of soluble organic substrate in biological treatment

Water Science & Technology ◽

10.2166/wst.1994.0247 ◽

1994 ◽

Vol 30 (6) ◽

pp. 1-8 ◽

Cited By ~ 72

Author(s):

Bruce E. Rittmann ◽

John M. Regan ◽

David A. Stahl

Keyword(s):

Kinetic Analysis ◽

Organic Compounds ◽

Biological Treatment ◽

Heterotrophic Bacteria ◽

Theoretical Work ◽

Organic Substrate ◽

Nitrifying Bacteria ◽

Organic Substrates ◽

Soluble Microbial Products ◽

Microbial Products

In complex, multispecies populations, exchange of substrates can be an important beneficial interaction. Prior experimental and theoretical work has led to the hypothesis that the formation of soluble microbial products (SMP) by nitrifying bacteria can provide a supplementary organic substrate for heterotrophic bacteria, thereby augmenting their accumulation and stability, especially when inputs of organic substrates are low. In this study, chemostat experiments carried out with a NO2−-oxidizing strain (Nitrobacter sp.) and an NH4+-oxidizing strain (Nitrosomonas europaea) demonstrated that both nitrifiers produce SMP that can support heterotrophic bacteria. The first evidence was the presence of significant concentrations of soluble COD in the chemostat effluent, even though the influent was free of organic compounds. Second, a small heterotrophic population was maintained, apparently through utilization of the nitrifier-produced SMP. A preliminary kinetic analysis suggested that SMP kinetic parameters can be adapted from parameters measured for heterotrophs.

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Analysis of Microbial Community Dynamics during the Acclimatization Period of a Membrane Bioreactor Treating Table Olive Processing Wastewater

Applied Sciences ◽

10.3390/app9183647 ◽

2019 ◽

Vol 9 (18) ◽

pp. 3647 ◽

Cited By ~ 1

Author(s):

Sotiris I. Patsios ◽

Sofia Michailidou ◽

Konstantinos Pasentsis ◽

Antonios M. Makris ◽

Anagnostis Argiriou ◽

...

Keyword(s):

Microbial Community ◽

Biological Treatment ◽

Large Scale ◽

Membrane Bioreactor ◽

Community Dynamics ◽

Metabolic Adaptation ◽

Process Step ◽

Microbial Community Dynamics ◽

Table Olive ◽

Acclimatization Period

Biological treatment of table olive processing wastewater (TOPW) may be problematic due to its high organic and polyphenolic compound content. Biomass acclimatization is a necessary, yet sensitive, stage for efficient TOPW biological treatment. Next-generation sequencing technologies can provide valuable insights into this critical process step. An aerobic membrane bioreactor (MBR) system, initially inoculated with municipal activated sludge, was acclimatized to treat TOPW. Operational stability and bioremediation efficiency were monitored for approx. three months, whereas microbial community dynamics and metabolic adaptation were assessed through metagenomic and metatranscriptomic analysis. A swift change was identified in both the prokaryotic and eukaryotic bio-community after introduction of TOPW in the MBR, and a new diverse bio-community was established. Thauera and Paracoccus spp. are dominant contributors to the metabolic activity of the stable bio-community, which resulted in over 90% and 85% removal efficiency of total organic carbon and total polyphenols, respectively. This is the first study assessing the microbial community dynamics in a well-defined MBR process treating TOPW, offering guidance in the start-up of large-scale applications.

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