A pronounced deficit of nitrogen (N) in the oxygen minimum zone (OMZ) of the Arabian Sea suggests the occurrence of heavy N-loss that is commonly attributed to pelagic processes. However, the OMZ water is in direct contact with sediments on three sides of the basin. Contribution from benthic N-loss to the total N-loss in the Arabian Sea remains largely unassessed. In October 2007, we sampled th...

Abstract Modified biochar with higher electron transport and adsorption capabilities could significantly improve the performance of anaerobic ammonia oxidation (anammox). However, there are few related investigations on reinforcement anammox through iron-modified Enteromorpha prolifera (IMEPB). In this study, addition IMEPB in system, enhancing process was studied, improving feasibility evaluat...

Anaerobic ammonium oxidation (anammox) has shown success in past years for the treatment of municipal and industrial wastewater containing inorganic nutrients (i.e., nitrogen). However, increase polycyclic aromatic hydrocarbon (PAH)-contaminated matrices calls new strategies efficient environmentally sustainable remediation. Therefore, present review examined literature on connection between an...

The century-old trickling filters at the Daspoort Wastewater Treatment Works in Pretoria (Gauteng, South Africa) are known for their remarkable removal of nitrogen from municipal wastewater. Our study was conducted to identify the microbiological processes responsible for this phenomenon and to establish whether anammox bacteria may be involved. An aerobic and anaerobic bench top reactor, both ...

Fluorescence in situ hybridization (FISH) using fluorochrome-labeled DNA oligonucleotide probes has been successfully applied for in situ detection of anaerobic ammonium oxidizing (anammox) bacteria. However, application of the standard FISH protocols to visualize anammox bacteria in biofilms from a laboratory-scale wastewater reactor produced only weak signals. Increased signal intensity was a...

Abstract The integration of anaerobic ammonia oxidation (anammox) into the membrane bioreactor (MBR) process (AX-MBR) is proposed in this study to reduce operating costs. temperature was not controlled during study. Anammox, denitrification, and nitrification were studied AX-MBR for 210 days. reactor fed with mainstream sewage from Guilin City, China. results showed that could run reduced disso...

To reduce operational costs and carbon footprints, it is highly desirable to achieve energy neutrality in municipal wastewater treatment plants (WWTPs). We reviewed more than 100 nitrification/denitrification (N/DN)- anaerobic ammonia oxidation (ANAMMOX)-based systems. The consumption performance of N/DN systems ranged from 0.3 4 kWh/kg COD 5 15 N, while those ANAMMOX-based 1 0.5 1.5 N. Accordi...

The research was conducted to investigate the microbial diversity and population with the different concentration of NH(4)(+)-N in a biofilm reactor filled with volcanic filter for completely autotrophic nitrogen-removal over nitrite (CANON) process. The reactor had an excellent performance with the decreasing of NH(4)(+)-N concentration from 400 to 200 mg L(-1) while NH(4)(+)-N removal loading...

This study determined how the activity and number of nitrogen-converting microorganisms varied with changes in hydraulic retention time (HRT) and the operating regime of aerobic granular sequencing batch reactors (GSBRs) treating high-nitrogen wastewater. Continuously aerated (O-mode) GSBRs were operated at HRTs of 10-, 13- and 19-h. Then the same reactors were operated at identical HRTs but th...