Hydroxylamine addition enhances fast recovery of anammox activity suffering Cr(VI) inhibition.
TL;DR: In this paper, NH2OH was employed to test the recovery performance because of its stimulation to anammox bacteria, and the recovery efficiency was over 166% with the effluent Cr(VI and Cr(III) below 0.25 and 0.12% respectively.
About: This article is published in Bioresource Technology.The article was published on 2021-03-02. It has received 15 citations till now. The article focuses on the topics: Anammox.
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University of Sri Jayewardenepura1, University of Kelaniya2, Open University of Sri Lanka3, Pusan National University4, Kalyani Government Engineering College5, Commonwealth Scientific and Industrial Research Organisation6, Universiti Malaysia Terengganu7, Sri Sivasubramaniya Nadar College of Engineering8
TL;DR: In this paper, the authors provide a comprehensive viewpoint on anammox bacteria and the key perspectives in applying them as an efficient strategy for wastewater treatment, and provide a review article on the recent yet comprehensive viewpoint.
38 citations
TL;DR: In this article, a compilation of the studies assessing the inhibitory effects of different wastewater pollutants towards anammox activity is presented, including antibiotics, aromatics, azoles, surfactants, microplastics, organic solvents, humic substances, biodegradable organic matter, or metallic nanoparticles.
27 citations
TL;DR: In this paper , NH2OH addition (HA) and bio-augmentation (BA) tactics on start-up and operation performance of DEAMOXs (R1 and R2) under ambient temperature (11.3-31.7 °C).
19 citations
TL;DR: In this article, NH2OH addition (HA) and bio-augmentation (BA) tactics on start-up and operation performance of DEAMOXs (R1 and R2) under ambient temperature (11.3-31.7°C).
19 citations
TL;DR: In this article, a Spiral Symmetry Stream Anaerobic Bioreactor (SSSAB) and an air-lift external circulation vortex enhancement nitrogen removal fluidized bed bioreactor were used for polyacrylate containing wastewater (PCW) degradation.
12 citations
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TL;DR: The physiology of anaerobic ammonium oxidizing (anammox) aggregates grown in a sequencing batch reactor was investigated quantitatively and the anammox process was completely inhibited by nitrite concentrations higher than 0.1 g of nitrogen per liter.
Abstract: The physiology of anaerobic ammonium oxidizing (anammox) aggregates grown in a sequencing batch reactor was investigated quantitatively. The physiological pH and temperature ranges were 6.7 to 8.3 and 20 to 43°C, respectively. The affinity constants for the substrates ammonium and nitrite were each less than 0.1 mg of nitrogen per liter. The anammox process was completely inhibited by nitrite concentrations higher than 0.1 g of nitrogen per liter. Addition of trace amounts of either of the anammox intermediates (1.4 mg of nitrogen per liter of hydrazine or 0.7 mg of nitrogen per liter of hydroxylamine) restored activity completely.
1,274 citations
TL;DR: A super high-rate performance with nitrogen removal rate (NRR) of 74.3-76.7 kg-N m(-3) day(-1) was accomplished in the lab-scale ANAMMOX UASB reactors, which was 3 times of the highest reported value.
503 citations
TL;DR: In this article, a MIL-101(Fe)/g-C3N4 heterojunction was synthesized via in-situ growth of MIL- 101(Fe) onto g-C 3N4 surface and applied as a bifunctional photocatalyst for simultaneous reduction of Cr(VI) and degradation of BPA under visible light.
Abstract: Heterostructured composites with an excellent photocatalytic activity have attracted increasing attention because of their great application in environmental remediation. Herein, a MIL-101(Fe)/g-C3N4 heterojunction was synthesized via in-situ growth of MIL-101(Fe) onto g-C3N4 surface. The heterojunctions were applied as a bifunctional photocatalyst for simultaneous reduction of Cr(VI) and degradation of bisphenol-A (BPA) under visible light and exhibited an obvious enhancement in photocatalytic performance compared with MIL-101(Fe) or g-C3N4. The improved activity could be attributed to the enhanced light absorption and efficient charge carrier separation by forming a direct Z-scheme heterojunction with appropriate band alignment between MIL-101(Fe) and g-C3N4. The radical trapping and electron spin resonance showed that photo-generated electrons are responsible for the reduction of Cr(VI) and BPA degradation, following an oxygen-induced pathway. This work provides new insight into the construction of metal-free semiconductor/MOFs heterojunctions as a bifunctional visible-light-driven photocatalyst for efficient and simultaneous treatment of multiple toxic pollutants in water.
257 citations
TL;DR: The present work reviews in a critical way the published literature on chromium effects on activated sludge, and on the operation of wastewater treatment plants, and concludes that clear conclusions cannot be derived about the critical chromium concentrations that affectactivated sludge growth.
200 citations
TL;DR: Metagenomic analysis indicated that Cr(VI) feeding posed no obvious effect on the overall function of the bacterial community, but altered the abundance of specific denitrifying genes, which was evidenced by quantitative real time PCR.
176 citations