Roles of EDTA washing and Ca(2+) regulation on the restoration of anammox granules inhibited by copper(II)

Journal of Hazardous Materials
Zheng-Zhe ZhangRen-Cun Jin

Abstract

We investigated the feasibility of using ethylene diamine tetraacetic acid (EDTA) washing followed by Ca(2+) enhancement for the recovery of anammox reactors inhibited by Cu(II). Kinetic experiments and batch activity assays were employed to determine the optimal concentration of EDTA and washing time; and the performance and physiological dynamics were tracked by continuous-flow monitoring to evaluate the long-term effects. The two-step desorption process revealed that the Cu in anammox granules was primarily introduced via adsorption (approximately, 80.5%), and the portion of Cu in the dispersible layer was predominant (accounting for 71.1%). Afterwards, the Cu internalized in the cells (approximately, 14.7%) could diffuse out of the cells and be gradually washed out of the reactor over the next 20 days. The Ca(2+) addition that followed led to an accelerated nitrogen removal rate recovery slope (0.1491kgNm(-3)d(-2)) and a normal biomass growth rate (0.054d(-1)). The nitrogen removal rate returned to normal levels within 90 days and gradual improvements in granular characteristics were also achieved. Therefore, this study provides a new insight that externally removing the adsorbed heavy metals followed by internally repairin...Continue Reading

References

Jul 28, 1999·Applied Microbiology and Biotechnology·D H Nies
May 2, 2001·Water Research·D J Batstone, J Keller
Feb 6, 2002·Trends in Microbiology·Jan MichielsJos Vanderleyden
Jul 27, 2002·Environmental Science & Technology·Zhiqiang HuBarth F Smets
Mar 15, 2003·Environmental Science & Technology·Zhiqiang HuBarth F Smets
Jan 26, 2006·Biotechnology and Bioengineering·Guo-Ping ShengXiao-Yan Li
Sep 9, 2008·Environmental Pollution·Zeli ZouXinde Cai
Feb 28, 2009·Critical Reviews in Biochemistry and Molecular Biology·Mike S M JettenHuub J M Op den Camp
May 26, 2009·Biotechnology Advances·Xian-Wei LiuHan-Qing Yu
Oct 29, 2009·Applied Microbiology and Biotechnology·Wouter R L van der StarMark C M van Loosdrecht
Aug 31, 2010·Water Research·Chong-Jian TangJian-Wei Chen
Mar 29, 2011·Journal of Hazardous Materials·Tingting ChenQaisar Mahmood
May 17, 2012·Biodegradation·Guang Feng Yang, Ren Cun Jin
Feb 26, 2013·Journal of Hazardous Materials·Chong-Jian TangXiao-Bo Min
Jul 3, 2013·Bioresource Technology·Sitong LiuJinren Ni
Mar 19, 2014·Water Research·Susanne LacknerMark C M van Loosdrecht
Jun 14, 2014·Environmental Science & Technology·Tommaso LottiMark C M van Loosdrecht
Aug 12, 2014·Water Research·José M Carvajal-ArroyoJim A Field

❮ Previous
Next ❯

Citations

Sep 11, 2016·Journal of Hazardous Materials·Qian-Qian ChenRen-Cun Jin
Apr 12, 2017·Journal of Hazardous Materials·Zheng-Zhe ZhangRen-Cun Jin

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.