Enhancing simultaneous removal of nitrogen and phosphorus from municipal wastewater by Fe–Cu shavings

Water problems have to be solved in an integrated way, and sustainability has become a major issue. For this reason, developing more sustainable wastewater treatment processes is needed. New discoveries and good understanding on microbial conversions of nitrogen and phosphorus make more sustainable processes possible. New options for decentralized sustainable sanitation are generally compared to conventional sewage systems, we think that for a proper comparison also innovative centralized treatment schemes should be evaluated. In this article, a more sustainable WWTP is proposed for municipal wastewater treatment, mainly based on the principles of denitrifying dephosphatation and anaerobic ammonium oxidation (ANAMMOX). The proposed system consists of a first stage of the A/B process in which maximal sludge production is achieved. In this way, COD is regained as sludge for methanation. The following BCFS® and CANON processes can remove N and P with minimal or no COD need. As a potential fertiliser, struvite can easily be removed from the sludge water by adding magnesium compounds. A case study is done on the basis of the mass balance over the proposed plant. The effluent from the system has a good quality to be recycled. This could also make a contribution to meeting the world's water needs and lessening the impact on the world's water environment. Since all the separate units are already applied or tested on pilot-scale, no problems for technical implementation are foreseen.

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Simultaneous removal of nitrogen and phosphorus in a two-biofilter system

Water Science & Technology ◽

10.2166/wst.2000.0249 ◽

2000 ◽

Vol 41 (12) ◽

pp. 101-106 ◽

Cited By ~ 6

Author(s):

D. Pak ◽

W. Chang

Keyword(s):

Retention Time ◽

Phosphorus Removal ◽

Hydraulic Retention Time ◽

Loading Rate ◽

Aerobic Condition ◽

Nitrogen Loading ◽

Simultaneous Removal ◽

Nitrogen And Phosphorus ◽

Nitrogen And Phosphorus Removal ◽

Factors Affecting

A two-biofilter system operated under alternate conditions of anaerobic/aerobic was tested to simultaneously remove nitrogen and phosphorus from sewage. The factors affecting simultaneous removal of nitrogen and phosphorus by the two-biofilter system were investigated. Those factors appeared to be influent COD/T-N and COD/T-P ratio, nitrogen loading rate and hydraulic retention time. Nitrite and nitrate produced in the biofilter in aerobic condition affected phosphorus removal by the two-biofilter system. The amount of biomass wasted during the backwash procedure also affected total nitrogen and phosphorus removal by the system.

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Full-Scale Implementation of a Vertical Membrane Bioreactor for Simultaneous Removal of Organic Matter and Nutrients from Municipal Wastewater

Improving Urban Environments ◽

10.1201/b20723-17 ◽

2016 ◽

pp. 197-210

Keyword(s):

Organic Matter ◽

Membrane Bioreactor ◽

Municipal Wastewater ◽

Full Scale ◽

Simultaneous Removal

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Enhanced performance of simultaneous carbon, nitrogen and phosphorus removal from municipal wastewater in an anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) system by alternating the cycle times

Bioresource Technology ◽

10.1016/j.biortech.2020.122750 ◽

2020 ◽

Vol 301 ◽

pp. 122750 ◽

Cited By ~ 6

Author(s):

Shuli Liu ◽

Glen T. Daigger ◽

Bingtao Liu ◽

Weiyan Zhao ◽

Jing Liu

Keyword(s):

Phosphorus Removal ◽

Sequencing Batch Reactor ◽

Municipal Wastewater ◽

Batch Reactor ◽

Nitrogen And Phosphorus ◽

Nitrogen And Phosphorus Removal ◽

Cycle Times

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Development of biofilm on geotextile in a new multi-zone wastewater treatment system for simultaneous removal of COD, nitrogen and phosphorus

Bioresource Technology ◽

10.1016/j.biortech.2011.12.034 ◽

2012 ◽

Vol 107 ◽

pp. 78-86 ◽

Cited By ~ 16

Author(s):

Mahmood Alimahmoodi ◽

Laleh Yerushalmi ◽

Catherine N. Mulligan

Keyword(s):

Wastewater Treatment ◽

Treatment System ◽

Simultaneous Removal ◽

Nitrogen And Phosphorus ◽

Wastewater Treatment System

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Application of reversed A2/O process on removing nitrogen and phosphorus from municipal wastewater in China

Water Science & Technology ◽

10.2166/wst.2011.340 ◽

2011 ◽

Vol 63 (10) ◽

pp. 2138-2142 ◽

Cited By ~ 8

Author(s):

X. S. Kang ◽

C. Q. Liu ◽

B. Zhang ◽

X. J. Bi ◽

F. Zhang ◽

...

Keyword(s):

Wastewater Treatment ◽

Wastewater Treatment Plant ◽

Phosphorus Removal ◽

Municipal Wastewater ◽

Treatment Plant ◽

Practical Application ◽

Nitrogen And Phosphorus ◽

Nitrogen And Phosphorus Removal ◽

New Process ◽

Technical Features

The application of reversed A2/O process in practice in China is mainly discussed in this paper. As a new process on nitrogen and phosphorus removal, principle and technical features of reversed A2/O process are also summarized. The application in rebuilt wastewater treatment plant shows that reversed A2/O process not only has merits on high nitrogen and phosphorus removal efficiency, but also has merits on energy saving. The application in newly-build wastewater treatment plant shows that infrastructure and equipment investment of reversed A2/O process economized 15% and 10% respectively, compared to conventional A2/O process. The practical application shows that reversed A2/O process is a new nitrogen and phosphorus removal process, which is suitable for China's national conditions.

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Isolation and identification of an aerobic denitrifying phosphorus removing bacteria and analysis of the factors influencing denitrification and phosphorus removal

Water Science & Technology ◽

10.2166/wst.2018.514 ◽

2018 ◽

Vol 78 (11) ◽

pp. 2288-2296 ◽

Cited By ~ 3

Author(s):

Hongying Xu ◽

Ru Jin ◽

Chan Zhang ◽

Yupeng Wu ◽

Xiaohui Wang

Keyword(s):

Escherichia Coli ◽

16S Rdna ◽

Removal Efficiency ◽

Phosphorus Removal ◽

Municipal Wastewater ◽

Screening Method ◽

Treatment Plant ◽

Effect Of Temperature ◽

Nitrogen And Phosphorus ◽

Isolation And Identification

Abstract Excessive emission of plant nutrients (such as nitrogen and phosphorus) into the water body can induce eutrophication. Therefore, how to control eutrophic water efficiently and economically is very important. In the paper, highly efficient aerobic denitrifying phosphorus removing J16 bacteria was isolated from the activated sludge of an aerobic bioreactor in Taiyuan municipal wastewater treatment plant by using the blue–white spot screening method, an aerobic phosphorus absorption test, nitrate reduction test, nitrogen removal experiments, and plate coating and streaking methods. Through 16S rDNA gene homology comparison and physiological and biochemical identification, the J16 strain was preliminarily identified as Escherichia coli, with a sequence similarity of 99%. The 16S rDNA sequence of strain J16 was submitted to GenBank (accession number: MF667015). The effect of temperature, pH, percentage of inoculum and phosphate-P (PO43−-P) concentration on denitrification and phosphorus removal efficiency was investigated through a single-factor experiment. The optimum conditions of the J16 strain for denitrification and phosphorus removal were as follows: 30°C, neutral or weak alkaline (pH: 7.2–8), and 3% of inoculum, respectively. The denitrification and phosphorus removal efficiency of strain J16 was the highest when PO43−-P and nitrate-N(NO3−-N) concentrations were 8.9 and 69.31 mg/L, and the removal were 96.03% and 94.55%, respectively. In addition, strain J16 could reduce phosphoric acid to phosphine (PH3) and remove some phosphorus under hypoxia conditions. This is the first study to report the involvement of Escherichia coli in nitrogen and phosphorus removal under aerobic and hypoxia conditions. Based on the above results, the strain J16 can effectively remove nitrogen and phosphorus, and will be utilized in enhancing treatment of nitrogen and phosphorus-containing industrial wastewater and phosphorus reclamation.

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Phosphorus and Nitrogen Removal in Moving-Bed Sequencing Batch Biofilm Reactors

Water Science & Technology ◽

10.2166/wst.1999.0589 ◽

1999 ◽

Vol 40 (4-5) ◽

pp. 169-176 ◽

Cited By ~ 28

Author(s):

Giuseppe Pastorelli ◽

Roberto Canziani ◽

Luca Pedrazzi ◽

Alberto Rozzi

Keyword(s):

Organic Carbon ◽

Nitrogen Removal ◽

Municipal Wastewater ◽

Phosphorus Uptake ◽

Biofilm Reactor ◽

Municipal Wastewater Treatment ◽

Biological Phosphorus Removal ◽

Nitrogen And Phosphorus ◽

Limit Values ◽

Moving Bed

A pilot moving-bed sequencing batch biofilm reactor (MBSBBR) fed with primary settled wastewater, was used in order to study organic carbon, phosphorus and nitrogen removal with and without external carbon sources. Patented KMT® polyethylene biofilm carriers were used. Organic carbon uptake and phosphorus release has been achieved in the anaerobic phase of the cycle, while nitrification, simultaneous denitrification (i.e., anoxic respiration of sequestered COD in the inner layer of the biofilm) and phosphorus uptake was observed in the aerobic phase. A stable biological phosphorus removal could be achieved only with an external carbon source. Since the process proved flexible and reliable, it is suitable for full scale application to municipal wastewater treatment plants (WWTPs), in order to meet EU total nitrogen and phosphorus limit values for discharge into sensitive receiving waters.

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