Fate of estrogens in a pilot-scale step-feed anoxic/oxic wastewater treatment system controlling by nitrogen and phosphorus removal

2018 ◽  
Vol 25 (13) ◽  
pp. 12981-12991 ◽  
Author(s):  
Qingcai Chen ◽  
Zebing Li ◽  
Xiaoyu Hua
2015 ◽  
Vol 32 (4) ◽  
pp. 340-352 ◽  
Author(s):  
Syed I. Hussain ◽  
David W. Blowes ◽  
Carol J. Ptacek ◽  
Julia H. Jamieson-Hanes ◽  
Brent Wootton ◽  
...  

2011 ◽  
Vol 63 (10) ◽  
pp. 2138-2142 ◽  
Author(s):  
X. S. Kang ◽  
C. Q. Liu ◽  
B. Zhang ◽  
X. J. Bi ◽  
F. Zhang ◽  
...  

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.


2018 ◽  
Vol 53 ◽  
pp. 04028
Author(s):  
Shoubin Zhang ◽  
Wei Sun ◽  
Wenhai Jiao ◽  
Liping Qiu ◽  
Jingxiu Zhong ◽  
...  

To meet the more strict discharging standard, some combined processes have emerged to realize denitrification and phosphorus removal of wastewater more efficiently. Among them, AAO-BAF combined process was an efficient one. The AAO-BAF system was composed of AAO reactor and BAF. The AAO process was the main unit to complete phosphorus removal and denitrification. The BAF process, external nitrification unit, was mainly used to provide enough electron acceptor for denitrifying bacteria in AAO reactor, which could enhance the efficiency of denitrification of the whole system. So the system optimizing was essential to AAO-BAF combined process. In this paper, the research progress of AAO-BAF wastewater treatment system was summarized and some system optimizing methods were raised too.


2010 ◽  
Vol 62 (2) ◽  
pp. 223-230 ◽  
Author(s):  
Matthias Zessner ◽  
Christoph Lampert ◽  
H. Kroiss ◽  
S. Lindtner

This paper investigates the costs of wastewater treatment (including sludge management) within the Danube catchment countries A, CZ, SK, HU, SL, RO, BG and UA. TK is considered as well. Additionally, the paper compares the total costs of wastewater management (including sewerage) with the incomes in the different countries. The annual costs of wastewater treatment in Austria are about 30 €/p.e. y for large plants with nitrogen and phosphorus removal. In low income countries of the Danube and Black Sea catchment areas they are at a maximum 30% lower than in Austria. However, the incomes in countries like Bulgaria, Romania or Ukraine are 85% to 90% lower. The total annual costs for wastewater management (sewer development plus treatment) amount at least to 90€/p.e. y. Considering the level of income in those countries, financing of wastewater management completely by charges of the population equivalents connected is not feasible. Therefore other approaches for financing wastewater treatment are required.


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