scholarly journals Enrichment of Denitrifying Phosphate-accumulating Organisms in Nitrogen and Phosphorus Removal Process

2016 ◽  
Author(s):  
Zijin Qin ◽  
Liping Qiu ◽  
Shoubin Zhang ◽  
Jiabin Wang ◽  
Kang Xie
Keyword(s):  
Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Removal Process

BICT biological process for nitrogen and phosphorus removal

2004 ◽  
Vol 50 (6) ◽  
pp. 179-188
Author(s):  
Y. Huang ◽  
Y. Li ◽  
Y. Pan
Keyword(s):  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Biological Process ◽  
Synthetic Wastewater ◽  
Nitrifying Bacteria ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Attached Growth ◽  
Removal Process

An updated biological nitrogen and phosphorus removal process - BICT (Bi-Cyclic Two-Phase) biological process - is proposed and investigated. It is aimed to provide a process configuration and operation mode that has facility and good potential for optimizing operation conditions, especially for enhancing the stability and reliability of the biological nutrient removal process. The proposed system consists of an attached-growth reactor for growing autotrophic nitrifying bacteria, a set of suspended-growth sequencing batch reactors for growing heterotrophic organisms, an anaerobic biological selector and a clarifier. In this paper, the fundamental concept and operation principles of BICT process are described, and the overall performances, major operation parameters and the factors influencing COD, nitrogen and phosphorus removal in the process are also discussed based on the results of extensive laboratory experiments. According to the experimental results with municipal sewage and synthetic wastewater, the process has strong and stable capability for COD removal. Under well controlled conditions, the removal rate of TN can reach over 80% and TP over 90% respectively, and the effluent concentrations of TN and TP can be controlled below 15 mg/L and 1.0 mg/L respectively for municipal wastewater. The improved phosphorus removal has been reached at short SRT, and the recycling flow rate of supernatant between the main reactors and attached-growth reactor is one of the key factors controlling the effect of nitrogen removal.

scholarly journals Discussion on Nitrogen and Phosphorus Removal Process Characteristics of Improved Oxidation Ditch

2011 ◽  
Vol 11 ◽  
pp. 1291-1295 ◽  
Author(s):  
Shen Lian-feng ◽  
Chen Rong-ping ◽  
Zhang Fa-wen ◽  
Yang Jian-tao ◽  
Li You
Keyword(s):  
Phosphorus Removal ◽  
Oxidation Ditch ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Removal Process ◽  
Process Characteristics

New Nitrogen and Phosphorus Removal Process Development Based on Simulation

2013 ◽  
Vol 663 ◽  
pp. 958-963
Author(s):  
Chang Ming Shen ◽  
Dian Hai Yang ◽  
Guo Hua Wang
Keyword(s):  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Process Development ◽  
Domestic Wastewater ◽  
Pollutant Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Wastewater Treatment Process ◽  
Removal Process ◽  
Removal Capacity

Nitrogen and phosphorus are the nutrients induced eutrophication, therefore the removal of nitrogen and phosphorus is the main target of domestic wastewater treatment. In order to achieve better nutrient removal effect with lower construction and operation cost, a new nitrogen and phosphorus removal process was developed based on simulation. New process named MUST was developed by mixing UCT and step-feed BNR technology together, and possessed the advantages of two processes. The results of simulation show that MUST can achieve similar treating effect with 20% shorter hydraulic retention time (HRT) compared with UCT process. The influent splitting ratio of 4:3:3 was recommended for MUST operation. A pilot experiment of MUST was also carried out according to simulation results, and achieved very good pollutant remove effect, the average COD, NH4+-N, TN, TP removal efficiency were 85.4%, 94.0%, 65.1%, 62.3% respectively under the condition of low influent COD/TN ratio. Considering the excellent pollutant removal capacity of MUST, an upgrade project chose it as wastewater treatment process. This paper just starts the research of MUST, further study is necessary and valuable.

Upgrade and Operation of Nitrogen and Phosphorus Removal Process in the Sewage Treatment Plant of Jinan City

2013 ◽  
Vol 864-867 ◽  
pp. 1616-1620
Author(s):  
Lin Bo Sun ◽  
Shun Tian ◽  
Wen Juan Chen ◽  
Wei Jian Jia ◽  
Yong Lei Wang
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Phosphorus Removal ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Water Quality Improvement ◽  
Removal Process

The designed capacity of Jinan Citys wastewater treatment plant (the second sewage treatment plant) is 200,000 m3/d, and the biological treatment process is DE-type oxidation ditch process. Because of self-control requirements, equipment quality and management , alternat-ing operation of anoxia and oxygen can not be achieved. Acting in concert with the engineering of south-to-north water diversion and water quality improvement of the Xiaoqing River, water quality improvement and transformation of nitrogen and phosphorus removal process was condu-cted. By increasing the diversion wall, digestive reflux and other measures, the DE oxidat-ion ditch process was transformed into A2/O process, while the depth of V-efficiency fiber filter processing and chemical phosphorus removal process were increased. After the upgrade, the process is stable, the effluent quality reached an A standard of " discharge standard of pollutants for municipal wastewater treatment plant" (GB18918-2002).

Retrofit of biological nutrient removal process assisted by numerical simulation with activated sludge model no. 2

1996 ◽  
Vol 34 (1-2) ◽  
pp. 221-228 ◽  
Author(s):  
Gakuji Kurata ◽  
Kazushi Tsumura ◽  
Syoichiro Nakamura ◽  
Michio Kuwahara ◽  
Akio Sato ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Biological Nutrient Removal ◽  
Organic Substrates ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Removal Process ◽  
Biological Phosphorus

In existing wastewater treatment plants that employ biological nitrogen and phosphorus removal processes, a low concentration of organic substrates in the influent wastewater has a destabilizing effect on the phosphorus removal process. Many efforts have been made to combat this problem, including reconstructing the process flow and improving operation and control systems. However, because the mechanism used for biological phosphorus removal is complex, it is difficult to establish effective empirical methods. For this paper, we constructed a simulator for the wastewater treatment process and tried to improve on current procedures, focusing on the planning, execution, and evaluation of methods of retrofitting existing WWTP with equipment for biological nutrient removal. The Shinnanyo WWTP uses the anaerobic/aerobic activated sludge process to remove nitrogen and phosphorus biologically. At this plant, however, the influent wastwwater has an insufficient concentration of organic substrates, thus decreasing the efficiency of the biological phosphorus removal. An analysis of organic consumption in the reaction tank on the simulation suggested that injecting primary sludge into the reaction tank would increase the efficiency of phosphorus removal process. Full scale experiments conducted at the plant verified the efficiency of this method. In addition, by shortening the A-SRT, ensuring that nitrification is not negatively affected, the efficiency of the nitrogen and phosphorus removal was significantly improved.

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