Optimizing the Step-Feed Ratio and Modeling the Effluents of Aerobic Tank with ASM1 in ECOSUNIDE Process

2012 ◽  
Vol 178-181 ◽  
pp. 526-530
Author(s):  
Ruo Gu Li ◽  
Yan Qiu Zhang
Keyword(s):  
Organic Matter ◽  
Activated Sludge ◽  
Ammonia Nitrogen ◽  
Feed Ratio ◽  
Optimum Ratio ◽  
Matlab Simulink ◽  
Activated Sludge Model ◽  
Model Based ◽  
Autotrophic Bacteria ◽  
Optimum Model

The step feed model based on the Activated Sludge Model No.1 (ASM1) and the optimum model of the ammonia nitrogen (SNH) removal in wastewater were established. Four aeration tanks under the different step feed ratios were simulated by Matlab Simulink. The results show that single-feeding is conducive to the removal of readily biodegradable substrate (SS) and the growth of heterotrophic organisms (XBH), and to lower the biodegradable substrate (XS) at the same time. The SS, XS, and SNH concentrations are 1.36, 5.98, and 3.02 mg/L respectively in effluent. However, the step-feeding is conducive to the SNH removal, and the autotrophic bacteria (XBA) growth. Under the step feed ratio (25/25/25/25%), the SS, XS, and SNH concentrations are 2.64, 10.79, and 2.61 mg/L respectively. Under the optimum ratio (28.7/23.6/20.4/27.2%), step-feeding could further facilitate the removal of SNH and hinder the removal of organic matter, their concentrations are 2.70, 10.98, and 2.47 mg/L respectively.

Application of Activated Sludge Model No. 3 for the Modeling of Organic Matter Biodegradation at Thermophilic Temperatures

2007 ◽  
Vol 79 (5) ◽  
pp. 554-560 ◽  
Author(s):  
Róbert Kovács ◽  
Zsolt Csikor ◽  
Ferenc Házi ◽  
Pál Miháltz
Keyword(s):  
Organic Matter ◽  
Activated Sludge ◽  
Activated Sludge Model

A process and model concept for microbial wastewater transformations in gravity sewers

1998 ◽  
Vol 37 (1) ◽  
pp. 233-241 ◽  
Author(s):  
T. Hvitved-Jacobsen ◽  
J. Vollertsen ◽  
P. H. Nielsen
Keyword(s):  
Organic Matter ◽  
Activated Sludge ◽  
Conceptual Model ◽  
Model Concept ◽  
Aerobic Conditions ◽  
Anaerobic Processes ◽  
Activated Sludge Model ◽  
Microbial System ◽  
Gravity Sewer ◽  
Further Development

A fundamental and conceptual description of the microbial system in sewers in terms of wastewater organic matter transformations is presented. The description is examplified being under gravity sewer conditions and a conceptual model including main aerobic transformations is shown. The conceptual model of the microbial system basically agrees with the activated sludge model, (Henze et al., 1987). The model can be extended, e.g. to include anaerobic processes and processes taking place in resuspended sewer sediments under aerobic conditions. The concept for modelling transformations of wastewater during transport in sewers is recommended as the basis for further development.

Activated Sludge Model-Based Modeling of Membrane Bioreactor Processes

2011 ◽  
pp. 305-327
Author(s):  
A. Fenu ◽  
C. Thoeye ◽  
G. Guglielmi ◽  
J. Jimenez ◽  
M. Spèrandio ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Membrane Bioreactor ◽  
Activated Sludge Model ◽  
Model Based

Optimizing Nitrogen Removal Reactor Configurations by On-Site Calibration of the IAWPRC Activated Sludge Model

1992 ◽  
Vol 25 (6) ◽  
pp. 105-123 ◽  
Author(s):  
A. Lesouef ◽  
M. Payraudeau ◽  
F. Rogalla ◽  
B. Kleiber
Keyword(s):  
Growth Rate ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Growth Rates ◽  
Suspended Solids ◽  
Full Scale ◽  
Autotrophic Growth ◽  
Activated Sludge Model ◽  
Autotrophic Bacteria ◽  
Model Predictions

This paper describes a modified version of the IAWPRC model and the techniques used to calibrate it on site. Growth rate of autotrophic bacteria and the inert wastewater fractions were measured by simple methods, both in laboratory pilots and on full scale. Model predictions were compared to full scale results in large plants (> 100 000 P E). Measured autotrophic growth rates ranged from 0.3 to 0.65 1/d, depending on wastewater toxicity. Most model constants compared well with original IAWPRC proposals, and several wastewater types were identified. Parameters to establish a suspended solids balance are given. Different configurations of plants for nitrogen removal were investigated, including conventional recirculation, sludge reaeration (RDN) and step feed alternate zone denitrification.

scholarly journals NH3-N and COD Reduction in Endek (Balinese Textile) Wastewater by Activated Sludge under Different DO Condition with Ozone Pretreatment

2021 ◽  
Vol 18 (6) ◽  
Author(s):  
I Wayan Koko SURYAWAN ◽  
Gita PRAJATI ◽  
Anshah Silmi AFIFAH ◽  
Muhammad Rizki APRITAMA
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Oxygen Demand ◽  
Textile Wastewater ◽  
Degradation Process ◽  
Ammonia Nitrogen ◽  
Cod Reduction ◽  
Nitrogen Levels ◽  
Ozone Pretreatment

Nitrogen and organic matter are part of the pollutant causing eutrophication in freshwater. Textiles industry like Endek is the main source of Nitrogen and organic matter. Tis paper aims to know the degradation process of Ammonia-Nitrogen (NH3-N) and Chemical Oxygen Demand (COD) with ozone pretreatment in operated by different DO level activated sludge. There are 2 scenarios of treatments in this study: with ozone pretreatment (R1) and without ozone pretreatment (R2). Wastewater treatment began with the seeding and acclimatization process. This acclimatization study showed the efficiency degradation of NH3-N and COD by 17.7 and 27.5 %. Biological Oxygen Demand (BOD)/COD level increased with ozone pretreatment, from 0.25 to 0.38, COD/TKN level stated at 3.26. Ozone pretreatment reduced NH3-N and COD by 23.8 and 34.1 %. Wastewater treatment with activated sludge operated by different DO levels showed efficiency of 44.2 % (R1) and 68.2 % (R2). This ammonia elimination was capable of preventing eutrophication in the waterbody. The efficiency of NH3-N and Nitrogen organic degradation was indicated by TKN (Total Kjeldahl Nitrogen) levels: 87 % (R1) and 79 % (R2). The concentration of Nitrate (NO3-N) increased from 2.9 to 5.5 mg/L when DO reached 1 - 3 mg/L. COD reduction levels in this study were 17 % (R1) and 42.5 % (R2). Ozone pretreatment could make the efficiency of wastewater treatment qualified into standard quality.

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