Preliminary design of the activated sludge system — standard codes versus kinetic model equations

1978 ◽  
Vol 5 (1) ◽  
pp. 26-31
Author(s):  
Frederick L. Hart
Keyword(s):  
Waste Water ◽  
Kinetic Model ◽  
Biological Treatment ◽  
System Size ◽  
Aeration Tank ◽  
Domestic Waste ◽  
Design Values ◽  
Model Equations ◽  
Biological Treatment System ◽  
Model Approach

This paper discusses the origin and concepts of kinetic model equations and standard specifications used to size a biological treatment system (size of aeration tank and aeration requirements). They are shown to yield very similar calculations for a domestic type of waste water, but may yield much different values if the waste water behaves differently than domestic waste. The kinetic model approach, therefore, should be considered more flexible and superior in its ability to yield appropriate design values.

scholarly journals MODELING OF WASTEWATER TREATMENT

2021 ◽  
Author(s):  
Yu.S. Chirikanova ◽  
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Water Purification ◽  
Software Package ◽  
Biological Treatment ◽  
Aeration Tank ◽  
Biological Wastewater Treatment ◽  
Biological Treatment System

The paper deals with the problem of mathematical modeling of biological wastewater treatment. The peculiarity of the biological treatment system is that a block with activated sludge, called an aeration tank, is used for water purification. To describe the process of biological wastewater treatment in aeration tanksa mathematical model developed in the GPS-X software package is proposed.

scholarly journals Aeration Tank Microbial Aerosols as a Factor of Water Bodies’ Pollution

2017 ◽  
Author(s):  
Keyword(s):  
Wind Velocity ◽  
Biological Treatment ◽  
Water Surface ◽  
Waste Water Treatment ◽  
Water Bodies ◽  
Aeration Tank ◽  
Waste Waters ◽  
Domestic Waste ◽  
Water Losses ◽  
Microbial Pollution

Aeration impact on aerosols discharge from aeration tanks in the process of domestic waste water treatment has been considered. Waste waters and their aerosols microbial pollution has been shown. New regularities of the temperature, time, and wind velocity on moisture discharge and microbial pollution in the form of aerosols from water surface of the biological treatment aerated facilities have been obtained. The equations that enable to calculate moisture emission from water surface in the process of aeration are presented. Water losses in the form of aerosols in the process of aeration depending on the outside air temperature and wind velocity were determined theoretically and experimentally. The microorganisms specific discharge from an aeration tank equal to 2.144 г/(m2∙s) in terms of coliform species was calculated. The microbial pollution maximal concentration values for various meteorological conditions were determined for performance of standard calculations of microbial discharges with aerosols from aeration tanks. The obtained equations can be used in designing of engineering measures aimed at reduction of the discharged aerosols negative microbial impact on water bodies adjacent to the territories of domestic waste waters biological treatment facilities.

Kinetic Characteristic of Single Biological Aerated Filter (BAF) for Organics Degradation

2012 ◽  
Vol 518-523 ◽  
pp. 2562-2567
Author(s):  
Lian Ke Zhang
Keyword(s):  
Waste Water ◽  
Kinetic Model ◽  
Kinetic Characteristic ◽  
Waste Water Treatment ◽  
Biological Aerated Filter ◽  
Domestic Waste ◽  
Effluent Quality ◽  
Treatment Processes ◽  
Organic Removal ◽  
Aerated Filter

The kinetic model of organic removal in single biological aerated filter for domestic waste water treatment was established, and kinetic parameter was calibrated under certain hydraulic loadings. The results showed that organic removal efficiency was affected by the concentration of the influent COD, hydraulic loadings and the height of filter media when the reactor size was unchangeable. It is found that the model was accurate in predicting the effluent quality by the experiment and it could afford new reference evident to optimize the treatment processes.

scholarly journals Treatment of slaughterhouse wastewater using an activated sludge/contact aeration process

2003 ◽  
Vol 47 (12) ◽  
pp. 285-292 ◽  
Author(s):  
C.-K. Chen ◽  
S.-L. Lo
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Aeration Tank ◽  
Activated Sludge Process ◽  
Two Phase ◽  
Slaughterhouse Wastewater ◽  
Aeration Process ◽  
Biological Treatment System

This study combines a two-phase biological treatment system of activated sludge/contact aeration process by adding biological contact filters into the rear sector of the activated sludge aeration tank of the slaughterhouse wastewater treatment plant. This system keeps the advantages of complete mixing of substrates and microorganisms and flexible operation of the activated sludge process, and increased biological phase, less sludge, process stability and good settleability of sludge of the contact aeration process. This system could avoid the defects of sludge bulking, increased sludge production and difficult operation of the activated sludge process, and system clogging and rigid operation of the contact aeration process. Because suspended microorganisms are flowing into the contact aeration system, which then degrade or suspend within the biological contact filters after being adsorbed by the fixed biological film, on which partial bio-solids will act as seeding microorganisms. Suspended microorganisms and the dropped biological film will settled in the secondary settling tank, then reflux into the activated sludge aeration tank. The partial dropped biological film will decompose in the activated sludge aeration tank to achieve the function of decreasing sludge. Large specific gravity and good settling ability of biofilm sludge will provide better effluent quality. It has been proven through a practical experiment at a slaughterhouse wastewater treatment plant in Taiwan, that the activated sludge process effluent COD value of 150-200 mg/L and SS value of 80-100 mg/L were decreased to around 40 mg/L and 22 mg/L, respectively, after changing its system to the two-phase biological treatment system of activated sludge/contact aeration process.

Reuse of Treated Domestic Waste Water in Concrete - A Sustainable Approach

2011 ◽  
Vol 4 (4) ◽  
pp. 182-184 ◽  
Author(s):  
Prof. A.B. More Prof. A.B. More ◽  
◽  
Prof. R. B. Ghodake Prof. R. B. Ghodake ◽  
Himanshu. N. Nimbalkar ◽  
Pritam. P. Chandake ◽  
...  
Keyword(s):  
Waste Water ◽  
Domestic Waste

Savings with upgraded performance through improved activated sludge denitrification in the combined activated sludge–biofilter system of the Southpest Wastewater Treatment Plant

2008 ◽  
Vol 57 (8) ◽  
pp. 1287-1293 ◽  
Author(s):  
A. Jobbágy ◽  
G. M. Tardy ◽  
Gy. Palkó ◽  
A. Benáková ◽  
O. Krhutková ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Process Efficiency ◽  
Initial Value ◽  
Initial Profile ◽  
Biological Treatment System

The purpose of the experiments was to increase the rate of activated sludge denitrification in the combined biological treatment system of the Southpest Wastewater Treatment Plant in order to gain savings in cost and energy and improve process efficiency. Initial profile measurements revealed excess denitrification capacity of the preclarified wastewater. As a consequence, flow of nitrification filter effluent recirculated to the anoxic activated sludge basins was increased from 23,000 m3 d−1 to 42,288 m3 d−1 at an average preclarified influent flow of 64,843 m3 d−1, Both simulation studies and microbiological investigations suggested that activated sludge nitrification, achieved despite the low SRT (2–3 days), was initiated by the backseeding from the nitrification filters and facilitated by the decreased oxygen demand of the influent organics used for denitrification. With the improved activated sludge denitrification, methanol demand could be decreased to about half of the initial value. With the increased efficiency of the activated sludge pre-denitrification, plant effluent COD levels decreased from 40–70 mg l−1 to < 30–45 mg l−1 due to the decreased likelihood of methanol overdosing in the denitrification filter

Residue Desulfurization: A Kinetic Model Approach

2007 ◽  
Vol 28 (3) ◽  
pp. 383-389
Author(s):  
K. Le Lannic ◽  
I. Guibard
Keyword(s):  
Kinetic Model ◽  
Model Approach
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