scholarly journals The Factorial Analysis of the Activated Sludge Treatment Process Parameters

2020 ◽  
Vol 71 (5) ◽  
pp. 75-85
Author(s):  
Sanda Florentina Mihalache ◽  
Madalina Carbureanu
Keyword(s):  
Activated Sludge ◽  
Critical Infrastructure ◽  
Treatment Plant ◽  
Warning System ◽  
Principal Component ◽  
Water Treatment Plant ◽  
Data Driven ◽  
Active Sludge ◽  
Plant Operator ◽  
Highly Nonlinear

The main environmental problems comprise two main directions: air and water. Water treatment plant is a critical infrastructure, especially in large cities. The activated sludge process is a typical example of highly nonlinear system. The associated models found in literature are mainly analytical and complex. In this paper there are proposed data-driven models obtained from plant operation data. A factor reduction procedure, namely principal component analysis is used to find meaningful correlations between process measurements. The selected correlations are obtained via simple and multiple regression algorithm. The resulted models are specific to the studied plant, simpler than the analytical ones, and with sufficient accuracy if used in plant monitoring and operation. The proposed procedure of using data-driven models for inferential measuring decreases the analysis costs (even eliminating the necessity of measuring equipment). If the experience in operating the plant is used to predict parameter trends this procedure can provide a useful tool for developing a decision support system for the plant operator. A real time prediction module associated with a warning system can be applied for every active sludge process, having as condition the availability of plant operating data.

DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Dinda Rita K. Hartaja ◽  
Imam Setiadi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Appropriate Technology ◽  
Waste Water Treatment Plant ◽  
Activated Sludge Process ◽  
High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

Experiences with the World’s Largest Municipal Waste Water Treatment Plant Using Membrane Technology

2006 ◽  
Vol 1 (4) ◽  
Author(s):  
N. Engelhardt ◽  
W. Lindner
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Activated Sludge ◽  
Membrane Filtration ◽  
Anthropogenic Impacts ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Economic Point

With the commissioning of the waste water treatment plant Nordkanal, which has been dimensioned for a design capacity of 80,000 population equivalents, new worldwide standards for the implementation of large membrane-activated sludge plants have been created both from a technical and from an economic point of view. The hitherto successful operation of this plant has already now contributed towards this technology becoming suitable for use in large waste water treatment plants. The now two years the waste water treatment plant Nordkanal has been in operation have once again demonstrated that even on a large scale, membrane-activated sludge plants are able to reliably produce purified effluent of excellent quality, while simultaneously providing a small-sized design. They prove advantageous everywhere small-sized designs are sought after and the purified effluent has to meet high or special requirements. Wherever purification requirements are intensified in the foreseeable future, whether with regard to the hygienisation of effluent, or in the framework of re-using purified waste water as industrial water or potable water or in order to protect natural drinking water resources from critical anthropogenic impacts, the membrane bioreactor process or membrane filtration is trend setting and will increasingly gain in importance.

Filamentous Bulking in Massachusetts: Extent of the Problem and Case Studies

1992 ◽  
Vol 25 (4-5) ◽  
pp. 265-271 ◽  
Author(s):  
M. S. Switzenbaum ◽  
T. R. Plante ◽  
B. K. Woodworth
Keyword(s):  
Activated Sludge ◽  
Control Strategies ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Aeration Tank ◽  
Plant Operator ◽  
Filamentous Bulking ◽  
Selective Control ◽  
Plant Data ◽  
Organism Identification

A handbook has been written for control of activated sludge bulking for wastewater treatment plant operators in Massachusetts. In order to demonstrate the principles described in the handbook for filamentous organism identification and subsequent selective control, six Massachusetts activated sludge plants experiencing bulking problems were investigated. In addition, a survey was conducted to determine the extent of the filamentous bulking problem in Massachusetts. Dominant filamentous organisms in the aeration tank mixed liquor were identified to determine the probable cause of bulking problems. Plant data and operating conditions were also studied to verify the organism-cause relationship. Based on the sample and data analysis, selective control strategies were suggested to the plant operator to control or eliminate the bulking problem.

Enhancement of Capacity and Efficiency of a Biological Waste Water Treatment Plant

1999 ◽  
Vol 40 (11-12) ◽  
pp. 231-239 ◽  
Author(s):  
Nikolaus Kaindl ◽  
Ulf Tillman ◽  
Christian H. Möbius
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Activated Sludge ◽  
Water Flow ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Cod Reduction ◽  
Reduction Capacity

The capacity and efficiency of the existing activated sludge waste water treatment plant at SCA Graphic Laakirchen AG needs to be enhanced due to an expected future increase in waste water flow and COD-load. For the case of an existing upper limit of COD discharges into the river, the COD reduction rate of the waste water treatment has to be increased to a degree which is unobtainable by biodegradation only. Laboratory and pilot plant trials using a moving bed biofilm technique and an activated sludge treatment combined with ozone treatment and subsequent biofiltration have been performed with the aim to increase the COD reduction capacity and efficiency of the plant. The results show that the COD reduction capacity of the existing activated sludge plant can be increased by more than 100% by integrating a moving bed biofilm pre-treatment stage into the plant. In addition, improved sludge separation in the secondary clarifier was established. A special benefit of the ozonation plus biofilter treatment is a controllable COD reduction between 20 - 90% related to the outflow of the activated sludge plant. It is concluded that by integrating the investigated treatment techniques in the existing activated sludge plant the future increases in waste water flow and COD-Load can be handled satisfactorily without increasing bioreactor volume.

scholarly journals Cascading effects of cyber-attacks on interconnected critical infrastructure

Cybersecurity ◽  
2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Venkata Reddy Palleti ◽  
Sridhar Adepu ◽  
Vishrut Kumar Mishra ◽  
Aditya Mathur
Keyword(s):  
Water Treatment ◽  
Distribution System ◽  
Water Distribution ◽  
Critical Infrastructure ◽  
Water Distribution System ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Cyber Attacks ◽  
Physical Systems ◽  
Cascading Effects

AbstractModern critical infrastructure, such as a water treatment plant, water distribution system, and power grid, are representative of Cyber Physical Systems (CPSs) in which the physical processes are monitored and controlled in real time. One source of complexity in such systems is due to the intra-system interactions and inter-dependencies. Consequently, these systems are a potential target for attackers. When one or more of these infrastructure are attacked, the connected systems may also be affected due to potential cascading effects. In this paper, we report a study to investigate the cascading effects of cyber-attacks on two interdependent critical infrastructure namely, a Secure water treatment plant (SWaT) and a Water Distribution System (WADI).

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