activated sludge process Articles
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Revamp of 100 KLD STP at EROS Hotels - Case Study
Transchip3.0 High Performance High Surface Area MBBR Media Installation at – EROS Hotel STP, Delhi Influent Parameters Flow - 100 KLD Bod – 700 ppm Cod – 2000 ppm Previous treatment : Activated Sludge ...
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New dimensiong guideline and standard for the activated sludge process
Since June 2016 a new standard for the design of activated sludge systems is valid. The most significant point is the change of the basic value from BOD to COD. The standard is also the basis for designing SBR-systems. The article discusses main aspects of the new design basis and how AQUA DESIGNER has been modified and adapted to this. In AQUA DESIGNER you can calculate the continuous and ...
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Advanced respirometry for activated sludge process
Introduction Respirometry is the measurement and interpretation of the biological oxygen consumption rate under well defined experimental conditions. Because oxygen consumption is directly associated with both biomass growth and substrate removal, respirometry is a very useful technique for monitoring, modeling and control of the activated sludge process The Respirometry technology is a well ...
By SURCIS, S.L.
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OUR Set-Point Control of Activated Sludge Processes
The OUR Set-Point method is useful for controlling the activity and loading-rate capacity of an activated sludge mixed liquor. In this case, sufficient amounts of a stock substrate are added to a mixed liquor suspension to provide kinetic saturation with subsequent measure of OUR. Once an acceptable substrate is found for a specific wastewater treatment plant, an OUR can be identified that ...
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Decomposition and biodegradability enhancement of textile wastewater using a combination of electron beam irradiation and activated sludge process
The research conducted a study on decomposition and biodegradability enhancement of textile wastewater using a combination of electron beam irradiation and activated sludge process. The purposes of this research are to remove pollutant through decomposition and to enhance the biodegradability of textile wastewater. The wastewater is treated using electron beam irradiation as a pre-treatment ...
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Applications of the deep-shaft activated sludge process in wastewater treatment
The deep-shaft activated sludge process is a unique modification of the activated sludge system. The main objective of this system is to increase the amount of dissolved oxygen available for biological activity. This can be achieved by increasing the rate of oxygen transfer from the gas phase to the liquid phase. The deep-shaft configuration increases the partial pressure of oxygen, thereby ...
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The occurrence of enhanced biological phosphorus removal in a 200,000 m3/day partial nitration and Anammox activated sludge process at the Changi water reclamation plant, Singapore
Mainstream partial nitritation and Anammox (PN/A) has been observed and studied in the step-feed activated sludge process at the Changi water reclamation plant (WRP), which is the largest WRP (800,000 m3/d) in Singapore. This paper presents the study results for enhanced biological phosphorus removal (EBPR) co-existing with PN/A in the activated sludge process. Both the in-situ EBPR ...
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Respirometry study about the olive oil effects in the activated sludge process case study
The problem of Oils in the Activated Sludge Process In many activated sludge plants excessive oils discharges can give rise to Nocardia foaming which causes major operational problems. While the bulk of the oils are removed in Dissolved Air Flotation (DAF) units or grease interceptors the remainder must be treated in the wastewater treatment system. But however, in case of high concentration, ...
By SURCIS, S.L.
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Influence of reactor configuration on reliability of activated sludge process
The effect of uncertainty in system parameters and the accuracy of the mathematical model used on the design and reliability of the activated sludge process is investigated by Monte Carlo simulations. Simulations indicate that the coefficient of variation for a reactor volume varies from 0.56 for a single mixed tank reactor to 0.44 for a plug flow reactor. The coefficient of variation for ...
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Biodegradation of Cypermethrin by pseudomonas in a batch activated sludge process
The biodegradation of Cypermethrin (20 to 125 mg/L) in an effluent using batch activated sludge was studied. Degradation was found to occur to a great extent only in the presence of Pseudomonas (IES-Ps-1) culture. Under aerobic conditions using mechanical aerators, Cypermethrin (20 mg/L) was almost completely degraded in just over 48 h at ambient temperature. Further loading of organic compound ...
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Energy-efficient mixers for the activated sludge process
Approximately 70% of the total energy demand of a water or wastewater treatment plant is consumed specifically for the mixing and aeration systems in the activated sludge process. In view of that it is becoming increasingly important to use systems that deal with resources in a responsible way. HYPERCLASSIC® -Mixer – the hyperboloid mixing technologyINVENT made significant contributions to the ...
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Complete solids retention activated sludge process
In a slaughterhouse's full-scale extended aeration activated sludge wastewater treatment plant (WWTP), operating under complete solids retention time, the evolution of mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) concentration, food to micro-organisms ratio (F/M) and substrate utilization rate (SUR) were studied for over a year. Biomass growth phases ...
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United Utilities (U.K.) optimization of activated sludge process (ASP) - Case Study
United Utilities uses the SENTRY monitoring platform to optimize loading capacity and energy efficiency of the Activated Sludge Process. "SENTRY is quick and easy to install and boasts an intuitive dashboard to display it's graphical representation of real-time data. This has provided us with a whole new level of insight into our site performance, which our graduate team are utilising to study ...
By Sentry
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Valuation of OSA process and folic acid addition as excess sludge minimization alternatives applied in the activated sludge process
The aim of this study was to investigate the ability of the oxic-settling-anaerobic (OSA)-process and the folic acid addition applied in the activated sludge process to reduce the excess sludge production. The study was monitored during two distinct periods: activated sludge system with OSA-process, and activated sludge system with folic acid addition. The observed sludge yields (Yobs) were ...
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BM Respirometry benefits for activated sludge process management, research and training
A biological process controlled by non-biological measurements? All treatment plant efficiencies are geared to the waste that they receive. The microorganisms found in the waste need food and oxygen to survive, the food is provided as soluble organic carbon in the waste stream and the oxygen is obtained through the aeration process in the treatment plant. Once a treatment plant has been built, ...
By SURCIS, S.L.
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The application of model predictive control of ammonia nitrogen in an activated sludge process
In this paper a model predictive controller (MPC) for ammonia nitrogen is presented and evaluated in a real activated sludge process. A reduced nonlinear mathematical model based on mass balances is used to model the ammonia nitrogen in the activated sludge plant. An MPC algorithm that minimises only the control error at the end of the prediction interval is applied. The results of the ammonia ...
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Modeling of organic substrate transformation in the high-rate activated sludge process
This study describes the development of a modified activated sludge model No.1 framework to describe the organic substrate transformation in the high-rate activated sludge (HRAS) process. New process mechanisms for dual soluble substrate utilization, production of extracellular polymeric substances (EPS), absorption of soluble substrate (storage), and adsorption of colloidal substrate were ...
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Optimal design activated sludge process by means of multi-objective optimization: case study in Benchmark Simulation Model 1 (BSM1)
Optimal design of activated sludge process (ASP) using multi-objective optimization was studied, and a benchmark process in Benchmark Simulation Model 1 (BSM1) was taken as a target process. The objectives of the study were to achieve four indexes of percentage of effluent violation (PEV), overall cost index (OCI), total volume and total suspended solids, making up four cases for comparative ...
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Activated Sludge Types for Sewage & Water Treatment
Activated Sludge Types for Sewage & Water TreatmentIn the Activated Sludge Process for waste water treatment, microorganisms, including bacteria, fungi, and protozoa, are used to speed up the decomposition of organic matter requiring oxygen for treatment.The Activated Sludge name and meaning originates from the process it involves: the production of an activated mass of microorganisms capable ...
By YASA ET
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Comparison between inhibitor and uncoupler for minimizing excess sludge production of an activated sludge process
In order to study the minimization of excess sludge production, the reduction in the excess sludge production in the presence of an inhibitor and uncoupler was studied in this work. The experimental results show that such an addition could effectively reduce the production of excess sludge. With the energy uncoupling model established in this work, energy uncoupling coefficient (E u) was used to ...
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