The Experts below are selected from a list of 59709 Experts worldwide ranked by ideXlab platform
J Weerapakkaroon - One of the best experts on this subject based on the ideXlab platform.
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advanced sewage treatment Process with excess Sludge reduction and phosphorus recovery
Water Research, 2005Co-Authors: Wilasinee Saktaywin, Hiroshi Tsuno, Hideaki Nagare, T Soyama, J WeerapakkaroonAbstract:Abstract An advanced sewage treatment Process has been developed, in which excess Sludge reduction by ozonation and phosphorus recovery by crystallization Process are incorporated to a conventional anaerobic/oxic (A/O) phosphorus removal Process. The mathematical model was developed to describe the mass balance principal at a steady state of this Process. Sludge ozonation experiments were carried out to investigate solubilization characteristics of Sludge and change in microbial activity by using Sludge cultured with feed of synthetic sewage under A/O Process. Phosphorus was solubilized by ozonation as well as organics, and acid-hydrolyzable phosphorus (AHP) was the most part of solubilized phosphorus for phosphorus accumulating organisms (PAOs) containing Sludge. At solubilization of 30%, around 70% of Sludge was inactivated by ozonation. The results based on these studies indicated that the proposed Process configuration has potential to reduce the excess Sludge production as well as to recover phosphorus in usable forms. The system performance results show that this system is practical, in which 30% of solubilization degree was achieved by ozonation. In this study, 30% of solubilization was achieved at 30 mg O3/g SS of ozone consumption.
John T Novak - One of the best experts on this subject based on the ideXlab platform.
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disruption of cell to cell communication in the aeration unit of a cannibal Process Sludge reduction efficiency and related mechanisms
Biochemical Engineering Journal, 2018Co-Authors: Moslem Salehiziri, Hasan Amini Rad, John T NovakAbstract:Abstract The Cannibal Process is a commercial method for excess Sludge reduction in activated Sludge plants with small sizes. However, the relatively low efficiency in Sludge reduction (up to 50%) for some plants is the main impediment to its more widespread adoption. This study provides a biological method for upgrading Cannibal Process. The suggested method includes disruption of cell to cell communication between bacterial communities in aerobic flocs in order to increase endogenous respiration. A quorum quenching (QQ) agent is applied in the aerobic tank in order to increase the free bacteria population, which leads to enhanced microbial predation and a decrease in extracellular polymeric substances. The Sludge production yield (Yobs) of three pilots including a control sequencing batch reactor (SBR), a Cannibal system, and a QQ-Cannibal system was 0.5, 0.38, and 0.29, respectively. The results of a respirometery study also indicated that enhanced endogenous respiration caused Sludge reduction in the QQ-Cannibal pilot system.
Yu Liu - One of the best experts on this subject based on the ideXlab platform.
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Chemically reduced excess Sludge production in the activated Sludge Process.
Chemosphere, 2003Co-Authors: Yu LiuAbstract:Abstract Excess Sludge production from wastewater biological treatment Process is highly, and the disposal of excess Sludge will be forbidden in a near future, thus increased attention has been turned to look into potential technology for Sludge reduction. Recently, some novel Sludge reduction techniques have been developed based on chemical oxidation and metabolic uncoupling. This paper attempts to review those chemical-assisted Sludge reduction Processes, including Sludge alkaline–thermal treatment, activated Sludge-ozonation Process, chlorination-combined activated Sludge Process, Sludge reduction by metabolic uncouplers and high dissolved oxygen activated Sludge Process. In these combined activated Sludge Processes, excess Sludge production can be reduced up to 100% without significant effect on Process efficiency and stability. This paper would be useful when one is looking for appropriate environmentally and economically acceptable solutions for reducing or minimizing excess Sludge production from wastewater biological treatment Process.
Wilasinee Saktaywin - One of the best experts on this subject based on the ideXlab platform.
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advanced sewage treatment Process with excess Sludge reduction and phosphorus recovery
Water Research, 2005Co-Authors: Wilasinee Saktaywin, Hiroshi Tsuno, Hideaki Nagare, T Soyama, J WeerapakkaroonAbstract:Abstract An advanced sewage treatment Process has been developed, in which excess Sludge reduction by ozonation and phosphorus recovery by crystallization Process are incorporated to a conventional anaerobic/oxic (A/O) phosphorus removal Process. The mathematical model was developed to describe the mass balance principal at a steady state of this Process. Sludge ozonation experiments were carried out to investigate solubilization characteristics of Sludge and change in microbial activity by using Sludge cultured with feed of synthetic sewage under A/O Process. Phosphorus was solubilized by ozonation as well as organics, and acid-hydrolyzable phosphorus (AHP) was the most part of solubilized phosphorus for phosphorus accumulating organisms (PAOs) containing Sludge. At solubilization of 30%, around 70% of Sludge was inactivated by ozonation. The results based on these studies indicated that the proposed Process configuration has potential to reduce the excess Sludge production as well as to recover phosphorus in usable forms. The system performance results show that this system is practical, in which 30% of solubilization degree was achieved by ozonation. In this study, 30% of solubilization was achieved at 30 mg O3/g SS of ozone consumption.
Moslem Salehiziri - One of the best experts on this subject based on the ideXlab platform.
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disruption of cell to cell communication in the aeration unit of a cannibal Process Sludge reduction efficiency and related mechanisms
Biochemical Engineering Journal, 2018Co-Authors: Moslem Salehiziri, Hasan Amini Rad, John T NovakAbstract:Abstract The Cannibal Process is a commercial method for excess Sludge reduction in activated Sludge plants with small sizes. However, the relatively low efficiency in Sludge reduction (up to 50%) for some plants is the main impediment to its more widespread adoption. This study provides a biological method for upgrading Cannibal Process. The suggested method includes disruption of cell to cell communication between bacterial communities in aerobic flocs in order to increase endogenous respiration. A quorum quenching (QQ) agent is applied in the aerobic tank in order to increase the free bacteria population, which leads to enhanced microbial predation and a decrease in extracellular polymeric substances. The Sludge production yield (Yobs) of three pilots including a control sequencing batch reactor (SBR), a Cannibal system, and a QQ-Cannibal system was 0.5, 0.38, and 0.29, respectively. The results of a respirometery study also indicated that enhanced endogenous respiration caused Sludge reduction in the QQ-Cannibal pilot system.