Study of the performance of disinfection with sodium hypochlorite on a full-scale sewage treatment plant

A full-scale sewage treatment plant was investigated to assess the performance of the disinfection stage. Sodium hypochlorite was used as a disinfectant agent and the process efficiency was evaluated by E.coli removal. The research took place over a period of two years in order to evaluate the effect of retention time (t) and residual chlorine (Cr) under different seasonal conditions. The effectiveness of E.coli removal with sodium hypochlorite proved to be strictly dependent on the factor CR t (product of residual chlorine with the contact time). The regression line of the experimental points was, on the whole, well comparable with the model proposed by Collins, especially in the field of CRt lower than 30 mg L-1 min.

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Dynamic simulation of sludge blanket movements in a full-scale rectangular sedimentation basin

Water Science & Technology ◽

10.2166/wst.1996.0009 ◽

1996 ◽

Vol 33 (1) ◽

pp. 89-99 ◽

Cited By ~ 5

Author(s):

F. Göhle ◽

A. Finnson ◽

B. Hultman

Keyword(s):

Dynamic Simulation ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Simulation Studies ◽

Separation Processes ◽

Sedimentation Basin ◽

Near Future ◽

Sludge Concentration

Bromma sewage treatment plant in Stockholm is the second largest plant in Stockholm and will in the near future have requirements for nitrogen removal. This means that a higher sludge age must be used in the aeration basin. This may be accomplished by an increase of the sludge concentration up to values until the limiting solids flux is exceeded. Measurement of the sludge blanket level is a possibility for better control of the sedimentation basin. Different measurements were performed to evaluate the main factors influencing the level. Dynamic simulation studies were performed at Bromma sewage treatment plant in Stockholm of the sludge blanket level and the return sludge concentration in a full-scale sedimentation basin. The simulations were performed with the help of a Danish simulation package, EFOR (1992), in which both reactions in the aeration basin (mainly based on the IAWPRC model) and separation processes in the sedimentation basin (both clarification and thickening) can be studied. The thickening model is based on the solids flux theory and the Vesilind formula (1979). Different methods were compared for determination and use of characteristic parameters in the Vesilind formula.

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A Study on the Reduction in Total Load Capacity of Sludge at Full-scale Sewage Treatment Plant

Journal of Korean Society of Water Science and Technology ◽

10.17640/kswst.2020.28.5.13 ◽

2020 ◽

Vol 28 (5) ◽

pp. 13-23

Author(s):

Yun-Seong Choi ◽

Muhammad Yaqub ◽

Seung-Hwan Lee

Keyword(s):

Load Capacity ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Total Load

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Risk assessment of Giardia from a full scale MBR sewage treatment plant caused by membrane integrity failure

Journal of Environmental Sciences ◽

10.1016/j.jes.2014.09.033 ◽

2015 ◽

Vol 30 ◽

pp. 252-258 ◽

Cited By ~ 11

Author(s):

Yu Zhang ◽

Zhimin Chen ◽

Wei An ◽

Shumin Xiao ◽

Hongying Yuan ◽

...

Keyword(s):

Risk Assessment ◽

Sewage Treatment ◽

Membrane Integrity ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale

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Modeling of Novel Processes for Eliminating Sidestreams Impacts on Full-Scale Sewage Treatment Plant Using GPS-X7

10.21203/rs.3.rs-796128/v1 ◽

2021 ◽

Author(s):

Ahmed M. Faris ◽

Haider M. Zwain ◽

Majid Hosseinzadeh ◽

Seyed Mostafa Siadatmousavi

Keyword(s):

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Biofilm Reactor ◽

Moving Bed Biofilm Reactor ◽

Innovative Treatment ◽

Innovative Process ◽

Treat All ◽

Do So

Abstract Worldwide, most of treatment system are retuning sidestreams (SSs) to the plant wastewater head without treatment, and some innovations are only treating centrate. In this study, an innovative process was established to separately treat all SSs away from plant mainstream and return treated sidestream effluents to plant wastewater outfall instead of wastewater head. This innovative process aims to eliminate SSs impacts on full scale A2/O sewage treatment plant. To do so, a novel pilot extended nutrient moving bed biofilm reactor (EN-MBBR) was developed to treat all SSs lines (supernatant gravity thickener, underflow mechanical thickener, and centrate), and SSs elimination on full scale A2/O system was simulated using GPS-X7. The results of two steps innovative treatment showed that 98, 98, 93, 100, 85, 100 and 98% of TSS, BOD, COD, NH4, NO3, H2S and PO4-P were removed from SSs, respectively. The two steps innovative treatment combined degradation, nitrification, and dilution processes. The simulation results proved that eliminating SSs has eliminated hydraulic and pollutants shocks, reduced the volumes of full scale A2/O facilities, and minimized cost and energy. Moreover, the calibrated model was validated with R values more than 0.8 and NMSE values close to zero. To conclude, the innovative process in this study successfully treated SSs separately and eliminated their impacts.

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Tentative Nitrogen Removal with Fixed Bed Processes in Malmö Sewage Treatment Plant

Water Science & Technology ◽

10.2166/wst.1990.0150 ◽

1990 ◽

Vol 22 (1-2) ◽

pp. 239-250 ◽

Cited By ~ 1

Author(s):

B. Andersson

Keyword(s):

Activated Sludge ◽

Nitrogen Removal ◽

Sewage Treatment ◽

Fixed Bed ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Trickling Filter ◽

Test Program ◽

Made In

A test program for the use of fixed bed processes in systems for nitrogen removal at an advanced sewage treatment plant is described. Results from studies on nitrification in a full scale trickling filter plant with different filter depths and at different wastewater temperatures are presented. Results from full scale experiments with denitrification/nitrification in a retrofitted activated sludge plant are also presented. The effect of an aerated submerged fixed bed in the aeration basin on nitrification was investigated. Observations of the biofilm formed on the fixed bed were made in microscope.

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Full-Scale Experience with Sludge Treatment at the Vienna Sewage Works

Water Science & Technology ◽

10.2166/wst.1989.0341 ◽

1989 ◽

Vol 21 (10-11) ◽

pp. 1447-1451 ◽

Cited By ~ 1

Author(s):

Peter Thomas Ruggenthaler

Keyword(s):

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Fluidised Bed ◽

Test Results ◽

Sludge Treatment ◽

Treatment And Disposal ◽

Solids Content

The sewage treatment plant at Simmering, Vienna, has been operating since June 1980, together with the ‘EbS' plant for sludge treatment and disposal. This latter consisted of centrifuges, grinder dryers and fluidised bed incineration but due to difficulties with the grinder dryers it has never operated efficiently. Accordingly trials have been done using improved centrifuges and filter presses to increase the dry solids content of the cake fed to the incinerators without using the grinder dryers. It was found that all systems tried were an improvement on the existing but that the best result was achieved using a Centripress on preheated sludge conditioned by polyelectrolyte. The plant was converted to this system in 1987 and results of full-scale operation as well as test results are given in the paper.

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Upgrading of 100 000 PE Goch Sewage Treatment Plant – Design of 2-Stage Sewage Treatment and Anaerobic Thermophilic/Mesophilic Sludge-Stabilisation

Water Science & Technology ◽

10.2166/wst.1992.0511 ◽

1992 ◽

Vol 25 (4-5) ◽

pp. 331-337 ◽

Cited By ~ 3

Author(s):

G. Kugel ◽

E. Zingler ◽

G. Hellfeier

Keyword(s):

Retention Time ◽

Hydraulic Retention Time ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Sewage Water ◽

Activated Sludge Process ◽

Plant Design ◽

Potato Processing ◽

Processing Wastes

The 100 000 PE Goch STP is to be upgraded by implementing a 2-stage activated sludge process with integrated nitrification and denitrification to treat strong sewage water dominated by potato processing wastes. Thermophilic (75 °C) acidification reactors will be added to mesophilic (38 °C) digesters (total hydraulic retention time about 13 days).

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Rouse Hill – Australia's first full scale domestic non-potable reuse application

Water Science & Technology ◽

10.2166/wst.1996.0663 ◽

1996 ◽

Vol 33 (10-11) ◽

pp. 71-78 ◽

Cited By ~ 3

Author(s):

Ian B. Law

Keyword(s):

Distribution System ◽

Water Distribution ◽

Water Distribution System ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Full Scale ◽

Residential Areas ◽

North West ◽

Potable Reuse

There has been increasing interest in reuse of effluent from sewage treatment plants in Australia in recent years, not only for agricultural or land irrigation purposes but also for the provision of dual water supplies to residential areas for the non-potable purposes of toilet flushing, car washing, garden watering and park or other open space irrigation. The Rouse Hill development in the north west of Sydney is Australia's first full scale application of domestic non-potable reuse, with the sewage treatment plant and the dual water distribution system being commissioned in late 1994. This paper describes the Rouse Hill project as a whole including the reasoning behind the installation of the dual water supply system, the design of the sewage treatment plant, the effluent qualities achieved, the design of the dual water distribution system and the requirements of the regulatory authority, the NSW Environmental Protection Authority.

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Changes in Blood Chemistry and Blood Cell Morphology in Coho Salmon (Oncorhynchus kisutch) Following Exposure to Sublethal Levels of Total Residual Chlorine in Municipal Wastewater

Journal of the Fisheries Research Board of Canada ◽

10.1139/f76-095 ◽

1976 ◽

Vol 33 (4) ◽

pp. 776-782 ◽

Cited By ~ 37

Author(s):

James A. Buckley ◽

Cecil M. Whitmore ◽

Robert I. Matsuda

Keyword(s):

Municipal Wastewater ◽

Coho Salmon ◽

Sewage Treatment ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Oncorhynchus Kisutch ◽

Blood Chemistry ◽

Municipal Sewage ◽

Residual Chlorine ◽

Hematological Effects

Yearling coho salmon (Oncorhynchus kisutch) were exposed for 12 wk to either 0.3, 1.1, or 3.6% chlorinated municipal sewage treatment plant effluent with seawater diluent (average salinity 28‰)under continuous flow conditions. The maximum safe concentration of effluent lies between 0.3 and 1.1% (average total residual chlorine (TRCl2) content 0.003 and 0.009 mg/liter, respectively). Effluent concentrations of 0.3% produced no discernible effects on the fish. Concentrations of 1.1 and 3.6% (average content of TRCl2 0.030 mg/liter) resulted in reductions of hemoglobin and hematocrit to levels indicative of anemia. Observations of the erythrocytes revealed lysed and degenerating cells, increased numbers of circulating immature cells, and abnormal cells. These hematological effects are attributed to the oxidative nature of TRCl2.

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