scholarly journals The relation between the number of microanimals (prolozoa and rotifer) in activated sludge and the treatment water quality, and the application of them to maintenance.

1997 ◽  
Vol 26 (11) ◽  
pp. 750-757
Author(s):  
Nobuyuki HAYASHI
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Treatment Water

scholarly journals Effects of Power Saving on Treatment Water Quality and Biota Characteristics in an Activated Sludge Process of SewageTreatment

2011 ◽  
Vol 47 (4) ◽  
pp. 157-168 ◽  
Author(s):  
KOJI JONO ◽  
HIROSHI YAMAZAKI ◽  
AKIRA SANO ◽  
KAI-QIN XU ◽  
RYUHEI INAMORI ◽  
...  
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Power Saving ◽  
Activated Sludge Process ◽  
Treatment Water

Activated sludge process coupled with intermittent ozonation for sludge yield reduction and effluent water quality control

2011 ◽  
Vol 86 (7) ◽  
pp. 978-984 ◽  
Author(s):  
Oliver Järvik ◽  
Andres Viiroja ◽  
Sven Kamenev ◽  
Inna Kamenev
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Activated Sludge ◽  
Yield Reduction ◽  
Activated Sludge Process ◽  
Effluent Water ◽  
Water Quality Control

Changes in waste stabilisation pond performance resulting from the retrofit of activated sludge treatment upstream: part I – water quality issues

2005 ◽  
Vol 51 (12) ◽  
pp. 11-16 ◽  
Author(s):  
N.J. Cromar ◽  
D.G. Sweeney ◽  
M.J. O'Brien ◽  
H.J. Fallowfield
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Activated Sludge ◽  
Algal Biomass ◽  
Inorganic Nitrogen ◽  
Treatment Plant ◽  
South Australia ◽  
N:P Ratio ◽  
Waste Stabilisation Ponds ◽  
Trickling Filters

This paper describes changes in effluent quality occurring before and after an upgrade to the Bolivar Wastewater Treatment Plant in South Australia. Trickling filters (TF) were replaced with an activated sludge (AS) plant, prior to tertiary treatment using waste stabilisation ponds (WSPs). The water quality in the WSPs following the upgrade was significantly improved. Reductions in total and soluble BOD, COD, TKN, suspended solids and organic nitrogen were recorded and the predominant form of inorganic nitrogen changed from NH4-N to NO2/NO3-N. The reduction in ammonium and potentially toxic free ammonia removed a control upon the growth of zooplankton, which may have contributed to decreases in algal biomass in the final ponds and consequently lower dissolved oxygen. Additionally, changes in inorganic nitrogen speciation contributed to a slightly elevated pH which reduced numbers of faecal coliforms in WSPs. The AS pretreated influent recorded significantly lower inorganic molar N:P ratio (10–4:1) compared to those fed with TF effluent (17–13:1). Algae within the WSPs may now be nitrogen limited, a condition which may favour the growth of nitrogen-fixing cyanobacteria. The decrease in algal biomass and in dissolved oxygen levels may enhance sedimentary denitrification, further driving the system towards nitrogen limitation.

Combined microfiltration and adsorption process applied to public water supply treatment: water quality influence on pesticides removal

2019 ◽  
Vol 41 (18) ◽  
pp. 2382-2392
Author(s):  
Alcione Aparecida de Almeida Alves ◽  
Giselle Louise de Oliveira Ruiz ◽  
Thyara Campos Martins Nonato ◽  
Catiane Pelissari ◽  
Adriana Dervanoski ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Supply ◽  
Adsorption Process ◽  
Public Water Supply ◽  
Treatment Water

Simulation of wastewater treatment plant within integrated urban wastewater models

2010 ◽  
Vol 61 (10) ◽  
pp. 2645-2652 ◽  
Author(s):  
S. Heusch ◽  
B. Kamradt ◽  
M. Ostrowski
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Wastewater Treatment Plant ◽  
Planning Process ◽  
Treatment Plant ◽  
Federal State ◽  
Quality Model ◽  
Modelling Framework ◽  
Software Modelling

In the federal state of Hesse in Germany the application of an integrated software modelling framework is becoming part of the planning process to attain legal approval for the operation of combined sewer systems. The software allows for parallel simulation of flow and water quality routing in the sewer system and in receiving rivers. It combines existing pollution load model approaches with a simplified version of the River Water Quality Model No. 1 (RWQM1). Comprehensive simulation of the wastewater treatment plant (WWTP) is not considered yet. The paper analyses alternatives for the implementation of a WWTP module to model activated sludge plants. For both primary and secondary clarifiers as well as for the activated sludge process concepts for the integration into the existing software framework were developed. The activated sludge concept which uses a linearized version of the well known ASM1 model is presented in detail.

scholarly journals Evaluation of the Growth and the Yield of Eggplant Crop Under Different Irrigation Depths and Magnetic Treatment of Water

2019 ◽  
Vol 11 (17) ◽  
pp. 35
Author(s):  
Álvaro Henrique Cândido de Souza ◽  
Roberto Rezende ◽  
Cássio de Castro Seron ◽  
Marcelo Zolin Lorenzoni ◽  
Jean Marcelo Rodrigues do Nascimeto ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Water Depth ◽  
Irrigation Water ◽  
Dry Matter ◽  
Magnetic Treatment ◽  
Growth And Yield ◽  
Two Factors ◽  
Water Depths ◽  
Treatment Water

The use of magnetizers for the treatment of irrigation water can be used in agriculture as an alternative to increase the growth and yield of several crops. The objective of this study was to evaluate the effect of different irrigation depths and magnetic treatment of water on eggplant crop cultivated in protected environment. The study was carried out in two experiments, in the first one, the design was completely randomized with four replications and two factors: water depths (50, 75 and 100% ETc) for two water qualities (water treated by magnetizers and water without treatment). In the second one, the design was completely randomized with five replicates and two factors: water depths (75 and 100% ETc) for two irrigation water treatment (water treated by magnetizers and water without treatment). In the second experiment was ignored the treatment of 50% of ETc in order to increase the number of repetitions to check if there are differences between water treated to water without treatment. There were no significant differences in eggplant yield and growth as function of the magnetic treatment of water. The water depth that provided the highest yield, number of fruits per plant and stem dry matter in the two experiments was 100% ETc regardless of water quality.

Relationship between manual air valve positioning, water quality and energy usage in activated sludge processes

2020 ◽  
Vol 173 ◽  
pp. 115537
Author(s):  
Samuel Reifsnyder ◽  
Manel Garrido-Baserba ◽  
Francesca Cecconi ◽  
Larry Wong ◽  
Phil Ackman ◽  
...  
Keyword(s):  
Water Quality ◽  
Activated Sludge ◽  
Energy Usage ◽  
Air Valve ◽  
Activated Sludge Processes
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