Numerical simulation of dissolved oxygen, algal biomass, nitrate, organic nitrogen, ammonia, and dissolved phosphorus in waste stabilization ponds

2018 ◽  
Vol 135 ◽  
pp. 188-197 ◽  
Author(s):  
Seyed Ahmad Mirbagheri ◽  
Sina Nejati ◽  
Sina Moshirvaziri
Keyword(s):  
Numerical Simulation ◽  
Dissolved Oxygen ◽  
Algal Biomass ◽  
Organic Nitrogen ◽  
Waste Stabilization Ponds ◽  
Dissolved Phosphorus ◽  
Stabilization Ponds ◽  
Waste Stabilization

scholarly journals Modeling Nitrogen Decrease in Water Lettuce Ponds from Waste Stabilization Ponds

2018 ◽  
Vol 31 ◽  
pp. 04004
Author(s):  
Gitta Agnes Putri ◽  
Sunarsih
Keyword(s):  
Organic Nitrogen ◽  
Nitrogen Transformation ◽  
Rate Of Change ◽  
Nitrogen Compounds ◽  
Water Lettuce ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Bacterial Uptake ◽  
Nitrate And Nitrite

This paper presents about the dynamic modeling of the Water Lettuce ponds as a form of improvement from the Water Hyacinth ponds. The purpose of this paper is to predict nitrogen decrease and nitrogen transformation in Water Lettuce ponds integrated with Waste Stabilization Ponds. The model consists of 4 mass balances, namely Dissolved Organic Nitrogen (DON), Particulate Organic Nitrogen (PON), ammonium (NH4+), Nitrate and Nitrite (NOx). The process of nitrogen transformation which considered in a Water Lettuce ponds, namely hydrolysis, mineralization, nitrification, denitrification, plant and bacterial uptake processes. Numerical simulations are performed by giving the values of parameters and the initial values of nitrogen compounds based on a review of previous studies. Numerical results show that the rate of change in the concentration of nitrogen compounds in the integration ponds of waste stabilization and water lettuce decreases and reaches stable at different times.

Design of water hyacinth ponds for removing algal particles from waste stabilization ponds

2004 ◽  
Vol 48 (11-12) ◽  
pp. 115-123 ◽  
Author(s):  
Y. Kim ◽  
D.L. Giokas ◽  
P.-G. Chung ◽  
D.-R. Lee
Keyword(s):  
Dissolved Oxygen ◽  
Water Hyacinth ◽  
Suspended Solids ◽  
Ph Dependence ◽  
Waste Stabilization Ponds ◽  
State Reduction ◽  
Detention Time ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Separation Model

In this study it was demonstrated that when water hyacinth ponds (WHPs) are used for polishing the effluent from waste stabilization ponds (WSPs), suspended solids (mostly algal particles) are efficiently separated, which also resulted in the reduction of insoluble forms of COD and nutrients. The high pH of the WSPs effluent was easily adjusted to 6-7 as it passed through the WHPs. However, the use of water hyacinth rapidly reduced dissolved oxygen at the first cell to less than three mg/L or very frequently to a level of anaerobic state. Reduction of suspended solids at the WHPs mainly depends on the detention time and pH. An empirical separation model incorporating the detention time and pH dependence was developed.

Modelling diurnal variation of dissolved oxygen in waste stabilization ponds

2000 ◽  
Vol 127 (1) ◽  
pp. 21-31 ◽  
Author(s):  
S Kayombo ◽  
T.S.A Mbwette ◽  
A.W Mayo ◽  
J.H.Y Katima ◽  
S.E Jorgensen
Keyword(s):  
Dissolved Oxygen ◽  
Diurnal Variation ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization

Microalgal luxury uptake of phosphorus in waste stabilization ponds – frequency of occurrence and high performing genera

2017 ◽  
Vol 78 (1) ◽  
pp. 165-173 ◽  
Author(s):  
A. Crimp ◽  
N. Brown ◽  
A. Shilton
Keyword(s):  
Phosphorus Content ◽  
Microscopic Analysis ◽  
Full Scale ◽  
High Rate ◽  
Waste Stabilization Ponds ◽  
High Performing ◽  
Dissolved Phosphorus ◽  
Climatic Regions ◽  
Stabilization Ponds ◽  
Waste Stabilization

Abstract Microalgae commonly found in waste stabilization ponds (WSPs) are able to accumulate elevated phosphorus levels within their cells in a process known as luxury uptake. However, there are few studies focused on luxury uptake in full scale WSPs. In order to comprehensively quantify the occurrence of this phenomenon, eight different WSP sites comprising seven primary facultative, six maturation and two high rate algal ponds (HRAPs) spread over several climatic regions were monitored over four seasons. Of the 15 ponds studied, 13 of these exhibited elevated levels of biomass phosphorus content at some point; however, the occurrence in HRAPs was limited. More than half of the samples tested had elevated phosphorus contents and this occurred in all climatic zones surveyed. The phosphorus content of the biomass was significantly correlated to decreasing rainfall and increasing total dissolved phosphorus. Microscopic analysis revealed that nearly all the 17 microalgal and five cyanobacterial genera identified performed luxury uptake, but at varying frequencies. This is the first time that the genera of algae responsible for luxury uptake in full scale WSPs has been studied. Chlamydomonas/Cryptomonas, Micractinium/Microcystis and Scenedesmus were the only microalgal genera found to both commonly occur in WSPs and consistently perform luxury uptake.

Physico-Chemical Parameters Influencing Faecal Bacterial Survival in Waste Stabilization Ponds

1987 ◽  
Vol 19 (12) ◽  
pp. 145-152 ◽  
Author(s):  
H. W. Pearson ◽  
D. D. Mara ◽  
S. W. Mills ◽  
D. J. Smallman
Keyword(s):  
Dissolved Oxygen ◽  
Elevated Temperatures ◽  
Ph Effect ◽  
Faecal Coliform ◽  
Bacterial Survival ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Physico Chemical

In situ studies on waste stabilization ponds (in Portugal) showed that faecal coliform numbers were lowest at positions in the water column where pH, temperature, dissolved oxygen and algae were high. Numbers were not always lowest at the surface where light intensities were highest or in ponds where light penetration had increased through algal grazing by Daphnia. Laboratory studies showed that pH values approaching 9.0 or above increased faecal coliform die-off particularly under nutrient-poor conditions. Elevated temperatures enhanced the pH effect but the level of dissolved oxygen made little difference. Streptococcus, Salmonella and Campylobacter isolates all behaved similarly to the faecal coliforms. Daphnia grazing of the algal population in maturation ponds may reduce the microbial quality of the final effluent. These findings are discussed in relation to pond design.

scholarly journals A Closer Look on Spatiotemporal Variations of Dissolved Oxygen in Waste Stabilization Ponds Using Mixed Models

Water ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 201 ◽  
Author(s):  
Long Ho ◽  
Duy Pham ◽  
Wout Van Echelpoel ◽  
Leacky Muchene ◽  
Ziv Shkedy ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Mixed Models ◽  
Spatiotemporal Variations ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization

Rotavirus removal in experimental waste stabilization pond systems with different geometries and configurations

1995 ◽  
Vol 31 (12) ◽  
pp. 285-290 ◽  
Author(s):  
J. I. Oragui ◽  
H. Arridge ◽  
D. D. Mara ◽  
H. W. Pearson ◽  
S. A. Silva
Keyword(s):  
Clostridium Perfringens ◽  
Slow Process ◽  
Faecal Coliforms ◽  
Waste Stabilization Ponds ◽  
Stabilization Pond ◽  
Waste Stabilization Pond ◽  
Stabilization Ponds ◽  
Waste Stabilization

Rotavirus removal in waste stabilization ponds is a relatively slow process: in a series of ten ponds (a 1-d anaerobic pond followed by nine 2-d ponds) its numbers were reduced from 1.4 × 105 per litre to zero, and in an “innovative” series (a 1-day anaerobic pond, 3-d facultative pond, 3.8-d, 3-d and 5-d maturation ponds) from 5.1 × 104 per litre to <5 per litre. Faecal coliforms were better indicators of rotaviruses than was Clostridium perfringens .

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