Performance of the full-scale biological nutrient removal plant at Noosa in Queensland, Australia: nutrient removal and disinfection

2001 ◽  
Vol 44 (2-3) ◽  
pp. 57-62 ◽  
Author(s):  
V. Urbain ◽  
P. Wright ◽  
M. Thomas
Keyword(s):  
Nutrient Removal ◽  
Volatile Fatty Acids ◽  
Biological Nutrient Removal ◽  
Effluent Quality ◽  
Quality Guidelines ◽  
Treated Effluent ◽  
Multi Stage ◽  
Low Phosphorus ◽  
Long Term Performance ◽  
Term Performance

Stringent effluent quality guidelines are progressively implemented in coastal and sensitive areas in Australia. Biological Nutrient Removal (BNR) plants are becoming a standard often including a tertiary treatment for disinfection. The BNR plant in Noosa - Queensland is designed to produce a treated effluent with less than 5 mg/l of BOD5, 5 mg/l of total nitrogen, 1 mg/l of total phosphorus, 5 mg/l of suspended solids and total coliforms of less than 10/100 ml. A flexible multi-stage biological process with a pre-fermentation stage, followed by sand filtration and UV disinfection was implemented to achieve this level of treatment. Acetic acid is added for phosphorus removal because: i) the volatile fatty acids (VFA) concentration in raw wastewater varies a lot, and ii) the prefermenter had to be turned off due to odor problems on the primary sedimentation tanks. An endogenous anoxic zone was added to the process to further reduce the nitrate concentration. This resulted in some secondary P-release events, a situation that happens when low nitrate and low phosphorus objectives are targeted. Long-term performance data and specific results on nitrogen removal and disinfection are presented in this paper.

Biological nutrient removal model No.1 (BNRM1)

2004 ◽  
Vol 50 (6) ◽  
pp. 69-70 ◽  
Author(s):  
A. Seco ◽  
J. Ribes ◽  
J. Serralta ◽  
J. Ferrer
Keyword(s):  
Nutrient Removal ◽  
Volatile Fatty Acids ◽  
Wastewater Treatment Plants ◽  
Biological Nutrient Removal ◽  
Model Parameters ◽  
Nitrogen And Phosphorus ◽  
Hindered Settling ◽  
Whole Plant ◽  
Bacterial Groups ◽  
Removal Model

This paper presents the results of the work carried out by the CALAGUA Group on Mathematical Modelling of Biological Treatment Processes: the Biological Nutrient Removal Model No.1. This model is based on a new concept for dynamic simulation of wastewater treatment plants: a unique model can be used to design, simulate and optimize the whole plant, as it includes most of the biological and physico-chemical processes taking place in all treatment operations. The physical processes included are: settling and clarification processes (flocculated settling, hindered settling and thickening), volatile fatty acids elutriation and gasÐliquid transfer. The chemical interactions included comprise acidÐbase processes, where equilibrium conditions are assumed. The biological processes included are: organic matter, nitrogen and phosphorus removal; acidogenesis, acetogenesis and methanogenesis. Environmental conditions in each operation unit (aerobic, anoxic or anaerobic) will determine which bacterial groups can grow. Thus, only the model parameters related to bacterial groups able to grow in any of the operation units of a specific WWTP will require calibration. One of the most important advantages of this model is that no additional analysis with respect to ASM2d is required for wastewater characterization. Some applications of this model have also been briefly explained in this paper.

scholarly journals Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate

2020 ◽  
Vol 17 (8) ◽  
pp. 2667
Author(s):  
Tong Wang ◽  
Tong Wu ◽  
Haiyan Wang ◽  
Weiyang Dong ◽  
Yaqian Zhao ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
High Strength ◽  
Biofilm Reactors ◽  
Treated Effluent ◽  
N Removal ◽  
Entire Experiment ◽  
Advanced Nitrogen Removal ◽  
Long Term Performance ◽  
Term Performance

Nitrogen (N) remains a great challenge in wastewater treatment while attempts to remove N has continuously been a research point for decades. In this study, the long-term performance of four identical-shape denitrification MBBRs (moving bed biofilm reactors) with four different configurations of cylindrical polyethylene as carriers (Φ25 × 12, Φ25 × 4, Φ15 × 15, and Φ10 × 7 mm) for advanced N removal of real reverse osmosis concentrate was investigated in great detail. The N of the real concentrate can be effectively removed by denitrification MBBRs when the pH, temperature, hydraulic retention time (HRT), C/N ratio, and filling rate are 7.50–8.10, 24~26 °C, 12 hours, 6.6, and 50%, respectively. The results showed that the MBBR with the Φ15 × 15 poly-carrier had the best removal efficiency on NO3-–N (78.0 ± 15.8%), NO2-–N (43.79 ± 9.30%), NH4+–N (55.56 ± 22.28%), and TN (68.9 ± 12.4%). The highest biomass of 2.13 mg/g-carrier was in the Φ15 × 15 poly-carrier was compared with the other three carriers, while the genes of the Φ15 × 15 poly-carrier reactor were also the most abundant. Proteobacteria was the most abundant phylum in the system followed by Bacteroidetes and then Firmicutes. The entire experiment with various parameter examination supported that Φ15 × 15 poly-carrier MBBR was a promising system for N removal in high strength concentrate. Despite the lab-scale trial, the successful treatment of high strength real reverse osmosis concentrate demonstrated the reality of the treated effluent as possible reclaimed water, thus providing a good showcase of N-rich reverse osmosis concentrate purification in practical application.

Full Scale Experience with Tertiary Contact Filtration

1984 ◽  
Vol 16 (10-11) ◽  
pp. 225-239 ◽  
Author(s):  
M Boller
Keyword(s):  
Phosphorus Removal ◽  
Full Scale ◽  
Operating Variables ◽  
Low Phosphorus ◽  
Total Process ◽  
Chemical Conditions ◽  
Long Term Performance ◽  
Term Performance ◽  
Process Combination

The first full-scale contact filtration plant for advanced phosphorus removal in Switzerland was built 1979. In a twelve month investigation, the following design and operational aspects were considered: optimal chemical conditions for phosphorus removal, multimedia filter configuration, long-term performance of the total process combination (which included conventional treatment with simultaneous precipitation and contact filtration), and operating variables as filtration velocity, filter run time and backwash water use. Under optimal conditions, contact filtration provided consistently low phosphorus and suspended solids levels at reasonable cost.

Analysis and Optimization of a Multi-Stage Solar Collector System

1986 ◽  
Vol 108 (3) ◽  
pp. 192-198
Author(s):  
J. M. Gordon ◽  
C. Saltiel
Keyword(s):  
Control Strategies ◽  
Cost Effective ◽  
Constant Load ◽  
Analytic Method ◽  
Climatic Data ◽  
Collector System ◽  
Multi Stage ◽  
Cost Effective Method ◽  
Long Term Performance ◽  
Term Performance

We present an analytic method for predicting the long-term performance of solar energy systems with more than one collector brand (“multi-stage” systems). This procedure enables the designer to determine the most cost-effective method of combining different collector brands for a given load. Although our derivations pertain to solar systems for constant load applications and/or near constant collector operating threshold, they can also be used for conventional multi-pass designs. The problems of excess energy delivery, and of various collector on/off control strategies, are taken into account. Our results are simple closed-form expressions whose evaluation requires readily-available average climatic data, and load and collector characteristics. The analytic method is illustrated by a solved example which shows that significant savings can be realized by combining different collector brands for a given application (multi-staging).

Long-term performance of nutrient removal in an integrated constructed wetland

2021 ◽  
Vol 779 ◽  
pp. 146268
Author(s):  
Yinuo Zhu ◽  
Lijuan Cui ◽  
Jing Li ◽  
Rumiao Wang ◽  
Jan Vymazal ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Nutrient Removal ◽  
Integrated Constructed Wetland ◽  
Long Term Performance ◽  
Term Performance

Optimizing Biological Nutrient Removal in anoxic zones

1999 ◽  
Vol 39 (6) ◽  
pp. 113-118 ◽  
Author(s):  
Gerald M. Stevens ◽  
James L. Barnard ◽  
Barry Rabinowitz
Keyword(s):  
Nutrient Removal ◽  
Volatile Fatty Acids ◽  
Bacterial Species ◽  
Phosphorus Uptake ◽  
Full Scale ◽  
High Rate ◽  
Biological Nutrient Removal ◽  
Anoxic Zone ◽  
Anoxic Conditions ◽  
Anaerobic Zone

During the initial years of the development of Biological Nutrient Removal (BNR) technology, it was assumed that the bacterial species responsible of the removal of phosphorus (BioP organisms) could not use nitrates as a final electron acceptor and could thus not denitrify. The carbon taken up in the form of Volatile Fatty Acids (VFA) in the anaerobic zone was thus deemed to be unavailable for denitrification in the anoxic zone. This was reinforced through experiments in which BioP organisms cultured in the high-rate Phoredox system in which no nitrification took place, did not denitrify when nitrates were added. Many researchers (e.g. Dold and Barker) have since shown that in BNR systems such as the 3-Stage Bardempho system, where nitrates are recycled to the anoxic zone which follows the anaerobic zone, a high degree of phosphorus uptake through denitrification does occur. In addition, the partial diversion of primary effluent directly to the anoxic zone has significantly improved phosphorus uptake under anoxic conditions. Full-scale operations at the Westbank, British Columbia, plant showed a substantial uptake of phosphorus in the anoxic zone in the absence of oxygen. The Westbank configuration includes side stream primary sludge fermentation, VFA rich fermenter supernatant addition directly to the anaerobic zone and diversion of a portion of primary effluent to the anoxic zone. This configuration stimulates P-uptake under anoxic conditions, demonstrates the efficient use of carbon and is instrumental in achieving an annual average effluent Total-P concentration of less than 0.17 mg/l. The phenomenon of denitrification by BioP organisms was included in the Biowin Model developed by Dold (Biowin Manual). This paper describes experiments and full-scale plant observations to establish the role of BioP organisms in the removal of nitrates in the anoxic zone of a plant which also receives a portion of the primary effluent and verification of the Biowin model.

Impact of separate urine collection on wastewater treatment systems

2003 ◽  
Vol 48 (1) ◽  
pp. 103-110 ◽  
Author(s):  
J. Wilsenach ◽  
M. van Loosdrecht
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Energy Demand ◽  
Biological Nutrient Removal ◽  
Urine Collection ◽  
Sustainable Society ◽  
Effluent Quality ◽  
Save Energy ◽  
Sustainable Wastewater Treatment ◽  
Wastewater Treatment Systems

Wastewater treatment should not only be concerned with urban hygiene and environmental protection, but development of a sustainable society must also be considered. This implies a minimisation of the energy demand and potential recovery of finite minerals. Urine contains 80% of the nitrogen (N) and 45% of the phosphorus (P) in wastewater. Separate collection and treatment would improve effluent quality and save energy in centralised biological nutrient removal (BNR). BNR processes are not optimal to treat water with very low N concentration resulting from separate urine collection. Relying on nutrient removal through sludge production, methanation of the sludge, subsequent nutrient removal from the digestion effluent results in optimised and more sustainable wastewater treatment. This paper quantitatively evaluates this option and discusses the potential.

The variation of volatile fatty acid compositions in sewer length, and its effect on the process design of biological nutrient removal

2013 ◽  
Vol 67 (12) ◽  
pp. 2753-2760 ◽  
Author(s):  
Z. Yun ◽  
G. H. Yun ◽  
H. S. Lee ◽  
T. U. Yoo
Keyword(s):  
Process Design ◽  
Nutrient Removal ◽  
Volatile Fatty Acids ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Biological Nutrient Removal ◽  
Biological Phosphorus Removal ◽  
Sewer System ◽  
Sewer Systems ◽  
Biological Phosphorus

The potential of enhanced biological phosphorus removal (EBPR) in biological nutrient removal (BNR) systems critically depends on the availability and types of volatile fatty acids (VFAs) in sewage. Although the characteristics of VFAs in sewage are strongly related with the biochemical transformations in the sewer system, they have not been studied thoroughly in terms of BNR process design. We have investigated the characteristics of VFAs in influent of nine sewage treatment plants which represent typical small to very large sewer systems in Korea. We found that influent total VFACOD (VFA as chemical oxygen demand) concentrations ranged from 20.4 to 65.2 mg/L. Acetic acid was a predominant VFA in sewage, and the propionic acid (HPr) portion averaged 38.7% of total VFACOD. However the sewage from longer sewer systems showed more HPr content, indicating that type of VFA varied with the total sewer length. The finding is a particularly important consideration for BNR process design since availability of HPr positively behaved to suppress the unfavorable growth of glycogen-accumulating organisms. The implication of these findings for BNR process design is discussed in this paper.

Tertiary nitrification in aerated pilot biofilters

1994 ◽  
Vol 29 (10-11) ◽  
pp. 53-60 ◽  
Author(s):  
M. Tschui ◽  
M. Boller ◽  
W. Gujer ◽  
J. Eugster ◽  
C. Mäder ◽  
...  
Keyword(s):  
Pilot Scale ◽  
Operating Conditions ◽  
Nitrification Rate ◽  
Measured Temperature ◽  
Exponential Relationship ◽  
Effluent Quality ◽  
Different Types ◽  
Long Term Performance ◽  
Term Performance

Three different types of internally aerated pilot scale biofilters were operated as tertiary nitrification systems. Long-term performance of the three aerated biofilters was tested under various operating conditions. The maximum volumetric nitrification rates under non NH4-limiting conditions for the three aerated biofilter systems were investigated. Based on measured temperature dependencies, an exponential relationship was established enabling the prediction of the nitrification rates at desired temperatures. Based on a temperature of 10°C, the results allow a comparison between the surface and volume specific nitrification rates in the tested biofilters as a function of the NH4 effluent concentration. As shown by experiments, nitrification performance depends on water as well as air velocities in the filter. Higher velocities of both air and water increase the nitrification rate. However, they also increase the head loss and thus decrease the filter run time. Therefore, the optimal operating conditions depend also on the filter media and the required effluent quality. Compared to fully O2-limiting operating conditions, nitrification performance during a period under partially NH4-limiting conditions clearly decreased in all tested biofilters.

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