Calibration of kinetic parameters in the IAWQ Activated Sludge Model: a pilot scale experience

2000 ◽  
Vol 42 (3-4) ◽  
pp. 29-34 ◽  
Author(s):  
H. Satoh ◽  
E. Okuda ◽  
T. Mino ◽  
T. Matsuo
Keyword(s):  
Activated Sludge ◽  
Accumulation Rate ◽  
Pilot Scale ◽  
Hydrolysis Rate ◽  
Biological Phosphorus Removal ◽  
Urban Sewage ◽  
Polyphosphate Accumulation ◽  
Polyphosphate Accumulating Organisms ◽  
Activated Sludge Processes ◽  
Biological Phosphorus

The parameters in the mathematical simulation model for the nutrient removal activated sludge process were calibrated by using operational performance data obtained on enhanced biological phosphorus removal activated sludge processes treating urban sewage. By changing five parameters, maximum specific growth rate of nitrifiers, saturation constant of ammonia for nitrifiers, maximum specific hydrolysis rate under anaerobic conditions, maximum specific fermentation rate, and maximum specific polyphosphate accumulation rate of polyphosphate accumulating organisms (PAOs), the process performance was well reproduced by simulation. For the improvement of simulation, inclusion of the formation or presence of soluble COD which is not utilized by PAOs either directly or via fermentation was proposed.

Pilot Scale Studies on Enhanced Phosphorus Removal in a Single-Stage Activated Sludge Treatment Plant

1985 ◽  
Vol 17 (11-12) ◽  
pp. 309-310 ◽  
Author(s):  
W. Maier ◽  
P. Kainrath ◽  
Kh Krauth ◽  
R. Wagner
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Continuous Process ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Single Stage ◽  
Biological Phosphorus Removal ◽  
Sludge Treatment ◽  
Biological Phosphorus ◽  
P Removal

Enhanced biological phosphorus removal from domestic sewage was investigated in a single-stage activated sludge treatment plant with pre-denitrification operated in a continuous process. In 10 different experimental periods the influence of varying composition of the influent, varying systems of the pilot scale unit (with and without anaerobic basin), varying retention times in the different basins and varying sludge loads were investigated. Results of the experiments can be summarized as follows: the nutrient situation and especially the P/BOD5 and N/BOD5 ratios, retention time in the final clarifier, and organic sludge load plus the desired degree of nitrification have essential influence on the process and P removal efficiency. The conclusions for the pilot scale process are discussed.

Hydrolysis and fermentation of activated sludge to enhance biological phosphorus removal

2006 ◽  
Vol 53 (12) ◽  
pp. 55-64 ◽  
Author(s):  
J. Vollertsen ◽  
G. Petersen ◽  
V.R. Borregaard
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Phosphorus Release ◽  
Accumulation Rates ◽  
Biological Phosphorus Removal ◽  
Release Rates ◽  
Polyphosphate Accumulating Organisms ◽  
Biological Phosphorus ◽  
Hydrolysis Of

The conventional mainstream enhanced biological phosphorus removal (EBPR) process depends on the quality of the raw incoming wastewater. An alternative sidestream EBPR process is presented, where the substrates for storage by the polyphosphate accumulating organisms (PAOs) instead come from hydrolysis of the return activated sludge. This process is studied in full-scale at two treatment plants and quantified by means of phosphorus release rates and readily biodegradable COD (RBCOD) accumulation rates. It was seen that not only was a significant amount of RBCOD stored by PAOs but an approximately equal amount was accumulated in the sidestream hydrolysis tank and made available for the subsequent nitrogen removal process. The phosphorus release of the sludge with and without addition of different substrates was furthermore studied in laboratory scale. The study showed that the process is promising and in a number of cases will have significant advantages compared with the conventional mainstream EBPR design.

Fixed film phosphorus removal – flexible enough?

2006 ◽  
Vol 53 (12) ◽  
pp. 75-81 ◽  
Author(s):  
F. Rogalla ◽  
T.L. Johnson ◽  
J. McQuarrie
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Process Conditions ◽  
Full Potential ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Attached Growth ◽  
Fixed Film ◽  
Activated Sludge Processes ◽  
Biological Phosphorus

While biological phosphorus removal (BPR) has been practised for 30 years, up to recently it has been restricted mainly to activated sludge processes, with the corresponding need for large basin volumes. Yet, research with biofilm reactors showed that the principle of alternate anaerobic and aerated conditions was applicable to fixed bacteria by changing the conditions in time rather than in space. Attached growth enhanced biological phosphorus removal (EBPR) systems are attractive because of their compactness and capability to retain high biomass levels. However, the phosphorus extraction depends on backwashes to enhance the phosphorus-rich attached biomass, and correct control of unsteady effluent quality created by frequently modified process conditions. Accordingly, EBPR remains a challenging task in terms of combining nitrogen and phosphorus removal using attached growth systems. Nevertheless, a combination of activated sludge and biofilm carriers, in the integrated fixed-film activated sludge system, provides treatment opportunities not readily available using suspended growth systems. Current practice is only at the beginning of exploiting the full potential of this combination, but the first full-scale results show that compact tankage and low nutrient results based on biological principles are possible.

scholarly journals Polyhydroxybutyrate Production from Municipal Wastewater Activated Sludge with Different Carbon Sources

2015 ◽  
Vol 8 ◽  
pp. ASWR.S27218 ◽  
Author(s):  
Qiuyan Yuan ◽  
Richard Sparling ◽  
Jan Oleszkiewicz
Keyword(s):  
Activated Sludge ◽  
Phosphorus Removal ◽  
Municipal Wastewater ◽  
Carbon Sources ◽  
Biological Phosphorus Removal ◽  
Beef Extract ◽  
Dry Cell Weight ◽  
Phb Production ◽  
Polyphosphate Accumulating Organisms ◽  
Biological Phosphorus

In this study, a sequencing batch reactor was set up and operated for over three months to cultivate polyphosphate-accumulating organisms polyphosphate-accumulating organisms (PAOs) in the enriched activated sludge. Batch studies were then carried out to study the effect of different carbon sources on phosphorus removal as well as polyhydroxybutyrate (PHB) production. The carbon sources investigated were acetate, glucose, wastewater, and beef extract. It was found that enhanced biological phosphorus removal could not be achieved using glucose as substrate. This suggested that glucose was not a good candidate for biological phosphorus removal. In terms of PHB production, using acetate and glucose as substrate resulted in PHB production of 42% and 40%, respectively, of the dry cell weight (DCW). Lower PHB production was obtained from using municipal wastewater and beef extract as a carbon source. This resulted in ∼15% and 13% of DCW. It was concluded that municipal wastewater activated sludge can be an economic alternative for PHB production if municipal wastewater is mixed with certain kinds of carbon-enriched industrial wastewater.

Heterotrophic Kinetic Parameter Estimation for Enhanced Biological Phosphorus Removal Processes Operated in Conventional and Membrane-Assisted Modes

2006 ◽  
Vol 41 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Zhe Zhang ◽  
Eric R. Hall
Keyword(s):  
Parameter Estimation ◽  
Phosphorus Removal ◽  
Growth Yield ◽  
Pilot Scale ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Nitrogen And Phosphorus ◽  
Parameter Values ◽  
The Impact ◽  
Biological Phosphorus

Abstract Parameter estimation and wastewater characterization are crucial for modelling of the membrane enhanced biological phosphorus removal (MEBPR) process. Prior to determining the values of a subset of kinetic and stoichiometric parameters used in ASM No. 2 (ASM2), the carbon, nitrogen and phosphorus fractions of influent wastewater at the University of British Columbia (UBC) pilot plant were characterized. It was found that the UBC wastewater contained fractions of volatile acids (SA), readily fermentable biodegradable COD (SF) and slowly biodegradable COD (XS) that fell within the ASM2 default value ranges. The contents of soluble inert COD (SI) and particulate inert COD (XI) were somewhat higher than ASM2 default values. Mixed liquor samples from pilot-scale MEBPR and conventional enhanced biological phosphorus removal (CEBPR) processes operated under parallel conditions, were then analyzed experimentally to assess the impact of operation in a membrane-assisted mode on the growth yield (YH), decay coefficient (bH) and maximum specific growth rate of heterotrophic biomass (µH). The resulting values for YH, bH and µH were slightly lower for the MEBPR train than for the CEBPR train, but the differences were not statistically significant. It is suggested that MEBPR simulation using ASM2 could be accomplished satisfactorily using parameter values determined for a conventional biological phosphorus removal process, if MEBPR parameter values are not available.

Upgrading Wastewater Treatment Plants with Anaerobic Selectors

1990 ◽  
Vol 22 (7-8) ◽  
pp. 35-43
Author(s):  
K. D. Tracy ◽  
S. N. Hong
Keyword(s):  
Phosphorus Removal ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
High Rate ◽  
Nitrogen Control ◽  
Biological Phosphorus Removal ◽  
Conventional Activated Sludge ◽  
And Performance ◽  
Activated Sludge Processes ◽  
Biological Phosphorus

The anaerobic selector of the A/0™ process offers many advantages over conventional activated sludge processes with respect to process performance and operational stability. This high-rate, single-sludge process has been successfully demonstrated in full-scale operations for biological phosphorus removal and total nitrogen control in addition to BOD and TSS removal. This process can be easily utilized in upgrading existing treatment plants to meet stringent discharge limitations and to provide capacity expansion. Upgrades of two full-scale installations are described and performance data from the two facilities are presented.

Sign in / Sign up

Export Citation Format

Share Document