Full-scale experience with the deammonification process to treat high strength sludge water – a case study

2012 ◽  
Vol 65 (3) ◽  
pp. 447-455 ◽  
Author(s):  
N. Jardin ◽  
J. Hennerkes
Keyword(s):  
Wastewater Treatment Plants ◽  
High Strength ◽  
Full Scale ◽  
Lag Phase ◽  
Stable Operation ◽  
Low Oxygen ◽  
Recent Developments ◽  
Treatment Train ◽  
Volumetric Loading ◽  
Nitrogen Elimination

More stringent effluent criteria with regard to nitrogen calls for improved nutrient removal techniques in wastewater treatment plants (WWTPs). Besides optimisation of the liquid treatment train of the plants, attention has increasingly centred on the problem of return flows from sludge treatment. One of the most recent developments aimed at the reduction of this nitrogen load is deammonification which has been used at one of Ruhrverband's plants since 2002 by applying a moving bed system. To gain additional experience in operating this process, another full scale plant was modified in 2007 by integration of deammonification, using a SBR system with suspended biomass based on the DEMON® control scheme. By using seeding sludge from Strass WWTP in Austria, start-up has been achieved within only 1 day. After stable operation for several months, increasing nitrate concentrations were observed in the effluent of the system indicating growing activity of nitrite oxidising bacteria (NOB). Following severe process deterioration, it was decided to re-start the system again but the same behaviour, i.e. increasing levels of nitrate, was observed once again. Several approaches were used to suppress NOB organisms in full-scale without success, e.g. low oxygen levels and high free ammonia concentrations. Finally, the reduction of the aerobic cycle length during intermittent aeration down to 8 min, followed by an anoxic mixing period of only 18 min was successful in inhibiting the activity of NOB organisms, most probably due to their elevated lag-phase compared with ammonium oxidising bacteria. Today, nitrogen elimination that has been stabilised at more than 80% at a daily volumetric loading rate of 0.5 kg N/(m3 d). The total costs amount to €2.3/kg Neli.

Nitrogen Removal in Full-Scale “Anoxic Anaerobic Micro-Aerobic Aerobic (A2O2)” System Treating Wastewater of Nitrogenous Fertilizer Factory

2012 ◽  
Vol 209-211 ◽  
pp. 2039-2044
Author(s):  
Jian Lei Gao ◽  
Bing Nan Lv ◽  
Yi Xin Yan ◽  
Jian Ping Wu
Keyword(s):  
Process Parameters ◽  
Nitrogen Removal ◽  
High Strength ◽  
Full Scale ◽  
Nitrite Accumulation ◽  
Stable Operation ◽  
Reflux Ratio ◽  
Operational Parameters ◽  
Emission Standard ◽  
Nitrogenous Fertilizer

A full-scale nitrogen removal system composed of an anoxic tank, an anaerobic tank, a micro-aerobic tank and an aerobic tank (A2O2) was established to treat 15,000 t/d high strength ammonia wastewater of a nitrogenous fertilizer factory. After the first stage of commissioning test, the stable operation of short-cut nitrification and denitrification has been realized at the normal temperature. The results showed that under the conditions of COD/TN ratio of only 1~2, the average removal efficiency of COD、NH3-N and TN achieved 80%, 96% and 54%, respectively without extra addition of alkalinity or carbon source, and the effluent quality was better than the requirement of the《Synthetic ammonia industrial water contamination emission standard》(draft for comment). The variation of nitrogen compounds concentration and operational parameters of pH, DO were investigated in each tank of A2O2 system. The results showed that the short-cut nitrification was stabilized in the micro-aerobic tank through the control of DO concentration (about 0.6 mg/L). Although the pH of micro-aerobic tank was only 6.6 which inhibited the growth of nitrite bacteria, the nitrite accumulation ratio reached about 48 %, closing to the criteria for judgment of short-cut nitrification of 50%. During operation, the process parameters of the A2O2 system such as reflux ratio of the mixed liquids, sludge load, sludge concentration, sludge age and SVI were all maintained in normal range, and small fluctuation of process parameters didn’t show obvious influence on short-cut nitrification.

Specific SBR population behaviour as revealed by comparative dynamic simulation analysis of three full-scale municipal SBR wastewater treatment plants

2006 ◽  
Vol 54 (1) ◽  
pp. 71-80 ◽  
Author(s):  
S.G.E. Rönner-Holm ◽  
A. Mennerich ◽  
N.C. Holm
Keyword(s):  
Wastewater Treatment ◽  
Dynamic Simulation ◽  
Simulation Analysis ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Full Scale ◽  
Lag Phase ◽  
Online Data ◽  
Similar Kinetic

Three full-scale municipal sequential batch reactor (SBR) wastewater treatment plants (WWTPs) were investigated by dynamic simulation studies using ASM1.All three WWTPs showed similar kinetic and stoichiometric conditions in the SBR population behaviour after calibration of the models. The simulation results detected only a discrepancy to the ammonia online data during and shortly after shock loading under anoxic and anaerobic conditions that so far could not be adjusted by the ASM1 model. However, these differences did not severely affect the quality of the simulations nor the effluent flows. Additionally, in all cases a dynamic alpha factor curve occurred during the aeration phases that was verified by further oxygen transfer measurements. This might reveal new aspects for the process control, design and simulation of SBR WWTPs. A short lag phase was detected in many cases at the beginning of the first aeration phase.

Boosting nitrification with the BABE technology

2005 ◽  
Vol 52 (4) ◽  
pp. 63-70 ◽  
Author(s):  
D.H.J.G. Berends ◽  
S. Salem ◽  
H.F. van der Roest ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Low Cost ◽  
Treatment Plant ◽  
Full Scale ◽  
Nitrifying Bacteria ◽  
Stable Operation ◽  
Main Process ◽  
Model Studies ◽  
Full Scale Tests

Over the past years there has been a growing interest for compact, simple, low cost and robust technologies to upgrade wastewater treatment plants for nitrogen removal. The BABE (Bio Augmentation Batch Enhanced) technology is such a new concept. This patented system for biological treatment of sludge liquor – the effluent produced from digested sludge – uses a new principle, boosting the nitrifying bacteria in a side stream in such a way that the activated sludge in the main process is augmented. This augmentation increases the nitrification capacity of the wastewater treatment plant (wwtp). Experiments on a practical scale have demonstrated the effective and stable operation of the BABE technology. Model studies supported by the results of the full-scale tests showed that the technology can be applied in several situations, i.e. 1) introducing nitrification at high loaded wwtps; 2) enhancing nitrification at wwtps with incomplete nitrification; 3) enlarging denitrification at wwtps with complete nitrification. Most likely this year a full-scale application will be realized in the Netherlands at a wwtp with insufficient nitrification throughout the year.

scholarly journals Apparent oxygen half saturation constant for nitrifiers: genus specific, inherent physiological property, or artefact of colony morphology?

2018 ◽  
Author(s):  
Yingyu Law ◽  
Artur Matysik ◽  
Xueming Chen ◽  
Sara Swa Thi ◽  
Thi Quynh Ngoc Nguyen ◽  
...  
Keyword(s):  
Wastewater Treatment Plants ◽  
Volume Ratio ◽  
Domestic Wastewater ◽  
Physiological Property ◽  
Full Scale ◽  
Ammonia Oxidizing Bacteria ◽  
Low Oxygen ◽  
Half Saturation Constant ◽  
Nitrite Oxidizing Bacteria ◽  
Oxygenation Level

AbstractWe report that a singleNitrospirasublineage I OTU performs nitrite oxidation in several full-scale domestic wastewater treatment plants (WWTPs) in the tropics (29-31 °C). Contrary to the prevailing theory for the relationship between nitrite oxidizing bacteria (NOB) and ammonia oxidizing bacteria (AOB), members of theNitrospirasublineage I OTU had an apparent half saturation coefficient,Ks(app)lower than that of the full-scale domestic activated sludge cohabitant AOB (0.09 ± 0.02 g O2 m−3versus 0.3 ± 0.03 g O2 m−3). Paradoxically, NOB may thus thrive under conditions of low oxygen supply. Low dissolved oxygen (DO) conditions could enrich for and high aeration inhibit the NOB in a long-term lab-scale reactor. The relative abundance ofNitrospiragradually decreased with increasing DO until it was washed out. Nitritation was sustained even after the DO was lowered subsequently. Based on 3D-fluorescencein situhybridization (FISH) image analysis, the morphologies of AOB and NOB microcolonies responded to DO levels in accordance with their apparent oxygen half saturation constantKs(app). When exposed to the same oxygenation level, NOB formed densely packed spherical clusters with a low surface area-to-volume ratio compared to theNitrosomonas-like AOB clusters, which maintained a porous and non-spherical morphology. Microcolony morphology is thus a way for AOB and NOB to regulate oxygen exposure and sustain the mutualistic interaction. However, short-term high DO exposure can select for AOB and against NOB in full-scale domestic WWTPs and such population dynamics depend on which specific AOB and NOB species predominate under given environmental conditions.

Anaerobic Treatment of Low, Medium and High Strength Effluent in the Agro-industry

1999 ◽  
Vol 40 (8) ◽  
pp. 221-228 ◽  
Author(s):  
W. Driessen ◽  
P. Yspeert
Keyword(s):  
High Strength ◽  
Anaerobic Treatment ◽  
Full Scale ◽  
Processing Plant ◽  
Internal Circulation ◽  
Volumetric Loading ◽  
Two Stages ◽  
New Generation ◽  
Very High ◽  
Ic Technology

Based on the widely applied UASB system for anaerobic wastewater treatment a new generation of more advanced anaerobic reactor systems have recently been developed, according to the so-called expanded sludge bed concept. A successful version of this concept is the Internal Circulation (IC) reactor, characterized by the biogas separation in two stages within a reactor with a high height/diameter ratio and the gas-driven internal effluent circulation. The IC system can handle high upflow liquid and gas velocities, which makes treatment of low strength effluents at short hydraulic retention times, as well as treatment of high strength effluents at very high volumetric loading rates feasible. During the past years the IC technology has been successfully applied at full scale on a variety of industrial wastewaters. This article describes the design and operational results of three full scale anaerobic treatment plants with Internal Circulation reactors treating low, medium and high strength effluents from a dairy industry, food processing plant and brewery respectively.

Upgrading Wastewater Treatment Plants for Biological Nutrient Removal

1990 ◽  
Vol 22 (7-8) ◽  
pp. 53-60 ◽  
Author(s):  
B. Rabinowitz ◽  
T. D. Vassos ◽  
R. N. Dawson ◽  
W. K. Oldham
Keyword(s):  
Wastewater Treatment ◽  
Nutrient Removal ◽  
Wastewater Treatment Plants ◽  
Design Flow ◽  
Biological Nutrient Removal ◽  
Nitrogen And Phosphorus ◽  
Conventional Activated Sludge ◽  
Recent Developments ◽  
Removal Technology ◽  
Biological Nitrogen

A brief review of recent developments in biological nitrogen and phosphorus removal technology is presented. Guidelines are outlined of how current understanding of these two removal mechanisms can be applied in the upgrading of existing wastewater treatment plants for biological nutrient removal. A case history dealing with the upgrading of the conventional activated sludge process located at Penticton, British Columbia, to a biological nutrient removal facility with a design flow of 18,200 m3/day (4.0 IMGD) is presented as a design example. Process components requiring major modification were the headworks, bioreactors and sludge handling facilities.

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.

Automatic buffer capacity based sensor for effluent quality monitoring

1996 ◽  
Vol 33 (1) ◽  
pp. 81-87
Author(s):  
L. Van Vooren ◽  
P. Willems ◽  
J. P. Ottoy ◽  
G. C. Vansteenkiste ◽  
W. Verstraete
Keyword(s):  
Wastewater Treatment ◽  
Buffer Capacity ◽  
Wastewater Treatment Plants ◽  
Data Interpretation ◽  
Full Scale ◽  
Quality Monitoring ◽  
Effluent Quality ◽  
Capacity Curves ◽  
On Line

The use of an automatic on-line titration unit for monitoring the effluent quality of wastewater plants is presented. Buffer capacity curves of different effluent types were studied and validation results are presented for both domestic and industrial full-scale wastewater treatment plants. Ammonium and ortho-phosphate monitoring of the effluent were established by using a simple titration device, connected to a data-interpretation unit. The use of this sensor as the activator of an effluent quality proportional sampler is discussed.

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