Full-scale application of the SHARON process for treatment of rejection water of digested sludge dewatering

2001 ◽  
Vol 43 (11) ◽  
pp. 127-134 ◽  
Author(s):  
J. W. Mulder ◽  
M. C. M. van Loosdrecht ◽  
C. Hellinga ◽  
R. van Kempen
Keyword(s):  
Operating Temperature ◽  
Ph Control ◽  
Full Scale ◽  
Sludge Dewatering ◽  
Digested Sludge ◽  
Highly Active ◽  
N Removal ◽  
Conversion Rates ◽  
First Results ◽  
Sharon Process

At the Rotterdam Dokhaven WWTP the first full-scale application of the SHARON process has been constructed. In the SHARON process, rejection water from dewatering of digested sludge is treated for N-removal. It concerns a highly active process operating without sludge retention. The single tank reactor is intermittently aerated. Due to differences in growth rate nitrite oxidisers are washed out of the system while ammonia oxidisers can be maintained, resulting in N-removal over nitrite. The SHARON process has been selected after comparison with several other techniques. The feed of the SHARON tank is concentrated, with ammonia concentrations over 1 g N/l. The first results show that conversion rates of 90% are quite possible with N-removal mainly via the nitrite route. The process was shown to be stable. Due to the high inlet concentrations pH control is of great importance, preventing process inhibitions. The acidifying effect of nitrification can be compensated completely by CO2 stripping during aeration and by denitrification. Heat production by biological conversions appeared to be significant, due to the high inlet concentrations, and contributes to the optimal operating temperature of 30-40°C.

Overview: full scale experience of the SHARON® process for treatment of rejection water of digested sludge dewatering

2001 ◽  
Vol 44 (1) ◽  
pp. 145-152 ◽  
Author(s):  
R. van Kempen ◽  
J. W. Mulder ◽  
C. A. Uijterlinde ◽  
M. C.M. Loosdrecht
Keyword(s):  
Growth Rate ◽  
Heat Production ◽  
Operating Temperature ◽  
Ph Control ◽  
Active Process ◽  
Sludge Dewatering ◽  
Optimal Operating ◽  
Digested Sludge ◽  
N Removal ◽  
Conversion Rates

A SHARON® system has been constructed at the Utrecht WWTP and at the Rotterdam Dokhaven WWTP. In the SHARON® process rejection water from dewatering of digested sludge is treated for N-removal. It concerns a high active process operating without sludge retention. Due to differences in growth rate nitrite oxidisers can be washed out of the system while ammonia oxidisers are maintained, resulting in N-removal over nitrite. The SHARON® process was selected in competition with several other techniques. The feed of a SHARON® system is concentrated, with ammonia concentrations ranging from 0.5 to 1.5 g N/l. The results show that conversion rates of 90% are well possible with N-removal mainly via the nitrite route. The process was shown to be stable. Due to the high ammonium influent concentrations pH control is of great importance, preventing process inhibitions. The acidifying effect of nitrification can be compensated completely by CO2 stripping during aeration and by denitrification. Heat production by biological conversions is significant, due to the high inlet concentrations, and contributes to the optimal operating temperature of 30-40°C.

scholarly journals Two Decades of Experience with the Granular Sludge-Based ANAMMOX® Process Treating Municipal and Industrial Effluents

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1207
Author(s):  
Willie Driessen ◽  
Tim Hendrickx
Keyword(s):  
Stable Process ◽  
Granular Sludge ◽  
Industrial Effluents ◽  
Full Scale ◽  
Ammoniacal Nitrogen ◽  
Highly Active ◽  
N Removal ◽  
Hydrolysis Process ◽  
Granular Biomass ◽  
Anammox Process

This paper is a review of 20 years of full-scale experience with the granular sludge-based ANAMMOX process. The ANAMMOX process is a biological deammonification process for energy-efficient removal of ammoniacal nitrogen, which has been successfully applied on dewatering reject liquors from biosolids sludge digesters (e.g., mesophilic anaerobic digestions, codigestion, thermal sludge hydrolysis process (THP)) and nutrient-rich anaerobically treated industrial effluents (e.g., fermentation industry, food industry). The ANAMMOX process is a continuously operated biological process using granular biomass. The highly active concentrated granular biomass allows for compact reactor systems and a fast start-up. Long term operations of various case studies show stable process performance of full-scale reactors treating municipal and industrial effluents, achieving ammoniacal nitrogen (NH4-N) removal in excess of 90% at low and high loading rates up to 2.5 kgNH4-N/(m3·d). Some special aspects (e.g., micro-nutrients, inhibition, alkalinity consumption) of treating various wastewaters are discussed in detail. The ANAMMOX process is demonstrated to be resilient in handling process upsets and off-spec wastewater composition.

scholarly journals Full scale optimisation of sludge dewatering and phosphate removal at Harnaschpolder wwtp (The Hague, NL)

2018 ◽  
Vol 13 (1) ◽  
pp. 21-29 ◽  
Author(s):  
M. Mulder ◽  
K. Appeldoorn ◽  
P. Weij ◽  
R. van Kempen
Keyword(s):  
Magnesium Hydroxide ◽  
Full Scale ◽  
Phosphate Removal ◽  
Iron Chloride ◽  
Sludge Dewatering ◽  
Digested Sludge ◽  
Effluent Quality ◽  
Reject Water ◽  
Dewatered Sludge ◽  
Solids Content

Abstract At Harnaschpolder wwtp phosphate removal from wastewater and sludge dewatering is optimised by dosing magnesium hydroxide to digested sludge. To optimise sludge dewatering and phosphate removal, a full-scale test has been executed since August 2015 using temporary equipment. In this test magnesium hydroxide is added to the digested sludge buffer. Significant positive results are achieved. An excellent quality of the reject water is obtained, through which the phosphorus load in this reject water returned to head of works is negligible. This decrease in combination with other optimisations are beneficial for the biological phosphorus removal process. In 2016 the phosphorus effluent quality remained constant, while 42% less iron chloride was added to meet the legal phosphorus effluent quality requirements (yearly moving average Ptotal < 1.0 mg P/l). The polymer usage decreased by 25% and the year average dry matter content of the dewatered sludge increased from 22% in 2014 to 24% in 2016. Struvite scaling or blockage is avoided in piping, pumps or dewatering equipment, through optimised control of dosage of magnesium hydroxide. The full-scale test results prove that the addition of magnesium hydroxide to digested sludge leads to a significant cost reduction and major environmental benefits. In 2017 a permanent installation will be realised. The magnesium hydroxide dosage will be further optimised based on lessons learnt. Also an improved operation control of sludge dewatering is possible through additional in-line measurements for dry solids content of dewatered sludge. It is therefore expected that results will further improve concerning the use of iron chloride and polymers, dry solids content of dewatered sludge and phosphate effluent quality. Through this optimisation, the operating costs1 of Harnaschpolder wwtp are reduced by over 4%. The return on investment is estimated at 1.5 years.

Model-based evaluation of a new upgrading concept for N-removal

2002 ◽  
Vol 45 (6) ◽  
pp. 169-176 ◽  
Author(s):  
S. Salem ◽  
D. Berends ◽  
J.J. Heijnen ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Mathematical Modelling ◽  
Scale Up ◽  
Treatment Plant ◽  
Ammonia Concentration ◽  
Pilot Scale ◽  
Full Scale ◽  
Model Based ◽  
N Removal ◽  
Quantitative Basis ◽  
Treatment Concepts

Mathematical modelling is considered a time and cost-saving tool for evaluation of new wastewater treatment concepts. Modelling can help to bridge the gap between lab and full-scale application. Bio-augmentation can be used to obtain nitrification in activated sludge systems with a limited aerobic sludge retention time. In the present study the potential for augmenting the endogenous nitrifying population is evaluated. Implementing a nitrification reactor in the sludge return line fed with sludge liquor with a high ammonia concentration leads to augmentation of the native nitrifying population. Since the behaviour of nitrifiers is relatively well known, a choice was made to evaluate this new concept mainly based on mathematical modelling. As an example an existing treatment plant (wwtp Walcheren, The Netherlands) that needed to be upgraded was used. A mathematical model, based on the TUDP model and implemented in AQUASIM was developed and used to evaluate the potential of this bioaugmentation in the return sludge line. A comparison was made between bio-augmentation and extending the existing aeration basins and anoxic tanks. The results of both modified systems were compared to give a quantitative basis for evaluation of benefits gained from such a system. If the plant is upgraded by conventional extension it needs an increase in volume of about 225%; using a bioaugmentation in the return sludge line the total volume of the tanks needs to be expanded by only 75% (including the side stream tanks). Based on the modelling results a decision was made to implement the bioaugmentation concept at full scale without further pilot scale testing, thereby strongly decreasing the scale-up period for this process.

A Highly Active Ag/Alumina Catalytic Converter for Continuous HC-SCR During Lean-Burn Conditions: From Laboratory to Full-Scale Vehicle Tests

2004 ◽  
Vol 30/31 ◽  
pp. 27-30 ◽  
Author(s):  
F. Klingstedt ◽  
K. Eränen ◽  
L.-E. Lindfors ◽  
S. Andersson ◽  
L. Cider ◽  
...  
Keyword(s):  
Catalytic Converter ◽  
Full Scale ◽  
Lean Burn ◽  
Highly Active

Nitrogen removal from digester supernatant via nitrite - SBR or SHARON?

2003 ◽  
Vol 48 (8) ◽  
pp. 9-18 ◽  
Author(s):  
C. Fux ◽  
K. Lange ◽  
A. Faessler ◽  
P. Huber ◽  
B. Grueniger ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Flow Reactor ◽  
Batch Reactor ◽  
Treatment Plant ◽  
Full Scale ◽  
Municipal Wastewater Treatment ◽  
Nitrite Oxidation ◽  
High Concentrations ◽  
Nitrite Nitrate ◽  
Sharon Process

Separate biological elimination of nitrogen from the digester supernatant of a municipal wastewater treatment plant (WWTP) was investigated in pilot and full-scale plants. Denitrification mainly via nitrite was achieved in a sequencing batch reactor (SBR) and a continuous flow reactor (CSTR or SHARON). Suppression of nitrite oxidation in the SBR was feasible at short aerobic/anaerobic intervals allowing for immediate denitrification of the produced nitrite. Nitrate production could also be stopped by exposing the biomass to anaerobic conditions for 11 days. Temporarily high concentrations (up to 80 gNH3-Nm-3) of free ammonia could not be considered as the major reason for inhibiting nitrite oxidation. In a full-scale SBR plant 90% of the nitrogen load was denitrified in a total hydraulic retention time (HRT) of 1.6 days and with a sludge age between 15 and 20 days. Ethanol and methanol were used for denitrification. The specific average substrate consumption was 2.2 gCODdosedg-1Nremoved with an effective biomass yield of 0.2 gCODbiomassg-1CODdosed. No dosing with base was required. In the SHARON process full nitrogen elimination was achieved only with a total HRT greater than 4 days at 29°C. The overall costs were estimated at €1.4 kg-1Nremoved for the SBR and €1.63 kg-1Nremoved in SHARON mode, respectively. The SHARON process is simple in operation (CSTR) but the tank volume has to be significantly greater than in SBR.

The sharon process: an innovative method for nitrogen removal from ammonium-rich waste water

1998 ◽  
Vol 37 (9) ◽  
pp. 135-142 ◽  
Author(s):  
C. Hellinga ◽  
A. A. J. C. Schellen ◽  
J. W. Mulder ◽  
M. C. M. van Loosdrecht ◽  
J. J. Heijnen
Keyword(s):  
Waste Water ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Ammonia Removal ◽  
Full Scale ◽  
Waste Water Treatment Plant ◽  
University Of Technology ◽  
In The Beginning ◽  
Sharon Process

A new biological process for ammonia removal from flows containing hundreds to thousands milligrams NH+4 per litre has been developed at the Delft University of Technology. The SHARON process operates at a high temperature (30–40 °C) and pH (7–8). The process is performed without sludge retention. This enables the prevention of nitrite oxidation, leading to lower operational costs. Denitrification is used to control the pH. A full scale plant was designed (1500 m3) based on kinetic and stoichiometric parameters determined at 1.5 1. scale and model predictions. Total costs are estimated at about $1.7 per kg removed NH4+-N. The first full scale SHARON plant will be operational at the Dokhaven waste water treatment plant in Rotterdam in the beginning of 1998. This contribution focuses on the principles of the process and evaluates conditions for which application seems feasible.

Coupling the SHARON process with Anammox: Model-based scenario analysis with focus on operating costs

2005 ◽  
Vol 52 (4) ◽  
pp. 107-115 ◽  
Author(s):  
E.I.P. Volcke ◽  
S.W.H. Van Hulle ◽  
B.M.R. Donckels ◽  
M.C.M. van Loosdrecht ◽  
P.A. Vanrolleghem
Keyword(s):  
Flow Rate ◽  
Control Strategy ◽  
Air Flow ◽  
Operating Cost ◽  
Ph Control ◽  
Ammonia Concentration ◽  
Air Flow Rate ◽  
Cost Index ◽  
Sludge Digestion ◽  
Sharon Process

The combined SHARON-Anammox process for treating wastewater streams with high ammonia concentration is discussed. Partial nitritation in the SHARON reactor should be performed to such an extent that an Anammox-optimal nitrite:ammonium ratio is generated. The SHARON process is typically applied to sludge digestion rejection water in order to relieve the ammonium load recycled to the main plant.A simulation study for realistic influent conditions on a SHARON reactor with a fixed volume and operated with constant air flow rate reveals that the actual nitrite:ammonium ratio might deviate significantly from the ideal ratio and might endanger operation of the subsequent Anammox reactor. It is further examined how the nitrite:ammonium ratio might be optimized. A cascade pH control strategy and a cascade O2 control strategy are tested. Simulation results are presented and the performance of the different strategies is assessed and quantified in an economic way by means of an operating cost index. Best results are obtained by means of cascade feedback control of the SHARON effluent nitrite:ammonium ratio through setting an O2-set-point that is tracked by adjusting the air flow rate.

Sludge dewatering and stabilization in drying reed beds: Characterization of three full-scale systems in Catalonia, Spain

2009 ◽  
Vol 100 (17) ◽  
pp. 3882-3890 ◽  
Author(s):  
Enrica Uggetti ◽  
Esther Llorens ◽  
Anna Pedescoll ◽  
Ivet Ferrer ◽  
Roger Castellnou ◽  
...  
Keyword(s):  
Full Scale ◽  
Sludge Dewatering ◽  
Reed Beds
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