scholarly journals Scaling-Up and Long-Term Operation of a Full-Scale Two-Stage Partial Nitritation-Anammox System Treating Landfill Leachate

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 800
Author(s):  
Albert Magrí ◽  
Maël Ruscalleda ◽  
Albert Vilà ◽  
Tiago R. V. Akaboci ◽  
M. Dolors Balaguer ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Research Group ◽  
Biological Treatment ◽  
Scale Up ◽  
Full Scale ◽  
Landfill Site ◽  
Two Stage ◽  
Partial Nitritation ◽  
N Removal

(1) Background: Biological treatment of leachate in landfill sites using anaerobic ammonium oxidation (anammox) is challenging because of the intrinsic characteristics of this complex wastewater. In this work, the scale-up and subsequent full-scale implementation of the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) are presented as a case study to achieve long-term nitrogen (N) removal from mature leachate mostly through a completely autotrophic pathway. (2) Methods: The treatment system consists of two sequencing batch reactors (SBRs) running in series to individually operate partial nitritation (PN) and anammox (A). Following biological treatment, physicochemical oxidation (i.e., Fenton-based process) was used to remove the remaining non-biodegradable organic matter. A cost analysis comparative was conducted in relation to the former technology used on-site for treating the leachate. (3) Results: The scale-up of the process from pilot- to full-scale was successfully achieved, finally reaching an average removal of 7.4 kg N/d. The composition of the leachate changed over time, but especially once the landfill site stopped receiving solid waste (this fact involved a marked increase in the strength of the leachate). The adjustment of the alkalinity-to-ammonium ratio before feeding PN-SBR helped to improve the N-removal efficiency. Values of conductivity above 25 mS/cm in A-SBR could negatively affect the performance of the anammox process, making it necessary to consider a dilution strategy according to the on-line monitoring of this parameter. The analysis of the operational costs showed that by implementing the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) in the landfill site, savings up to 32% were achievable. (4) Conclusions: Treatment of mature landfill leachate in such a two-stage PN-A system was demonstrated as feasible and economically appealing despite the complexity of this industrial wastewater. Accurate expert supervision of the process was a key factor to reaching good performances.

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.

Storage without nitrite or nitrate enables the long-term preservation of full-scale partial nitritation/anammox sludge

2021 ◽  
pp. 151330
Author(s):  
Weiqiang Zhu ◽  
Michiel Van Tendeloo ◽  
Yankai Xie ◽  
Marijn Juliaan Timmer ◽  
Lai Peng ◽  
...  
Keyword(s):  
Full Scale ◽  
Partial Nitritation ◽  
Long Term Preservation

Long term experience with the nutrient limited BAS process for treatment of forest industry wastewaters

2007 ◽  
Vol 55 (6) ◽  
pp. 89-97 ◽  
Author(s):  
Å. Malmqvist ◽  
T. Welander ◽  
L.E. Olsson
Keyword(s):  
Biological Treatment ◽  
Operating Mode ◽  
Full Scale ◽  
Forest Industry ◽  
Process Stability ◽  
Sludge Characteristics ◽  
Long Term Treatment ◽  
Different Types ◽  
Sludge Production

The nutrient limited biofilm-activated sludge (BAS) process was developed with the aim to ensure maximum biological treatment efficiency in combination with good process stability, low sludge production and minimum effluent concentration of nutrients. The first full scale nutrient limited BAS (NLBAS) processes were implemented at Södra Cell Värö and Stora Enso Hylte in 2002. Since then another three full scale installations have been built. The aim of this study was to investigate and summarise the long-term treatment results, process stability, sludge production and sludge characteristics for the five full scale NLBAS processes. It was of particular interest to compare the nutrient limited operating mode with regard to the different types of production and wastewater that the mills represent (kraft, TMP and newsprint, bleached CTMP). The study showed that after the initial start-up period, which varied from a couple of weeks to three to four months, all plants meet their respective discharge limits. The sludge production for the different plants varies between 0.07 and 0.15 kg TSS/kg COD and the sludge characteristics are with few exceptions excellent. In conclusion, the nutrient limited BAS process is suitable for both upgrades and new installations of biological treatment for different types of forest industry wastewaters.

Long-term performance and microbial ecology of a two-stage PN–ANAMMOX process treating mature landfill leachate

2014 ◽  
Vol 159 ◽  
pp. 404-411 ◽  
Author(s):  
Huosheng Li ◽  
Shaoqi Zhou ◽  
Weihao Ma ◽  
Pengfei Huang ◽  
Guotao Huang ◽  
...  
Keyword(s):  
Microbial Ecology ◽  
Landfill Leachate ◽  
Two Stage ◽  
Mature Landfill Leachate ◽  
Long Term Performance ◽  
Term Performance ◽  
Anammox Process

First full-scale combined MBBR, coagulation, flocculation, Discfilter plant with phosphorus removal in France

2019 ◽  
Vol 15 (1) ◽  
pp. 19-27 ◽  
Author(s):  
P. Kängsepp ◽  
M. Sjölin ◽  
A. G. Mutlu ◽  
B. Teil ◽  
C. Pellicer-Nàcher
Keyword(s):  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Biological Treatment ◽  
Suspended Solids ◽  
Full Scale ◽  
Small Scale ◽  
Dissolved Air Flotation ◽  
Biofilm Reactors ◽  
Dissolved Air

Abstract The suspended solids (SS) concentrations in effluent from moving bed biofilm reactors (MBBRs) used for secondary biological treatment can be up to 500 mg/L. Microscreens (Drumfilters or Discfilters) can be used as alternatives to traditional clarification or dissolved air flotation to remove SS and total phosphorus (TP). This study shows how a small-scale municipal WWTP for 5,700 population equivalent (PE) can be upgraded to 12,000 PE by combining MBBR with coagulation-flocculation tanks and a Discfilter with a total footprint of 160 m2. This long-term investigation demonstrated that even though influent turbidity (range 146–431 NTU) and flow (25–125 m3/h) varied considerably, very low effluent turbidities (below 10 NTU) could be achieved continuously. Furthermore, this compact treatment system can provide average reductions of ammonium (NH4-N) from 19 to 0.04 mg/L, COD from 290 to 10 mg/L, and TP from 4.5 to 0.3 mg/L. The results show that effluent requirements can be reached by combining MBBR, coagulation-flocculation and disc filtration at full scale, without a primary clarifier upstream of MBBR.

scholarly journals Influence of Leachate and Nitrifying Bacteria on Photosynthetic Biogas Upgrading in a Two-Stage System

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1503
Author(s):  
Luis Fernando Saldarriaga ◽  
Fernando Almenglo ◽  
Domingo Cantero ◽  
Martín Ramírez
Keyword(s):  
Landfill Leachate ◽  
Scale Up ◽  
Economic Feasibility ◽  
Nitrifying Bacteria ◽  
Co2 Uptake ◽  
Co2 Absorption ◽  
Nutrient Source ◽  
Two Stage ◽  
Biogas Upgrading ◽  
G Ratio

Photosynthetic biogas upgrading using two-stage systems allows the absorption of carbon dioxide (CO2) in an absorption unit and its subsequent assimilation by microalgae. The production of microalgae requires large amounts of nutrients, thus making scale-up difficult and reducing economic feasibility. The photosynthetic process produces oxygen (O2) (1 mol per mol of CO2 consumed), which can be desorbed into purified biogas. Two-stage systems reduce its impact but do not eliminate it. In this study, we test the use of landfill leachate as a nutrient source and propose a viable and economical strategy for reducing the O2 concentration. First, the liquid/gas (L/G) ratio and flow mode of the absorber were optimized for 20% and 40% CO2 with COMBO medium, then landfill leachate was used as a nutrient source. Finally, the system was inoculated with nitrifying bacteria. Leachate was found to be suitable as a nutrient source and to result in a significant improvement in CO2 absorption, with outlet concentrations of 0.01% and 0.6% for 20% and 40% CO2, respectively, being obtained. The use of nitrifying bacteria allowed a reduction in dissolved oxygen (DO) concentration, although it also resulted in a lower pH, thus making CO2 uptake slightly more difficult.

The Necessity for Scale Up in R&D: Approach for Waste Immobilisation in Cement by BNFL

1995 ◽  
Vol 412 ◽  
Author(s):  
Graham A Fairhall ◽  
Eric W Miller
Keyword(s):  
Material Properties ◽  
Large Scale ◽  
Scale Up ◽  
Scaling Up ◽  
Full Scale ◽  
Physical Parameters ◽  
Wide Range ◽  
Regulatory Bodies ◽  
Major Factors

AbstractThe full scale processing of nuclear wastes immobilised in cement utilises a wide range of chemical and physical parameters. The success of this work however, involves many factors and material properties which are affected by the actual scaling up processes. The paper outlines the approach and experience gained by BNFL to recognise and evaluate the major factors involved in order to successfully produce large scale stable products acceptable to the appropriate regulatory bodies and suitable for long term disposal.

Chemical oxidation for the treatment of leachate-process comparison and results from full-scale plants

1997 ◽  
Vol 35 (4) ◽  
pp. 249-256 ◽  
Author(s):  
Martin Steensen
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Consumption ◽  
Landfill Leachate ◽  
Biological Treatment ◽  
Fixed Bed ◽  
Chemical Oxidation ◽  
Full Scale ◽  
Organic Substances ◽  
Process Comparison ◽  
Uv Ozone

Before landfill leachate is discharged, extensive removal of organic substances is required which cannot be achieved by biological treatment only. Chemical oxidation has the advantage of the substances being almost completely converted. Hydrogen peroxide/UV, ozone and ozone/fixed bed catalyst processes were used for the purification of three biologically pre-treated leachates. With all processes sufficient purification levels were achieved. However, the required energy consumption is largest with the hydrogen peroxide/UV process. If chemical oxidation is combined with biological purification, the discharge quality can be increased at decreased oxidant consumption.

Sign in / Sign up

Export Citation Format

Share Document