Impact of location of CaCO3 precipitation on the development of intact anaerobic sludge

Langerak, E.P.A. van; Ramaekers, H; Wiechers, Johann W.; Veeken, A.H.M.; Hamelers, H.V.M.; Lettinga, G.

doi:10.1016/s0043-1354(99)00154-2

Cited by 80 publications

(45 citation statements)

References 25 publications

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“…In addition, minerals precipitation causes inorganic scale formation which is a well-known maintenance problem [33] and can negatively impact biological processes occurring in water treatment streams, such as in anaerobic sludge blanket reactors treating pulp and paper wastewater [34,35]. On the other hand, precipitation can also have positive impacts in wastewater treatment, for example sulfate and sulfide precipitation which limits the occurrence of the toxic dissolved sulfide in anaerobic digesters [36,37], or with nutrient recovery as mineral fertilizers [38].…”

Section: Precipitationmentioning

confidence: 99%

Perspectives on Resource Recovery from Bio-Based Production Processes: From Concept to Implementation

Udugama

Mansouri

Mitić³

et al. 2017

Processes

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Abstract:Recovering valuable compounds from waste streams of bio-based production processes is in line with the circular economy paradigm, and is achievable by implementing "simple-to-use" and well-established process separation technologies. Such solutions are acceptable from industrial, economic and environmental points of view, implying relatively easy future implementation on pilot-and full-scale levels in the bio-based industry. Reviewing such technologies is therefore the focus here. Considerations about technology readiness level (TRL) and Net Present Value (NPV) are included in the review, since TRL and NPV contribute significantly to the techno-economic evaluation of future and promising process solutions. Based on the present review, a qualitative guideline for resource recovery from bio-based production processes is proposed. Finally, future approaches and perspectives toward identification and implementation of suitable resource recovery units for bio-based production processes are discussed.

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Section: Precipitationmentioning

confidence: 99%

Perspectives on Resource Recovery from Bio-Based Production Processes: From Concept to Implementation

Udugama

Mansouri

Mitić³

et al. 2017

Processes

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“…For example, extraction of SiO 2 from the first vessel may involve new reactor configurations. In addition, precipitation of carbonate minerals in the second stage results in higher amounts of residue production which can also contribute to the operational costs (Van Langerak et al, 2000).…”

Section: Advantages Of Biological Mineral Carbonation Of Co 2 Comparementioning

confidence: 99%

“…the k l a value can be modified by changing the agitation rate, size of sparging bubbles, and vessel geometry such as reactor height or diameter. Adjustment of pH of acid producing biotechnological systems by changing the carbonate system equilibrium has been practiced in other studies as well, for example aeration of solutions having high carbonate contents caused an increase of pH (El-Mamouni et al, 1995;Eshchar et al, 2006;Kim et al, 2004;Van Langerak et al, 2000) or regulating the solutions alkalinity by varying the pCO 2 (Watten et al, 2007).…”

Section: Practical Application Of Caco 3 In Biotechnological Processesmentioning

confidence: 99%

“…In addition, usage of CaCO 3 results in a self-regulating pH system as the pH of the system cannot reach higher than 8.5 due to the nature of CaCO 3 excluding the requirement for active pH-control through base dosage. It is important to know that using calcium based alkalinity in an acid producing process, may induce massive CaCO 3 precipitation in a subsequent processing step where the organic acids are consumed in for example the methanogenic process of the anaerobic digestion process (Salek et al, 2013a;Van Langerak et al, 2000). This may impose operational problems, but when operated adequately can also be seen as an opportunity to regenerate alkalinity and exclude the need for continuous supply of alkalinity from external sources.…”

Section: Practical Application Of Caco 3 In Biotechnological Processesmentioning

confidence: 99%

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Mineral CO2 sequestration by environmental biotechnological processes

Salek

Kleerebezem

Jonkers

et al. 2013

Trends in Biotechnology

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“…However, since the available surface area for individual mineral phases in wastewater is difficult or impossible to determine, a lumped growth rate constant has been commonly used (Batstone and Keller 2003, Musvoto et al 2000a, van Langerak et al 2000. In a study of calcium carbonate crystallization, the rate of Ca +2 removal from solution was found to be directly proportional to the mass of crystals present in the water (Wiechers et al 1975).…”

Section: Precipitation Rate Expressionmentioning

confidence: 99%

Dynamic modelling of minerals precipitation in wastewater treatment

Mbamba¹

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In wastewater treatment, there is an increasing focus on nutrient and energy recovery and a reduction in energy consumption to counter climate change. Because of this, integrated mathematical modelling platforms are required to support plant-wide developments making use of emerging, resilient and environmental-friendly technologies. A reliable model description of a wastewater treatment plant should include both biology and physico-chemistry. However, existing standard models used across the wastewater sector have a biological focus with over-simplified descriptions of important physicochemistry, especially with minerals precipitation which is a very important class of physicochemical reactions.As part of development of a more widely applicable physicochemical framework, this thesis sought to identify a suitable minerals precipitation modelling approach that could give reasonable results in mainstream use with wastewater treatment. This research aim was approached in three steps. Firstly a review of available modelling approaches suggested a simple equilibrium kinetic-based modelling approach could be feasible. This approach was then validated in a simple system of calcite in synthetic solutions using pH titration experiments with the reliable Constant Composition Method (CCM).Further statistical analysis focused on clarifying key environmental factors that influence calcite precipitation to determine whether these are necessary to include in a model. Secondly, the proposed model approach was further tested on different types of wastewater and for multiple parallel precipitation reactions. Experiments included dynamic titration or aeration with synthetic wastewater and real wastewater. Thirdly, the general physicochemical modelling approach was implemented in a plant-wide platform together with standard biological models, namely activated sludge model No 2 (ASM2d) and Anaerobic Digestion Model No. 1 (ADM1). The plant-wide model evaluation compared simulations with real data from a full-scale wastewater treatment plant, and used steadystate, dynamic and scenario analyses to test the model performance.Experimental evidence for calcite precipitating in synthetic aqueous solutions, suggested that minerals precipitation kinetics could be reliably described with a 1 st order dependency on mineral Further testing for multi-species systems in real wastewater indicated that precipitation was dominated by the mineral struvite, forming together with varied and minor amounts of calcium phosphate and some calcium carbonate. Kinetic rate coefficients (kcryst), which were statistically fitted, were generally in the range 0.35-11.6 h -1 with 95% confidence intervals of 10-80% relative.The results confirmed that the baseline model approach provided a statistically good fit of measured pH, dissolved calcium, magnesium, total inorganic carbon and phosphate. With this application, the precipitation modelling approach offered the advantage of only requiring a minimal number of empirical fitted parameters (kcryst values), res...

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Impact of location of CaCO3 precipitation on the development of intact anaerobic sludge

Cited by 80 publications

References 25 publications

Perspectives on Resource Recovery from Bio-Based Production Processes: From Concept to Implementation

Perspectives on Resource Recovery from Bio-Based Production Processes: From Concept to Implementation

Mineral CO2 sequestration by environmental biotechnological processes

Dynamic modelling of minerals precipitation in wastewater treatment

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