Modeling and Optimization of Nutrient Recovery from Wastes

Vaneeckhaute, Céline; Meers, Erik; Belia, Evangelina; Vanrolleghem, Peter

doi:10.1002/9781118921487.ch8-1

Cited by 3 publications

(6 citation statements)

References 86 publications

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Section: Results and Discussionmentioning

confidence: 99%

“…In addition to chemical composition, the physical characteristics of the fertilizer, including particle size distribution and morphology, play an important role in agricultural application. The particle size influences the fertilizer’s effectiveness as well as its processing and environmental aspects . A conventional fertilizer has a particle size of 1–4 mm …”

Section: Results and Discussionmentioning

confidence: 99%

“…For the successful implementation of the HTL-based fertilizer in agriculture, its properties should meet fertilizer regulations and be comparable with conventional fertilizers. 75 In this work, the quality of the product is discussed with regard to the European Union regulations. The recovered precipitates from the inlet-mixed solution from the HTL byproducts of sewage sludge in the absence of CA (L1 SSL −L4 SSL ) and the HTL byproducts of manure (L6 M −L9 M ) displayed slight variations but similar characteristics (Table 3).…”

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

“…The particle size influences the fertilizer's effectiveness as well as its processing and environmental aspects. 75 A conventional fertilizer has a particle size of 1−4 mm. 75 Figure 4 demonstrates that the medium particle size (d 50 ) for the precipitate, which was produced in L9 M from the HTL byproducts of manure, was 16 μm.…”

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

“…75 A conventional fertilizer has a particle size of 1−4 mm. 75 Figure 4 demonstrates that the medium particle size (d 50 ) for the precipitate, which was produced in L9 M from the HTL byproducts of manure, was 16 μm. In experiment L5 SSL , in the presence of CA, the d 50 was 11 μm.…”

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

See 4 more Smart Citations

Valorization of Byproducts from Hydrothermal Liquefaction of Sewage Sludge and Manure: the Development of a Struvite-Producing Unit for Nutrient Recovery

2021

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Hydrothermal liquefaction (HTL) presents a promising technology to recover energy from sewage sludge and manure as bio-crude oil. The liquid and solid phases after HTL are considered as byproducts; however, the latter is rich in nutrients, which offers a possibility for nutrient recovery and manufacturing of valuable products. This study focuses on the simultaneous recovery of phosphate and ammoniacal nitrogen as struvite by combining the liquid HTL byproduct and leachate from the solid HTL byproduct. To implement a flexible struvite-producing unit, the effect of an inlet-mixed solution composition on the struvite precipitation was investigated on a laboratory scale and preferable operating conditions were identified. These operating conditions were used afterward to evaluate and adapt an air-agitated system for struvite precipitation subsequent to the HTL production chain. Moreover, the precipitation process in the air-agitated system was evaluated using synthetic model solutions compared to real HTL byproducts to offer insight into the effect of impurities on the product quality. The product, which has a struvite content of more than 75 wt %, was manufactured from the HTL byproducts of manure and sewage sludge as well. It has potential for use as a fertilizer based on its elemental composition but the use of citric acid was found to be effective to improve the quality of the product, especially of sewage sludge. The results showed that the air-agitated system could be effectively implemented in the HTL production chain. It has the potential to enhance features of the product, leading to a ready-to-use fertilizer in shape (particle size) and quality (struvite content).

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

Section: Effect Of Inlet-mixed Solution Composition On Htl-based Stru...mentioning

confidence: 99%

See 3 more Smart Citations

Valorization of Byproducts from Hydrothermal Liquefaction of Sewage Sludge and Manure: the Development of a Struvite-Producing Unit for Nutrient Recovery

2021

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Ammonia Recovery with Sweeping Gas Membrane Distillation: Energy and Removal Efficiency Analysis

2022

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Membrane distillation (MD) is a thermally driven phase separation process. In sweeping gas membrane distillation (SGMD), an air stream is utilized to capture and remove volatile compounds on the sweeping gas stream. SGMD is an attractive, compact, and efficient process to replace conventional ammonia removal processes such as air stripping or to reduce energy consumption related to nutrient removal of existing processes in wastewater treatment plants. In this study, we present an energetic analysis of humidity-assisted SGMD to remove ammonia from wastewater. We developed a numerical simulation to optimize the design and operating conditions (inlet feed temperature, air flow rate, brine flow rate, and humidity level of the sweeping gas stream) of the process. We show that operating under multiple stages in series the process can achieve an ammonia removal rate greater than 90% at high air-to-water ratios while maintaining low energy consumption. SGMD is a promising way to separate ammonia from wastewater compared to conventional ammonia stripping processes.

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Improving Prediction of Nutrient Recovery via Struvite Precipitation from Organic Waste Digestate

Aldaach,

Zaki,

Orner

2024

Environmental Engineering Science

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Modeling and Optimization of Nutrient Recovery from Wastes

Cited by 3 publications

References 86 publications

Valorization of Byproducts from Hydrothermal Liquefaction of Sewage Sludge and Manure: the Development of a Struvite-Producing Unit for Nutrient Recovery

Valorization of Byproducts from Hydrothermal Liquefaction of Sewage Sludge and Manure: the Development of a Struvite-Producing Unit for Nutrient Recovery

Ammonia Recovery with Sweeping Gas Membrane Distillation: Energy and Removal Efficiency Analysis

Improving Prediction of Nutrient Recovery via Struvite Precipitation from Organic Waste Digestate

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