Immobilization of phosphorus in cow manure during hydrothermal carbonization

Dai, Lichun; Tan, Furong; Wu, Bo; He, Mingxiong; Wang, Wenguo; Tang, Xiaoyu; Hu, Qichun; Zhang, Min

doi:10.1016/j.jenvman.2015.04.009

Cited by 127 publications

(60 citation statements)

References 36 publications

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“…Similar decrease in organic P after pyrolysis was also observed for manures based on chemical 255 extraction (Dai et al, 2015). 256 257…”

Section: P Speciation Changes During Pyrolysis 223supporting

confidence: 55%

“…P 339 stabilization by pyrolysis have been observed in a previous study on the pyrolysis of sewage 340 sludge (Qian and Jiang, 2014). P immobilized after HTC treatment was also observed for cow 341 manure, where the water-extractable P (WEP) and mehlich-3-extractable P (MEP) decreased 342 from ~50% and 65% in the raw feedstock to ~8% and 20% after HTC treatment, respectively 343 (Dai et al, 2015). To further elucidate the stabilization mechanism and the chemical nature of 344 acid/base partitioning of different P species, we conducted P XANES and LCF analysis on the 345 solid residues after each extraction step (Figure 4).…”

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confidence: 69%

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Evolution of phosphorus complexation and mineralogy during (hydro)thermal treatments of activated and anaerobically digested sludge: Insights from sequential extraction and P K-edge XANES

2016

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(Hydro)thermal treatments of sewage sludge is a promising option that can simultaneously target safe waste disposal, energy recovery, and nutrient recovery/recycling. The speciation of phosphorus (P) in sludge is of great relevance to P reclamation/recycling and soil application of sludge-derived products, thus it is critical to understand the effects of different treatment techniques and conditions on P speciation. This study systematically characterized P speciation (i.e. complexation and mineral forms) in chars derived from pyrolysis and hydrothermal carbonization (HTC) of municipal sewage sludges. Combined sequential extraction and P K-edge X-ray absorption near edge structure (XANES) spectroscopy analysis revealed the dependence of P transformation on treatment conditions and metal composition in the feedstocks. Pyrolysis of sludges decreased the relative abundance of phytic acid while increased the abundance of Al-associated P. HTC thoroughly homogenized and exposed P for interaction with various metals/minerals, with the final P speciation closely related to the composition/speciation of metals and their affinities to P. Results from this study revealed the mechanisms of P transformation during (hydro)thermal treatments of sewage sludges, and might be applicable to other biosolids. It also provided fundamental knowledge basis for the design and selection of waste management strategies for better P (re)cycling and reclamation.

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“…Similar decrease in organic P after pyrolysis was also observed for manures based on chemical 255 extraction (Dai et al, 2015). 256 257…”

Section: P Speciation Changes During Pyrolysis 223supporting

confidence: 55%

mentioning

confidence: 69%

Evolution of phosphorus complexation and mineralogy during (hydro)thermal treatments of activated and anaerobically digested sludge: Insights from sequential extraction and P K-edge XANES

2016

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“…The solubility of phosphates during hydrothermal 4 processing decreases in the presence of Ca increases due to precipitation of calcium 5 phosphate (Dai et al, 2015). 6 7…”

Section: 3mentioning

confidence: 99%

“…Figure 4 shows the distribution of organic -P and phosphate -19 P in each of the aqueous products. As the process temperature increases, the organic-P (a 20 complex fraction of phospholipids, DNA and phosphate monoesters) break down into 21 phosphate -P (Dai et al, 2015). Following thermal hydrolysis of swine manure, organic -P 22 accounts for about 12% of the total TP concentration while 88% was in the form of 23 phosphate.…”

Section: Total Organic Carbon (Toc) 29mentioning

confidence: 99%

A comparison of product yields and inorganic content in process streams following thermal hydrolysis and hydrothermal processing of microalgae, manure and digestate

Ekpo

Ross

Camargo‐Valero

et al. 2016

Bioresource Technology

209

118

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ReuseUnless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Thermal hydrolysis and hydrothermal processing have shown promise for converting biomass 10 into higher energy density fuels. Both approaches can facilitate the extraction of inorganics in 11 to the aqueous process waters. This study compares the behaviour of microalgae, digestate, 12 swine and chicken manure by thermal hydrolysis and hydrothermal processing at increasing 13 process severity. Thermal hydrolysis was performed at 170 °C, hydrothermal carbonization 14 (HTC) was performed at 250 °C, hydrothermal liquefaction (HTL) was performed at 350 °C 15 and supercritical water gasification (SCWG) was performed at 500 °C in a batch reactor. The 16 level of nitrogen, phosphorus and potassium in the product streams was measured for each 17 feedstock. Nitrogen is present in the aqueous phase as organic-N and NH3-N. The proportion 18 of organic N increases the lower the temperature. The extraction of phosphorus is strongly 19 linked to the presence of inorganics such as Ca, Mg and Fe in the starting feedstock. 20 A comparison of product yields and inorganic content in process streamsMicroalgae and chicken manure release phosphorus more easily than the other feedstocks. 21Keywords: hydrothermal processing, NPK, manure, microalgae, digestate 22 23 Introduction 24Hydrothermal processing of biomass can be utilised as either a pre-treatment or for energy 25 densification. Thermal hydrolysis is often used prior to anaerobic digestion at temperatures in 26 the range 160-170 o C resulting in enhanced biogas yields (Mendez et al., 2015). 27Hydrothermal carbonisation (HTC) is operated at 180-250 °C and pressure between 2-10 28MPa, and produces a carbon-rich bio-coal (Mumme et al., 2011). Hydrothermal liquefaction 29 (HTL) is operated at 280-370 °C and pressures ranging from 10-25 MPa and produces a 30 synthetic bio-crude (Biller et al., 2012). Supercritical water gasification (SCWG) is operated 1 at temperatures above 450 °C and pressure above the critical point of water (22 MPa) 2 producing a syngas containing H2, CO2 and CH4 (Toor et al., 2011). There is a growing 3 interest in the recovery of nutrients from wet wastes such as manures and bio-solids and 4 hydrothermal processing has been proposed to facilitate...

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“…Hydrothermal carbonization has been suggested as a process for managing P content in cow manure. Dai et al [191] used wet cow manure (85 % MC) for biochar production using autoclaves that operated at 200°C for 4, 6, 8, 10, 12, and 24 h. Results indicated that hydrothermal processing retains P (as observed from the relative increase of P in thermally treated manure). Moreover, the retained P presented lower levels of Water-extractable P (WEP) and…”

Section: Hydrothermal Carbonizationmentioning

confidence: 99%

Approaches for adding value to anaerobically digested dairy fiber

Peláez-Samaniego

Hummel

Liao

et al. 2017

Renewable and Sustainable Energy Reviews

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One of the consequences of the increase of large dairy concentrated feeding operations (CAFOs) is the abundance of dairy manure that needs to be disposed of or used in some way. CAFOs can become bio-refineries, harnessing the manure for heat, power, fuel, chemicals, fertilizers, fiber, wood composites, and biochar for production of multiple value-added co-products. The objective of this paper is to review options for using dairy manure fiber and its corresponding anaerobically digested (AD) fiber. Bedding for cows remains a common choice for employing the separated AD fiber. However, research has shown that AD fiber has potential for using it as a component of growth substrates used in container plant production systems, for producing composite materials, or as a feedstock for both chemical and thermochemical operations. Potential uses of AD fiber such as composite materials and liquid fuels are proposed based on experiences employing the manure and its fiber (both without a previous AD step and after AD). Thermochemical processing (e.g., liquefaction and pyrolysis) of AD fiber for fuels and chemicals has been conducted at laboratory level and still needs further study at larger scale. Gasification of AD fiber is a promising option since there is potential for integration of current methane production with methane produced from thermal gasification.

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Immobilization of phosphorus in cow manure during hydrothermal carbonization

Cited by 127 publications

References 36 publications

Evolution of phosphorus complexation and mineralogy during (hydro)thermal treatments of activated and anaerobically digested sludge: Insights from sequential extraction and P K-edge XANES

Evolution of phosphorus complexation and mineralogy during (hydro)thermal treatments of activated and anaerobically digested sludge: Insights from sequential extraction and P K-edge XANES

A comparison of product yields and inorganic content in process streams following thermal hydrolysis and hydrothermal processing of microalgae, manure and digestate

Approaches for adding value to anaerobically digested dairy fiber

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