Digestate mechanical separation: Efficiency profiles based on anaerobic digestion feedstock and equipment choice

Guilayn, Felipe; Jimenez, Julie; Rouez, Maxime; Crest, Marion; Patureau, Dominique

doi:10.1016/j.biortech.2018.11.090

Cited by 94 publications

(62 citation statements)

References 31 publications

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“…Increasingly, there is interest in concentrating nutrients from digested animal manure in more transportable and marketable forms to facilitate movement of P from areas where soils have sufficient or excess P to other P-limited fields or the marketplace [11,17]. Primary solid-liquid separation via screw press is commonly used to separate the coarse solids from digestate, creating solid and liquid fractions with distinct characteristics [12,18,19]. The coarse solids have value as animal bedding, commercial potting mixes (e.g., Magic Dirt™), and mushroom cultivation substrates [20,21], and can be recycled on-farm, or sold off-farm to reduce P surpluses on dairy farms and ameliorate the cost of nutrient recovery.…”

Section: Introductionmentioning

confidence: 99%

Upcycling Phosphorus Recovered from Anaerobically Digested Dairy Manure to Support Production of Vegetables and Flowers

Porterfield

Joblin²,

Neher

et al. 2020

Sustainability

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Dissolved air flotation (DAF) separates phosphorus (P)-rich fine solids from anaerobically digested dairy manure, creating opportunities to export surplus P to the marketplace as a bagged plant food product. Seedlings of tomato and marigold were amended at various volume per volume (v/v) ratios with plant foods consisting of fine solids upcycled (i.e., transformed into a higher quality product) by drying and blending with other organic residuals. A plate competition assay was conducted to assess the fine solids’ potential to suppress the plant pathogen Rhizoctonia solani. Plant foods were comprised of 2.0–2.1% N, 0.8–0.9% P and 0.6–0.8% K. Extractions indicated that plant foods contained a mixture of plant-available and slow-release P. At 6% v/v plant food, dry biomass of marigold and tomato were six-times greater than the unamended control and not significantly different from a market alternative treatment. Fine solids exhibited negligible potential to suppress R. solani. This study indicates that DAF-separated fine solids could be used to support horticulture, providing information for design of a circular economy approach to dairy manure nutrient management. Life cycle assessment and business model development for this nutrient recovery strategy are necessary next steps to further guide sustainability efforts.

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Section: Introductionmentioning

confidence: 99%

Upcycling Phosphorus Recovered from Anaerobically Digested Dairy Manure to Support Production of Vegetables and Flowers

Porterfield

Joblin²,

Neher

et al. 2020

Sustainability

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“…The digested substrate can be dewatered by solar drying or solid-liquid separators to produce high-quality organic fertilizer. Liquid removal from the digestate also provides reduction in transportation costs [39]. In Burdur province annually about 50776 tons of organic fertilizer can be produced from biogas plants to increase the efficiency of the agricultural lands.…”

Section: Resultsmentioning

confidence: 99%

Energy Recovery From Animal Manure: Biogas Potential of Burdur, Turkey

Akyürek¹

2019

Anadolu University Journal of Science and Technology-a Applied Sciences and Engineering

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Sustainable development depends on the availability of energy resources and their impact on environment. Biogas is a carbon neutral renewable energy option and one of the leading solutions to the climate change combat. As Turkey is an energy importer country, using indigenous energy sources is vital to meet future energy demand. Agricultural activities and livestock potential have high contribution to economy in Turkey. Biogas production from organic wastes such as livestock manure in this context, gain more importance to contribute both renewable energy production and waste management strategies. Livestock farming has important economic value in Burdur. In this regard, the animal manure based biogas potential, energy value, electricity and organic fertilizer generation capacity of Burdur Province were determined in this study. The results revealed that Burdur has annually 1.45 million tons of available animal manure potential to be used for biogas production of 27.1 million m 3 /year. This potential corresponds to 135.4 GWh annual energy generation that could be converted to heat and electricity. Considerable amount of the biogas production capacity has accumulated in the Center and, Bucak, Yeşilova, Gölhisar and Karamanlı districts of Burdur. In addition, about 50776 tons/year of organic fertilizer can be produced as the residual of the biogas plants.

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“…Regardless of the good performance of AD on carbon utilization for methane production and chemical oxygen demand reduction, the digestion effluent still contains relatively high amounts of solids (particulate organics and colloids) and dissolved organics (some nonbiodegradable compounds). Physical and chemical separation methods, such as coagulation, flocculation, sedimentation, activated carbon adsorption, filtration, and reverse osmosis, have been developed and implemented to treat anaerobic digestion effluents and achieve a water quality near to drinking water standards [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Dissolved metal ions undergo complexation reactions with hydroxyl ions to form metal hydroxides (Fe(OH) 2 , Fe(OH) 3 , Mg(OH) 2 , Al(OH) 3 ). The metal hydroxides with low solubility facilitate relieving repulsive forces between the colloids, destabilizing suspended solid particles, and forming flocs [17,18].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Electrocoagulation on Water Reclamation and Bacterial/Viral Indicator Reductions of a High-Strength Organic Wastewater—Anaerobic Digestion Effluent

et al. 2020

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This study investigated the use of iron and aluminum and their combinations as electrodes to determine the technically sound and economically feasible electrochemical approach for the treatment of anaerobic digestion effluent. The results indicated that the use of iron as anode and cathode is the most suitable solution among different electrode combinations. The reduction of turbidity, total chemical oxygen demand, total phosphorus, total coliforms, Escherichia coli, Enterococci, and phages in the reclaimed water were 99%, 91%, 100%, 1.5 log, 1.7 log, 1.0 log, and 2.0 log, respectively. The economic assessment further concluded that the average treatment cost is $3 per 1000 L for a small-scale operation handling 3000 L wastewater/day. This study demonstrated that the electrocoagulation (EC) is a promising technique for the recovery and reclamation of water from anaerobic digestion effluent. Even though its energy consumption is higher and the nitrogen removal is insufficient compared to some conventional wastewater treatment technologies, there are several advantages of the EC treatment, such as short retention time, small footprint, no mixing, and gradual addition of coagulants. These features make EC technology applicable to be used alone or combined with other technologies for a wide range of wastewater treatment applications.

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Digestate mechanical separation: Efficiency profiles based on anaerobic digestion feedstock and equipment choice

Cited by 94 publications

References 31 publications

Upcycling Phosphorus Recovered from Anaerobically Digested Dairy Manure to Support Production of Vegetables and Flowers

Upcycling Phosphorus Recovered from Anaerobically Digested Dairy Manure to Support Production of Vegetables and Flowers

Energy Recovery From Animal Manure: Biogas Potential of Burdur, Turkey

Techno-Economic Analysis of Electrocoagulation on Water Reclamation and Bacterial/Viral Indicator Reductions of a High-Strength Organic Wastewater—Anaerobic Digestion Effluent

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