Sludge disintegration and anaerobic digestion enhancement by alkaline-thermal pretreatment: Economic evaluation and microbial population analysis

Park, Jungsu; Cayetano, Roent Dune A.; Kim, Jun Seok; Jo, Yura; Kwon, Yeelyung; Lei, Zhongfang

doi:10.1016/j.biortech.2021.126594

Cited by 34 publications

(6 citation statements)

References 44 publications

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“…Moreover, it proved that the pretreatment method significantly impacted the distribution of NPOC in individual EPS fractions (Tables S12-S16, Figure 3). This observation is consistent with the literature reports [55]. For all the tested methods for the first two fractions (EPS-S, EPS-LB), a significant increase in the NPOC concentration was noted compared to the control sample (Tables S13 and S14).…”

Section: Selection Of Pretreatment Conditionssupporting

confidence: 92%

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Jasińska,

Grosser,

Meers

et al. 2024

Energies

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The European Union’s energy policy favors increasing the share of renewable energy in total energy production. In this context, the co-digestion of various waste streams seems an interesting option. This study aimed to determine the effect of selected pretreatment methods on the efficiency and kinetics of the co-digestion process of poultry manure with sewage sludge and organic waste. This research was carried out in four stages: (1) the selection of the third component of the co-digestion mixture; (2) the determination of the most favorable inoculum-to-substrate ratio for the co-digestion mixture; (3) the selection of the most favorable pretreatment parameters based on changes in volatile fatty acids, ammonium nitrogen, extracellular polymers substances (EPS) and non-purgeable organic carbon (NPOC); and (4) the evaluation of anaerobic co-digestion based on the result of the BMP tests and kinetic studies. All the pretreatment methods increased the degree of organic matter liquefaction as measured by the NPOC changes. Waste with a high fat content showed the highest methane potential. The addition of grease trap sludge to feedstock increased methane yield from 320 mL/g VSadd to 340 mL/g VSadd. An optimal inoculum-to-substrate ratio was 2. The pretreatment methods, especially the thermochemical one with NaOH, increased the liquefaction of organic matter and the methane yield, which increased from 340 mL/g VSadd to 501 mL/g VSadd (trial with 4.5 g/L NaoH).

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Section: Selection Of Pretreatment Conditionssupporting

confidence: 92%

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Jasińska,

Grosser,

Meers

et al. 2024

Energies

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“…The recovered protein, as a renewable source, could be used as yeast extract and peptone substitute to culture microorganism like P. aeruginosa, which achieved nitrogen source recycling. In addition, AT pretreatment was reported to enhance the sludge biodegradability 37 . The following EFS showed more advantages for COD removal e ciency compared with AD.…”

Section: Sequential Resource Recovery and Disposal Of Waste Sludgementioning

confidence: 99%

Sequential recovery of protein and ammonium from waste sludge and functional metabolism in a combined process of nutrient recovery electro-fermentation (NREF)

Gu,

Zhou,

Wang

et al. 2024

Resources, Conservation and Recycling

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“…Another way to increase economic efficiency is to use technologies and process units that increase the biodegradability of the substrates used, which has a positive effect on the quantity and qualitative composition of the biogas produced [22]. The search for this type of improvement primarily relates to the development, testing and final implementation of different pretreatment methods [23]. To date, many techniques have been analysed to improve the susceptibility of organic substrates to degradation under anaerobic conditions.…”

Section: Introductionmentioning

confidence: 99%

The Use of Hydrodynamic Cavitation to Improve the Anaerobic Digestion of Waste from Dairy Cattle Farming—From Laboratory Tests to Large-Scale Agricultural Biogas Plants

Dębowski,

Kazimierowicz,

Nowicka

et al. 2024

Energies

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There is a need to find methods to intensify the anaerobic digestion process. One possibility is the use of pretreatment techniques. Many laboratory tests confirm their effectiveness, but in most cases, there is no verification work carried out on industrial plants. A reliable and complete evaluation of new solutions can only be carried out in plants that reflect operating conditions at a higher readiness technological level. This has a direct impact on the scientific value and, above all, on the high application value of innovative technologies. The aim of our research carried out under laboratory conditions and on a large scale was to determine the technological and energy efficiency of the use of hydrodynamic cavitation in the pretreatment of a waste mixture from dairy farms. It has been shown that hydrodynamic cavitation significantly increases the concentration of organic compounds in the dissolved phase. In the most effective variants, the increase in the content of these indicators was over 90% for both COD and TOC. The degree of solubilisation achieved was 49 ± 2.6% for COD and almost 52 ± 4.4% for TOC. Under laboratory conditions, the highest effects of anaerobic digestion were achieved after 10 min of pretreatment. The amount of biogas was, on average, 367 ± 18 mL/gCOD, and the amount of methane was 233 ± 13 mL/gCOD. Further large-scale optimisation trials showed that after 8 min of hydrodynamic cavitation, the biogas yield was 327 ± 8 L/kgCOD with a CH4 content of 62.9 ± 1.9%. With this variant, the net energy yield was 66.4 ± 2.6 kWh/day, a value that was 13.9% higher than the original variant with 10 min of disintegration and 3.1% higher than the variant without pretreatment.

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Sludge disintegration and anaerobic digestion enhancement by alkaline-thermal pretreatment: Economic evaluation and microbial population analysis

Cited by 34 publications

References 44 publications

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Stimulating Methane Production from Poultry Manure Digest with Sewage Sludge and Organic Waste by Thermal Pretreatment and Adding Iron or Sodium Hydroxide

Sequential recovery of protein and ammonium from waste sludge and functional metabolism in a combined process of nutrient recovery electro-fermentation (NREF)

The Use of Hydrodynamic Cavitation to Improve the Anaerobic Digestion of Waste from Dairy Cattle Farming—From Laboratory Tests to Large-Scale Agricultural Biogas Plants

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