Developing a high-performance methane stage for biomass with high nitrogen loads

Geißler, Anne; Schwan, Benjamin; Dornack, Christina

doi:10.1016/j.renene.2019.05.043

Cited by 2 publications

(2 citation statements)

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“…The total Kjeldahl nitrogen (TKN) is defined as the sum of ammonia (NH 4 and NH 3 ) and organic nitrogen (Org-N) [55]. In wastewater, the presence of organic nitrogen is due to deamination reactions during the metabolism of organic matter [56].…”

Section: Total Kjeldahl Nitrogen (Tkn) Removalmentioning

confidence: 99%

Bio-char as an adsorbent for wastewater purification

Z. Ibaid

2024

Sustainable Use of Biochar - From Basics to Advances

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This study was conducted to investigate the feasibility of use of olivepomace residues and citrus tree wood residues after burning at 550°(olivepomace charcoal and citrus charcoal) as alternative non-traditional substrates in vertical flow wetland systems (VFCWs) for removing inorganic pollutants and organic pathogens from municipal wastewater through secondary treatment for carbon emission reduction to combat climate change. The effectiveness of this treatment was examined by two pilot scale vertical flow constructed wetlands (VFCWs) systems with alternative substrates. Each system was designed from two operated units in series (two stages of treatment), each unit was manufactured with the same design and size. The difference between each system was the substrates used for treatment. The first system included olivepomace charcoal, while the second system included olivepomace charcoal with citrus charcoal. Both models were operated at the same time and under the same conditions. Both systems were tested with seven different hydraulic retention time (HRT) (12-24-36-48-96-144-192 hours). After conducting laboratory tests on wastewater samples after treatment for several biological, physical, and chemical tests, the results indicated that citrus charcoal and olive charcoal are effective alternative substrates in constructed wetland systems. The systemic way test results showed the lowest removal efficiency for TSS, BOD, COD, TP, TKN, and Fecal Coliform (95, 53, 44, 52, 40, and 66% at 12 hr), while the highest removal rates (97, 94, 94, 80, 69, and 98% at 12 hr), respectively in Model 1. And minimum removal rates for TSS, BOD, COD, TP, TKN and Fecal Coliform (95, 34, 22, 42, 48, and 50% at 12 hr), respectively, while the optimal removal (97, 98, 98, 71, 71, and 99% at 12 hr), respectively, in Model 2. This study proved that olive solid waste and tree wood residues are effective alternative substrates in removing pollutants from wastewater, which are inexpensive and environmentally friendly.

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Section: Total Kjeldahl Nitrogen (Tkn) Removalmentioning

confidence: 99%

Bio-char as an adsorbent for wastewater purification

Z. Ibaid

2024

Sustainable Use of Biochar - From Basics to Advances

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“…Substrate characteristics play a major role in UASB process efficiency: a high nitrogen concentration and a significant particulate matter content in the influent wastewater can lead to an excessive ammonia accumulation, which is notoriously toxic (after a certain threshold), and to a slow hydrolysis phase, reducing biogas production rate [ 24 ]. Some of the most recently reported literature outcomes regarding UASB treatment of different high-loaded substrates were summarized in Table 1 .…”

Section: Uasb Reactor: Substrate Characteristics and Operating Conmentioning

confidence: 99%

Up-Flow Anaerobic Sludge Blanket (UASB) Technology for Energy Recovery: A Review on State-of-the-Art and Recent Technological Advances

2020

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Up-flow anaerobic sludge blanket (UASB) reactor belongs to high-rate systems, able to perform anaerobic reaction at reduced hydraulic retention time, if compared to traditional digesters. In this review, the most recent advances in UASB reactor applications are critically summarized and discussed, with outline on the most critical aspects for further possible future developments. Beside traditional anaerobic treatment of soluble and biodegradable substrates, research is actually focusing on the treatment of refractory and slowly degradable matrices, thanks to an improved understanding of microbial community composition and reactor hydrodynamics, together with utilization of powerful modeling tools. Innovative approaches include the use of UASB reactor for nitrogen removal, as well as for hydrogen and volatile fatty acid production. Co-digestion of complementary substrates available in the same territory is being extensively studied to increase biogas yield and provide smooth continuous operations in a circular economy perspective. Particular importance is being given to decentralized treatment, able to provide electricity and heat to local users with possible integration with other renewable energies. Proper pre-treatment application increases biogas yield, while a successive post-treatment is needed to meet required effluent standards, also from a toxicological perspective. An increased full-scale application of UASB technology is desirable to achieve circular economy and sustainability scopes, with efficient biogas exploitation, fulfilling renewable energy targets and green-house gases emission reduction, in particular in tropical countries, where limited reactor heating is required.

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Developing a high-performance methane stage for biomass with high nitrogen loads

Cited by 2 publications

References 0 publications

Bio-char as an adsorbent for wastewater purification

Bio-char as an adsorbent for wastewater purification

Up-Flow Anaerobic Sludge Blanket (UASB) Technology for Energy Recovery: A Review on State-of-the-Art and Recent Technological Advances

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