Pre-treatment Technologies to Enhance Anaerobic Digestion

Pilli, Sridhar; Pandey, Ashutosh Kumar; Katiyar, Ankur; Pandey, Kritika; Tyagi, Rajeshwar Dayal

doi:10.5772/intechopen.93236

Cited by 13 publications

(13 citation statements)

References 129 publications

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“…This improves the solubilization of organic waste, and the increased bacterial activity results in the release of hydrolytic enzymes. This significantly increased biogas production by doubling or tripling it ( Pilli et al., 2020 ; Owusu-Agyeman et al., 2021 ).…”

Section: Resultsmentioning

confidence: 99%

Bio methane potential of sludge from municipal sewer and exchange stations

Selamawit

Agizew

2022

Heliyon

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Technologies with resource recovery alternatives are suggested in metropolitan settings. Anaerobic digesters (AD) are the most common. The use of microcrystalline cellulose and a variety of grocery products as control feed increases the cost of bio methane potential analysis (BMP). This limits its replication, especially in developing countries. As a result, this study looks into the use of milled paper as a control feed during BMP analysis of sludge from sewer and exchange stations. A batch experimental study at 37 °C with hydraulic retention times of 23 and 24 days for exchange station and sewage sludge, respectively, was established for the assessment. The pH of the sewage sludge was acidic during the analysis. To avoid underestimating the total (TS) and volatile solid (VS) ratios, the VS should indeed be determined through temperature or pH adjustment. As a result, the preceding alternative was implemented in this work. According to the findings of the online biogas application, the blank (milled paper) accurately keeps the required validation standards. Furthermore, the gas production potential of sludge from the exchange station (ES) and the sewage line (SS) is 2.4 and 1.6 NL/gVs, respectively. The generated gas has an electric potential of 8.81 and 3.35 KWH for ESS and SS, respectively. Interestingly, the calorific values of the investigated substrates were also nearly equivalent. In brief, using milled paper as a control feed in BMP analysis reduces laboratory costs and encourages BMP test repetition, which is especially important in developing countries. This advances research on the use of AD in the search for alternative energy sources.

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Section: Resultsmentioning

confidence: 99%

Bio methane potential of sludge from municipal sewer and exchange stations

Selamawit

Agizew

2022

Heliyon

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“…Pretreatment methods enhance the biodegradation of complex organic matter in AD systems, resulting in an increase in biogas quality and production and improved biosolids quality in reduced production [60,61]. Various pre-treatment technologies mainly mechanical, thermal, chemical, biological, and their integration can be chosen to enhance the digestion process [60,62]. Pretreatment prior to AD of waste jeans (60% cotton, 40% polyester) and pure cotton waste substrates using 0.5 M Na 2 CO 3 at 150 • C for 120 min generates a maximum methane yield of 328.9 and 361.1 mL CH 4 /g VS, respectively [63].…”

Section: Anaerobic Digestion Of Textile Wastementioning

confidence: 99%

A Review on Textile Recycling Practices and Challenges

2022

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The expansion of clothing and textile industry and the fast fashion trend among consumers have caused a rapid global increase in textile waste in the municipal solid waste (MSW) stream. Worldwide, 75% of textile waste is landfilled, while 25% is recycled or reused. Landfilling of textile waste is a prevalent option that is deemed unsustainable. Promoting an enhanced diversion of textile waste from landfills demands optimized reuse and recycling technologies. Reuse is the more preferred option compared with recycling. Various textile reuse and recycling technologies are available and progressively innovated to favor blended fabrics. This paper aims to establish reuse and recycling technologies (anaerobic digestion, fermentation, composting, fiber regeneration, and thermal recovery) to manage textile waste. Improved collection systems, automation of sorting, and discovering new technologies for textile recycling remains a challenge. Applying extended producer responsibility (EPR) policy and a circular economy system implies a holistic consensus among major stakeholders.

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“…The approximate cost linked with the pretreatment process were70-150 US dollars per ton sludge of capital, operational, and maintenance costs (Pilli et al, 2020). In alkali pretreatment, the pH alteration is obligatory to restrict the methanogenic microorganism inhibition, and thus the additional cost is predictable.…”

Section: Capital Costmentioning

confidence: 99%

Indexing energy and cost of the pretreatment for economically efficient bioenergy generation

Preethi

Gunasekaran

2023

Front. Energy Res.

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The growing necessity for energy worldwide has led to the hunt for an interminable solution in the form of sustainable energy generation. To accomplish sustainability, these problems can be resolved using renewable waste biomass, which is readily accessible and low priced. Moreover, the ecological issue due to the disposal of this waste biomass into the environment is also counteracted by the use of this biomass for energy generation along with the substantial solid reduction for disposal. The presence of complex biopolymers in biomass, which hasten the hydrolysis step during energy generation, was enhanced by the application of a pretreatment method. The efficiency of the pretreatment methods was enhanced by maintaining the cost and energy usage since the commercialization of this method is largely limited. The major economic drivers are based on solid concentration and, thus, lead to higher capital costs. This study reveals the wide assortment of current progression in pretreatment techniques for treating waste biomass with special focus on combined and phase-separated pretreatment. Additionally, it converses the advantages and limitations of pretreatment methods. This pivotal investigation brings about the cost- and energy-effective conversion solution that paves the way for a sustainable energy system.

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Pre-treatment Technologies to Enhance Anaerobic Digestion

Cited by 13 publications

References 129 publications

Bio methane potential of sludge from municipal sewer and exchange stations

Bio methane potential of sludge from municipal sewer and exchange stations

A Review on Textile Recycling Practices and Challenges

Indexing energy and cost of the pretreatment for economically efficient bioenergy generation

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