Optimization and system energy balance analysis of anaerobic co-digestion process of pretreated textile dyeing sludge and food waste

Zhou, Weizhu; Tuersun, Nuremanguli; Zhang, Yizhen; Wang, Yu; Chen, Cheng; Chen, Xiaoguang

doi:10.1016/j.jece.2021.106855

Cited by 14 publications

(4 citation statements)

References 42 publications

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“…Heat application (i.e., autoclave and thermal) is the most reported treatment among physical pretreatments, alone and in combination (Figure 2). High temperatures are successful in lysing cells and increasing the solubilization of organic materials such as polysaccharides and protein, increasing soluble chemical oxygen demand in the liquid and solid fraction of the textile waste [42,43] and favoring biogas generation.…”

Section: Resultsmentioning

confidence: 99%

Comprehensive Meta-Analysis of Pathways to Increase Biogas Production in the Textile Industry

et al. 2022

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The textile industry is one of the largest environmental polluters in the world. Although waste management via anaerobic digestion (AD) is a sustainable strategy to transform waste into clean energy and water recovery, the efficiency of the AD process is reduced by the presence of recalcitrant materials, chemicals, and toxic contents. This study aims to investigate the performance of several chemical, physical, and biological pretreatments applied to improve the biodegradability of textile waste. We performed a meta-analysis with 117 data extracted from 13 published articles that evaluated the efficiency of pretreatments applied to textile waste prior to AD to increase biogas production measured as methane (CH4) yield. Even though the majority of the studies have focused on the effect of chemical and physical pretreatments, our results showed that the application of biological pretreatments are more efficient and eco-friendlier. Biological pretreatments can increase CH4 yield by up to 360% with lower environmental risk and lower operating costs, while producing clean energy and a cleaner waste stream. Biological pretreatments also avoid the addition of chemicals and favor the reuse of textile wastewater, decreasing the current demand for clean water and increasing resource circularity in the textile industry.

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Section: Resultsmentioning

confidence: 99%

Comprehensive Meta-Analysis of Pathways to Increase Biogas Production in the Textile Industry

et al. 2022

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“…The former could be regarded as necessary energy consumption; thus, it was not included in the benefits analysis for simplification. In addition, due to the short pre-treatment time, the thermal insulation energy consumption could be ignored ( Zhou et al, 2021 ). Figure 1 illustrates the operation of a biogas plant with a heat pre-treatment process.…”

Section: Methodsmentioning

confidence: 99%

The effect of heat pre-treatment on the anaerobic digestion of high-solid pig manure under high organic loading level

Wang²,

Peng³

et al. 2022

Front. Bioeng. Biotechnol.

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Since more and more large-scale farms appear in China and changes in fecal sewage source disposal, the production of high-concentration solid manure waste is also increasing, and its conversion and utilization are gaining attention. This study investigated the effect of heat pre-treatment (HPT) on the thermophilic anaerobic digestion (AD) of high-solid manure (HSM). Pig manure (PM) feed with a total solids of 13% was used for the HPT and subsequent anaerobic digestion (AD) test. The HPT was carried out at 60°C, 80°C, and 100°C, respectively, for 15 min after the heating reached the set temperature. The results show that HPT led to PM feed COD solubilization, observing a maximum increase of 24.57% after pretreated at 100°C, and the treated PM feed under this condition received the maximum methane production potential of 264.64 mL·g−1 VS in batch AD test, which was 28.76% higher than that of the untreated group. Another semi-continuous AD test explored the maximum volume biogas production rate (VBPR). It involves two organic loading rates (OLR) of 13.4 and 17.8 g VSadded·L−1·d−1. The continuous test exhibited that all the HPT groups could produce biogas normally when the OLR increased to the high level, while the digester fed with untreated PM showed failure. The maximum VBPR of 4.71 L L−1·d−1 was observed from PM feed after pre-treated at 100°C and running at the high OLR. This reveals that thermal treatment can weaken the impact of a larger volume of feed on the AD system. Energy balance analysis demonstrates that it is necessary to use a heat exchanger to reuse energy in the HPT process to reduce the amount of energy input. In this case, the energy input to energy output (Ei/Eo) ranged from 0.34 to 0.55, which was much less than one, suggesting that biogas increment due to heat treatment can reasonably cover the energy consumption of the pre-treatment itself. Thus combining HPT and high-load anaerobic digestion of PM was suitable.

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“…However, pretreated sludge did not perform as well in biomethane potential tests as expected it was [67,68]. In recent work, anaerobic co-digestion (coAD) using food waste as a cosubstrate was evaluated with thermally pretreated digestate [69]. The biomethane yield increased by 20 to 40%.…”

Section: Sludge Valorizationmentioning

confidence: 96%

A Short Review on Dye Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

Almeida,

Guimarães

2023

Preprint

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Dye-containing effluent generated in textile industries is polluting and complex wastewater. It should be managed adequately before the final destination. The up-flow anaerobic blanket (UASB) reactor application is an eco-friendly and cost-competitive treatment. The present study briefly reviews the UASB application for dye wastewater valorization. Bioenergy and clean water production potential during dye-containing wastewater treatment are emphasized to promote resource recovery in textile industries. Efficiencies of color and chemical oxygen demand of 50–97% and 60–90% are reported in bench-scale UASB studies. A biogas yield of 0.36–36.04 L d-1 in UASB, which treats dye-containing effluents, is documented. Bioenergy production and water reuse allow environmental and economic benefits. However, data on full-scale UASB treating dye wastewater are missing. Besides, studies on combined systems integrating membrane processes, such as ultrafiltration and nanofiltration, and pretreatment of wastewater and sludge for improvements in biogas production might realize the complete potential for resource recovery of UASB technology.

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Optimization and system energy balance analysis of anaerobic co-digestion process of pretreated textile dyeing sludge and food waste

Cited by 14 publications

References 42 publications

Comprehensive Meta-Analysis of Pathways to Increase Biogas Production in the Textile Industry

Comprehensive Meta-Analysis of Pathways to Increase Biogas Production in the Textile Industry

The effect of heat pre-treatment on the anaerobic digestion of high-solid pig manure under high organic loading level

A Short Review on Dye Wastewater Valorization Using Up-Flow Anaerobic Sludge Blanket Reactors

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