Optimizing pre-treatment conditions for anaerobic co-digestion of food waste and sewage sludge

Lee, Wonbae; Park, Seyong; Cui, Fenghao; Kim, Moonil

doi:10.1016/j.jenvman.2019.109397

Cited by 18 publications

(5 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a variety of pretreatment thermalchemical conditions has not been explored subsequently. A combination of thermal and chemical pretreatment methods can improve FW degradation, as reported by (Lee et al, 2019).…”

Section: Combined Pretreatmentmentioning

confidence: 87%

“…As a result, the water holding capacity and the nutrient content in the soil may be affected. However, ammonium ions (NH 4 + ) concentration increases because of the rise in organic nitrogen-containing degradation following thermal-chemical pretreatment (Lee et al, 2019). It is an industry-scale pretreatment that was implemented successfully.…”

Section: Combined Pretreatmentmentioning

confidence: 99%

See 1 more Smart Citation

Bio-Compost Behaviour as Soil Additive by Food Waste Pretreatment on the Growth of Abelmoschus esculentus L.: A Systematic Review

Muruga¹,

Arumugam²,

Ismail³

2021

JTAS

View full text Add to dashboard Cite

Food waste (FW) has always been a significant issue faced by almost all countries worldwide. The rise in FW does not only influence one’s food supply, yet the greenhouse gas (GHG) emission such as methane (CH4) and carbon dioxide (CO2) gas leads to global warming and health issues. This paper reviews the primary FW treatments available in all countries. Most advanced countries have accomplished that the least cost and most efficient FW treatment is composting. Among all the composting methods available, vermicomposting (VC) that uses redworms (Eisenia fetida) produces nutrients rich bio-compost, as proven in the existing literature. Furthermore, bio-compost produced by the VC method nourishes plant growth. In this study, the primary research data sources are 78 scientific articles over the last few years. This research is the consensus on VC as the FW treatment. Besides, briefly discuss the FW pretreatment methods, the effect of bio-compost on soil properties, and their corresponding effects on the growth of Abelmoschus esculentus L.

show abstract

Section: Combined Pretreatmentmentioning

confidence: 87%

Section: Combined Pretreatmentmentioning

confidence: 99%

Bio-Compost Behaviour as Soil Additive by Food Waste Pretreatment on the Growth of Abelmoschus esculentus L.: A Systematic Review

Muruga¹,

Arumugam²,

Ismail³

2021

JTAS

View full text Add to dashboard Cite

show abstract

“…Ultrasound exposure was performed using an ultrasonic bath, in which two power settings were considered (240 W vs. 600 W), and was performed prior to alkali treatment if applicable. The alkali treatment was performed using a 2 M solution (NaOH or Ca(OH) 2 ) added to each flask, and alkali digestion was performed using an oscillating shaker at 48 • C. The choices of NaOH addition, digestion time, ultrasound power, and exposure time were carefully considered based on both theoretical rationale and empirical evidence from previous research [24,29,30]. Determining the optimal range of these parameters helps achieve efficient extraction of crude sugars.…”

Section: Experimental Procedures 221 Extraction Of Sugarsmentioning

confidence: 99%

Optimizing the Extraction of Sugars from Sewage Sludge Using Ultrasound Combined with Thermal–Alkali

Fan,

Li,

Fonseca

et al. 2024

Water

View full text Add to dashboard Cite

The extraction and utilization of sugars from readily available and cost-effective sewage sludge increases the economic potential of this residue, contributing to sustainable urban development. The work presented here presents a novel method in which sugars can be directly extracted from sewage sludge following an ultrasound + thermal–alkali pretreatment. The best results indicated that by subjecting the sludge to a 240 W ultrasound for 20 min, followed by alkali digestion using 6 mL of a 2 M NaOH solution at 48 °C for 60 min, it was possible to maximize the yield of crude sugar (34.22 wt.% dry) with the purity of crude sugar at 46.80%, reaching an extraction efficiency of 99.84%. Response surface methodology was used to optimize the crude sugar yields based on experimental data, reaching a value of 34.67 wt.% dry when employing an ultrasound exposure time of 12.5 min and 6 mL of the NaOH solution for a digestion time of 57.5 min; these results were considered consistent with the experimental data.

show abstract

“…However, the efficiency is hampered by the poor biodegradability of the substrates (Zhang et al 2021c ). Adequate pretreatment techniques for substrate such as thermal hydrolysis, ultrasonic wave, ozone, and pH adjustment have been used to improve the waste’s biodegradation and hydrolysis to enhance biogas production (Ariunbaatar et al 2014 ; Lee et al 2019 ; Villamil et al 2020 ). Several studies have also investigated ARG fate after these pretreatment methods which can be classified into five groups: thermal hydrolysis, ultrasonication, ozonation, alkaline, and hybrid pretreatment.…”

Section: Factors Affecting the Fate Of Args In Ad Processesmentioning

confidence: 99%

An overview of the occurrence, impact of process parameters, and the fate of antibiotic resistance genes during anaerobic digestion processes

Pourrostami Niavol,

Bordoloi,

Suri

2024

Environ Sci Pollut Res

View full text Add to dashboard Cite

Antibiotic resistance genes (ARGs) have emerged as a significant global health threat, contributing to fatalities worldwide. Wastewater treatment plants (WWTPs) and livestock farms serve as primary reservoirs for these genes due to the limited efficacy of existing treatment methods and microbial adaptation to environmental stressors. Anaerobic digestion (AD) stands as a prevalent biological treatment for managing sewage sludge and manure in these settings. Given the agricultural utility of AD digestate as biofertilizers, understanding ARGs’ fate within AD processes is essential to devise effective mitigation strategies. However, understanding the impact of various factors on ARGs occurrence, dissemination, and fate remains limited. This review article explores various AD treatment parameters and correlates to various resistance mechanisms and hotspots of ARGs in the environment. It further evaluates the dissemination and occurrence of ARGs in AD feedstocks and provides a comprehensive understanding of the fate of ARGs in AD systems. This review explores the influence of key AD parameters such as feedstock properties, pretreatments, additives, and operational strategies on ARGs. Results show that properties such as high solid content and optimum co-digestion ratios can enhance ARG removal, while the presence of heavy metals, microplastics, and antibiotics could elevate ARG abundance. Also, operational enhancements, such as employing two-stage digestion, have shown promise in improving ARG removal. However, certain pretreatment methods, like thermal hydrolysis, may exhibit a rebounding effect on ARG levels. Overall, this review systematically addresses current challenges and offers future perspectives associated with the fate of ARGs in AD systems. Graphical Abstract

show abstract

Optimizing pre-treatment conditions for anaerobic co-digestion of food waste and sewage sludge

Cited by 18 publications

References 33 publications

Bio-Compost Behaviour as Soil Additive by Food Waste Pretreatment on the Growth of Abelmoschus esculentus L.: A Systematic Review

Bio-Compost Behaviour as Soil Additive by Food Waste Pretreatment on the Growth of Abelmoschus esculentus L.: A Systematic Review

Optimizing the Extraction of Sugars from Sewage Sludge Using Ultrasound Combined with Thermal–Alkali

An overview of the occurrence, impact of process parameters, and the fate of antibiotic resistance genes during anaerobic digestion processes

Contact Info

Product

Resources

About