Carbon source recovery from waste sludge reduces greenhouse gas emissions in a pilot-scale industrial wastewater treatment plant

Wang, Qiandi; Li, Xi-Qi; Liu, Wenzong; Zhai, Siyuan; Xu, Qiongying; Huan, Chang'an; Nie, Shichen; Ouyang, Qinghua; Wang, Hongcheng; Wang, Aijie

doi:10.1016/j.ese.2022.100235

Cited by 34 publications

(5 citation statements)

References 46 publications

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“…However, the resource utilization ratio of industrial sludge is very low, while the resource utilization ratio of RM is less than 10% [26]. Carbon emission reduction, as an important goal of global environmental protection, requires the resource utilization of various industrial sludges [27]. Converting the organic matter in the sludge into energy or resource products through technical means can not only reduce greenhouse gas emissions, but also realize the resource utilization of waste, which has significant environmental protection and economic benefits [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…Converting the organic matter in the sludge into energy or resource products through technical means can not only reduce greenhouse gas emissions, but also realize the resource utilization of waste, which has significant environmental protection and economic benefits [28,29]. Wang et al [27] recovered large amounts of carbon from sludge through acidogenic fermentation and performed denitrification, which helps to reduce greenhouse gas emissions. Huang et al [30] studied sludge-derived concrete and found that the sludge treatment method had the potential to achieve an 83.48% reduction in carbon emissions compared to conventional cement.…”

Section: Introductionmentioning

confidence: 99%

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A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Xiong,

Zhang,

Zhao

et al. 2024

Energies

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Sewage sludge and red mud, as common industrial waste, have become a research hotspot in the field of achieving carbon peaking and carbon neutrality, reducing carbon emissions, and solving environmental problems. However, their treatment and disposal have always been a difficult problem in the environmental field. Utilizing these two materials for thermal energy storage can not only improve energy utilization efficiency but also further reduce carbon emissions during their treatment process, providing a new approach for sustainable development in the industrial sector. This article summarizes the research progress for the resource recovery of sewage sludge and red mud for direct thermal energy recovery and composite phase change energy storage. After proper treatment, sludge and red mud can be directly used as energy storage materials. In addition, sludge and red mud can be combined with phase change materials to prepare composite materials with an excellent energy storage performance. This composite has broad application prospects in fields such as solar energy utilization and building energy efficiency. However, there are still some challenges and issues in this resource recovery and utilization, such as potential environmental pollution during the treatment process, the long-term stability of energy storage materials, and cost-effectiveness, which require further research and resolution. The purpose of this paper is to evaluate the potential of sewage sludge and red mud as energy storage materials, to explore their feasibility and advantages in practical applications, and to reveal the research progress, technical challenges, and future development directions of these two materials in the field of thermal energy storage.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Xiong,

Zhang,

Zhao

et al. 2024

Energies

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“…The advantages of introducing microbial electrolysis in AD include, but are not limited to, a faster fermentation process, better adaptability to adverse environmental conditions, and high-quality biogas [6,7]. WAS, as a waste biomass rich in organic matter, is difficult to convert into energy because most of the organic matter exists inside the cells and is difficult to release [8][9][10]. At present, various pretreatment (physical, chemical and biological) methods are used to accelerate sludge disruption and organic matter hydrolysis, but the rate of methane production is still limited, and some pretreatment methods may also inhibit the methanogenesis process [11,12].…”

Section: Introductionmentioning

confidence: 99%

Fermentation and Biogas Production of Alkaline Wasted Sludge Enhanced in a Bioelectrolysis-Assisted Anaerobic Digestion Reactor under Increasing Organic Loads

Liu

et al. 2023

Sustainability

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Challenges are always proposed when pursuing more energy and resource recovery from waste activated sludge via the anaerobic digestion (AD) process. Recently, microbial electrolysis has been integrated with AD and has been proven to enhance sludge conversion and system stability. This study investigated the effect of organic load on fermentation and biogas production in a bioelectrolysis-assisted AD reactor. Four different organic loads of alkaline waste sludge from 6 g/L to 14 g/L were investigated for their effects on the methanogenesis rate, substrate metabolism, electrochemical performance, and contribution. The results showed that the integrated system had a stronger tolerance to organic loads than the traditional anaerobic system. When the sludge concentration reached 14 g/L, the methanogenic rate, total methane yield, and SS removal rate significantly increased, reaching 47.1 mL/d, 96.2 mL/gVSS, and 71.6%, which were 1.27, 2.08, and 1.28 times those of the control, respectively. A high organic load was beneficial to the overall methanogenic rate but prolonged the fermentation period. Under a low organic load, the energy efficiency of the system deteriorated because the power loss increased and the electrochemical contribution rate was less than 50%. This result suggests that the integrated system can work and improve the overall energy yield from a high organic load of wasted sludge digestion.

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“…In a study on the evaluation of the wastewater treatment plant (WWTP) at PT AN in the East Java unit, the results of COD reduction efficiency using activated sludge were 87.91%, while by the same aeration process at PT AN unit in Bekasi is only around 39.54%. This is the background why this 1268 (2023) 012016 IOP Publishing doi:10.1088/1755-1315/1268/1/012016 2 research is needed, in addition, theoretically the efficiency of COD reduction under optimal conditions can reach more than 90% [4]. There are indications that the lack of COD reduction efficiency at PT AN is due to the low concentration of activated sludge as indicated by the low value of mixed liquor suspended solids (MLSS) and the high Sludge Volume Index (SVI) value.…”

Section: Introductionmentioning

confidence: 99%

Study on activated sludge composition and concentration setting for increasing COD efficiency in dairy industry wastewater

Wikaningrum,

Putri

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The dairy industry’s wastewater is the pollution problems that must be concerned. Since dairy wastewater tends to be easily biodegradable, the commonly wastewater treatment technology is biological treatment. The efficiency of reducing COD in the aeration tank of PT. AN was about 39.54% compared to the theoretical that can be achieved until 90%. Therefore, this research objective was to improve the efficiency of COD reduction in the aerobic-activated sludge process of PT. AN. The research was done by laboratory experimental method with variations of the concentration and type of the activated sludge applied, also variations in Bacillus cereus bacteria addition. The performance was measured by the COD reduction efficiency after 9-hour aeration and 3-hour sedimentation. The result showed that by increasing 100% of the activated sludge concentration, the process could increase the COD reduction from 20.3% to 49.8%. The 50:50 combination of existing activated sludge and other activate sludge taken from non-dairy industry’s WWTP got worse result, with the COD reduction from 20.3% to 15.9 %. The better result was shown by Bacillus cereus bacteria addition, the COD reduction can achieve 67.0% with 4.7 % bacteria addition and 97.0% COD reduction can be achieved with 9% bacteria addition.

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Carbon source recovery from waste sludge reduces greenhouse gas emissions in a pilot-scale industrial wastewater treatment plant

Cited by 34 publications

References 46 publications

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Fermentation and Biogas Production of Alkaline Wasted Sludge Enhanced in a Bioelectrolysis-Assisted Anaerobic Digestion Reactor under Increasing Organic Loads

Study on activated sludge composition and concentration setting for increasing COD efficiency in dairy industry wastewater

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