Anaerobic digestion of dairy wastewater: effect of different parameters and co-digestion options—a review

Bella, K; Rao, P. Venkateswara

doi:10.1007/s13399-020-01247-2

Cited by 54 publications

(46 citation statements)

References 162 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Table 1 presents the average characterised effluent obtained over an HRT of 21 days. It is observed that the AD-AN system, preceding the AOP system as a post-treatment process, improved the wastewater treatability efficiency, as the degree of methanogenic activities are being subjected to digested organics (COD) for biogas production [9,20,31]. In this case, the high COD reduction, as observed (Table 1) in the AD-AN process, increased the biogas production to 240, 820 and 1220 mL/gCOD•d, respectively, for the HRTs of 7, 14 and 21 days.…”

Section: The Integrated System Decontamination Efficiencymentioning

confidence: 99%

“…Moreover, variations in the AD process feedstock and environmental conditions can result in high complex sludge that is difficult to treat economically and environmentally [9,12,19]. On this basis, our previous work [17,20,21] and other researched studies [9,12,18,19,[22][23][24] show that using a photocatalyst (Fe-TiO 2 ) with magnetic properties has tremendous potential in wastewater settings. With this, and the need to meet future water demands, creating a cost-effective, user-friendly and reliable technology with a significant impact on energy production and recuperation in water settings is urgently needed [3,5,15,16].…”

Section: Introductionmentioning

confidence: 96%

“…However, different microbes undergo distinct phases (hydrolysis, fermentation and methanogenesis) in the AD process [9,18]. Moreover, variations in the AD process feedstock and environmental conditions can result in high complex sludge that is difficult to treat economically and environmentally [9,12,19]. On this basis, our previous work [17,20,21] and other researched studies [9,12,18,19,[22][23][24] show that using a photocatalyst (Fe-TiO 2 ) with magnetic properties has tremendous potential in wastewater settings.…”

Section: Introductionmentioning

confidence: 97%

“…Considering the water-energy nexus via the cradle-to-reuse treatment of wastewater as renewable energy resources for biogas production has been reported as a viable alternative to fossil fuels [1,3,9]. Biogas production has significantly increased in recent years, contributing to renewable energy generation and lowering negative environmental impacts such as carbon footprints and soil and water contamination [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, the integrated AD-AOP is recognised as an attractive solution for treating effluents with a high organic content, consequently increasing bioenergy production in the form of methane [10,12,13,17]. However, different microbes undergo distinct phases (hydrolysis, fermentation and methanogenesis) in the AD process [9,18]. Moreover, variations in the AD process feedstock and environmental conditions can result in high complex sludge that is difficult to treat economically and environmentally [9,12,19].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

Tetteh

Rathilal

2022

Catalysts

View full text Add to dashboard Cite

This study presents the bio-photocatalytic upgrading of biogas utilising carbon dioxide (CO2) as a potential option for beginning fossil fuel depletion and the associated environmental risks in the pursuit of sustainable development. Herein, magnetite photocatalyst (Fe-TiO2) was employed with an integrated anaerobic-photomagnetic system for the decontamination of municipality wastewater for biogas production. The Fe-TiO2 photocatalyst used, manufactured via a co-precipitation technique, had a specific surface area of 62.73 m2/g, micropore volume of 0.017 cm3/g and pore size of 1.337 nm. The results showed that using the ultraviolet-visible (UV-Vis) photomagnetic system as a post-treatment to the anaerobic digestion (AD) process was very effective with over 85% reduction in colour, chemical oxygen demand (COD) and turbidity. With an organic loading rate (OLR) of 0.394 kg COD/L·d and hydraulic retention time (HTR) of 21 days, a 92% degradation of the organic content (1.64 kgCOD/L) was attained. This maximised the bioenergy production to 5.52 kWh/m3 with over 10% excess energy to offset the energy demand of the UV-Vis lamp. Assuming 33% of the bioenergy produced was used as electricity to power the UV-Vis lamp, the CO2 emission reduction was 1.74 kg CO2 e/m3, with good potential for environmental conservation.

show abstract

Section: The Integrated System Decontamination Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

Tetteh

Rathilal

2022

Catalysts

View full text Add to dashboard Cite

show abstract

Primary treatment with a natural coagulant improved the nanofiltration stage to recover dairy wastewater

Formentini‐Schmitt

Veit

Trigueros

et al. 2023

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Background: The adequate management of dairy effluent is of prime importance to mitigate environmental damages. In addition, its adequate treatment could enable its reuse inside the dairy industry, contributing to a sustainable economy.Results: The optimization of the coagulation/ flocculation/ sedimentation stage through a Box-Behnken Design was proposed using real dairy effluent and natural coagulant of Moringa extracted with CaCl 2 . Then, nanofiltration with a NF 270 membrane was applied, using the raw wastewater and the wastewater pre-treated with coagulation/ flocculation/ sedimentation, enabling apparent color and turbidity removals of >98% in the three studied conditions. A satisfactory chemical oxygen demand (COD) removal of 88.9% was obtained only with the combination of the pre-treatment by coagulation/ flocculation/ sedimentation followed by nanofiltration. When the effluent was subjected to nanofiltration directly, the COD removal did not reach 61%. Besides improving the removal values, the pre-treatment improved the transmembrane flow, reducing the fouling and the membrane total resistance when compared to the dairy wastewater directly subjected to nanofiltration. Conclusion: When the wastewater was pre-treated using the natural coagulant, the nanofiltration stage was improved because the membrane presented a lower fouling (∼10%), lower total resistance and less calcium build-up compared to direct nanofiltration of the wastewater (∼60%). This indicates that the membrane lifespan can be extended when the pre-treatment is applied. The quality evaluation of the treated effluent demonstrated that it presents the potential to be reused inside the dairy industry, which could greatly contribute to a sustainable and economic scenario.

show abstract

A comprehensive review on sewage sludge as sustainable feedstock for bioenergy production

Gizaw,

Periyasamy,

Redda

et al. 2023

Environmental Quality Mgmt

View full text Add to dashboard Cite

The greatly rising amounts of sewage sludge from different sources are causing severe concerns around the globe. Disposal of sewage sludge is exceptionally difficult and poses serious environmental problems due to the significant quantity of toxic heavy metals and organic contaminants in its constituents. This review provides an overview of different conversion methods of sewage sludge into energy, that is, pyrolysis, hydrothermal gasification, hydrothermal liquefaction, hydrothermal carbonization, anaerobic digestion, and transesterification. It also focuses on each conversion route's state‐of‐the‐art research advances, features, and drawbacks to ensure financial and ecological responsibility. The detailed descriptions of the methods and respective energy generation could help scholars and industrialists produce energy from sewage sludge to keep the environment harmless.

show abstract

Anaerobic digestion of dairy wastewater: effect of different parameters and co-digestion options—a review

Cited by 54 publications

References 162 publications

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

Biophotocatalytic Reduction of CO2 in Anaerobic Biogas Produced from Wastewater Treatment Using an Integrated System

Primary treatment with a natural coagulant improved the nanofiltration stage to recover dairy wastewater

A comprehensive review on sewage sludge as sustainable feedstock for bioenergy production

Contact Info

Product

Resources

About