A review of sludge characteristics in Lithuania's wastewater treatment plants and perspectives of its usage in thermal processes

Praspaliauskas, Marius; Pedišius, Nerijus

doi:10.1016/j.rser.2016.09.041

Cited by 63 publications

(22 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Bridle and Pritchard [71] described results from pilot-scale installation where during a slow pyrolysis at 450 °C all the P from SS was retained in char. Moreover, the usage of pyrolysis technology and its formed products could potentially reduce environmental pollution [80,81], and biochar added to soil can increase C sequestration and improve soil quality. However, heavy metal deposition in char can be a potential hazard.…”

Section: Pyrolysismentioning

confidence: 99%

Sewage Sludge Thermal Treatment Technologies with a Focus on Phosphorus Recovery: A Review

Kwapiński

Kolinovic

Leahy

2021

Waste Biomass Valor

View full text Add to dashboard Cite

Phosphorus presents a limited, irreplaceable and essential nutrient necessary for the growth of organisms. There is an increasing effort to recover phosphorus from production waste streams. Sewage sludge presents an important source of phosphorus but also contains organic pollutants and heavy metals. Thermal treatment technologies seem to be a promising option to treat sewage sludge and obtain ash/char from which high recovery rate of phosphorus can be reached. In this review, sewage sludge management options in compliance with EU legal requirements are first reviewed. Follows, an overview of sewage sludge thermal treatment technologies including incineration, hydrothermal carbonisation, pyrolysis and gasification, for the purpose of phosphorus recapture. We summarize recent advances in thermal treatment processes of sewage sludge and phosphorus recovery, identify challenges and knowledge gaps. Thermochemical methods proved to have many advantages over pure wet chemical methods for phosphorus recovery. The review provides the foundation for future research aimed at achieving efficient, economic and environmental sustainable recapture of phosphorus from sludge thermal treatment products.

show abstract

Section: Pyrolysismentioning

confidence: 99%

Sewage Sludge Thermal Treatment Technologies with a Focus on Phosphorus Recovery: A Review

Kwapiński

Kolinovic

Leahy

2021

Waste Biomass Valor

View full text Add to dashboard Cite

show abstract

“…The processes for treating sludge vary according to the type of wastewater from which they are deriving, the process used to treat them, and the last disposal method to which the sludge will be destining. The sludge treatment main objectives are to reduce mass and volume, to handling it easily and to increase its biological stability in order to produce a sufficiently harmless material for its disposal [35,36].…”

Section: Sewage Sludge and Its Use To Produce Biogasmentioning

confidence: 99%

Employment of Organic Residues for Methane Production: The Use of Wastes of the Pulp and Paper Industry to Produce Biogas - A Case Study

Martínez-Roldán¹,

Rodríguez-Rosales²,

Cervantes³

et al. 2021

Anaerobic Digestion in Built Environments

View full text Add to dashboard Cite

Many organic residues are being wasted since they are not given a comprehensive management; anaerobic digestion is an alternative to reduce the impact of these residues, and to produce biogas. The chapter includes the state of art about biogas and energy production, and later, the analysis of a study case focusing on the use of pulp and paper wastes to produce biogas. The study was carried out through anaerobic digestion at a bench scale using three temperature phases to treat primary and secondary sludge, establishing operational parameters such as temperature, retention time, and organic loadings. Monitoring of volume, methane concentration in the biogas, volatile solids reduction, volatile fatty acids during the process, the performance of the process in function of methane produced per volatile solids removed is calculated. This case study shows that it is feasible to use the sludge from the company’s wastewater treatment plant (WWTP) for the generation of biogas, thus reducing waste management problems.

show abstract

“…Sewage sludge is comparable to wood biomass in terms of energy content [26][27][28] but with higher inorganic (ash) content. The heating value of sewage sludge dry matter is 17-18 MJ/kg for raw sludge (RS), 14-16 MJ/kg for active sludge (AS) and 8-12 MJ/kg for stabilized sludge (SS) [21,29].…”

Section: Sewage Sludgementioning

confidence: 99%

Energy Recovery from Sewage Sludge: The Case Study of Croatia

2019

View full text Add to dashboard Cite

Croatia produced 21,366 tonnes of dry matter (DM) sewage sludge (SS) in 2016, a quantity expected to surpass 100,000 tonnes DM by 2024. Annual production rates for future wastewater treatment plants (WWTP) in Croatia are estimated at 5.8–7.3 Nm3/people equivalent (PE) for biogas and 20–25 kgDM/PE of sewage sludge. Biogas can be converted into 12–16 kWhel/PE of electricity and 19–24 kWhth/PE of heat, which is sufficient for 30–40% of electrical and 80–100% of thermal autonomy. The WWTP autonomy can be increased using energy recovery from sewage sludge incineration by 60% for electricity and 100% of thermal energy (10–13 kWhel/PE and 30–38 kWhth/PE). However, energy for sewage sludge drying exceeds energy recovery, unless solar drying is performed. The annual solar drying potential is estimated between 450–750 kgDM/m2 of solar drying surface. The lower heating value of dried sewage sludge is 2–3 kWh/kgDM and this energy can be used for assisting sludge drying or for energy generation and supply to WWTPs. Sewage sludge can be considered a renewable energy source and its incineration generates substantially lower greenhouse gases emissions than energy generation from fossil fuels. For the same amount of energy, sewage sludge emits 58% fewer emissions than natural gas and 80% less than hard coal and fuel oil. Moreover, this paper analysed the feasibility of sludge disposal practices by analysing three scenarios (landfilling, co-incineration, and mono-incineration). The analysis revealed that the most cost-effective sewage sludge disposal method is landfilling for 60% and co-incineration for 40% of the observed WWTPs in Croatia. The lowest CO2 emissions are obtained with landfilling and mono-incineration in 53% and 38% of the cases, respectively.

show abstract

A review of sludge characteristics in Lithuania's wastewater treatment plants and perspectives of its usage in thermal processes

Cited by 63 publications

References 23 publications

Sewage Sludge Thermal Treatment Technologies with a Focus on Phosphorus Recovery: A Review

Sewage Sludge Thermal Treatment Technologies with a Focus on Phosphorus Recovery: A Review

Employment of Organic Residues for Methane Production: The Use of Wastes of the Pulp and Paper Industry to Produce Biogas - A Case Study

Energy Recovery from Sewage Sludge: The Case Study of Croatia

Contact Info

Product

Resources

About