Valuable compounds from sewage sludge by thermal hydrolysis and wet oxidation. A review

Suárez-Iglesias, Octavio; Urrea, José Luis; Oulego, Paula; Collado, Sergio; Dı́az, Mario

doi:10.1016/j.scitotenv.2017.01.140

Cited by 106 publications

(31 citation statements)

References 83 publications

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“…The ranges of NH 4 + that wetland plants can tolerate differs among species [46]. Most species show NH 4 + toxicity symptoms when the NH 4 + concentration is higher than 5 mM [47][48][49][50][51][52]. Li et al [53] found that T. angustifolia reduced total chlorophyll content when exposed to 5 mM NH 4 + , nonetheless growth and plant morphology were not determined in their study.…”

Section: Resultsmentioning

confidence: 99%

Treatment of Anaerobic Digester Effluent Using <i>Typha angustifolia</i> L.: Growth Responses and Treatment Efficiency

Pincam

Jampeetong

2020

J. of Wat. & Envir. Tech.

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Constructed wetlands are an eco-friendly technology used for decades for treating various types of wastewater. To gain new insight into plant selection for wastewater treatment systems in tropical areas, this research investigated growth and ecophysiological responses of Typha angustifolia to different concentrations of anaerobic digester effluent from a swine farm and assessed their influence on wastewater treatment effectiveness. Twelve plants (n = 4 per treatment) were separately grown in 3 concentrations of wastewater (25% and 50% diluted wastewater and undiluted wastewater). All plants grew well in all concentrations. However, the plants tended to have reduced root biomass, root length and decreased pigment contents when exposed to high concentrations. High removal efficiency for electrical conductivity, total dissolve solids, total suspended solids, biochemical oxygen demand, chemical oxygen demand, ammonium nitrogen and orthophosphate was found (73%, 70%, 93%, 99%, 82%, 99% and 80%, respectively, from undiluted wastewater). The dissolved oxygen concentration in the anaerobic digester effluent increased over time because of released root oxygen. The study showed that T. angustifolia developed aerenchyma in its root cortex even under stress conditions. This ability makes this plant tolerant to high strength wastewater. Furthermore, oxygen released from its roots also supports growth of microorganisms and enhances microbial biodegradation processes leading to highly efficient treatment systems.

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Section: Resultsmentioning

confidence: 99%

Treatment of Anaerobic Digester Effluent Using <i>Typha angustifolia</i> L.: Growth Responses and Treatment Efficiency

Pincam

Jampeetong

2020

J. of Wat. & Envir. Tech.

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“…For the purpose of obtaining a final product of sludge which can be used as fertilizers in farm soils, Pereira et al [29] discussed removal technologies of toxic metals from sewage sludge through chemical, physical, and biological treatments. Additionally, review studies on thermal hydrolysis [30], nitrogen, and phosphorus removal [31] of sludges are well presented.…”

Section: Introductionmentioning

confidence: 99%

Classification and Disposal Strategy of Excess Sludge in the Petrochemical Industry

et al. 2019

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The excess sludge in the petrochemical industry is large in quantity, complex in composition, and highly harmful, and its rational disposal is of great significance for environmental protection and sustainable development. In the present study, a classification and disposal strategy for the excess sludge in the petrochemical industry is proposed. The strategy first analyzes the dioxin, flammability, corrosivity, reactivity, and leaching properties of the sludge, from which the waste type of the sludge (general waste or hazardous waste) can be determined. Then, methods of disposal can be selected depending on the type of waste and the corresponding risk analysis, enabling rationalized disposal of the sludge. To verify the effectiveness and practicability of the proposed sludge classification and disposal strategy, research on petrochemical excess sludge samples (i.e., Ah, Bl, and Cq) originated from three different regions in China is carried out as a case study. The component analysis of the above three sludge samples revealed that they are all general wastes. In addition, the possibility of employing Cq sludge for landfill, soil modification, and greening mud, as well as the risk of landfill and incineration disposal in solid waste landfills are investigated. Furthermore, natural radioactive elements uranium and thorium in Cq sludge sample are studied. The results show that Cq sludge cannot be used for landfill, soil modification, and greening mud due to excessive arsenic content. The proposed strategy provides a basis for the selection of reasonable petrochemical excess sludge disposal methods.

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“…There are systems, processing the mixture of PS and WAS, and systems processing exclusively WAS. Sewage sludge contains a large amount of water, and consequently, thermal hydrolysis may be used to produce chemical compounds therefrom [7]. High-temperature thermal hydrolysis positively affects the solubilization of organics and biopolymers in sludge [8].…”

Section: Introductionmentioning

confidence: 99%

Improving efficiency of transport fuels production by thermal hydrolysis of waste activated sludge

Gulshin

2017

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. The article deals with issues of transport biofuels. Transport biofuels are an important element of a system of energy security. Moreover, as part of a system it is inextricably linked to the urban, rural or industrial infrastructure. The paper discusses methods of increasing the yield of biogas from anaerobic digesters at wastewater treatment plants. The thermal hydrolysis method was considered. The main advantages and drawbacks of this method were analyzed. The experimental biomass (from SNDOD-bioreactor) and high-organic substrate have been previously studied by respirometry methods. A biomethane potential of the investigated organic substrate has high rates because of substrate composition (the readily biodegradable substrate in the total composition takes about 85%). Waste activated sludge from SNDOD-bioreactor can be used for biofuel producing with high efficiency especially with pre-treatment like a thermal hydrolysis. Further studies have to consider the possibility of withdrawing inhibitors from waste activated sludge.

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Valuable compounds from sewage sludge by thermal hydrolysis and wet oxidation. A review

Cited by 106 publications

References 83 publications

Treatment of Anaerobic Digester Effluent Using <i>Typha angustifolia</i> L.: Growth Responses and Treatment Efficiency

Treatment of Anaerobic Digester Effluent Using <i>Typha angustifolia</i> L.: Growth Responses and Treatment Efficiency

Classification and Disposal Strategy of Excess Sludge in the Petrochemical Industry

Improving efficiency of transport fuels production by thermal hydrolysis of waste activated sludge

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