Ozonation of sewage sludge prior to anaerobic digestion led to Methanosaeta dominated biomethanation

Tuncay, Sera; Akcakaya, Merve; İçgen, Bülent

doi:10.1016/j.fuel.2021.122690

Cited by 23 publications

(6 citation statements)

References 38 publications

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“…The resulting solid and significantly stable product can be easily and safely transported outside the WWTP for further treatment or final disposal. Recently, ozonation and other advanced oxidation processes (AOPs), such as Peroxone, have attracted attention for the chemical stabilization and reduction in RMSS and as a pretreatment prior to the biological stabilization of RMSS [146][147][148][149][150][151][152][153][154].…”

Section: Mss Disposal and Nutrient And Chemical Recoverymentioning

confidence: 99%

Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification

Giacomo¹,

Romano

2022

Energies

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Municipal sewage sludge is the residual material produced as a waste of municipal wastewater purification. It is a sophisticated multi-component material, hard to handle. For many years, it has been landfilled, incinerated, and widely used in agriculture practice. When unproperly discharged, it is very polluting and unhealthy. The rapidly increasing global amount of municipal sewage sludge produced annually depends on urbanization, degree of development, and lifestyle. Some diffused traditional practices were banned or became economically unfeasible or unacceptable by the communities. In contrast, it has been established that MSS contains valuable resources, which can be utilized as energy and fertilizer. The objective of the review was to prove that resource recovery is beneficially affordable using modern approaches and proper technologies and to estimate the required resources and time. The open sources of information were deeply mined, critically examined, and selected to derive the necessary information regarding each network segment, from the source to the final point, where the municipal sewage sludge is produced and disposed of. We found that developed and some developing countries are involved with ambitious and costly plans for remediation, the modernization of regulations, collecting and purification systems, and beneficial waste management using a modern approach. We also found that the activated sludge process is the leading technology for wastewater purification, and anaerobic digestion is the leading technology for downstream waste. However, biological technologies appear inadequate and hydrothermal carbonization, already applicable at full scale, is the best candidate for playing a significant role in managing municipal sewage sludge produced by big towns and small villages.

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Section: Mss Disposal and Nutrient And Chemical Recoverymentioning

confidence: 99%

Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification

Giacomo¹,

Romano

2022

Energies

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“…An ozone dosage of 0.06 g O 3 /g total suspended solids was used to achieve the greatest daily elimination efficiency of 32% total solids, 69% volatile suspended solids, 42% volatile solids, 35% chemical oxygen demand, and 60% total suspended solids. Ozone also resulted in a 48% increase in methane-enriched biogas generation via the acetotrophic route (Tuncay et al 2022).…”

Section: Ozonationmentioning

confidence: 99%

Methods to alleviate the inhibition of sludge anaerobic digestion by emerging contaminants: a review

et al. 2022

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The rising occurrence of emerging contaminants in sludges both inhibits the anaerobic digestion of sludges and induces health issues when sludges are recycled in agriculture, calling for methods to remove contaminants. Here we review emerging pollutants in wastewater treatment plants, before and after anaerobic digestion. We present their inhibitory effects and remediation methods to alleviate inhibition. Pharmaceuticals have been detected in about 50% of the sludge samples. Sewage sludge contaminants include 19% of diuretics, 16–21% of lipid-modifying agents, hydrochlorothiazide, diclofenac, furosemide, clarithromycin, atorvastatin, and carbamazepine. Levels of antibiotics, azithromycin, ciprofloxacin, and estrone range from 500 to 600 ng/g in sludges from wastewater treatment plants. Remediation methods comprise electrooxidation, ultrasonication, thermal hydrolysis, ozonation, and bioaugmentation. Fermenting the sludges with acidogenic bacteria reduces the level of emerging pollutants in the supernatant. Nonetheless, liquid digestates still contains emerging pollutants such as sunscreen octocrylene at 147 ug/L and acetaminophen at 58.6 ug/L. As a result, pretreatment of sludge containing emerging pollutants is required.

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“…As the main byproduct of sewage treatment plants (STPs), waste activated sludge (WAS) is hugely generated in daily operations. The total production of WAS in China in 2020 was estimated to be 60 million tons (80% water content), which posed great challenges to the STP operators. , Anaerobic digestion is a promising WAS treatment method as it possesses the abilities to simultaneously realize sludge minimization, stabilization, and resource recycle. , In WAS anaerobic digestion, the abundantly present organic substances are degraded, accompanied by the generation of methane-contained biogas, which means the concept of “waste to energy” is well-realized. , Sludge anaerobic digestion efficiency however is usually very low, which hinders its extensive applications in practical engineering …”

Section: Introductionmentioning

confidence: 99%

“… 1 , 2 Anaerobic digestion is a promising WAS treatment method as it possesses the abilities to simultaneously realize sludge minimization, stabilization, and resource recycle. 3 , 4 In WAS anaerobic digestion, the abundantly present organic substances are degraded, accompanied by the generation of methane-contained biogas, which means the concept of “waste to energy” is well-realized. 5 , 6 Sludge anaerobic digestion efficiency however is usually very low, which hinders its extensive applications in practical engineering.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

Tang

2022

ACS Omega

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This work aims to reveal the effect of potassium permanganate (KMnO 4 ) on the sludge anaerobic digestion process, as well as the relevant mechanisms. Experimental data showed that the biomethane production was gradually increased from 159.3 ± 3.0 to 211.5 ± 5.1 mL/g VSS (volatile suspended solids) when the KMnO 4 content was increased from 0 to 0.08 g/g VSS, with an increasing rate of 32.8%. A further increase in the KMnO 4 dosage however resulted in the decline of the methane yield. First-order kinetic model analysis indicated that higher methane production potentials and hydrolysis rates were achieved in KMnO 4 -added reactors than in the control. Mechanism analysis demonstrated that KMnO 4 not only efficiently disintegrated the sludge flocs, which resulted in the increased contents of dissolved organics, but also enhanced the proportion of biodegradable substances in the sludge liquor. Meanwhile, the biodegradabilities of recalcitrant humus and lignocellulose substances were found to be promoted by KMnO 4 treatment as higher methane yields were attained from KMnO 4 -treated model substrates. 16S rRNA analysis illustrated that the functional microbes participated in anaerobic digestion were largely enriched in the KMnO 4 -pretreated digestor. Furthermore, efficient inactivation of the fecal coliform was achieved by KMnO 4 pretreatment.

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Ozonation of sewage sludge prior to anaerobic digestion led to Methanosaeta dominated biomethanation

Cited by 23 publications

References 38 publications

Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification

Evolution and Prospects in Managing Sewage Sludge Resulting from Municipal Wastewater Purification

Methods to alleviate the inhibition of sludge anaerobic digestion by emerging contaminants: a review

Enhanced Methane Production from Sludge Anaerobic Digestion with the Addition of Potassium Permanganate

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