Composting of anaerobic sludge: An economically feasible element of a sustainable sewage sludge management

Cukjati, N.; Zupančič, Gregor Drago; Ros, Margarita; Grilc, Viktor

doi:10.1016/j.jenvman.2012.04.001

Cited by 27 publications

(9 citation statements)

References 21 publications

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“…However, the compost produced can be commercialized at a price of 41-88.53 Euro per tonne, which realizes sludge valorization. 119 However, cost is not the only factor to consider since the sludge itself faces heavy management problems. What we pursue is valorization from the sludge treatment process or conversion of sludge into valuable products.…”

Section: Discussion Of the Sludge Valorization Strategiesmentioning

confidence: 99%

“…Costs of some sludge disposal strategies are shown in Table , where can be seen that sludge composting has the highest cost. However, the compost produced can be commercialized at a price of 41–88.53 Euro per tonne, which realizes sludge valorization . However, cost is not the only factor to consider since the sludge itself faces heavy management problems.…”

Section: Strategies Of Sludge Valorizationmentioning

confidence: 99%

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Strategies of valorization of sludge from wastewater treatment

Sheng

Zhang

2018

J of Chemical Tech & Biotech

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Sludge is regarded as a potential source to achieve valorization via strategies such as resource recovery, sludge based adsorbents preparation, bioflucculants production, sludge manufacturing construction materials preparation, sludge composting and thermal valorization, which are currently common and effective strategies. Appropriate treatment strategies of sludge are of great importance worldwide for the fast growing population and rapidly increasing waste. This mini review summarized some widely used and effective strategies to achieve sludge valorization based on whether the strategy would utilize or reuse the potential of sludge to obtain valuable product and eliminate secondary pollution. Anaerobic digestion of sludge is perceived as a potentially cost‐effective method to achieve sludge reduction and resource recovery including carbon, nitrogen, phosphorus resource recovery coupled with other technologies. Utilizing sludge as raw material for preparation of valuable products including sludge based adsorbents, bioflocculants and construction materials is another aspect to achieve sludge valorization. Sludge composting and thermal valorization are also introduced in the mini review since the two strategies could also achieve sludge valorization. In addition, the strategies mentioned were discussed and analyzed in the mini review from environmental and economic aspects. © 2017 Society of Chemical Industry

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Section: Discussion Of the Sludge Valorization Strategiesmentioning

confidence: 99%

Section: Strategies Of Sludge Valorizationmentioning

confidence: 99%

Strategies of valorization of sludge from wastewater treatment

Sheng

Zhang

2018

J of Chemical Tech & Biotech

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“…Introduction of this alkaline element might have compensated soil acidification that was a result of, among other things, intensive mineralization of sewage sludge organic matter. As it was stated by Cukjati et al [30], using organic waste in the form of sewage sludge and composts introduces organic substance and nitrogen to the soil, which favors the improvement of soil chemical properties. Our research did not show any differences in organic carbon content, total nitrogen content or in the value of C : N ratio in soil with only mineral fertilization and with sewage sludge application.…”

Section: Soil Chemical Propertiesmentioning

confidence: 96%

Effect of Municipal Sewage Sludge on Soil Chemical Properties and Chemical Composition of Spring Wheat

Antonkiewicz

Kuc

Witkowicz

et al. 2019

Ecological Chemistry and Engineering S

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Municipal sewage sludge from rural sewage treatment plants is characterized by a substantial content of organic matter and macronutrients, which can be used in cultivation of cereals. In a farm located in the commune of Iwanowice in the south of Poland (Malopolska province), municipal sewage sludge was applied under spring wheat cultivation. The experiment was set up on heavy soil with slightly acid reaction and medium content of available forms of P, K, Mg. Application of sewage sludge in a dose of 23 Mg fresh matter per hectare (4.21 Mg d.m.) led to no significant changes in chemical properties of the soil. Application of sewage sludge significantly increased yield of spring wheat. That increase led to a significant decrease in the content of N, P, K, Na, Mg and Ca in spring wheat. Utilization of N, Mg, K, P and Ca from sewage sludge by spring wheat was at a level of 82, 63, 44, 36, 9 %, respectively, of the amount introduced with the waste. Application of municipal sewage sludge significantly decreased the value of Ca : P ratio in spring wheat grain and straw. The sewage sludge did not cause a significant change in the values of Ca : Mg, K : Na, K : (Ca+Mg), K : Mg and K : Ca ratios in spring wheat grain and straw. Municipal sewage sludge can be used environmentally, including for fertilization of cereals, provided that environmental standards are kept.

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“…Landfill mining has been recently proposed as an alternative for resource recovery (Krook et al, 2012). These sites are also used for sustainable sludge management, where the anaerobic sludge compost can be used as a landfill cover and thus help to biologically oxidize organic compounds as well as methane, in the landfill gas (Cukjati et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Wastewater disposal to landfill-sites: A synergistic solution for centralized management of olive mill wastewater and enhanced production of landfill gas

Diamantis

Erguder

Aivasidis

et al. 2013

Journal of Environmental Management

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a b s t r a c tThe present paper focuses on a largely unexplored field of landfill-site valorization in combination with the construction and operation of a centralized olive mill wastewater (OMW) treatment facility. The latter consists of a wastewater storage lagoon, a compact anaerobic digester operated all year round and a landfill-based final disposal system. Key elements for process design, such as wastewater pretreatment, application method and rate, and the potential effects on leachate quantity and quality, are discussed based on a comprehensive literature review. Furthermore, a case-study for eight (8) olive mill enterprises generating 8700 m 3 of wastewater per year, was conceptually designed in order to calculate the capital and operational costs of the facility (transportation, storage, treatment, final disposal). The proposed facility was found to be economically self-sufficient, as long as the transportation costs of the OMW were maintained at 4.0 V/m 3 . Despite that EU Landfill Directive prohibits wastewater disposal to landfills, controlled application, based on appropriately designed pre-treatment system and specific loading rates, may provide improved landfill stabilization and a sustainable (environmentally and economically) solution for effluents generated by numerous small-and medium-size olive mill enterprises dispersed in the Mediterranean region.

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Composting of anaerobic sludge: An economically feasible element of a sustainable sewage sludge management

Cited by 27 publications

References 21 publications

Strategies of valorization of sludge from wastewater treatment

Strategies of valorization of sludge from wastewater treatment

Effect of Municipal Sewage Sludge on Soil Chemical Properties and Chemical Composition of Spring Wheat

Wastewater disposal to landfill-sites: A synergistic solution for centralized management of olive mill wastewater and enhanced production of landfill gas

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