Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Iticescu, Cătălina; Georgescu, Puiu-Lucian; Arseni, Maxim; Roșu, Adrian; Timofti, Mihaela; Carp, Gabriel Bogdan; Cioca, Lucian‐Ionel

doi:10.3390/w13050585

Cited by 29 publications

(9 citation statements)

References 37 publications

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“…During the treatment of wastewater in a wastewater treatment plant, an excessive amount of wastewater sludge is produced. The resulting sludge can be and is used for either fertilization purposes [16,17] or anaerobic digestion (AD), i.e., biogas production. The product of the AD, as discussed in the Introduction, is mainly methane and carbon dioxide.…”

Section: Efficiency Indicatorsmentioning

confidence: 99%

Microwave and Ultrasound Based Methods in Sludge Treatment: A Review

et al. 2021

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The amount of waste activated sludge (WAS) is increasing annually, and since it presents potential environmental and health-related risks, an appropriate treatment and stabilization process is needed. It has been shown in numerous studies in the past few decades that amongst the advanced treatment methods of sludge, microwave and ultrasound-based processes offer promising and effective alternatives. The main advantage of these physical methods is that they are energy-efficient, easy to implement and can be combined with other types of treatment procedures without major difficulties. In this review article we would like to present the recent scientific results of the microwave, ultrasound and combined (microwave-alkaline, microwave-H2O2, ultrasound-alkaline and ultrasound-H2O2) treatment of wastewater sludge, in terms of different process-efficiency indicators. Although the obtained results somewhat vary between the different scientific papers, it can be undoubtedly stated that both MW and US—either individually or in combination with chemical treatments—can enhance several aspects of sludge processing, like increasing the SCOD/TCOD rate, disintegration degree (DD), or the anaerobic digestibility (AD), but the extent of these increments clearly depends on the treatment conditions or parameters.

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Section: Efficiency Indicatorsmentioning

confidence: 99%

Microwave and Ultrasound Based Methods in Sludge Treatment: A Review

et al. 2021

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“…The presence of various microorganisms in sewage sludge is also of interest, such as heterotrophic and chemoautotrophic bacteria, saprophytes and pathogens [Zhang et al, 2015]. The characteristics of sewage sludge depend on the degree of pollution and the type of pollutants in the treated wastewater [Iticescu et al, 2021].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Composition of Municipal Wastewater Sludge from Small Settlements in East Kazakhstan

Литвинов¹,

Daumova²,

Shaikhov³

et al. 2022

J. Ecol. Eng.

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One of the greatest environmental problems of modern countries is the pollution of territories with waste. Of particular concern are the wastes generated during the treatment of municipal wastewater, i.e. sewage sludge. They are the inevitable price of urbanization and improved quality of life. As a result of the research conducted, a comprehensive analysis of the composition of municipal sewage sludge was conducted using the example of four small settlements in East Kazakhstan. The results of laboratory studies established the composition of the organic part, biogenic elements, as well as microbiological and parasitological indicators. It was revealed that cadmium, copper, zinc and arsenic are main sources of problems in wastewater treatment plant sludge. For copper and zinc, the standards set by the European Directive 86/278/EEC were exceeded by up to 3.2 and 1.5 times, respectively. At the same time, there is an increased content of nutrients. Organic matter in all studied samples exceeds the minimum established values by 3.5-3.7 times; the potassium content in all studied samples is 5.1-5.6 times higher than the minimum established value for organomineral fertilizers in the Republic of Kazakhstan. The concentration of hydrogen ions (pH) corresponds to neutral. Tests for the determination of microbiological and parasitological parameters indicate that the studied sludge does not contain various pathogenic bacteria and microorganisms.

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“…Arround the globe, there are numerous studies on the factors and efficiency of sludge use in agriculture (Barbu, 2012;Daniels, 2011;Iticescu et al, 2021;EC, 2008;2021;Ekane et al, 2021;Hudcová et al, 2019;Rosiek, 2020;Rosemarin et al, 2020;Scozzari and Mansouri, 2011;Taşeli, 2020;Tesfamariam et al, 2020;Usman et al, 2012). Interest in this area is growing even more in connection with the new challenges related to environmental pollution, climate change, protection of human and animal health, the current COVID pandemic and others.…”

Section: Introductionmentioning

confidence: 99%

Efficiency and factors for agricultural use of sludge in circular Bulgarian economy

Bachev¹,

Ivanov²

2021

SSRN Journal

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The issue of utilization of sludge from wastewater treatment in agriculture is an important socio-economic and environmental problem in the European Union and Bulgaria. Its significance is determined by the fact that the amount of sludge formed is constantly growing, as the annual amount of sludge produced in Europe is 8.7 million dry matter, and in Bulgaria reaches 53 thousand tons of dry matter. One of the main ways to utilize sludge from wastewater treatment in its use as fertilizer in agriculture. It is becoming topical issue along with the growing interests into effective "transformation of wastes into products" and their inclusion in supply chains and circular economy.In other countries, there are numerous studies on the effects, factors and efficiencies of sludge use in agriculture. Despite their relevance, in-depth studies of the diverse effects and critical factors of sludge utilization in Bulgarian agriculture are at an early stage. This paper presents results of the first part of a large-scale study aimed at determining the socio-economic effects of sludge utilization in Bulgarian agriculture. First, an approach is presented to assess the multilateral effects, efficiencies and factors of sludge utilization in agriculture. Then the various factors stimulating and limiting the utilization of sludge in Bulgarian farms are identified. The results of a case study of a holding using sludge as fertilizer are then presented.Based on a qualitative analysis of regulations and institutional structure, and surveys with managers and experts of urban wastewater treatment plants, and farmers using and notusing sludge, the institutional, political, organizational, personal, educational, informational, social, economic, and environmental factors influencing the utilization of sludge in agriculture in two regions of the country (Sofia and Burgas) are identified. Impact factors are generally divided into two types: factors influencing the behavior of agents, and factors determining the type and extent of the effects of sludge use in agriculture. Research of this type is to continue and deepen to establish the economic, sectoral and regional specificities on the basis of more representative information from all participants and interested parties in the effective utilization of sludge in the country.

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Optimal Solutions for the Use of Sewage Sludge on Agricultural Lands

Cited by 29 publications

References 37 publications

Microwave and Ultrasound Based Methods in Sludge Treatment: A Review

Microwave and Ultrasound Based Methods in Sludge Treatment: A Review

Analysis of the Composition of Municipal Wastewater Sludge from Small Settlements in East Kazakhstan

Efficiency and factors for agricultural use of sludge in circular Bulgarian economy

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