Evaluating Institutional Frameworks and Regional Disparities in the Utilization of Wastewater Treatment Plant Sludge in Bulgarian Agriculture: A new Institutional Economics Approach

Hrabrin Bachev; Bilal Kargı; Bekir Cihan Uçkaç

doi:10.22194/JGIAS/25.1494

Author(s)

Hrabrin Bachev Institute of Agricultural Economics, Agricultural Academy, Sofia, Bulgaria

Bilal Kargı Ankara Yıldırım Beyazıt University, Sereflikoçhisar Faculty of Applied Sciences, Department of Banking and Finance, Şereflikoçhisar, Ankara, Turkey

Bekir Cihan Uçkaç Ankara Yıldırım Beyazıt University,Sereflikoçhisar Faculty of Applied Sciences, Department of Banking and Finance, Şereflikoçhisar, Ankara, Turkey

Abstract

The conversion of sludge from wastewater treatment plants (WTP) into economically valuable agricultural products is shaped by a complex interplay of social, economic, technological, agronomic, and institutional factors. Among these, the institutional framework is a key determinant, influencing the behavior and interactions of stakeholders involved in sludge management. This framework, encompassing both governance institutions and institutional environments, establishes both enabling conditions and limitations that steer stakeholder actions, thereby affecting the efficiency and integration of sludge use in agriculture. This study adopts an interdisciplinary approach grounded in New Institutional Economics to assess the institutional framework that governs the utilization of WTP sludge in Bulgarian agriculture. The analysis reveals substantial progress over the past two decades in the development of regulatory, public, private, market, and hybrid mechanisms, which have led to improvements in sludge application practices. However, the study also identifies regional disparities in the sustainability and pace of development. Understanding the underlying factors that limit stakeholder actions and contribute to these regional variations is essential. To address these challenges, further interdisciplinary research is required, along with a comprehensive evaluation of the institutional framework. This includes gathering both micro- and macro-level data from stakeholders, potentially through official agro-statistical systems at national and EU levels. It is crucial to develop a new national strategy for sludge utilization that aligns with contemporary conditions and societal demands, accompanied by targeted support mechanisms for stakeholders, particularly farmers, using tools such as the Common Agricultural Policy (CAP). Furthermore, investigating institutional frameworks and sludge management practices in other EU countries can provide valuable comparative insights, enabling a more accurate assessment of Bulgaria's position and informing future policy strategies. Lessons from other nations' experiences can serve as important guidance for management decisions and long-term planning.

Publication Details

Page(s) 457-465

DOI 10.22194/JGIAS/25.1494

Published Journal: Journal of Global Innovations in Agricultural Sciences, Volume: 13, Issue: 2, Year: 2025

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Keywords

Sludge, policy analysis, new institutional economics, institutional framework, Wastewater treatment plant (WTP), agricultural sludge utilization

References

ANSES .2020 .Sewage sludge produced during the COVID19 epidemic can only be applied to fields after disinfection. The French Agency for Food, Environmental and Occupational Health and Safety, 02 : .

ANSES .2020 .Management of sewage sludge. Retrieved from ANSES website. , 19 : .

Bachev H. .2020 .Agro-eco-governance in Bulgaria: From institutional environment to institutional structure and model of governance. Agricultural Economics and Management, 65 : 12-29.

Bachev H. .2023 .. level? Theoretical and Practical Research in Economic Fields, 14 : 105-125.

Bachev B.,Ivanov B. .2021 .A study on wastewater treatment sludge utilization in Bulgarian agriculture. Technology Audit and Production Reserves, 5 : 35-44.

Bachev B.,Ivanov B. . .Identification of factors for agricultural use of sludge from wastewater treatment in Bulgaria. The IUP Journal of Supply Chain Management, 18 : 48-71.

Bachev B.,Ivanov B. . .Efficiency and factors for agricultural use of sludge in circular Bulgarian economy. Journal of Applied Economic Sciences, 16 : 280-301.

Bachev B.,Ivanov B. . .Agricultural sludge utilization in Bulgarian circular economy. Progress in Economics Research Nova Science USA, 48 : 53-86.

Bachev B.,Ivanov B. .2022 .Transforming sludge from a waste into product in circular economy of Bulgarian agriculture. Economía Coyuntural, 7 : 1-32.

Bachev B.,Ivanov B. . .Factors for inclusion of wastewater treatment sludge in agri-food chain in Bulgaria. Journal of Economics Library, 8 : 107-129.

Bachev H.,Ivanov B.,B. B.,Sarov A. .2020 .Unpacking governance sustainability of Bulgarian agriculture. Economic Studies, 6 : 106-137.

Bachev H.,Ivanov B.,Kargi B.,Uçkaç B.C. .2023 .Governance in agricultural markets, organizations and development. Gazi Kitabevi, : .

Bachev B.,Kargi B. .2023 .A comprehensive study on the competitiveness of governing structures of Bulgarian farming. Turkish Journal of Agriculture - Food Science and Technology, 11 : 2466-2475.

.1986 .Council Directive on the protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture. Official Journal of the European Communities., 86 : .

EC .2008 .Environmental, economic and social impacts of the use of sewage sludge on land. Retrieved, : .

Ekane N.K.,Barquet A.,Rosemarin A. .2021 .Resources and risks: Perceptions on the application of sewage sludge on agricultural land in Sweden: A case study. Frontiers in Sustainable Food Systems, 5 : 1-18.

EU. .2016 .Sewage Sludge Utilization in the European Union: Current Practices and Future Directions. EU Environmental Report, : 1-50.

EU. .2021 .Roundtable discussion on sludge use. , : .

EurEau. .2021 .Waste water treatment -sludge management. Eur Eau., : .

Furubotn E.,Richter R. .2005 .Institutions and economic theory: the contribution of the new institutional economics. , : .

Hudcová H. J.,Vymazal M.,Rozkošný M. .2019 .Present restrictions of sewage sludge application in agriculture within the European Union. Soil and Water Research, 14 : 104-120.

IEA. .2021 .. Bulgaria: Annual Report, : .

Iticescu C.,Georgescu P.,Arseni M.,Rosu A.,Timofti M.,Cioca L. .2021 .Optimal solutions for the use of sewage sludge on agricultural lands. Water, 13 : 585.

Ivanov B. and H.,Bachev B. and H. .2021 .Convergent analysis of waste water practices among EU countries. Bulgarian Journal of Agricultural Science, 27 : 289-296.

Kargı B. and H.,Bachev B. and H. .2024 .A multi-dimensional framework for assessing farm competitiveness with legal structures. Problems of Agricultural Economics, 381 : 50-78.

Kelessidis A.,Stasinakis A.S. .2012 .Comparative study of the methods used for treatment and final disposal of sewage sludge in European countries. Waste Management, 32 : 1186-1195.

North D. .1991 .Institutions. Journal of Economic Perspectives, 5 : 97-112.

NSPMSWTPB. .2014 .Ministry of Environment and Water. , : .

Ordinance .2017 .Ordinance on the procedure and method for the utilization of sewage sludge through the use in agriculture. Promulgated SG No. 55 of 07.07, : .

Regulation .2017 .Regulation on the procedures and requirements for the utilization of sewage sludge in agriculture. SG No. 55 of 07.07, : .

Rosemarin A.,Macura B.,Carolus J.,Barquet K.,Ek F.,Järnberg L.,Lorick D.,Johannesdottir S.,Pedersen S.,Koskiaho J.,Haddaway N.,Okruszko T. .2020 .Circular nutrient solutions for agriculture and wastewater: A review of technologies and practices. Current Opinion in Environmental Sustainability, 45 : 78-91.

Rosiek K. .2020 .Directions and challenges in the management of municipal sewage sludge in Poland in the context of the circular economy. Sustainability, 12 : 3686.

Schaubroeck T. .2015 .Quantifying the environmental impact of the agricultural use of sewage sludge: A review. Science of the Total Environment, 537 : 857-872.

Scozzari A.,Mansouri B. .2011 .Water security in the mediterranean region, an international evaluation of management, control. and governance approaches, : .

Smith S.R. .2009 .Organic contaminants in sewage sludge (biosolids) and their significance for agricultural recycling. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 367 : 4005-4041.

Stefanakis A.I.,Tsihrintzis V.A. .2012 .Use of constructed wetlands for wastewater treatment and reuse in developing countries: A review. Ecological Engineering, 47 : 54-70.

Taşeli B. .2020 .Comparative life cycle assessment of sewage sludge (Biosolid) management options. Sustainable Sewage Sludge Management and Resource Efficiency, : 1-20.

Tesfamariam E.,Ogbazghi Z.,Annandale J.,Gebrehiwot Y. .2020 .Cost-benefit analysis of municipal sludge as a low-grade nutrient source: A case study from South Africa. Sustainability, 12 : 9950.

European Green Deal The .2019 .Communication from the commission to the European parliament, the European council, the European economic and social committee and the committee of the regions. , 11 : 12.

Tsagarakis K.P. .2004 .Economic evaluation of sewage sludge composting methods in the perspective of agricultural utilization in Greece. Waste Management & Research, 22 : 187-194.

Usman K.,Khan S.,Ghulam S.,Umar M.,Khan N.,Khalil S. .2012 .Sewage sludge: an important biological resource for sustainable agriculture and its environmental implications. American Journal of Plant Sciences, 3 : 1708-1721.

Williamson O.E. .2005 .The economics of governance. American Economic Review, 95 : 1-18.