Micropollutant biodegradation and the hygienization potential of biodrying as a pretreatment method prior to the application of sewage sludge in agriculture

Pilnáček, Vojtěch; Innemanová, Petra; Šereš, Michal; Michalíková, Klára; Stránská, Štěpánka; Wimmerová, Lenka; Cajthaml, Tomáš

doi:10.1016/j.ecoleng.2018.11.025

Cited by 21 publications

(3 citation statements)

References 48 publications

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“…Another effective technique for the pretreatment of SS for agricultural purposes is the bio-drying, which uses the heat generated by the aerobic activity of microorganisms, aided by the airflow (Pilnáček et al, 2019). Regarding disinfection efficiency, E. coli were completely eliminated, while the enterococci content was reduced by 4 orders of magnitude (Pilnáček et al, 2019).…”

Section: економічні інноваціїmentioning

confidence: 99%

Economic and Technological Principles of Safe Use of Sewage Sludge in Agriculture

Muter¹

2022

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Topicality. Spreading the philosophy of sustainable development, where activities preserve natural and social resources for use by future generations without harming the business economy, as well as significant increases in the price of chemical fertilizers due to rising gas prices require ways to reduce the chemical burden on agriculture. The trend of abandoning intensive technologies will be exacerbated by economic leverage - European Union regulations are increasingly banning agrochemicals and introducing a "carbon tax". Therefore, the use of sewage sludge as fertilizer for agricultural production is becoming an urgent issue. Therefore, the use of sewage sludge as fertilizer for agricultural production on the basis of economic efficiency is becoming an urgent issue.Aim and tasks. The aim of the article is to consider the economic and technological principles aimed at improving the bioavailability of nutrients and reducing the risk of using biowaste before entering the soil, in the context of the idea of sustainable development.Research results. Sewage sludge (SS) application in agriculture has a beneficial effect on soil organic matter content, sorption capacity and an overall improvement in physical properties. Conversion of SS to a soil amendment can be performed by a broad spectrum of methods, which greatly differ by substrate/amendment composition, treatment time, and physicochemical conditions. Sanitary and epidemiological safety is essential, which is why bio-wastes require processing according to selected technologies that aim to improve the bioavailability of nutrients and reduce hazards before entering the soil. This review provides a more complete overview of the present status of the methods for SS disinfection. The review is focused on i) environmental and legislative aspects of SS application in agriculture; ii) risk factors related to the abundance of bacterial, viral, protozoan and other pathogens in SS and methods of SS hygienization by various physical and chemical treatments; iii) risks of soil pollution with biologically active compounds (e.g., antibiotic resistance genes and other emerging contaminants). For the life cycle assessment, an environmental performance and pathogen risk was considered. The results of such consideration have direct impact on the nature of the applied economic and technological measures. Conclusions and perspectives in this field were formulated, using 102 references, including 49 citations dated by the last five years.Conclusion. Numerous technological approaches on SS treatment have their particular advantages, although disinfection efficiency remains unsatisfactory. Legislative requirements are still based on less resistant indicator organisms. Further comprehensive research on SS treatment should be focused on combination of different physical (especially, thermal) and chemical processes, which would convert SS into a qualitative fertilizer with safe microbiological characteristics. The decrease in energy consumption during drying and the reduction of the management costs of these residues can be relevant economic gains. In general, the application of drying to remove water from sewage sludge should be a balance between energy costs in the process and the management costs without drying.

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Section: економічні інноваціїmentioning

confidence: 99%

Economic and Technological Principles of Safe Use of Sewage Sludge in Agriculture

Muter¹

2022

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“…The use of sewage sludge as an organic fertilizer is the safest alternative among available means for the final disposal of this waste, with the advantages of reducing CO2 caused by incineration and the addition of mineral fertilizers in cultivated areas (Pilnáček et al, 2019). This waste has been identified as a fertilizer as it is rich in organic matter and nutrients, leading to improvements in the physical, chemical, and biological properties of the soil, and acting as a nutritional source in crops (Sharma et al, 2017;Eid et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Productivity and nutrition of castor bean fertilized with sewage sludge stabilized by different processes

Nascimento

Durães²,

Sampaio

et al. 2022

RSD

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The objective of this study was to evaluate production in castor bean crop treated with sewage sludge (SS) subjected to different stabilization processes. The experiment was conducted in a Cambisol, with a randomized block design, in subdivided plots, with four replications and six main treatments: without fertilization; fertilization with solarized, composted, vermicomposted, or limed SS; and mineral fertilizer. The secondary treatment was soil depth or plant part. Soil and plant attributes were evaluated by comparing the treatments using the Scott–Knott test (P ≤ 0.05). The fertilization with limed SS resulted in a greater increase in soil fertility-related attributes than with the other fertilizers. The fertilizations increased the P, K, Ca, Mg, and S levels; pH; sum of bases; cation exchange capacity; and the percentage of exchangeable bases in the upper soil layer in comparison to that in the lower layer; however, in general, there was no influence on nutrient content in the plant. Regardless of the stabilization process, fertilization with SS generated castor bean seed yields ranging from 2.56 to 3.02 t ha-1, similar to that with mineral fertilization and higher than that of unfertilized soil.

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“…Another thermal method—referred to as an environmentally friendly technique, mainly due to its reduced emissivity—that can support sludge treatment is microwave radiation, described in detail by Tyagi and Lo ( 2013b ). Bio-drying, which uses the heat generated by the aerobic activity of microorganisms, aided by the airflow, is considered an effective technique for the pretreatment of sludge for agricultural purposes (Pilnáček et al 2019 ). Khanal et al ( 2007 ) presented an excellent literature review on the use of ultrasonic treatment for sewage sludge disintegration.…”

Section: Introductionmentioning

confidence: 99%

Agricultural and non-agricultural directions of bio-based sewage sludge valorization by chemical conditioning

Izydorczyk

Mikula

Skrzypczak

et al. 2021

Environ Sci Pollut Res

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This literature review outlines the most important—agricultural and non-agricultural—types of sewage sludge management. The potential of waste sludge protein hydrolysates obtained by chemical sludge conditioning was reported. The discussed areas include acidic and alkaline hydrolysis, lime conditioning, polyelectrolyte dewatering and other supporting techniques such as ultrasounds, microwave or thermal methods. The legislative aspects related to the indication of the development method and admission to various applications based on specified criteria were discussed. Particular attention was devoted to the legally regulated content of toxic elements: cadmium, lead, nickel, mercury, chromium and microelements that may be toxic: copper and zinc. Various methods of extracting valuable proteins from sewage sludge have been proposed: chemical, physical and enzymatic. While developing the process concept, you need to consider extraction efficiency (time, temperature, humidity, pH), drainage efficiency of post-extraction residues and directions of their management. The final process optimization is crucial. Despite the development of assumptions for various technologies, excess sewage sludge remains a big problem for sewage treatment plants. The high costs of enzymatic hydrolysis, thermal hydrolysis and ultrasonic methods and the need for a neutralizing agent in acid solubilization limit the rapid implementation of these processes in industrial practice. Graphical abstract

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Micropollutant biodegradation and the hygienization potential of biodrying as a pretreatment method prior to the application of sewage sludge in agriculture

Cited by 21 publications

References 48 publications

Economic and Technological Principles of Safe Use of Sewage Sludge in Agriculture

Economic and Technological Principles of Safe Use of Sewage Sludge in Agriculture

Productivity and nutrition of castor bean fertilized with sewage sludge stabilized by different processes

Agricultural and non-agricultural directions of bio-based sewage sludge valorization by chemical conditioning

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