Swine manure digestate treatment using electrocoagulation

Mores, Rúbia; Kunz, Airton; Steffens, Juliana; Dallago, Rogério Marcos; Benazzi, Toni Luis; Amaral, André Cestonaro do

doi:10.1590/0103-9016-2015-0269

Cited by 10 publications

(4 citation statements)

References 31 publications

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“…Another interesting method of nitrogen removal is electrocoagulation. Mores et al ( 2016 ) have shown that inserting electrodes under constant voltage into the digestate removed total nitrogen with 10% efficiency and organic carbon with 70% efficiency. An effective ammonium removal at the level of 95% was also ensured by a vacuum thermal stripping (Ukwuani and Tao 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Treatment of Ammonium-Rich Digestate from Methane Fermentation Using Aerobic Granular Sludge

Świątczak

Cydzik‐Kwiatkowska

2018

Water Air Soil Pollut

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Digestate produced by cofermentation of agricultural waste and manure can be difficult to dispose of because its high ammonium content impedes its use in agriculture due to generation of odor and overfertilization. This study investigated the possibility of treating such nitrogen-rich digestate with aerobic granular sludge depending on the nitrogen load in the reactor. At nitrogen loading rate of 1.0 g TN/(L·day), the nitrogen removal efficiency was high (64.9 ± 9.8%), ammonium nitrogen was completely oxidized, and nitrate was the main nitrification product. At nitrogen loading rate of 3.4 g TN/(L·day), ammonium oxidization was still good (93.6 ± 2.0%), but the percentage of partial nitrification was high (over 68%) and nitrogen removal efficiency worsened to 30.2 ± 2.6%. Despite this, the overall amount of nitrogen removed was 0.86 g TN/(L·day) and was over nearly two times higher than at the lower nitrogen loading rate. At both nitrogen loading rates, in the effluent nitrogen in a form of suspended solids predominated. To diminish the overall N loading in the effluent, treatment is therefore recommended enabling removal of solids, e.g., microfiltration, should be applied, or the digestate should be separated into solid and liquid phases, and only the liquid fraction should be subjected to biological treatment. At high N load in aerobic granules, a very versatile community of N-metabolizing microorganisms was present. More than 50% of all bacteria in aerobic granules were able to metabolize nitrogen, and the predominant genera (35%) was Thauera, which indicated that stable ammonium removal was achieved mostly as a result of heterotrophic nitrification.

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Section: Introductionmentioning

confidence: 99%

Treatment of Ammonium-Rich Digestate from Methane Fermentation Using Aerobic Granular Sludge

Świątczak

Cydzik‐Kwiatkowska

2018

Water Air Soil Pollut

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“…In fact, national pig farming is well established, and Brazil ranks 4 th in the world in production and export of pork. According to Rizzoni et al (2012) and Moraes et al (2016), pig farming is considered by environmental control agencies to be the agricultural activity that results in greater environmental impact.…”

Section: Resultsmentioning

confidence: 99%

“…Industrial pig farming generates large quantities of effluents that require treatment; thus, the anaerobic biodigestion process is an important, low-cost and efficient treatment for the reduction of organic matter in wastewater from pig farming (Amaral et al, 2004;Vivian et al, 2010;Moraes et al, 2016). But the efficiency of anaerobic processes is limited, among other ways, by the concentration of volatile solids in the biodigester and their capacity to mineralize organic matter over hydraulic retention time (Amaral et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Energy management: a synthesis of scientific publications on biodigestion for waste management

Andreazzi¹,

Mendes²,

Oliveira³

et al. 2017

Rev. ambiente água

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Environmentally friendly options for waste disposal and the need for expansion and diversification of the national and international energy matrix are relevant issues today. One technique that supports these goals is anaerobic biodigestion, which generates clean energy from biomass. Accordingly, our goal was to perform a quantitative and qualitative assessment of scientific publications on biodigestion in order to understand the evolution of the technique, which is essential for environmental and economic sustainability. Ninety-nine articles indexed in the Scientific Electronic Library Online between 1980 and 2015 were evaluated. The results showed a significant increase in scientific publications since 2000 which addressed, in addition to environmentally friendly waste management, the energy issue, with the use of biogas. This increase in the number of publications coincides with increased awareness on natural resource management and concern about global energy management. Most of the articles involved a general evaluation of the process, using mainly animal waste from pigs, and emphasizing biodigestion as waste management, since pig farming produces a large volume of waste and has a high environmental impact.Keywords: anaerobic fermentation, biogas, energy, brazilian scientific publications, waste management. Gestão energética: uma síntese dos indicadores quantitativos sobre biodigestão RESUMOOpções ambientalmente corretas de destinação de resíduos e a necessidade de ampliação e diversificação da matriz energética nacional e internacional são assuntos pertinentes na atualidade. Uma das técnicas capaz de atender estas premissas é a biodigestão anaeróbica, que gera energia limpa a partir de biomassa. Desta forma, o objetivo deste trabalho foi realizar uma avaliação quanti e qualitativa sobre o tema biodigestão, entendendo o comportamento científico das publicações sobre esta técnica, fundamental para a sustentabilidade ambiental e econômica. nas publicações científicas a partir de 2000, que abordavam, além da gestão de resíduos ambientalmente correta, a questão energética, com o uso do biogás. Este aumento nas publicações coincide com a maior conscientização acerca dos cuidados com os recursos naturais e a preocupação com a gestão energética mundial. A maioria dos artigos discutiu sobre a avaliação geral do processo, empregando dejetos animais, principalmente de suínos, enfatizando a biodigestão como gestão de resíduos, visto que a suinocultura gera um grande volume de dejetos e ocasiona elevado impacto ambiental.Palavras-chave: biogás, energia, fermentação aneróbica, manejo de dejetos, publicações científicas brasileiras.

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“…In our study, the total reduction efficiency of the combination of TAO and EC led to a 34% decrease in conductivity, which may have increased the pollutant removal effect (Table 4). The pH changed with the formation of Fe-Al hydroxides and polymeric species during the electrolysis process [62,63]. The EC process increases the pH via the release of OH − from the Fe cathode [64,65], while OH − ions also coagulate and reduce the TS by trapping destabilized organic and inorganic species via electrolysis [66].…”

Section: Physical Propertiesmentioning

confidence: 99%

Utilization of Thermophilic Aerobic Oxidation and Electrocoagulation to Improve Fertilizer Quality from Mixed Manure Influent

et al. 2022

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Thermophilic aeration and electrochemical reactions are well-established methods for wastewater treatment to reduce metallic content, organic and inorganic matter, turbidity, coloration, and nutrient levels. In this study, thermophilic aerobic oxidation (TAO) and electrocoagulation (EC) were implemented together to improve the quality of liquid fertilizer by reducing the nutrient load and toxicity of swine manure. The influent in this study was prepared by mixing anaerobic digestate and liquid swine manure at a 1:9 ratio and treating it for 3 days at 50–60 °C in a field-scale TAO system. The TAO effluent was then processed in an EC reactor for 180 min with a 30 V electric supply through two sets of iron and aluminum hybrid electrodes. The combined TAO and EC processes led to a germination index of 133% using the final efflux. The high retention of important nutrients such as total nitrogen and potassium, combined with the 100% reduction in heavy metals, over 60% reduction in trace minerals, and 89% reduction in pollutants in the final product, helped to achieve a higher germination index. Overall, the combination of TAO and EC was demonstrated to be an effective technique for enhancing the quality of liquid fertilizer derived from swine manure.

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Swine manure digestate treatment using electrocoagulation

Cited by 10 publications

References 31 publications

Treatment of Ammonium-Rich Digestate from Methane Fermentation Using Aerobic Granular Sludge

Treatment of Ammonium-Rich Digestate from Methane Fermentation Using Aerobic Granular Sludge

Energy management: a synthesis of scientific publications on biodigestion for waste management

Utilization of Thermophilic Aerobic Oxidation and Electrocoagulation to Improve Fertilizer Quality from Mixed Manure Influent

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