Characterization of the physicochemical composition of anaerobically digested (digestate) high throughput red meat abattoir waste in South Africa and the determination of its quality as a potential biofertilizer

Matjuda, Dikonketso Shirleymay; Tekere, Memory; Thaela-Chimuka, Mary-Jane

doi:10.1016/j.heliyon.2023.e21647

Cited by 4 publications

(3 citation statements)

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“…The current study is related to the previous published study by Matjuda et al [36], where the main focus was characterizing the final treated by-product, which is digestate, and its biofertilizer potential as well as its sanitary quality (step 3). The previous study by Matjuda et al [36] did not present the physicochemical characteristics of red meat abattoir solid slaughter waste feedstock prior to AD (step 1) (using similar techniques) and its biomethane yield (step 2), hence this study intends to present the data and also fill the knowledge gaps stated in this current study. This study may serve as a model to develop processes to harvest value-added products such as green energy and biofertilizer from solid slaughter waste rather than disposing it in landfills, thus causing various forms of environmental pollution and promoting a circular economy through waste to energy.…”

Section: Introductionmentioning

confidence: 93%

“…Abattoir slaughter waste such as meat trimmings, blood, offal (green and red), intestinal organs, and rumen contents were collected for a period of a year from March 2021 to February 2022. Samples including rumen contents, offal (green and red), intestinal organs, and meat trimmings were collected in polyester bags, while blood samples were collected in 1 L sterilized containers according to Matjuda et al [36]. Samples were transported and prepared for physicochemical analysis in accordance with Matjuda et al [35].…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

“…The following physicochemical analyses were conducted on abattoir samples in accordance with methods described by Matjuda et al [36]: pH, total solids (TS), volatile solids (VS), moisture content, chemical oxygen demand (COD), ammonia (NH 4 + ), carbon, nitrogen (N). The VS (organics) were further broken down into primary constituents of fats, proteins and carbohydrates, where fats and proteins were determined in accordance with Commission Regulation 142/2011/EU, implementing the ABPR (European Commission, 2009, European Commission, 2011) as described by [37].…”

Section: Determination Of Feedstock's Physicochemical Characteristicsmentioning

confidence: 99%

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Impact of Thermal Pretreatment on the Physicochemical Characteristics and Biomethane Yield Potential of Solid Slaughter Waste from High-Throughput Red Meat Abattoirs Valorized as a Potential Feedstock for Biogas Production

Matjuda,

Tekere,

Thaela-Chimuka

2024

Sustainability

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Rapid urbanization worldwide results in high demand for meat products, which in turn result in high numbers of animals being slaughtered for human consumption to meet food security demands, especially in low-income countries such as South Africa. The waste produced during slaughtering can serve as feedstock for biogas production. This study aims to determine the impacts of pasteurization and sterilization pre-treatments on high-throughput red meat abattoir solid slaughter waste’s physicochemical properties and biomethane yield when used as a feedstock for biogas production. Abattoir solid slaughter waste was collected from 45 high-throughput red meat abattoirs across South Africa and the various physicochemical properties were determined using standard methods, along with the impact of sterilization and pasteurization on red meat abattoir waste. Biomethane yield analysis was performed using AMPTS II with a hydraulic retention time of 40 days. Pasteurization and sterilization pretreatment was seen to increase physicochemical parameters such as pH, volatile solids, total solids, carbon, and nitrogen analyzed in all samples. Pasteurization and sterilization were also seen to increase biomethane yield, where methane production ranged from 610.67 Nml to 1756.30 Nml, 1592.20 Nml to 3319.30 Nml, and 949.57 Nml to 3297.87 Nml for untreated, sterilized, and pasteurized samples, respectively. There was no significant difference (p < 0.05) observed in the effect pasteurized and sterilized samples had on physicochemical properties and biomethane yield. It can be concluded that pasteurization and sterilization enhance the bioavailability of the physicochemical properties and biomethane yield of red meat solid slaughter waste when valorized as feedstock for biogas production.

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Section: Introductionmentioning

confidence: 93%

Section: Sample Collection and Preparationmentioning

confidence: 99%

Section: Determination Of Feedstock's Physicochemical Characteristicsmentioning

confidence: 99%

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Impact of Thermal Pretreatment on the Physicochemical Characteristics and Biomethane Yield Potential of Solid Slaughter Waste from High-Throughput Red Meat Abattoirs Valorized as a Potential Feedstock for Biogas Production

Matjuda,

Tekere,

Thaela-Chimuka

2024

Sustainability

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Systematic Approach to the Formation of Quality and Environmental Safety of Biofertilizer From Digestate

Sipko,

Ablieieva

2024

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The use of anaerobic digestate as a biofertilizer is quite promising in terms of soil protection technologies in view of the reduction of environmental risks from the use of mineral fertilizers and the positive impact on soil productivity, improvement of their quality and restoration of the humus layer. However, anaerobic digestion does not ensure the complete absence of environmental hazards due to a certain probability of heavy metals, pharmaceutical substances, and pathogenic microorganisms entering the soil with biofertilizer. The article is aimed at determining effective methods of processing raw materials and digestate, as well as technological approaches for obtaining biofertilizer from digestate for use in geosphere protection technologies. The methodological basis of the study was a meta-analysis based on scientific publications within the framework of a systematic approach to the formation of the quality and ecological safety of fertilizer from digestate. It was established that the type of substrate initially affects the content of nutrients and pollutants, but the use of methods of pretreatment of raw materials, thermal and chemical, has the potential to balance the ratio of NPK and remove heavy metals. The most relevant is the choice of digestate separation technology. Thus, it is essential to apply post-treatment methods to raw digestate and its individual fractions. The creation of granulated organo-mineral fertilizers and the production of biochar from the solid fraction of digestate are suggested as environmentally safe products for soil protection technologies.

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Microbiological and Physicochemical Characterization of Abattoir Wastewater in Obio/Akpor Local Government Area of Rivers State, Nigeria

Aleruchi,

Okundaye,

Ekongson

et al. 2024

Juvenis Scientia

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Introduction. The spread of pathogenic bacteria from food production processes has become a problem worldwide. Abattoir effluents are potential carriers of resistant pathogenic bacteria and could contribute to these strains’ global spread in the environments. This study extensively analyzed abattoir wastewater in Obio/Akpor (Nigeria), focusing on its microbiological and physicochemical aspects. Materials and Methods. 250 ml of abattoir wastewater samples were aseptically collected from each of four different abattoirs within Obio/Akpor using standard methods. The study was conducted from September 2023 to November 2023. Frequency of occurrence, percentage occurrence, charts, mean count and standard deviation of microbiological parameters were generated. Physicochemical parameters were identified using American Public Health Association (APHA) gold standard. Results. Microbiological assessments showed that the total heterotrophic bacteria count obtained ranged from 2.6 ± 0.14 × 107 to 6.5 ± 0.28 × 108 CFU/ml. E. coli count obtained ranged from 2.3 ± 0.07 × 106 to 2.6 ± 0.14 × 106 CFU/ml. The total coliform counts ranged from 2.5 ± 0.07 × 103 CFU/ml to 4.3 ± 0.07 × 108 CFU/ml. Vibrio count of 4.5 ± 0.70 × 103 CFU/ml was only recorded from Choba while fungal count was only recorded from Rumuokoro (1.1 ± 0.70 × 104 CFU/ml) and Rumuodara (2.8 ± 0.70 × 105 CFU/ml). For the physicochemical parameters, pH ranged from 5.58 to 7.05, Total Dissolved Solids (TDS) ranged from 4.26 to 7.21 mg/l, Total Suspended Solids (TSS) ranged from 2.01 to 4.86 mg/l, Phosphate ranged from 1.13 to 2.42 mg/l, Nitrate ranged from 4.97 to 10.27 mg/l, Dissolved Oxygen (DO) ranged from 13.93 to 26.25 mg/l, Biochemical Oxygen Demand (BOD) ranged from 7.06 to 15.43 mg/l and Chemical Oxygen Demand (COD) ranged from 165.42 to 256.38 mg/l. Conclusion. The study emphasizes the diverse microbial composition and physicochemical characteristics of abattoir wastewater, highlighting environmental and public health concerns. Effective wastewater treatment pre-discharge into water bodies is vital to mitigate adverse impacts.

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Characterization of the physicochemical composition of anaerobically digested (digestate) high throughput red meat abattoir waste in South Africa and the determination of its quality as a potential biofertilizer

Cited by 4 publications

References 28 publications

Impact of Thermal Pretreatment on the Physicochemical Characteristics and Biomethane Yield Potential of Solid Slaughter Waste from High-Throughput Red Meat Abattoirs Valorized as a Potential Feedstock for Biogas Production

Impact of Thermal Pretreatment on the Physicochemical Characteristics and Biomethane Yield Potential of Solid Slaughter Waste from High-Throughput Red Meat Abattoirs Valorized as a Potential Feedstock for Biogas Production

Systematic Approach to the Formation of Quality and Environmental Safety of Biofertilizer From Digestate

Microbiological and Physicochemical Characterization of Abattoir Wastewater in Obio/Akpor Local Government Area of Rivers State, Nigeria

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