scholarly journals Process Optimisation of Anaerobic Digestion Treating High-Strength Wastewater in the Australian Red Meat Processing Industry

2020 ◽  
Vol 10 (21) ◽  
pp. 7947
Author(s):  
Peter W. Harris ◽  
Bernadette K. McCabe
Keyword(s):  
Anaerobic Digestion ◽  
Waste Treatment ◽  
High Strength ◽  
Cost Effective ◽  
Trace Element Composition ◽  
Red Meat ◽  
Effect Of Temperature ◽  
Meat Processing ◽  
Processing Industry ◽  
Anaerobic Lagoon

This work represents and reviews a compilation of investigations into improving anaerobic digestion performance of high-strength wastewater in the Australian Red Meat Processing industry. The industry produces significant quantities of organic-rich wastewater which requires treatment prior to release to the environment. Anaerobic lagoons are a cost-effective method of waste treatment where land availability is not an issue; however, the high fat load in the wastewater can negatively impact the anaerobic lagoon system and result in compromised anaerobic digestion performance. This paper will discuss the importance of upstream primary pre-treatment and review a series of investigations focused on optimising digester performance and improving fat biodegradability. These studies include: 1. the effect of temperature and mixing; 2. the influence of feedstock trace element composition and supplementation, and; 3. the potential benefit from pre-treatments such as chemical, thermobaric, thermochemical and bio-surfactant. This paper discusses the implications of these findings for covered anaerobic lagoon operation and provides recommendations to promote optimum digester performance and future opportunities in adopting alternate anaerobic digestion technology options. Finally, the paper provides recent trends toward the use of other waste streams for co-digestion and discusses this in terms of digester optimization and technology options.

scholarly journals Airborne Listeria spp. in the red meat processing industry

2011 ◽  
Vol 29 (No. 4) ◽  
pp. 441-447 ◽  
Author(s):  
M. Dobeic ◽  
E. Kenda ◽  
J. Mičunovič ◽  
I. Zdovc
Keyword(s):  
Red Meat ◽  
Positive Case ◽  
Airborne Bacteria ◽  
Meat Processing ◽  
Processing Industry ◽  
Air Samples ◽  
Mesophilic Bacteria ◽  
Processing Plants ◽  
Carcass Contamination ◽  
Settling Rates

The aim of this study was to determine the potential presence of the airborne Listeria spp. and its correlation with the aerobic mesophilic bacteria and Listeria carcass contamination in three red meat slaughtering and three processing plants. Airborne L. seeligeri and L. innocua were determined using 8 (5.06%, n = 158) air samples taken on the locations characteristic for aerosol generating and in a chilly environment. The positive airborne samples of Listeria spp. were in an insignificant (P > 0.05) relation with the highest airborne bacteria counts. On the carcass, only 1 positive case (0.69%, n = 144) of L. innocua was determined, presumably owing to the low airborne Listeria counts and its unpredictable settling rates. In addition, insignificant (P > 0.05) influences of air moisture and airflow on the airborne Listeria were found. Nevertheles, the methods currently used to determine the airborne Listeria and its relationships to aerosol viable mesophilic bacteria and carcass contamination need to be reconsidered in future investigations.

scholarly journals Assessment of antimicrobial potential of substances isolated from some wastes of meat processing industry

10.5219/1079 ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 308-313
Author(s):  
Elena Alexandrovna Kotenkova ◽  
Ekaterina Polishchuk
Keyword(s):  
Antimicrobial Activity ◽  
Oral Cavity ◽  
Cost Effective ◽  
Farm Animals ◽  
Meat Processing ◽  
Processing Industry ◽  
Mucous Membranes ◽  
Proteomic Study ◽  
Mass Spectrometric Identification ◽  
By Products

The slaughter of farm animals generates a large number of by-products. Meat waste management includes various methods, but cost-effective technologies are still in priority. This manuscript reports the results of the study of antimicrobial activity of substances isolated from such wastes of meat processing industry as bovine and pork mucous membranes and epithelial tissues. Proteomic study included two-dimensional electrophoresis with following mass spectrometric identification. Antimicrobial activity against L. monocytogenes, P. aeruginosa and S. aureus of neutralized native extracts and after enzymatic treatment as well as its ultrafiltrates was determined by flow cytometry with EvaGreen and PI dyes. It was shown that a large number of histones were found in bovine mucous membranes as well as several tissue-specific proteins, which would be a precursor of bioactive peptides. Bovine mucous membranes of the tongue and nasal cavity possessed the greatest activity in relation to P. aeruginosa, the rate of surviving cells decreased to 22.0%. Bovine mucous membranes of the rectum and the oral cavity, submandibular lymph nodes, pig mucous membranes of the larynx, tongue, lips, and rectum increased dead cells count up to 40% of all cells. Bovine nasal mucosa and pork mucous of labial cavity possessed the greatest activity against S. aureus, the rate of surviving cells did not exceed 10.0%. Determination of antimicrobial action against L. monocytogenes of native samples and treated with trypsin showed that bovine mucous membranes of the rectum and oral cavity, pork mucosa of the lips and submandibular glands were the most active. Treatment with trypsin or ultrafiltration demonstrated different effects on activity of samples. It was shown the perspectivity of recycling of such type of by-products into effective and demanded substances which can be used, for example, in the food industry as an alternative to chemical preservatives.

scholarly journals Muscle metabolism in sheep and cattle in relation to high rigor temperature – overview and perspective

2014 ◽  
Vol 54 (4) ◽  
pp. 510 ◽  
Author(s):  
P. E. Strydom ◽  
K. Rosenvold
Keyword(s):  
Research Program ◽  
Muscle Metabolism ◽  
Cost Effective ◽  
Meat Processing ◽  
Special Issue ◽  
Processing Industry ◽  
Sheep Meat ◽  
Literature Reviews ◽  
Temperature Window ◽  
The Impact

An increasing number of Australian slaughter plants were found not to meet the Meat Standards Australia (MSA) pH–temperature window, due to high rigor temperatures, particularly at plants where grain-fed animals were slaughtered. Hence, the red meat processing industry in Australia supported a research program focused on resolving this issue, as carcasses that do not meet the MSA pH–temperature window are excluded from MSA grading. This special issue of Animal Production Science describes the outcomes of a major program identifying ante- and post-mortem factors related to heat-induced toughening in both beef and sheep meat through literature reviews and targeted research to find interventions to prevent the impact of high rigor temperature on meat quality, particularly tenderness. This paper provides an overview of the outcomes of the research program, some of which require further research before implementation. It is suggested that an entire supply-chain approach be applied to establish the most efficient and cost-effective way of reducing the incidence of high rigor temperature.

scholarly journals Mathematical model for evaluation of cost-effectiveness of waste treatment technique with energy recovery

2016 ◽  
Vol 20 (suppl. 5) ◽  
pp. 1573-1584
Author(s):  
Biljana Milutinovic ◽  
Gordana Stefanovic ◽  
Ksenija Dencic-Mihajlov ◽  
Petar Djekic ◽  
Aleksandra Boricic
Keyword(s):  
Mathematical Model ◽  
Cost Effectiveness ◽  
Anaerobic Digestion ◽  
Energy Recovery ◽  
Waste Treatment ◽  
Cost Effective ◽  
Operating Costs ◽  
Treatment Technique ◽  
Treatment Facility ◽  
The City

A cost-effectiveness of a specific waste treatment technique is very important factor when making the decision to invest in a waste treatment facility. Waste treatment can bring economic benefit through the value of product: recycled materials, the compost, the generated electricity, or heat. However, the expected economic benefits depend on many factors: the investment costs and operating costs of the waste treatment facility, revenues, the market price of the product obtained by waste treatment etc. The investment and operating costs and the revenue also depend on the amount of treated waste. This paper presents a mathematical model for evaluation of cost-effectiveness in the waste treatment technique with energy recovery depending on the amount of waste, i. e. evaluation the minimum amount of waste to be treated for a cost-effective waste treatment technique with energy recovery. To develop the mathematical model, a socio-economic analysis was used. The model is applied to calculate the lower limit of cost-effectiveness in the waste treatment techniques with energy recovery: incineration and anaerobic digestion, in the city of Nis, Serbia, as a case study. The obtained results show that the amount of waste currently generated in the city of Nis is not sufficient for the cost-effective incineration treatment, but with the currently available amount of waste, anaerobic digestion is the waste treatment that can be operated without losses in the city of Nis.

scholarly journals Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 145
Author(s):  
Cristián Arenas Sevillano ◽  
Alby Aguilar Pesantes ◽  
Elizabeth Peña Carpio ◽  
Elia J. Martínez ◽  
Xiomar Gómez
Keyword(s):  
Anaerobic Digestion ◽  
Biological Treatment ◽  
Waste Treatment ◽  
High Strength ◽  
Transformation Process ◽  
Economic Feasibility ◽  
Fiscal Incentives ◽  
Chemical Products ◽  
Green Chemicals ◽  
By Products

Anaerobic digestion is a well-known technology with wide application in the treatment of high-strength organic wastes. The economic feasibility of this type of installation is usually attained thanks to the availability of fiscal incentives. In this review, an analysis of the different factors associated with this biological treatment and a description of alternatives available in literature for increasing performance of the process were provided. The possible integration of this process into a biorefinery as a way for producing energy and chemical products from the conversion of wastes and biomass also analyzed. The future outlook of anaerobic digestion will be closely linked to circular economy principles. Therefore, this technology should be properly integrated into any production system where energy can be recovered from organics. Digestion can play a major role in any transformation process where by-products need further stabilization or it can be the central core of any waste treatment process, modifying the current scheme by a concatenation of several activities with the aim of increasing the efficiency of the conversion. Thus, current plants dedicated to the treatment of wastewaters, animal manures, or food wastes can become specialized centers for producing bio-energy and green chemicals. However, high installation costs, feedstock dispersion and market distortions were recognized as the main parameters negatively affecting these alternatives.

<i>Bioresource recovery in the Australian red meat processing industry: a technical review of strategies for increased circularity</i>

2020 ◽  
Author(s):  
Lisandra Rocha-Meneses ◽  
Peter Harris ◽  
Stephan Tait ◽  
Diogenes L. Antille ◽  
Timo Kikas ◽  
...  
Keyword(s):  
Red Meat ◽  
Meat Processing ◽  
Processing Industry ◽  
Technical Review

<i>Bioenergy and bioproducts in the Australian red meat processing industry: A case study</i>

2018 ◽  
Author(s):  
Bernadette K McCabe ◽  
Peter W Harris ◽  
Thomas Schmidt ◽  
Diogenes L Antille ◽  
Seonmi Lee ◽  
...  
Keyword(s):  
Red Meat ◽  
Meat Processing ◽  
Processing Industry

High strength nitrogen removal from nightsoil and piggery wastes

2004 ◽  
Vol 49 (5-6) ◽  
pp. 97-104 ◽  
Author(s):  
E. Choi ◽  
Y. Eum ◽  
K.-I. Gil ◽  
S.-W. Oa
Keyword(s):  
Anaerobic Digestion ◽  
Nitrogen Removal ◽  
Biological Treatment ◽  
Waste Treatment ◽  
Combined Treatment ◽  
High Strength ◽  
Soluble Nitrogen ◽  
Nitrogen Loads ◽  
Reactor Temperature ◽  
Nitrification And Denitrification

Nightsoil and piggery wastes generally present high strength organics and nitrogen. This study evaluated the nitrogen removal characteristics with the existing and modified nightsoil and piggery waste treatment plants. The existing conventional plants showed 20 to 40% nitrogen removal, but the modification with SBR or MLE process could remove effectively both nitrogen and organics with the minimum COD/TN and alkalinity/TN ratios of 6 and 3.6, respectively. Nitrite nitrification and denitrification rates obtainable at higher nitrogen loads were faster than the rates of nitrate nitrification and denitrification resulting in less reactor volume requirement. However, the higher nitrogen loads increased the organic loads resulting in the reactor temperature inhibiting nitrification. Thus, a combined treatment with anaerobic digestion with the adjustment of influent bypass rates was proposed to reduce the reactor temperature and the external carbon requirement. The biological treatment could discharge about 1,100 mg/L soluble COD and 50 mg/L soluble nitrogen, respectively.

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