Dairy and swine manure management – Challenges and perspectives for sustainable treatment technology

Varma, V. Sudharsan; Parajuli, Ranjan; Scott, Erin E.; Canter, Tim; Lim, Teng Teeh; Popp, Jennie; Thoma, Greg

doi:10.1016/j.scitotenv.2021.146319

Cited by 70 publications

(26 citation statements)

References 121 publications

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“…Generally, swine wastewater generated from scattering raising households is stored or stabilized in anaerobic lagoons before being applied as biofertilizer on cropland. In intensive pig industries, the associated large amounts of swine wastewater require a series of process equipment with the characteristics of large space and long retention times [ 5 ]. Referring to our previous study on the failure of swine wastewater treatment [ 6 ], the conventional combined anaerobic/aerobic process after solid–liquid separation might be unstable due to high concentrations of “refractory” COD, nitrogen, and phosphorus attached to suspended solids (SS).…”

Section: Introductionmentioning

confidence: 99%

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

Zhang

Han

Zhou

et al. 2023

IJERPH

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The unsatisfactory performance of the conventional swine wastewater treatment is drawing increasing attention due to the large amount of refractory chemical oxygen demand (COD), nitrogen, and phosphorus attached to the suspended solids (SS). In this study, for the first time, a novel process based on bio–coagulation dewatering followed by a bio–oxidation (BDBO) system was developed to treat swine wastewater containing high–strength SS, COD, TN, and TP. Firstly, after the bio–coagulation process, the removal efficiencies of SS, COD, NH3–N, and TP reached as high as 99.94%, 98.09%, 61.19%, and 99.92%, respectively. Secondly, the filtrate of the bio–coagulation dewatering process was introduced into the subsequent bio–oxidation process, in which the residual COD and NH3–N were further biodegraded in a sequence batch reactor. In addition, the dewatering performance of the concentrated swine slurry was substantially improved, with the specific resistance to filtration decreasing from 17.0 × 1012 to 0.3 × 1012 m/kg. Moreover, the concentrated swine slurry was pressed and filtered into a semi–dry cake after pilot–scale bio–coagulation dewatering treatment. Finally, the concentrations of COD and NH3–N in the effluent after the BDBO process, ranging between 150–170 mg/L and 75–90 mg/L, met the relevant discharge standard. Compared to traditional treatments, the BDBO system has excellent large–scale potential for improving the treatment efficiency, shortening the operation period, and reducing the processing costs, and is emerging as a cost–effective alternative for the treatment of wastewater containing high concentrations of SS, COD, TN, and TP.

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Section: Introductionmentioning

confidence: 99%

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

Zhang

Han

Zhou

et al. 2023

IJERPH

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“…Dairy product production impacts the environment in various ways, such as global warming, water eutrophication, land use, biodiversity loss, and so on. , Improper or poor treatment of cow manure can degrade local water resources and cause eutrophication of water . In addition, the feed input required for dairy cows also has a variety of environmental effects. , Excessive use of chemical fertilizers for feed production can lead to eutrophication .…”

Section: Introductionmentioning

confidence: 99%

“…6,7 Improper or poor treatment of cow manure can degrade local water resources and cause eutrophication of water. 8 In addition, the feed input required for dairy cows also has a variety of environmental effects. 9,10 Excessive use of chemical fertilizers for feed production can lead to eutrophication.…”

Section: Introductionmentioning

confidence: 99%

Dairy Trade Helps to Alleviate Global Carbon Emission Pressure

Mao

et al. 2022

Environ. Sci. Technol.

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Global dairy production, consumption, and trade are growing rapidly, driven by population and per capita income growth and increasing health concerns mainly from developing countries, which has aroused concerns about the related carbon emission (mostly in the form of methane) increase. If all of the dairy products consumed were produced locally/domestically in the developing countries/economies (a counterfactual scenario), the carbon emissions in 2018 would be 28 Mt CO2-equiv higher than its status quo (a factual scenario). The present study indicates that unlike in many global trade cases in which carbon leakages are from developed to developing countries, global dairy trade is characterized by net embodied carbon flows from developed to developing countries/economies due to the fact that there is an overwhelming one-way-flow of dairy products from developed to developing countries/economies. The differences in the carbon emission factors between the developed and developing countries/economies provide an opportunity that global dairy trade and production specialization can help to reduce carbon emissions from increasing dairy product demand, and the total reduction potential is estimated to be about 414 Mt CO2-equiv from 2018 to 2030. Free trade agreements such as the Regional Comprehensive Economic Partnership will incentivize larger carbon emission reduction benefits through promoting dairy trade.

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“…In general, livestock manure provides valuable nutrients such as Nitrogen, Carbon, Phosphorous, Potassium, and micronutrients required for plant growth [1,2]. Previous studies showed that manure contains high levels of bioavailable carbon and nitrogen, and the application of manure in cropland can help in replenishing the soil nutrients [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Assessment Impacts of Ozone on Salmonella Typhimurium and Escherichia coli O157:H7 in Liquid Dairy Waste

et al. 2022

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Liquid dairy manure, which is produced in enormous quantities in flush dairy manure management systems, is commonly used as an alternative to chemical fertilizers. It provides nutrient benefits to crops and soils. While dairy waste is a well-accepted and widely used fertilizer, the presence of indicator organisms and human pathogens in manure may lead to pathogen contamination in crops and soils. This study is focused on the examination of ozone gas-based sterilization. In the past, ozone (O3) has been used for sanitizing various foods and solid surfaces, but the potential of O3 for eliminating human pathogens in liquid dairy waste is not studied yet. Pathogens such as Salmonella Typhimurium and Escherichia coli O157:H7 are reported to be present in liquid dairy manure, and this research evaluated the effects of various levels of ozone on the survival of these two pathogens. We designed a continuous type O3 treatment system that has four major components: (1) ozone generator using oxygen; (2) ozone concentration control by mixing with pure air; (3) continuous monitoring of ozone concentrations; and (4) ozone experiment chambers. Various levels of ozone (43.26, 87.40, and 132.46 mg·L−1) were produced in the ozone system, and subsequently, ozone was diffused through liquid manure. Liquid manure was exposed to ozone for multiple durations (30, 60, and 120 min). To determine the effectiveness of O3 in eliminating pathogens, time-series samples were collected and analyzed for determining the levels of S. typhimurium and E. coli O157:H7. Preliminary results showed that ozone concentrations of 132.46 mg/L, and exposure time of 120 min resulted in the reduced levels of E. coli and Salmonella. Low levels of ozone and limited exposure time were found to be less effective in pathogen removal potentially due to high solid contents. Additional studies carrying out experiments to evaluate the impacts of solids in combination with ozone concentrations will provide further insights into developing full-scale ozone-based treatment systems.

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Dairy and swine manure management – Challenges and perspectives for sustainable treatment technology

Cited by 70 publications

References 121 publications

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

Feasibility of Bio–Coagulation Dewatering Followed by Bio–Oxidation Process for Treating Swine Wastewater

Dairy Trade Helps to Alleviate Global Carbon Emission Pressure

Assessment Impacts of Ozone on Salmonella Typhimurium and Escherichia coli O157:H7 in Liquid Dairy Waste

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