Computational modeling of wastewater land application treatment systems to determine strategies to improve carbon and nitrogen removal

Dong, Younsuk; Safferman, Steven I.; Nejadhashemi, A. Pouyan

doi:10.1080/10934529.2019.1579536

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…A substantial amount of BOD can be oxidized if the soil is not overloaded. Land application uses 50-70% less energy and reduces greenhouse gas emissions by an estimated 3000 metric tons per year when compared to activated sludge treatment [17]. Soil treatment is the primary reason that BOD is often regulated based on loading because the land application of high-strength wastewater can cause excessive biofilm growth, leading to high levels of moisture within the porosity of the soil.…”

Section: Introductionmentioning

confidence: 99%

“…High NO 3 levels in groundwater can lead to methemoglobinemia, more commonly known as blue baby syndrome. Due to this risk, the U.S. EPA regulates at a 10 mg/L of N limit in groundwater [17]. Denitrification, the conversion of NO 3 to N gas, occurs under anaerobic conditions and requires carbon.…”

Section: Introductionmentioning

confidence: 99%

“…Denitrification, the conversion of NO 3 to N gas, occurs under anaerobic conditions and requires carbon. Achieving denitrification while preventing metal leaching using soil treatment requires careful application [17]. Denitrification will occur in the anaerobic areas of a facultative lagoon, and proper treatment will minimize the risks of high levels of NO 3 in groundwater.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Low-Volume Meat Processing Wastewater and Impact of Facility Factors

Rouland,

Safferman,

Schweihofer

et al. 2024

Water

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Low-volume meat processing facilities often rely on decentralized wastewater treatment due to cost constraints and the lack of access to centralized treatment. Improved characterization of these facilities’ wastewater is crucial for meeting local groundwater discharge permits. This study also directly correlates treatment systems and facility characteristics to the results of the characterization. The total nitrogen (TN), biochemical oxygen demand (BOD), and phosphorus (P) reductions ranged from −15% to 83%, 43% to 95%, and −75% to 62%, respectively. Slaughtering and smoking were found to significantly increase nutrient concentrations. The average TN leaving the slaughterhouses and processing-only facilities was 519 mg/L-N and 154 mg/L-N, respectively. The average BOD produced by the slaughterhouses and processors was 3002 mg/L and 1660 mg/L, respectively. Filtration was found to reduce BOD, chemical oxygen demand (COD), and trace metals. Aeration in a treatment lagoon was found to significantly reduce BOD, COD, and N compounds. The results indicate that even simple decentralized wastewater treatment systems, combined with facility management practices, can substantially reduce permitted wastewater characteristics. The facility with the best BOD removal had an effluent value of 71.3 mg/L, representing a 96% reduction. The facility with the best TN removal had an effluent value of 20 mg/L, representing a 92% reduction prior to discharge.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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