Effects of pH modulation on the concentrations of odorous compounds from pit slurry of a pig operation building

Hwang, Ok-Hwa; Park, Sungkwon; Jung, Min-Woong; Han, Deug‐Woo; Nho, Whan-Gook; Cho, Sung-Back

doi:10.15250/joie.2018.17.1.1

Cited by 6 publications

(1 citation statement)

References 34 publications

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“…Because the reduction in NH 4 -N can subsequently reduce the generation of harmful gases, such as NH 3 , in the slurry pit, as reported in recent studies [ 26 , 27 , 28 , 29 , 30 ], in order to understand the NH 3 emission reduction effect of the real-time controlled BCS, the theoretical NH 3 gas mass generated from each slurry pit was estimated using the NH 4 -N concentration and pH data, and the NH 3 concentration inside the pig sty was monitored. Therefore, the theoretical NH 3 generation values of NBCS and BCS were 21.6 and 12.7 mg/m 3 ·d, respectively, which was approximately 41.0% lower in BCS, and the monitored NH 3 concentration also averaged 14.6 ± 3.4 ppm in NBCS and 5.6 ± 1.6 ppm in BCS, yielding a 61.6% reduction in BCS.…”

Section: Resultsmentioning

confidence: 99%

Real-Time Control Technology for a Bio-Liquor Circulation System in a Swine Barn with Slurry Pit: Pilot Scale Study

Kim

Shim

Won

et al. 2022

Animals

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The livestock industry, especially swine production, has been pressurized by vicinity complaints about odor in Korea. Therefore, a lot of effort has been undertaken regarding reducing the odor emissions from pigsties, widely carried out and the washing out manure in slurry pit by liquid-phase compost has particularly been spotlighted with outstanding performance of odor reduction. However, such a washing out manure called bio-liquor circulation system (BCS) has been controlled by a timer with designated reaction time, which cannot guarantee the system performance. This research proposes an effective real-time control technology for BCS, which circulates bio-liquor to the slurry pit of swine barns. The real-time control system was operated through accurate detection of the designated control points on the oxidation reduction potential (ORP) and pH time profiles for the nitrate knee point (NKP) and nitrogen break point (NBP) in anoxic and aerobic conditions with 100 and 99.6% performances, respectively. The duration of the anoxic and aerobic phases was also automated and noticeably lowered the concentration of nutrients in the manure in the slurry-pit, which served as a source of malodor. The real-time control strategy may be an innovative way to reduce odor and simultaneously produce liquid fertilizer, and provides a reference for the optimization of the industrial scale.

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Section: Resultsmentioning

confidence: 99%

Real-Time Control Technology for a Bio-Liquor Circulation System in a Swine Barn with Slurry Pit: Pilot Scale Study

Kim

Shim

Won

et al. 2022

Animals

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show abstract

Comprehensive analysis of microbial dynamics linked with the reduction of odorous compounds in a full-scale swine manure pit recharge system with recirculation of aerobically treated liquid fertilizer

Jang

Hwang

Jung

et al. 2021

Science of The Total Environment

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Effect of pH adjustment on the liquefaction process of anaerobic digestate and seed germination

Byeon

Lee

Ryoo

et al. 2021

Journal of Animal Environmental Science

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This study aimed to survey the chemical change and germination effect of anaerobic digestate after pH adjustment and aerobic treatment. The amount of ammonia (NH 3 ) in swine slurry anaerobic digestates (SS AD) of pH 7.0 and pH 6.5 were lower than that of un-adjusted anaerobic digestate. Especially, the anaerobic digestate with pH 6.5 had the lowest NH 3 generation. The amount of NH 4 -N has been gradually decreasing in the untreated anaerobic digestate, however, the anaerobic digestates with pH 7.0 and pH 6.5 showed no significant changes. In the germination tests with different methods, the germination index (GI) of anaerobic digestates with pH 7.0 and pH 6.5 was higher than that of un-adjusted anaerobic digestate. Thus, the pH adjustment will be useful to decrease the gas generation such as NH 3 , which causes the odor generated from anaerobic digestate.

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Effects of pH modulation on the concentrations of odorous compounds from pit slurry of a pig operation building

Cited by 6 publications

References 34 publications

Real-Time Control Technology for a Bio-Liquor Circulation System in a Swine Barn with Slurry Pit: Pilot Scale Study

Real-Time Control Technology for a Bio-Liquor Circulation System in a Swine Barn with Slurry Pit: Pilot Scale Study

Comprehensive analysis of microbial dynamics linked with the reduction of odorous compounds in a full-scale swine manure pit recharge system with recirculation of aerobically treated liquid fertilizer

Effect of pH adjustment on the liquefaction process of anaerobic digestate and seed germination

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