• Title/Summary/Keyword: Swine wastewater

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Feasibility of Co-Digestion of Sewage Sludge, Swine Waste, and Food Waste Leachate (하수슬러지, 돈분뇨, 음식물쓰레기 탈리액 병합소화 타당성 평가)

  • Kim, Sang-Hyoun;Ju, Hyun-Jun
    • Journal of the Korea Organic Resources Recycling Association
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    • v.20 no.1
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    • pp.61-70
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    • 2012
  • Feasibility of co-digestion was investigated by a series of anaerobic batch experiments using sewage sludge, swine waste, and food waste leachate as substrates. The organic solid wastes were collected from M city, where the daily productions of sewage sludge, swine waste, and food waste leachate were 178 ton/d, 150 ton/d, and 8 ton/d, respectively. Both swine waste and food waste leachate showed superior methane yields, methane productivities, and organic pollutant removal efficiencies compared to sewage sludge. Co-digestion of the total amounts of organic solid wastes would enhance methane production by 5.60 times $(530\;m^{3}\;CH_{4}/d\;{\rightarrow}\;2,968\;m^{3}\;CH_{4}/d)$. However, it also increase the amount of digestate by 1.88 times with 3.79 to 4.92 times higher pollutants (chemical oxygen demands total nitrogen, and total phosphorus) loading rates. Co-digestion of organic solid wastes is a valid strategy to enhance the performance of an anaerobic sludge digester and the energy independence of a wastewater treatment plant. Anyhow,the increment of digestate with higher pollutant loading would need a careful counterplan in the operation of the main stream of the treatment plant.

Phosphorus and Nitrogen Reduction from Animal Wastewater with MAP Process (축산폐수에서 질소$\cdot$인의 추출을 위한 MAP공정 개발)

  • Oh I. H.;Lee J. H.;Jeung D. S.;Jo J. W.
    • Journal of Animal Environmental Science
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    • v.11 no.3
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    • pp.207-214
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    • 2005
  • To reduce phosphorus and nitrogen from the swine wastewater, magnesium chloride $(MgCl_2)$ was used as a reaction material for both soluble phosphorus (SP) and ammonia-nitrogen (AN). The initial value of SP content were $471mg/\ell$ far aeration test and $515 mg/\ell$ for NaOH addition test, but treatment of $MgCl_2$ reduced SP value to $5mg/\ell$ and $4mg/\ell$. The removal efficiency of $MgCl_2$ for SP showed $99\%$ in both treatment, and the removal efficiency of $MgCl_2$ for AN showed $15\%$ with treatment of aeration and $18\%$ with NaOH. All the experiments were done in a low temperature of 6 to $8^{\circ}C$, suggesting that this methods are possibly able to apply to a cold weather conditions. Moreover, the struvite crystal structure was identified by electronic microscope, implying that $MgCl_2$ is an effective material for removal of SP from swine wastewater In addition to the increased removal rate of the AN in wastewater, both $MgCl_2$ and $KH_2PO_4$ were added. The SP value was reduced by $99\%$ with 2g addition of the phosphate. The SP removal rate by 4g addition of the phosphate was increased only as $15-19\%$, but the quantity of removed SP was higher than that of 2g addition test. The value of AN was not reduced as expected by adding $KH_2PO_4$. The AN removal rate were low as $18\%$ and $15\%$ like as the level of the former test with $MgCl_2$ alone. Therefore, it is needed to examine closely the reaction mechanism f3r reducing both SP and AN simultaneously.

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High Strength Slaughter Wastewater Treatment in a Novel Combined System of Hybrid-Rotating Biological Contactor and Biological Aerated Filter (Hybrid-RBC와 BAF의 조합공정을 이용한 고농도 도축폐수의 처리 특성)

  • Jung, Chan-Il;Ahn, Jo-Hwan;Bae, Woo-Keun;Kim, Seung-Jin
    • Journal of Korean Society of Environmental Engineers
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    • v.33 no.2
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    • pp.77-84
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    • 2011
  • This study was conducted to develop a novel combined system of a hybrid rotating biological contactor (RBC) process that was composed of an attached- and suspended- biomass reactor, followed by a settler and a biological aerated filter (BAF) column to treat a high strength slaughter wastewater. Long term influences of organic and nitrogen loading rates were investigated to see how the combined system worked in terms of the removal efficiency. A synthetic wastewater containing a pork cutlet steak source (commercially available) and swine blood was used to feed the combined system. The hybrid RBC process showed excellent removals: about 95% for soluble COD and 85% for ammonium nitrogen. However, the unsettled solids seriously deteriorated the removal efficiency of total COD (TCOD) and total nitrogen (TN) in the RBC process. A significant fraction of the TCOD and suspended solids (SS) was further removed in the BAF column although the effluent quality was still unsatisfactory, giving TCOD 300 mg/L, SS 180 mg/L and TN 59 mg/L. An addition of polyaluminium chloride into the RBC effluent improved the performance of the settler and BAF, producing an excellent quality of final effluent; TCOD 16.5 mg/L, SS 0 mg/L, TN 55.5 mg/L, TP 1.3 mg/L. Therefore, it was confirmed that the combined system of hybrid RBC and BAF could treat a high strength slaughter wastewater excellently.

Advanced Swine Wastewater Treatment with using Membrane Bioreator(A/O) and Nanofiltration (MBR(Membrane Bioreactor: A/O)공정과 나노여과를 이용한 축산폐수 고도처리)

  • 장경국;배태현;김은영;장하원;탁태문
    • Proceedings of the Membrane Society of Korea Conference
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    • 2004.05b
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    • pp.115-118
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    • 2004
  • 축산폐수에 대한 방류수 수질기준 항목에 COD의 추가 및 질소와 인의 기준이 강화(1999년)됨에 따라 많은 축산폐수처리시설의 보강과 새로운 기술도입이 요구되고 있다. 따라서 대부분의 공공처리시설에서는 질소 및 인을 제거하기 위하여 2차 처리단계에서 무산소조(탈질조)와 호기성(포기조)를 연계한 생물학적 질소제거를 실시하고, 최종처리단계에서 응집제 투입에 의한 응집ㆍ침전공정후 모래여과 또는 활성탄 흡착공정에 의한 인과 색도제거 하는 등, 생물학적 처리 및 물리ㆍ 화학적 처리시설이 추가적으로 보완ㆍ적용단계에 있다.(중략)

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Effect of Straw Used as a Medium of Trickling Filter with Livestock Wastewater on the Growth of Bunching Lettuce(Lactuca sativa L., var. crispa) and Soil Chemical Properties (축산폐수(畜産廢水) 살수여상충전재(撒水濾床充塡材)로 사용(使用)된 짚이 상추(Lactuca sativa L., var. crispa)와 토양화학성(土壤化學性)에 미치는 영향(影響))

  • Kim, Jeong-Je;Yang, Jae-E;Shin, Young-Oh
    • Korean Journal of Soil Science and Fertilizer
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    • v.29 no.4
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    • pp.371-377
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    • 1996
  • Utilization of crop residues was investigated in search of ecologically desirable treatment of wastewater from small-scale swine farm. Instead of common materials rice stray was used as a support medium of tricking filter with the farm, wastewater treatment. The treated rice stave medium was dried, crushed, and directly added to soil, where bunching lettuce seedlings were grown under greenhouse conditions. The development of bunching lettuce was significantly enhanced by the application of the straw medium up to 2100 kg/10a. Little changes in soil chemical properties were observed at harvesttime, except the pH which was raised by more than 1 unit, and the content of Mg which was depleted presumably by the uptake of the plant.

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A Study on Characteristics of Aerobic Liquid-Composting using a Micro Air Diffusion and a Mixer System (미세기포와 교반을 이용한 호기성 액비특성에 관한 연구)

  • Gu, Bon-Woo;Oh, Dae-Min;Lee, Young-Shin
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.4
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    • pp.1354-1360
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    • 2010
  • The purpose of this study is to analyze the behavior of swine slurry wastewater from bogen, in the treatment of Aerobic Liquid-Composting treatment by Aerobic Liquid-Composting using a mixer and Micro Air Diffusion pH level was at the beginning and its rise was seemingly related to VFA. It appears that removal of BOD and COD are more effective by Aerobic than by Anaerobic. In terms of removal efficiency, it shows 70.9% of BOD and 39% of COD in M.A+Mix and 67.8% of BOD and 19% of COD in M.A. $NH_3-N$ decreases in all conditions, which is caused by both the characteristic of nitrogen and the rise of pH. $NO_3-N$ increases in all conditions. It is judged that the accumulation of $NO_3-N$ affects the reduction of the ratio of denitrification. In the result of the analysis of Manure in swine slurry of liquified fertilizer ingredients, content of Manure in swine slurry of liquified fertilizer ingredients in aerobic conditions (M.A+Mix) is higher than anaerobic conditions.

Investigation on Characteristics of Swine Manure of Optimum Volume for Escalator Reversing Composting Facility (돼지분뇨 특성에 따른 기계교반 퇴비화시설의 적정용적 산정 연구)

  • Kwag, J.H.;Choi, D.Y.;Park, C.H.;Jeong, K.H.;Kim, J.H.;Yoo, Y.H.;Youn, C.K.;Ra, C.S.
    • Journal of Animal Environmental Science
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    • v.14 no.2
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    • pp.105-112
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    • 2008
  • This study was carried out to investigate evaporation rate of moisture per surface area and degradation rate of organic matter in full scale escalator reversing composting facility were analyzed to develope a computer program for the computation of an optimum volume of composting facility according to handling methods of swine farm, moisture levels of manure, degradation rate of organics and evaporation rate of moisture during composting. The obtained results can be followed as bellow; The temperature in full scale escalator reversing composting facility during composting reached $70^{\circ}C$ in 4 days and maintained until 11 days. Reduction rate of moisture and density was average 1.20% and 29.7%, respectively. Annual degradation rate of organic matter was 3.53%, showing lowest rate in winter as 3.23%. These seasonal degradation rate could be a factor to be considered for proper management and installation of composting facility. When computed with the amount of feces, urine, slurry and manure plus wastewater produced, the optimum volumes of composting facility for slurry and manure plus wastewater including each 95% moisture was $229m^3$ and $277m^3$, respectively, showing 21% ($48m^3$) difference.

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Removal Characteristics of Nitrogen and Phosphorus in swine wastewater by Using Acetic acid on the SBR Process (SBR에서 아세트산을 이용한 양돈폐수의 질소·인 제거 특성)

  • Huh, Mock;Kang, Jin-Young
    • Journal of the Korea Organic Resources Recycling Association
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    • v.12 no.1
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    • pp.84-93
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    • 2004
  • This study was performed : 1) to find the suitable HRT(hydralic retention time), 2) to evaluate the effects of the ratio of mixing/aeration time and injection time of external carbon source, for the removal of organics, nitrogen and phosphorus in swine wastewater by SBR(sequencing batch reactor process), which is one of the biological treatment process. The result of this study were summarized as follows : (1) As the ratio of mixing/aeration time was higher, $NH_4{^+}-N$ removal efficiency was increased and it was increased with increasing injection time of external carbon source because nitrification was affected by denitrification microbes propagation when injection time of external carbon soruce was shorted. T-N removal efficiency was increased with increasing the ratio of mixing/aeration time and injection time of external carbon source. (2) The T-P removal efficiency showed a great difference in each operating condition, and it was increased with increasing the ratio of mixing/aeration time increased and when the injection time of external carbon source was shorted because denitrification was done with effect by denitrification microbes propagation. (3) The highest removal efficiency of organic and nitrogen were obtained by the operating condition of Run 4-1(the ratio of mixing/aeration time : 16.5/5.5, injection time of external carbon source : 15hours) and T-P were obtained by the operation condition of Run 4-2(the ratio of mixing/aeration time : 16.5/5.5, injection time of external carbon source : 3hours), and efficiency(effluent concentration)of $BOD_5$, $COD_{Mn}$, $COD_{Cr}$, T-N and T-P in the treated water was 96.1%, 87.7%, 90.6%, 86.6% and 84.5%, respectively.

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Effects of Seed Sources and Concentration of Ammonia on Anaerobic Digestion (혐기성 소화에 대한 식종원 및 암모니아 농도의 영향)

  • Kim, Yang-Ji;Kim, Sung-Il;Shin, Bum-Shic;Ahn, Ki-Sup;Kim, Jong-Soo
    • Korean Journal of Environmental Agriculture
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    • v.23 no.1
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    • pp.1-6
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    • 2004
  • The seeding sources and concentration of ammonia on anaerobic digestion were investigated by batch culture bioreactors. The sources of seeding on anaerobic digestion were from swine wastewater collection pit of a hog raising farm and from anaerobic digestion sludge of a municipal sewage treatment plant. The inhibition of ammonia on anaerobic microorganisms was initiated at ammonia concentration of $1,500\;mgNH_4-N/L$ and it's effect was increased by increased by increasing ammonia concentration up to $3,500\;mgNH_4-N/L$ regardless the sources of seeding as evidenced by decreases in COD removal efficiencies and biogas yields. The inhibition occurred to not only methanogens but also acidogens since the concentration of volatile fatty acids was maintained at 50 mg/L The COD removal efficiency and biogas yield were Maintained constantly while increasing ammonia concentration up to $3,500\;mgNH_4-N/L$ when swine wastewater collection pit was used as a seeding; however, those were decreased while increasing ammonia concentration when anaerobic digestion sludge was used as a seeding. The results indicate that the seeding acclimated to high concentrations of ammonia for long time was easy in adaptation to high ammonia concentration and less subjective to ammonia inhibitory effects.

Effect of HRT and Internal Recycle Ratio on Removal of Organic and Nitrogen in Swine Wastewater by Anoxic-Oxic Process Combined with Membrane (분리막이 결합된 무산소·호기 공정을 이용한 축산폐수처리에서 수리학적체류시간 및 내부반송율이 유기물 및 질소제거에 미치는 영향)

  • Whang, gye dae;Lee, bong hee;Lee, hyun duk
    • Journal of Korean Society on Water Environment
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    • v.20 no.6
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    • pp.603-609
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    • 2004
  • The objective of this study was to determine the optimal operation conditions in an anoxic oxic process to eliminate both organic and nitrogen matters in swine wastewater. For the purpose of this, the removal efficiency was evaluated with various HRTs and internal recycling ratio. During the whole 580 days of experiment, HRTs had been gradually decreased in an order of 20, 14, 12 and l0days, and the internal recycle ratio was kept at 20Q. So as to determine the effect of the internal recycle ratio on the nitrogen removal, the internal recycle ratio had been gradually increased from 20Q to 50Q while HRT was maintained at 12days. As a result, it was shown that the removal efficiency of organic matter was above 95% regardless of changing of HRTs. The average influent concentration of TCODcr and SCODcr were 24,854 mg/L and 18,920 mg/L, respectively. Average removal efficiency of TKN was shown to be nearly 98% when HRT was kept at 12days; however, the $NH_4{^+}-N$ concentration of effluent was shown to be increased when the loading rate of $NH_4{^+}-N$ was increased to $0.602 kgNH_4{^+}-N/m^3$-day by means of decreasing HRT to 10days. It was concluded that nitrogen loading rates should be more considered rather than organic loading rates in case of determining an optimal HRT. When gradually increasing the internal recycle ratio from 20Q to 50Q, the removal efficiency of organic matters and TKN were 96% and 98%, respectively so that no significant changes in removal efficiency was detected. However, when the internal recycle ratio was kept at 50Q, it was revealed that the $NO_3-N$ concentration of effluent seemed to drop and the average $NO_3-N$ concentration of effluent was around 52 mg/L.