earticle

영어

In this paper, KNR process was applied to study the production of nitrogen-rich liquid fertilizer from supernatant of anaerobic digester treating livestock manure. The KNR process was run for 6 months from Run1 to Run8. During the operation period, the organic loading in the UMBR reactor of the KNR process was in the range of 1.2-7.5 kg CODCr/ m3·day and the ammonia nitrogen (NH4 +-N) loading was in the range of 0.21-1.33 kg NH4 +-N/m3·day. The average influent concentration of anaerobic digestion supernatant were pH 8.6, CODCr 13,487 mg/L, T-N 3,205 mg/L, NH4 +-N 2,427 mg/L, NO3 −-N 396 mg/L, T-P 297 mg/L. The average removal efficiency of CODCr, T-N, NH4 +-N, and T-P were 87.0%, 51.5%, 99.1% and 59.8%, respectively, and most of the organic matter and total nitrogen were removed from the UMBR reactor. During the operation period, the average residual ratio of NO3 −-N was 38.3% and 40.9% in the UMBR reactor and the nitrification tank, respectively. The NO3 −-N concentration in the effluent increased continuously to about 2,000 mg/L, and the accumulation rate increased to about 700%. Nitrate nitrogen-rich liquid fertilizer was produced from the anaerobic digestion supernatant of livestock manure. The constituent of the produced liquid fertilizer were 0.2% nitrogen, 0.019% phosphorus, and 0.23% potassium, and the high quality liquid fertilizer of 0.449% total was produced.

한국어

본 논문에서 KNR 공법을 적용하여 가축분뇨의 혐기성소화공정에서 발생되는 혐기성 소화액으로부터 고품질 액비 생 산에 대한 연구를 수행하였다. KNR 공정은 Run1에서부터 Run8까지 약 6개월 동안 운전되었다. 운전기간 동안 KNR 공 정의 UMBR 반응조에서 유기물 부하량은 1.2-7.5 kg CODCr/ m3·day 범위로, 암모니아성 질소(NH4 +-N) 부하량은 0.21- 1.33 kg NH4 +-N/m3·day 범위로 운전되었다. 운전기간 동안 가축분뇨 혐기성 소화액의 유입수 평균 수질은 pH 8.6, CODCr 13,487 mg/L, T-N 3,205 mg/L, NH4 +-N 2,427 mg/L, NO3 −-N 396 mg/L, T-P 297 mg/L이었다. CODCr, T-N, NH4 +-N, T-P 평균 제거효율은 각각 87.0%, 51.5%, 99.1%, 59.8%으로 나타났으며, 유기물질과 총질소의 대부분이 UMBR 반응조에서 제거되는 것으로 나타났다. 운전기간 동안 NO3 −-N 평균 잔류율은 UMBR 반응조와 질산화조에서 각각 38.3%, 40.9%로 나타났으며, 유출수의 NO3 −-N 농도는 지속적으로 증가하여 약 2,000 mg/L까지 축적되었으며, 축적률은 약 700%까지 증 가하였다. 축산분뇨 혐기성 소화액으로부터 질산성 질소 성분이 높은 액비가 생산되었으며, 액비의 구성 성분은 질소 0.2%, 인산 0.019%, 칼리 0.23%로서 합계 0.449%의 고품질 액비가 생산되었다.