표면 세척 시스템에 의한 유자의 미생물 및 잔류농약의 제거효과 Removal Efficiency of Microorganism and Pesticide Residues by a Using Surface Washing System on Yuja (Citrus junos Sieb ex Tanaka)원문보기
본 연구는 표면 세척 시스템을 이용하여 유자의 미생물과 잔류농약 제거 효과를 살펴보았다. 선행 연구로 오징어 먹물을 제거 효과를 보기 위해 스프레이 회전 속도 0.11, 0.42, 0.73 m/s, 수압 0.6, 0.9, 1.2 MPa과 컨베이어 속도 0.046, 0.092, 0.138 m/s 으로 세척 조건을 달리하였다. 오징어 먹물 제거 실험 결과 먹물 제거 효율은 컨베이어 속도와 분사 노즐 회전수와는 높은 상관관계를 나타내었으며 수압의 조건에서는 반응표면 분석 결과 0.9 MPa에서 가장 제거율이 높게 분석되었다. 이에 미생물과 잔류농약 제거률 실험의 위해 세척 조건으로 수압을 0.9 MPa로 고정하였으며 스프레이 회전 속도(0.11, 0.42, 0.73 m/s)와 컨베이어 속도(0.046, 0.092, 0.138 m/s)를 달리하여 수행하였다. 미생물은 컨베이어 속도 2.76 m/min 일 때 스프레이 회전속도 0.43과 0.73 m/s에서 각각 2.20, 2.05 log CFU/g 수준 감소하여 가장 높은 감소율을 나타내었다. 또한 스프레이 회전속도 0.11 m/s와 컨베이어 속도 0.138 m/min을 제외한 모든 처리구의 미생물 제거효과는 수도수 처리보다 높았다. 잔류농약 실험 결과 컨베이어 속도가 느릴수록, 분사노즐 회전수가 많을수록 제거효과가 높았으나 spirodichlofen, deltamethrin, benomyl, thiophanate-methyl과 acequinocyl 의 경우 컨베이어 속도 0.046 m/s에서 분사노즐 0.42 m/s이상에서 처리구들 간에 유의적인 차이를 보이지 않았다. Benomyl과 thiophanate-methyl 의 잔류 농약은 컨베이어 속도 0.092 m/s 이하의 조건에서 90% 이상 제거되었다. 이상의 결과에서 표면 세척 시스템의 조건을 컨베이어 속도 0.092 m/min 이하, 노즐 회전수 0.043 m/s 이상에서 세척 시 유자의 미생물과 잔류농약을 효율적으로 제거할 수 있을 것으로 판단된다.
본 연구는 표면 세척 시스템을 이용하여 유자의 미생물과 잔류농약 제거 효과를 살펴보았다. 선행 연구로 오징어 먹물을 제거 효과를 보기 위해 스프레이 회전 속도 0.11, 0.42, 0.73 m/s, 수압 0.6, 0.9, 1.2 MPa과 컨베이어 속도 0.046, 0.092, 0.138 m/s 으로 세척 조건을 달리하였다. 오징어 먹물 제거 실험 결과 먹물 제거 효율은 컨베이어 속도와 분사 노즐 회전수와는 높은 상관관계를 나타내었으며 수압의 조건에서는 반응표면 분석 결과 0.9 MPa에서 가장 제거율이 높게 분석되었다. 이에 미생물과 잔류농약 제거률 실험의 위해 세척 조건으로 수압을 0.9 MPa로 고정하였으며 스프레이 회전 속도(0.11, 0.42, 0.73 m/s)와 컨베이어 속도(0.046, 0.092, 0.138 m/s)를 달리하여 수행하였다. 미생물은 컨베이어 속도 2.76 m/min 일 때 스프레이 회전속도 0.43과 0.73 m/s에서 각각 2.20, 2.05 log CFU/g 수준 감소하여 가장 높은 감소율을 나타내었다. 또한 스프레이 회전속도 0.11 m/s와 컨베이어 속도 0.138 m/min을 제외한 모든 처리구의 미생물 제거효과는 수도수 처리보다 높았다. 잔류농약 실험 결과 컨베이어 속도가 느릴수록, 분사노즐 회전수가 많을수록 제거효과가 높았으나 spirodichlofen, deltamethrin, benomyl, thiophanate-methyl과 acequinocyl 의 경우 컨베이어 속도 0.046 m/s에서 분사노즐 0.42 m/s이상에서 처리구들 간에 유의적인 차이를 보이지 않았다. Benomyl과 thiophanate-methyl 의 잔류 농약은 컨베이어 속도 0.092 m/s 이하의 조건에서 90% 이상 제거되었다. 이상의 결과에서 표면 세척 시스템의 조건을 컨베이어 속도 0.092 m/min 이하, 노즐 회전수 0.043 m/s 이상에서 세척 시 유자의 미생물과 잔류농약을 효율적으로 제거할 수 있을 것으로 판단된다.
This study was conducted to assess the effects of the removal of pesticide residues and microorganisms from yuja (Citrus junos Sieb ex Tanaka) using a surface-washing system, under the following washing conditions: 0.11, 0.42, and 0.73 m/s spray rotation speeds; 0.6, 0.9, and 1.2 MPa water pressure ...
This study was conducted to assess the effects of the removal of pesticide residues and microorganisms from yuja (Citrus junos Sieb ex Tanaka) using a surface-washing system, under the following washing conditions: 0.11, 0.42, and 0.73 m/s spray rotation speeds; 0.6, 0.9, and 1.2 MPa water pressure and 0.046, 0.092, and 0.138 m/s conveying speeds. Tap-water treatment was used as the control. The washing efficiency when using squid ink was highly correlated with the conveying speed and the spray rotation speed. In addition, the highest washing efficiency was achieved when the water pressure was 0.9 MPa. The microorganisms were reduced to 0.40 log CFU/g for the tap-water treatment, and all the treatments, except those at the conveying speed of 0.138 m/s and the spray rotation speed of 0.11 rpm (6.07 log CFU/g), produced higher removal efficiencies compared with the tap-water treatment. Reductions of 2.20 and 2.05 log CFU/g were achieved at the spray rotation speeds of 0.42 and 0.73, respectively. The largest reductions were observed when the conveying speed was 0.046 m/s. Higher pesticide residue removal efficiency values were obtained at slower conveying speeds and higher spray rotation speeds. Higher than 50% removal efficiency was achieved when the spray rotation speed was 0.046 m/s for spirodichlofen, deltamethrin, benomyl, thiophanate-methyl, and acequinocyl. Especially, the removal efficiency for benomyl and thiophanate-methyl was more than 90%. It can thus be concluded that the pesticide residues in yuja can be effectively reduced by washing the latter with a less-than-0.092-m/s conveying speed and a higher-than-0.42-m/s spray rotation speed.
This study was conducted to assess the effects of the removal of pesticide residues and microorganisms from yuja (Citrus junos Sieb ex Tanaka) using a surface-washing system, under the following washing conditions: 0.11, 0.42, and 0.73 m/s spray rotation speeds; 0.6, 0.9, and 1.2 MPa water pressure and 0.046, 0.092, and 0.138 m/s conveying speeds. Tap-water treatment was used as the control. The washing efficiency when using squid ink was highly correlated with the conveying speed and the spray rotation speed. In addition, the highest washing efficiency was achieved when the water pressure was 0.9 MPa. The microorganisms were reduced to 0.40 log CFU/g for the tap-water treatment, and all the treatments, except those at the conveying speed of 0.138 m/s and the spray rotation speed of 0.11 rpm (6.07 log CFU/g), produced higher removal efficiencies compared with the tap-water treatment. Reductions of 2.20 and 2.05 log CFU/g were achieved at the spray rotation speeds of 0.42 and 0.73, respectively. The largest reductions were observed when the conveying speed was 0.046 m/s. Higher pesticide residue removal efficiency values were obtained at slower conveying speeds and higher spray rotation speeds. Higher than 50% removal efficiency was achieved when the spray rotation speed was 0.046 m/s for spirodichlofen, deltamethrin, benomyl, thiophanate-methyl, and acequinocyl. Especially, the removal efficiency for benomyl and thiophanate-methyl was more than 90%. It can thus be concluded that the pesticide residues in yuja can be effectively reduced by washing the latter with a less-than-0.092-m/s conveying speed and a higher-than-0.42-m/s spray rotation speed.
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문제 정의
This study examined the efficiency of removing pesticide residues and microbes using a surface washing system with the goal of developing a method to produce safe yuja. The removal efficiency of pesticide residues and microorganisms was analyzed under different processing conditions including varying the spray rotation speed, conveying speed and water pressure.
본 연구는 표면 세척 시스템을 이용하여 유자의 미생물과 잔류농약 제거 효과를 살펴보았다. 선행 연구로 오징어 먹물을 제거 효과를 보기 위해 스프레이 회전 속도 0.
제안 방법
The first experiment was conducted to assess washing efficiency at water pressures of 0.6, 0.9, 1.2 MPa, spray rotation speeds of 0.11, 0.42, 0.73 m/s and conveyor belt speeds of 0.046, 0.092, 0.138 m/s. Tap water treatment was used as the control.
The second set of experiments was performed to evaluate the removal efficiency of pesticide residues and microorganism.
The second set of experiments was performed to evaluate the removal efficiency of pesticide residues and microorganism. These experiments were conducted at a conveying speed of 0.046, 0.092, and 0.138 m/s, a spray rotation speed of 0.11, 0.42, 0.73 and water pressure of 0.9 MPa, which was selected based on washing efficiency experiment and described above (Table 1).
9 MPa에서 가장 제거 율이 높게 분석되었다. 이에 미생물과 잔류농약 제거률 실험의 위해 세척 조건으로 수압을 0.9 MPa로 고정하였으며 스프레이 회전 속도(0.11, 0.42, 0.73 m/s)와 컨베이어 속도 (0.046, 0.092, 0.138 m/s)를 달리하여 수행하였다. 미생물은 컨베이어 속도 2.
대상 데이터
The yuja that was purchased and used in the experiment was harvested in Goheung, Jeolla, Republic of Korea in November 2009. E.
이론/모형
The analysis of pesticide residue followed the method of the Official Analytical Method of Pesticides (23).
성능/효과
05). A reduction of more than 65% was observed after tap water washing for benomyl and thiophanate-methyl and significantly higher reduction (95.52-99.47%) were observed when the washing system was used under all conditions tested compared with tap water washing (Fig. 5-(e), (f)).
63%);however, this difference was not significant. The pesticide residue was reduced to 61.31% when the conveying speed was 0.046 m/s and the spray rotation speed was 0.73 m/s, which was not significantly difference from when the spray rotation speed was 0.92 m/s (62.87%) (Fig. 5-(a)).
05 log CFU/g 수준 감소하여 가장 높은 감소율을 나타내었다. 또한 스프레이 회전속도 0.11m/s와 컨베이어 속도 0.138 m/min을 제외한 모든 처리구의 미생물 제거효과는 수도수 처리보다 높았다. 잔류농약 실험 결과 컨베이어 속도가 느릴수록, 분사노즐 회전수가 많을수록 제거효과가 높았으나 spirodichlofen, deltamethrin, benomyl, thiophanate-methyl과 acequinocyl 의 경우 컨베이어 속도 0.
138 m/s 으로 세척 조건을 달리하였다. 오징어 먹물 제거 실험 결과 먹물 제거 효율은 컨베이어 속도와 분사 노즐 회전수와는 높은 상관관계를 나타내었으며 수압의 조건에서는 반응표면 분석 결과 0.9 MPa에서 가장 제거 율이 높게 분석되었다. 이에 미생물과 잔류농약 제거률 실험의 위해 세척 조건으로 수압을 0.
092 m/s이하의 조건에서 90% 이상 제거되었다. 이상의 결과에서 표면 세척 시스템의 조건을 컨베이어 속도 0.092 m/min 이하, 노즐 회전수 0.043 m/s 이상에서 세척 시 유자의 미생물과 잔류농약을 효율적으로 제거할 수 있을 것으로 판단된다.
138 m/min을 제외한 모든 처리구의 미생물 제거효과는 수도수 처리보다 높았다. 잔류농약 실험 결과 컨베이어 속도가 느릴수록, 분사노즐 회전수가 많을수록 제거효과가 높았으나 spirodichlofen, deltamethrin, benomyl, thiophanate-methyl과 acequinocyl 의 경우 컨베이어 속도 0.046 m/s에서 분사노즐 0.42 m/s이상에서 처리구들 간에 유의적인 차이를 보이지 않았다. Benomyl과 thiophanate-methyl 의 잔류 농약은 컨베이어 속도 0.
후속연구
Especially it easily removed pesticides with s=p and p=o double bonds such as chlorpyrifos, prothiofos, spirodichlofen, deltamethrin. Therefore, it is considered that the combined washing with chemical washing solution and washing system needs further research.
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