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首页> 外文会议>Annual International Meeting of the American Society of Agricultural and Biological Engineers >Free chlorine loss during spray of membrane-less acidic electrolyzed water (MLAEW) and its antimicrobial effect on airborne bacteria from poultry house
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Free chlorine loss during spray of membrane-less acidic electrolyzed water (MLAEW) and its antimicrobial effect on airborne bacteria from poultry house

机译：膜较低的酸性电解水（MLAEW）喷雾期间的自由氯损失及其对家禽群体空气菌的抗微生物作用

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Spray-application of membrane-less acidic electrolyzed water (MLAEW) is a novel technique for disinfection in livestock houses. This study investigated the loss of free chlorine (FC, the major germicidal component in MLAEW) over distance during spray,as affected by air temperature and initial FC concentration. The antimicrobial effect of MLAEW on airborne bacteria from an aviary laying-hen house was examined. MLAEW was prepared with two FC concentrations (app. 15 and 60 mg L~1), and was sprayed at three air temperatures (18, 25, 32°C). The original MLAEW solution and MLAEW aerosols collected at 0, 25, and 50 cm from the spray nozzle were analyzed for FC concentrations. Bacteria were immersed into these MLAEW samples and numerated for viable countafter 0.5-, 2-, and 5-min treatments. MLAEW aerosols collected at 0 cm lost 11.7 - 13.2% FC as compared to the original MLAEW solution. This initial loss was affected neither by the initial FC concentration (P = 0.13) nor by air temperature (P = 0.57). The rate of FC loss during travelling was 0.79 - 0.87 % per centimeter of aerosol travel distance (% cm~(-1)) at 18°C, 1.08 -1.15% cm~(-1) at 25°C, and 1.35 - 1.49 % cm'1 at 32°C. This travelling loss was affected by air temperature (P = 0.02), but notby initial FC concentration (P = 0.38). Bacteria were completely inactivated in 0.5 min when treated with MLAEW samples with FC > 16.8 mg L~(-1), in 2 min when FC > 13.8 mg L~(-1), and in 5 min when FC > 7.2 mg L~(-1). Airborne bacteria from aviary henhouse can be effectively inactivated by MLAEW with adequate FC concentration and contact time. During spray, antimicrobial efficacy of MLAEW aerosols decreased over distance due to FC loss which exacerbates at higher air temperature.
机译：喷涂膜 - 较低酸性电解水（MLAEW）是一种新型用于牲畜容器中的消毒技术。本研究调查了在喷雾期间的距离在喷雾期间的游离氯（Fc，MLAew中的主要杀菌组分）的丧失，其受空气温度和初始Fc浓度的影响。研究了MLAew对来自禽流床房屋空气中细菌的抗微生物效应。用两种Fc浓度（APP.15和60mg L〜1）制备MLAew，并在三个空气温度（18,25,32℃）下喷涂。分析了在0,25和50cm的原始MLAew溶液和MLAew气溶胶距喷嘴的Fc浓度。将细菌浸入这些MLAew样品中，并为可行的替代含量0.5-，2-和5分钟进行数值。与原始MLAew溶液相比，MLAew气溶胶损失11.7-13.2％FC。这种初始损失既不受初始FC浓度（P = 0.13）也不受气温（P = 0.57）。行驶期间的Fc损耗率为0.79-0厘米的气溶胶行程距离（％cm〜（-1）），在18℃，1.08-1.15％cm〜（-1），在25°C，1.35 - 在32°C时1.49％cm'1。该行程损失受到空气温度的影响（P = 0.02），但初始FC浓度（P = 0.38）。当用Fc> 16.8mg L〜（1）的MLAEK样品处理时，细菌在0.5分钟内灭活。在2分钟内，当FC> 13.8mg L〜（-1），在5分钟时，在FC> 7.2mg L〜 （-1）。来自禽流屋的空气中细菌可以通过MLAew有效地灭活，具有足够的Fc浓度和接触时间。在喷雾期间，MLAew气溶胶的抗微生物功效由于FC损耗而在较高的空气温度下加剧。

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