کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5767669 1413202 2017 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-amperage pulsating direct current has a bactericidal effect on marine fish pathogens in circulating seawater
ترجمه فارسی عنوان
جریان مستقیم پالس شده با شدت کم اثر تاثیر ضد باکتریایی بر پاتوژن های ماهی دریایی در آب دریا دارد
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
چکیده انگلیسی


- Low-amperage PC inactivated marine fish pathogens in circulating seawater.
- The bactericidal effect was directly correlated with ACS level and treatment time.
- The ACS level generated by low-amperage PC was safe for humans and marine animals.
- A very low ACS level (<0.1 mg/L) was sufficient for complete disinfection.
- Pulsation of electric current and ORP did not contribute to bactericidal effect.

The bactericidal effect of pulsating direct current (PC) generated at a very low amperage (0.01 A) with a frequency of 5 Hz or 14 kHz against two marine fish pathogens, Edwardsiella tarda and Vibrio parahaemolyticus, in circulating seawater at 15 and 25 °C in comparison with the effect of direct current (DC) of the same amperage was investigated. The bactericidal effect was directly correlated with the generation of active chlorine species (ACS) and the treatment duration. PC treatment at 14 kHz resulted in complete bacterial inactivation when the ACS level reached 0.11-0.12 mg/L after 45-60 min of treatment. PC treatment at 5 Hz required generation of only 0.03-0.07 mg/L ACS to achieve complete bacterial inactivation, although a slightly longer treatment duration (60-90 min) was needed. DC treatment resulted in complete disinfection within a shorter time (30 min) due to greater ACS production. The bactericidal effect and ACS generation were weaker at the higher temperature (25 °C) due to more rapid evaporation of Cl2 gas. The pH of the seawater maintained at ∼8.0. A disinfection study in circulating non-chloride Na2SO4 solution at pH 8.0 showed that the electric pulsation did not have notable bactericidal effect up to 14 kHz at 0.2 A.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Control - Volume 73, Part B, March 2017, Pages 497-502
نویسندگان
, , , , ,