다른 종류의 소금들로 제조한 새우 젓갈의 특성

Properties of Saeu Jeotgal (Shrimp Jeotgal) Prepared with Different Types of Salts

정제염(PS), 1년 숙성천일염(SS), 3회 죽염(BS)들을 사용하여 새우젓갈들을 제조하였다(소금농도 25%). 젓갈들은 22주간 $15^{\circ}C$에서 숙성하였다. 바실라이들과 해양세균들은 6주차 이후 검출되었고 고세균들은 천일염 젓갈에서만 처음 8주간 저농도로 관찰되었다. 죽염젓갈은 타 젓갈들 보다 pH는 높고 적정산도는 낮았다. 아미노태질소는 발효 중 증가했고 특히 2주와 6주 이후 증가정도가 컸으며 천일염젓갈이 발효초기부터 종료시 까지 타 젓갈들보다 함량이 높았다. 암모니아태 질소함량도 발효 중 증가했다. 천일염젓갈이 가장 높은 휘발성염기질소 함량을 나타내었다. 염도는 4주차 이후 일정하게 유지되었다. 시료의 단백질가수분해 측면에서 볼 때 천일염이 타 염들보다 우수하였다.

Saeu (shrimp) jeotgal (SJ) was prepared by mixing with 25% salt with different types: purified salt (PS), solar salt aged for 1 year (SS), and bamboo salt. SJ was fermented for 22 weeks at $15^{\circ}C$. Bacilli and marine bacteria were detected throughout the entire fermentation period, and marine bacteria were present in the largest numbers. Lactic acid bacteria (LAB) were detected only during the first 8-10 weeks, but yeasts appeared at the sixth week and later. Archaea were detected in low numbers only from SS-SJ during the first 8 weeks. BS- SJ showed higher pH and lower titratable acidity (TA) values than other SJs because of strong alkalinity of bamboo salt. Amino-type nitrogen (ANN) contents of SJs increased during fermentation, especially, after 2 and 6 weeks. SS-SJ showed the highest ANN content from the beginning to the end of fermentation. Ammonia-type nitrogen (AMN) contents also increased like the amino-type nitrogen during fermentation. The highest volatile basic nitrogen (VBN) was also observed in SS-SJ. Salinity was kept constant after 4 weeks. SS was better than other salts for SJ fermentation in terms of protein hydrolysis.