Kassa F., Yilma Z., Assefa G., Bekele T., Gojam Y., Nebiyu R., Kassa B.
Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia
Kassa, F., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Yilma, Z., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Assefa, G., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Bekele, T., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Gojam, Y., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Nebiyu, R., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia; Kassa, B., Ethiopian Institute of Agricultural Research, Holetta Agricultural Research Center, P. O. Box 2003, Addis Ababa, Ethiopia
Lactoperoxidase system (LPs) was evaluated at different storage temperature conditions as raw cows' milk preservative at Holetta Agricultural Research Center (On - Station) and at milk collection centers at Degem and Girar Jarso districts of Selale area (On - farm). The milk collected from research center and collection centers was either treated with LPs or untreated (control). For the on - Station trail, both LPs treated and untreated milk was kept at room temperature, in cold water, in incubator adjusted at 30°C and in refrigerator adjusted at 10°C. For the on - Farm trial LPs treated and untreated milk was kept at room temperature and in cold water. Alcohol and clot - On - Boiling tests were employed to detect milk deterioration. LPs treatment has resulted in increased milk shelf life. Its effect for both on - Station and on - Farm trials tended to be more efficient as storage temperature decreases. LPs treatment has extended milk shelf life by 6, 7.5, 12.5 and 74 hours, under storage temperature conditions of incubator (30°C), room temperature (22.5oC), cold water (20.0°C), and refrigerator (10oC) respectively as compared to LPs untreated milk. The results of on - station and on - farm trails showed that alcohol test detected milk deterioration earlier than clot - on - boiling test for both LPs treated and untreated milk samples. LPs can be applied to extend the shelf life of milk. This may possibly bring multiple advantages for smallholder dairy farmers in order to keep evening milk overnight without cooling facilities and to deliver it in the following morning at the collection centers.
