2) Protein recovery by microfiltration and ultrafiltration
① Soluble and insoluble protein
1. Two different components in processing wastewater : insoluble particulates and soluble proteins
2. Insoluble particulates can be recovered by a rotary screen(100㎛), microfiltration(MF) with
combined screen size of 50 ㎛ and 30 ㎛
3. The solids in the MF-recovered protein were 16.3%
- microfiltration was not enough to recover soluble proteins lost in the waste streams
4. Moisture content of MF-filtered wastewater to the minimal level of 91-3% using UF with a membrane of
30,000 MWCO
5. Proteins concentrated by UF had considerably darker colors and a strong odor
6. UF concentrate could only be used in high-protein animal feeds
7. Aerobic plate counts (APC) were relatively high in the first discharged water.
- The increased APC in W7 and W8 were probably due to washing of the microbial load from the meat
into the waste stream as a results of elevated pressures
8. The extensive washing of minced flesh caused a high loss of organic substances, which results in
high COD(6000-27,000mg/L) in waste
9. By applying UF with 30,000 MWCO, an 89-94% reduction in COD value was achieved
2) Protein recovery by microfiltration and ultrafiltration ① Soluble and insoluble protein 1. Two different components in processing wastewater : insoluble particulates and soluble proteins 2. Insoluble particulates can be recovered by a rotary screen(100㎛), microfiltration(MF) with combined screen size of 50 ㎛ and 30 ㎛ 3. The solids in the MF-recovered protein were 16.3% - microfiltration was not enough to recover soluble proteins lost in the waste streams 4. Moisture content of MF-filtered wastewater to the minimal level of 91-3% using UF with a membrane of 30,000 MWCO 5. Proteins concentrated by UF had considerably darker colors and a strong odor 6. UF concentrate could only be used in high-protein animal feeds 7. Aerobic plate counts (APC) were relatively high in the first discharged water. - The increased APC in W7 and W8 were probably due to washing of the microbial load from the meat into the waste stream as a results of elevated pressures 8. The extensive washing of minced flesh caused a high loss of organic substances, which results in high COD(6000-27,000mg/L) in waste 9. By applying UF with 30,000 MWCO, an 89-94% reduction in COD value was achieved
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