898
The UASB reactors treated a VFA mixture ( with an acetate : propionate : butyrate ratio of 5 : 3 : 2 on COD basis ) or acetate as the sole substrate at different COD : sulfate ratios .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None