9640
A high reactor pH ( + / - 8 ) , a short solid retention time ( < 150 days ) , and the presence of a substantial SRB population in the inoculum may considerably reduce the time required for acetate - utilising SRB to outcompete MB .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 None