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Table 1 Total solid composition of the digesters sludge and feed sludge

From: Microbial effects of part-stream low-frequency ultrasonic pretreatment on sludge anaerobic digestion as revealed by high-throughput sequencing-based metagenomics and metatranscriptomics

 

Control (M1, M2)

M3

M4

TS composition of the digester

 Fraction of LFUS-pretreated TSAS in the digester sludge

0%

6%

9%

 TPS (g/l) of the digester:

478

478

478

 TSAS (g/l) without LFUS pretreatment

522

459

430

 LFUS-pretreated TSAS (g/l)

0

63

92

TS composition of the feed sludge

 Fraction of LFUS-pretreated TSAS in feed sludge

0%

23%

33%

 TSAS (g/l) without LFUS pretreatment

278

215

186

 LFUS-pretreated TSAS (g/l)

0

63

92

  1. TS total solid, TSAS thickened secondary activated sludge, TPS thickened primary sludge, LFUS low-frequency ultrasound