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Effects of biomass pyrolysis derived wood vinegar (WVG) on extracellular polymeric substances and performances of activated sludge.

Abstract：

:The effects of wood vinegar (WVG) on extracellular polymeric substances (EPS), and flocculation, sedimentation and dewatering performances of activated sludge were investigated in sequencing batch reactor (SBR) process. Results showed that polysaccharide (PS) and DNA were accounted for the largest and smallest proportion of EPS, respectively. With WVG injection, productions of soluble EPS (S-EPS), loosely bound EPS (LB-EPS), tightly bound EPS (TB-EPS), protein (PN), PS, and DNA were significantly increased. The optimal WVG concentration was found as 4 μl/l. The effects of WVG on different types of EPS followed an order of LB-EPS > TB-EPS > S-EPS. According to batch and long-term SBR operations, WVG could increase the biomass amount of activated sludge, which was beneficial to improve sewage treatment efficiencies. However, WVG showed negative impact on flocculation, sedimentation, and dewatering performance of activated sludge.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Zhang F,Yang H,Guo D,Zhang S,Chen H,Shao J

doi

10.1016/j.biortech.2018.11.064

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

25-32

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)31597-9

journal_volume

274

pub_type

杂志文章

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