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Author:

Jin, Baodan (Jin, Baodan.) | Wang, Shuying (Wang, Shuying.) (Scholars:王淑莹) | Xing, Liqun (Xing, Liqun.) | Li, Baikun (Li, Baikun.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars:彭永臻)

Indexed by:

Scopus SCIE

Abstract:

Carbon source shortage and waste sludge treatment are two problems facing sewage treatment plants. The purpose of this work was to investigate the feasibility of using salt (NaCl) to enhance the production of short-chain fatty acids (SCFAs) from waste sludge, reduce sludge production, and lower the operating cost. Four sodium chloride (NaCl) concentrations (0, 2, 15, and 25 g/L) and temperatures (20, 30, 35, and 40 degrees C) were examined individually in batch-mode sludge fermentation systems. The results showed that NaCl promoted the release of soluble proteins and polysaccharides, enhanced hydrolysis acidification and SCFAs accumulation, suppressed the activity of coenzyme 420 and the growth of methanogens. The optimal condition of hydrolysis acidification was 15 g/L NaCl and 35 degrees C, and the acidification was deteriorated at 25 g/L NaCl and 40 degrees C. Compared with the blank test (0 g/L NaCl), the sludge reduction and SCFAs production increased by 22.12 and 21.21%, respectively. With regard to the alkali consumption per unit (1 mmol), the SCFAs production and sludge reduction was increased by 9.6 and 21.99%.

Keyword:

Hydrolytic acidification Sodium chloride (NaCl) Methanogens Waste activated sludge Short volatile fatty acids (SCFAs)

Author Community:

  • [ 1 ] [Jin, Baodan]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Shuying]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 3 ] [Xing, Liqun]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Baikun]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China
  • [ 5 ] [Peng, Yongzhen]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 王淑莹

    [Wang, Shuying]Beijing Univ Technol, Engn Res Ctr Beijing, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100124, Peoples R China

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Source :

CLEAN-SOIL AIR WATER

ISSN: 1863-0650

Year: 2016

Issue: 12

Volume: 44

Page: 1750-1758

1 . 7 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

ESI HC Threshold:246

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count: 6

SCOPUS Cited Count: 7

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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