The effect of pH on solubilization of organic matter and microbial community structures in sludge fermentation

Maspolim, Yogananda; Zhou, Yan; Guo, Chenghong; Xiao, Keke; Ng, Wun Jern

doi:10.1016/j.biortech.2015.04.087

Cited by 169 publications

(47 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, a high pH could be interesting. Previous studies reported that COD solubilization increased at acidic (pH 5) and alkaline (pH 9, 10, 11) conditions for AS and a mixture of AS and PS fermentation Maspolim et al, 2015). However, higher VFA recovery was observed at pH of 8-10 for a mixture of AS and PS fermentation (Maspolim et al, 2015) and at pH of 9-11 for AS fermentation Jie et al, 2014) as compare to acidic and neutral conditions.…”

Section: Overall Cod N and P Mass Balancescontrasting

confidence: 59%

“…Previous studies reported that COD solubilization increased at acidic (pH 5) and alkaline (pH 9, 10, 11) conditions for AS and a mixture of AS and PS fermentation Maspolim et al, 2015). However, higher VFA recovery was observed at pH of 8-10 for a mixture of AS and PS fermentation (Maspolim et al, 2015) and at pH of 9-11 for AS fermentation Jie et al, 2014) as compare to acidic and neutral conditions. For example, Jie et al (2014) found a specific VFA production of 300 mg VFA-COD/g VSS during AS fermentation at pH 10, whereas at a pH of 5 the specific production only was 80 mg VFA-COD/g VSS.…”

Section: Overall Cod N and P Mass Balancescontrasting

confidence: 59%

See 1 more Smart Citation

Volatile fatty acids production from sewage organic matter by combined bioflocculation and anaerobic fermentation

Khiewwijit

Keesman

Rijnaarts

et al. 2015

Bioresource Technology

View full text Add to dashboard Cite

Section: Overall Cod N and P Mass Balancescontrasting

confidence: 59%

Section: Overall Cod N and P Mass Balancescontrasting

confidence: 59%

Volatile fatty acids production from sewage organic matter by combined bioflocculation and anaerobic fermentation

Khiewwijit

Keesman

Rijnaarts

et al. 2015

Bioresource Technology

View full text Add to dashboard Cite

“…It is worth noting that a high protein or polysaccharide content would lead to the dominance of Proteiniclasticum (highest in HS (9%)), which is able to produce VFAs as end products from fermentation [45]. For Saccharofermentans , the main end products of fermentation from glucose were HAc, lactate and fumarate [46], which peaked at ~4% in S. Sedimentibacter , which was mainly detected in H (3%) and only enriched at around pH 8.0, was known to ferment proteins through Stickland-type reactions to produce VFAs [47]. As stated in Fig.…”

Section: Resultsmentioning

confidence: 99%

What could the entire cornstover contribute to the enhancement of waste activated sludge acidification? Performance assessment and microbial community analysis

Zhou

Zhang

Wen

et al. 2016

Biotechnol Biofuels

View full text Add to dashboard Cite

BackgroundVolatile fatty acids (VFAs) production from waste activated sludge (WAS) digestion is constrained by unbalanced nutrient composition (low carbon-to-nitrogen ratio). Characteristics conditioning by extra carbon sources, normally in the mixture of raw solid, has been reported to be an efficient approach to enhance WAS acidification. However, little attention has been paid to the contributions of other adjustment forms. Moreover, the corresponding ecological estimation has not been investigated yet.ResultsIn this study, the feasibility of corn stover (CS) conditioning with three adjustment forms [pretreated straw (S), hydrolysate (H) and hydrolysate + straw (HS)] in improving VFAs production from WAS was demonstrated. It was observed that the highest VFAs yield was achieved in H co-digesting test (574 mg COD/g VSS), while it was only 392 mg COD/g VSS for WAS digesting alone. VFAs composition was strongly adjustment form-dependent, as more acetic (HAc) and propionic (HPr) acids were generated in CS_HS and S, respectively. High-throughput sequencing analysis illustrated that acid (especially HAc)-producing characteristic genera (Bacteroides, Proteiniclasticum and Fluviicola) and HPr-producing characteristic genera (Mangroviflexus and Paludibacter) were detected by CS_HS and S conditioning, respectively.ConclusionsCorn stover conditioning greatly upgraded the WAS acidification performance, especially for the CS_H adjustment form, and the VFAs yield gained was considerably larger than that previously reported. CS adjustment forms played an important role in structuring the innate microbial community in WAS. Canonical correlation analysis illustrated that characteristic genera, with better hydrolysis and acidification abilities, could be enriched by the feedstocks with certain content of cellulose, hemicellulose or their saccharification hydrolysates. Moreover, ecological estimation revealed that, as far as the entire CS (including S and H) per acre was concerned, the capacity of WAS treatment would reach that produced in a one million mts capacity wastewater treatment plants (WWTPs) per day. These findings may have crucial implications for the operation of WWTPs.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-016-0659-y) contains supplementary material, which is available to authorized users.

show abstract

“…In this study, although the variable EC and DO implied that the ion contents and the photoautotrophs shifted with the periphyton growth phase, the relatively stable pH provided a beneficial condition for periphyton growth. Certainly, pH is reported as one of the critical factors affecting the microbial activity and composition (Huang et al, 2014;Maspolim et al, 2015;Yu et al, 2014). Thus, most probably, the relatively steady removal rates of Cu (II) and Cd (II) from the water-and Na 2 EDTA-washed leachates were also attributable to the stable pH conditions via periphyton acclimation and adaptation.…”

Section: +mentioning

confidence: 99%

Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton

Yang

Liu

et al. 2016

Bioresource Technology

View full text Add to dashboard Cite

The effect of pH on solubilization of organic matter and microbial community structures in sludge fermentation

Cited by 169 publications

References 32 publications

Volatile fatty acids production from sewage organic matter by combined bioflocculation and anaerobic fermentation

Volatile fatty acids production from sewage organic matter by combined bioflocculation and anaerobic fermentation

What could the entire cornstover contribute to the enhancement of waste activated sludge acidification? Performance assessment and microbial community analysis

Bioremediation of agricultural solid waste leachates with diverse species of Cu (II) and Cd (II) by periphyton

Contact Info

Product

Resources

About