Biodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess

Song, Tianwen; Li, Shanshan; Ding, Wande; Li, Haoshuai; Bao, Mutai; Li, Yang

doi:10.1016/j.biortech.2018.04.121

Cited by 58 publications

(15 citation statements)

References 47 publications

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“…We believe that further studies on PAM and biochar soil amendments with side‐by‐side comparisons and under various environmental conditions are warranted. Frequency of application: Repeated annual PAM application improved soil enzyme activity. However, the improvement of enzyme activity by PAM treatment may increase the decomposition rate of PAM each year (Sojka, Bjorneberg, Entry, Lentz, & Orts, ; Song et al, ). If this is the case, then the improvement in soil health (enzyme activity) by PAM may actually hasten the decomposition of PAM itself, in effect, slowly self‐destruct; this aspect needs further study. Different ecosystems: This adaptation for restoration ecology and water saving strategy may increase local yield gains under the anticipated increasing drought stress accompanying climate change.…”

Section: Discussionmentioning

confidence: 99%

“…PAM was supplied by Beijing Hanlimiao New Technology Co., Ltd. (Beijing, China). It is a white granular polymer with a high molecular weight of about 2 × 10 7 Da (Song et al, ), a density of 1.30 g cm −3 , and a particle size of 0.2‐ to 0.9‐mm diameter. It swells with water and is almost insoluble in organic solvents.…”

Section: Methodsmentioning

confidence: 99%

“…It swells with water and is almost insoluble in organic solvents. It contains by weight 50% C, 8% H, 22% O, and 20% N; the N may be available as a nutrient for microorganisms when PAM is broken down by physical degradation or biodegradation, as suggested by Seybold () and Song et al (). Under soil aerobic conditions, the residual monomer (acrylamide) of PAM is quickly hydrolyzed, and the resulting ammonium (

{NN}_{4}^{+}

) is ultimately converted to nitrate (

{NO}_{3}^{-}

; Abdelmagid & Tabatabai, ).…”

Section: Methodsmentioning

confidence: 99%

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Exploring soil amendment strategies with polyacrylamide to improve soil health and oat productivity in a dryland farming ecosystem: One‐time versus repeated annual application

McLaughlin

et al. 2020

Land Degrad Dev

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Degraded lands resulting from human and natural causes are widespread in arid and semiarid regions throughout the world. Polyacrylamide (PAM) soil amendments are increasingly used to remediate these degraded lands with the potential benefits on soil health and crop production. However, the scientific evidence of farm-scale use of one-time versus repeated application of PAM has not been reported. The specific objective of this research was to determine the effects of single versus multiple annual PAM application on (a) the dynamic changes in soil quality parameters and (b) oat crop productivity indicators in a dryland farming ecosystem. Our data illustrated that multiple years of annual application of PAM significantly increased soil profile water storage, whereas it reduced soil bulk density and electrical conductivity in the top (0-20 cm) and deeper layers (20-60 cm) over those for the control or single PAM application. The improved soil microecological environments led to increased activities of soil enzymes urease (up to 106%), invertase (94%), and catalase (45%). These in turn promoted soil nutrient turnover and availability (e.g., 76% higher soil alkaline N) and crop growth leading to the improvement in grain protein (up to 31%), protein yield (58%), and partial factor productivity of nitrogen (20%), than did the control treatment. Taken together, these soil and crop performance indicators suggest that repeated annual PAM application for a minimum of 2-3 years would be an effective strategy to combat drought and land degradation and foster sustainable crop production in dryland agriculture under a changing climate scenario. K E Y W O R D S enzyme activity, nutrient turnover, organic matter, soil amendment, soil electrical conductivity, sustainable dryland farming

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

{NN}_{4}^{+}

) is ultimately converted to nitrate (

{NO}_{3}^{-}

; Abdelmagid & Tabatabai, ).…”

Section: Methodsmentioning

confidence: 99%

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Exploring soil amendment strategies with polyacrylamide to improve soil health and oat productivity in a dryland farming ecosystem: One‐time versus repeated annual application

McLaughlin

et al. 2020

Land Degrad Dev

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“…Dai et al (2015) indicated that enzymes presumably involved in PAM metabolism were present in anaerobic cultures able to utilize PAM; however, many of these enzymes are known to be associated with glucose metabolism, and glucose was also added to the incubations in that study. More recently, Song et al (2018) detected laccase (an oxidase) and dehydrogenase activities in aerobic and anaerobic bioreactor systems able to utilize HPAM in the absence of glucose. Overall, enzymes involved in the hydrolyzation of HPAM or PAM have been widely detected in microbial cultures able to utilize the polymer as a N source (Kay-Shoemake et al 1998b; Yu et al 2015).…”

Section: Discussionmentioning

confidence: 99%

High temperature utilization of PAM and HPAM by microbial communities enriched from oilfield produced water and activated sludge

et al. 2019

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Non-hydrolyzed polyacrylamide (PAM) and partially hydrolyzed polyacrylamide (HPAM) are commonly used polymers in various industrial applications, including in oil and gas production operations. Understanding the microbial utilization of such polymers can contribute to improved recovery processes and help to develop technologies for polymer remediation. Microbial communities enriched from oilfield produced water (PW) and activated sludge from Alberta, Canada were assessed for their ability to utilize PAM and HPAM as nitrogen and carbon sources at 50 °C. Microbial growth was determined by measuring CO 2 production, and viscosity changes and amide concentrations were used to determine microbial utilization of the polymers. The highest CO 2 production was observed in incubations wherein HPAM was added as a nitrogen source for sludge-derived enrichments. Our results showed that partial deamination of PAM and HPAM occurred in both PW and sludge microbial cultures after 34 days of incubation. Whereas viscosity changes were not observed in cultures when HPAM or PAM was provided as the only carbon source, sludge enrichment cultures amended with HPAM and glucose showed significant decreases in viscosity. 16S rRNA gene sequencing analysis indicated that microbial members from the family Xanthomonadaceae were enriched in both PW and sludge cultures amended with HPAM or PAM as a nitrogen source, suggesting the importance of this microbial taxon in the bio-utilization of these polymers. Overall, our results demonstrate that PAM and HPAM can serve as nitrogen sources for microbial communities under the thermophilic conditions commonly found in environments such as oil and gas reservoirs. Electronic supplementary material The online version of this article (10.1186/s13568-019-0766-9) contains supplementary material, which is available to authorized users.

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“…Therefore, the amidase and monooxygenase produced by microorganisms are the key factors for the degradation of HPAM. 15,30 4 | CONCLUSION…”

Section: Analysis Of Hpam Degradation Mechanismmentioning

confidence: 99%

Treatment of partially hydrolyzed polyacrylamide by mixed bacteria isolated from wastewater

Dong

Wang

2020

Env Prog and Sustain Energy

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In this work, a mixed strain which could degrade hydrolyzed polyacrylamide (HPAM) was constructed based on SS5 and SS6 isolated from two wastewater samples. SS5 is a globular gram-negative bacterium, and SS6 is a rod-shaped gram-negative bacterium. Moreover, SS5 and SS6 were identified as Acinetobacter sp. and Pseudomonas sp., respectively. The removal performance of the mixed strain was optimized using single-factor experiment and response surface methodology. The maximal HPAM removal efficiency 29.78% was observed at pH 7.5, 35 C, 170 rpm rotation speed, and inoculum loading 3% (v/v) for 7 days. The optimal concentrations of nutrients were 0.32 g/L glucose, 0.21 g/L NaNO 3 , 2.10 g/L KH 2 PO 4-K 2 HPO 4 , and the HPAM removal efficiency reached 45.82%. Finally, the optimal HPAM concentration and the HPAM removal efficiency were 300 mg/L and 45.82%, respectively. The results indicate that the mixed strain was a potential candidate for dealing with oil-or gasfield sewage with high hydrolyzed polyacrylamide concentration.

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Biodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess

Cited by 58 publications

References 47 publications

Exploring soil amendment strategies with polyacrylamide to improve soil health and oat productivity in a dryland farming ecosystem: One‐time versus repeated annual application

Exploring soil amendment strategies with polyacrylamide to improve soil health and oat productivity in a dryland farming ecosystem: One‐time versus repeated annual application

High temperature utilization of PAM and HPAM by microbial communities enriched from oilfield produced water and activated sludge

Treatment of partially hydrolyzed polyacrylamide by mixed bacteria isolated from wastewater

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