Biodegradation of partially hydrolyzed polyacrylamide
The special function bacteria R2 was screened from hydrolyzed polyacrylamide (HPAM)‐containing wastewater that could use HPAM as the sole carbon source and nitrogen source. Through optimizing the condition of HPAM biodegradation, the removal rate of R2 free strain reached to 41.6% when pH was 7, temperature was 35°C, inoculation quantity (v
Although polyacrylamide (PAM) and its derivatives have many useful applications, their release in nature can have impacts on the environment and human health, thus bioremediation approaches for residual PAM are urgently needed. Biodegradation of PAM and its derivatives has been studied only in the last two decades, with most emphasis on acrylamide biodegradation.
Biodegradation of polyacrylamide by bacteria isolated
Polyacrylamide (PAM), a linear water soluble polymeric compound with high molecular weight, is extensively used for oil production in China. Compared with the physico-chemical degradation of PAM, there is no acrylamide monomer, which causes peripheral neuropathy, released in the process of biodegradation.
Polyacrylamide degrading microbes have commonly been isolated from environments in which these polymers are used, such as polyacrylamide treated fields, oil sands tailings, oil fields, activated sludges etc., but also soil microbes have been shown to be capable of polyacrylamide catabolism (Guezennec et al., 2015; Joshi and Abed, 2017).
Biodegradation of partially hydrolyzed polyacrylamide
Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic environment was studied. Two HPAM-degrading bacterial strains, named PM-2 and PM-3, were
Biodegradation of partially hydrolyzed polyacrylamide by immobilized bacteria isolated from HPAM-containing wastewater. Authors. Jianghong Liu,
Biodegradation of partially hydrolyzed polyacrylamide
Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field Growth and biodegradation of HPAM by bacteria was explored. The results showed that bacteria could partly utilize HPAM as an either sole nutrient source of carbon or of nitrogen plus carbon; however
Abstract. This study evaluates the ability of two bacterial consortia (C2PL05 and BOS08), extracted from very different environments, to degrade low- (naphthalene, phenanthrene, anthracene) and high- (pyrene, perylene) molecular-weight polycyclic aromatic hydrocarbons (PAHs) at high (15–25 °C) and low (5–15 °C) temperature ranges.
Advances in the field of high‐molecular‐weight polycyclic
These studies were later the subject of reviews pertaining specifically to the field of HMW PAH biodegradation by bacteria (Kanaly and Harayama, 2000) or as part of excellent wider reviews that also covered HMW PAH biodegradation by eukaryotic organisms and biodegradation of other classes of hydrocarbon pollutants (Juhasz and Naidu, 2000; Van
Original article Perspectives of lupine wholemeal protein and protein isolates biodegradation Elena Bartkiene,1* Vytaute Sakiene,1 Vita Lele,1 Vadims Bartkevics,2,3 Janis Rusko,3 Claudia Wiacek,4 Modestas Ruzauskas,1 Peggy G. Braun,4 Paulius Matusevicius,1 Zenon Zdunczyk,5 Przemysław Zdunczyk5 & Jerzy Juskiewicz5 1 Lithuanian University of Health Sciences, Tilzes g. 18, LT-47181 Kaunas, Lithuania
Polymers, Biodegradable - Künkel - Wiley Online Library
Monomers* * A = adipic acid; B = 1,4‐butanediol; T = terephthalic acid; BA and ABA = co‐monomers from BDO and adipic acid; BT and BTB = comonomers from BDO and terephthalic acid. Test 1: 1750 mg polyester in 80 mL media. Intermediates from isolated pure culture after 21 d. Enzyme activity stopped by pH shift (in situ building of high amounts of acids during degradation).Test 2: 350 mg
Project Methods The overall approach for this research will combine analyses of biodegradation processes with measurements of the microbial communities responsible for, or affected by, these processes. The kinetics and metabolites of biodegradation of environmental contaminants (organic and inorganic) will be measured in soil, vadose zone, and groundwater.
- Does Pam degradation affect flocculant performance?
- PAM-based flocculant degradation has been mainly studied for PAMs in aqueous solutions. The degradation of PAMs results in a reduction of the molecular weight of the polymer and can adversely affect the performance of such aqueous solutions in their commercial application as flocculants.
- Does anionic polyacrylamide improve coagulation-flocculation process?
- Aguilar, M. I. et al. Improvement of coagulation-flocculation process using anionic polyacrylamide as coagulant aid. Chemosphere 58, 47–56 (2005). Muller, G., Fenyo, J. C. & Selegny, E. High molecular weight hydrolyzed polyacrylamides.
- Do coagulant and Pam selection affect floc recovery?
- The combined effects of AS coagulant and PAM selection on floc recovery factor highlighted that the recovery ability of maturated floc aggregates (after 1-min breakage at 600 s −1) was also determined by the predominant mechanism of ballasted flocculation. 3.3. Treated water quality by sedimentation following floc maturation 3.3.1.
- Does Pam selection affect floc bridging and ballasted flocculation kinetics?
- To sum up, not only maturated floc average size but also strength factor seemed to be closely related to the selection of differently charged PAMs at 1.0 mg Al/L, presumably owing to the influence of PAM selection on polymer bridging and ballasted flocculation kinetics , .
