Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).
2019-4-1 · Biodegradation of polyacrylamide begins with amidase catalysed deamination of polyacrylamide to ammonia and polyacrylate. The liberated ammonia is then used as a nitrogen source for growth by the microbes. The carbon backbone, polyacrylate, is more recalcitrant to biodegradation than the amide moieties.
Get Price2014-9-12 · Degradation and transfer of polyacrylamide based flocculent in sludge and industrial and natural waters. Flocculants are widely used in numerous industrial domains (food-processing industry, mineral industries, chemical industries, water purification, wastewater treatment) to improve the solid/liquid separation in water-containing fine particles.
Get Price2013-9-14 · Biodegradation of the single-labelled PAA superabsorbent in 100 g of four different soils ranged between 0.0045 and 0.0076 μg μg –1 after 24 weeks (i.e., day 168) at 25 °C (Table 2). The degradation of 0.45–0.76 % based on the initial weight was, however, overshadowed by a large intra-replicate variability including standard deviations that were up to 50 % larger than the mean (Fig. 1 ).
Get Price2012-11-22 · adsorption to soil particles and biodegradation). Table 3.1 Summary of PECs for acrylamide Scenario PECwater (µg/l) PECair (mg/m3) Acrylamide production (including polyacrylamide production) 0.05-<10 7.6.10-6-2.3 .10-6 Polyacrylamide use as a coagulant and flocculent in …
Get Price2018-2-1 · The polyacrylamide gel showed a strong protein band of approximately 16 kDa, which was detected by silver staining. Because in this case the keratinolytic activity was obtained from a culture medium in which hair was the only substrate, it was what did concluded we may conclude that the protein visualized in the gel was the main enzyme produced by P. pulmonarius ( Fig. 6 ).
Get Price2013-10-7 · ment significantly. Biodegradation is one of the classic methods for removal of undesired organic compounds to concentrations that are undetectable or below limits established as acceptable by regulatory agencies. Acrylamide is likely to partially biodegrade in …
Get Price2018-5-18 · Stahl et al. investigated the biodegradation of two superabsorbent polymers (namely a crosslinked, insoluble polyacrylate and an insoluble polyacrylate/polyacrylamide copolymer) in soil by the white-rot fungus Phanerochaete chrysosporium. The polymers were both solubilized and mineralized by the fungus but solubilization and mineralization of the copolymer was much more rapid than that of the …
Get Price2016-12-6 · Concentrations of acrylamide near acrylamide/polyacrylamide producers range from 0.02 to 0.08 μg/g of soil . In the present study, we report on the screening of soil isolates from which a promising one that could degrade aliphatic (including acrylamide) as well as aromatic amides was identified as Arthrobacter sp. DBV1 at significantly high concentrations of 30 mM.
Get Price2018-9-1 · Abstract. Bacterial pectinases degrade the pectic substances present in plant tissues and particularly, polygalacturonases catalyze the hydrolysis of α- (1,4) glycosidic bonds linking d -galacturonic acid units. In this study, polygalacturonase from Streptomyces halstedii ATCC 10897 was immobilized by the matrix entrapment technique using different ...
Get Price2016-4-1 · The biodegradation of BPA by the laccase from T. polyzona led to the formation of isopropenylphenol as the major product (Chairin et al., 2013; Fig. S5). However, the use of the ligninolytic enzyme mixture - laccase, lignin peroxidase (LiP), manganese peroxidase (MnP) - gave a different product, potentially bisphenol F, p -(benzoyloxy)phenol or 4-benzylresorcinol ( Gassara et al., 2013 ; …
Get Price2018-9-7 · He, Q. & Dong, B. Biodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. Bioresour. Technol. 153 , …
Get Price2018-3-26 · Biodegradation of HPAM by microbes may be an efficient way to solve those problems. Microbial biodegradation is considered an environmentally friendly safe technique. The isolation of microbes that are able to degrade HPAM from the oil field produced water was investigated in this study.
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic environment was...
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic environment was ...
Get Price2020-1-15 · Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have been a lot of studies focusing on the biodegradability ...
Get Price2016-5-19 · Kinetics and thermodynamics of hydrolyzed polyacrylamide (HPAM) biodegradation in anaerobic and aerobic activated sludge biochemical treatment systems were explored to determine the maximum rate and feasibility of HPAM biodegradation. The ...
Get PriceThe increasing usage of partially hydrolyzed polyacrylamide (HPAM) in oilfields as a flooding agent to enhance oil recovery at so large quantities is an ecological hazard to the subsurface ecosystem due to persistence and inertness. Biodegradation of HPAM is a potentially promising strategy for dealing with this problem among many other methods available.
Get PriceAnaerobic biodegradation of partially hydrolyzed polyacrylamide in long-term methanogenic enrichment cultures from production water of oil reservoirs Hao Hu . Jin-Feng Liu . Cai-Yun Li .
Get PriceProducers, consumers, and policy-makers are faced with a plethora of choices and approaches, where relevant information is hard to come by. This Review will try and put things in the right ... Polyacrylamide (PA) is also considered as a hydro-degradable ... as the recycling and biodegradation of new chemical products. Gadi Rothenberg was born ...
Get Price2010-7-21 · Phenol-degrading bacteria were isolated from the rhizosphere of duckweed (Lemna aoukikusa) using an enrichment culture method. One of the isolates, P23, exhibited an excellent ability to degrade phenol and attach to a solid surface under laboratory conditions. Phylogenetic analysis revealed that P23 belongs to the genera Acinetobacter and has the highest similarity to Acinetobacter …
Get PriceBiodegradation of low molecular weight polyacrylamide. Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have ...
Get Price2016-3-29 · 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/v ...
Get PriceBiodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess. Song T(1), Li S(1), Ding W(1), Li H(1), Bao M(2), Li Y(3).
Get PriceStudy on biodegradation of hydrolyzed polyacrylamide in polymer flooding produced wastewater Chang Fan1 Chen Li1 Chen Liang2 Tian Yingtian3 Chen Wuling1(1.Life Sciences Institute,Northwest University,Xi'an 710069,China;2.Bio-Engineering Institute,Henan Industrial University,Zhengzhou 450001,China;3.CNPC Changqing Oilfield Company No.1 Gas Plant ...
Get Price2019-5-18 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism. Tianwen Song Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao, 266100, China; College of Chemistry and ...
Get PriceWater-soluble polyacrylamide is commercially available in different domains of industry, such as water purified, paper making, pharmacy, agriculture and oil exploitation. Especially polyacrylamide is used for polymer displacement, which can enhance oil recovery through increasing the sweeping efficiency. Good economic effects are achieved by the industrial application of polymer in various oil ...
Get Price2021-7-13 · 1 Title: Transfer and degradation of polyacrylamide based flocculants in hydrosystems: a review 2 3 Authors: A. G. Guezennec1, C. Michel1, K.Bru1, S. Touze1, N. Desroche2, I. Mnif3, M. Motelica-Heino4 4 1 BRGM 5 2 Nexidia SAS, 15 Rue de Mayence 21000 DIJON France 36 Université de Nice 7 4 ISTO, UMR 7327 CNRS-Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans cedex 2
Get Price2010-7-21 · Phenol-degrading bacteria were isolated from the rhizosphere of duckweed (Lemna aoukikusa) using an enrichment culture method. One of the isolates, P23, exhibited an excellent ability to degrade phenol and attach to a solid surface under laboratory conditions. Phylogenetic analysis revealed that P23 belongs to the genera Acinetobacter and has the highest similarity to Acinetobacter …
Get Price2006-2-1 · Biodegradation of gallotannins and ellagitannins Biodegradation of gallotannins and ellagitannins Mingshu, Li; Kai, Yao; Qiang, He; Dongying, Jia 2006-02-01 00:00:00 (College of Light Industry, Textile & Food Engineering, Sichuan University, Chengdu 610065, P.R. China) Biodegradation of gallotannins and ellagitannins LI MINGSHU, YAO KAI*, HE QIANG and JIA DONGYING (Received …
Get PriceBiodegradation of low molecular weight polyacrylamide. Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have ...
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem. Biodegradation of HPAM may be an efficient way to solve these problems. The biodegradability of HPAM in an aerobic environment was ...
Get PriceAbstract Hydrolyzed polyacrylamide (HPAM), which is extensively used for oil extraction in an oilfield, produces waste water that enters the groundwater system posing a threat to the safety of plants and animals. Among the many methods to removal the HPAM, the biodegradation based screened bacteria and sludge is an efficient method. Combined anaerobic and aerobic biological processes were used ...
Get PriceTo deal with polyacrylamide (PAM) wastewater, granular sludge formed in glucose-fed sequencing batch reactors (SBR) was employed to cultivate PAM-degrading granules. Three replicated SBRs were operated with increasing PAM concentration in the influent from 67 to …
Get Price2018-5-1 · Biodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and ...
Get Price2019-5-18 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism. Tianwen Song Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao, 266100, China; College of Chemistry and ...
Get PriceAffiliations. Biotechnology Center, Utah State University, 84322-4705, Logan, UT, USA. Michael D. Cameron, Zachary D. Post, James D. Stahl & Steven D. Aust
Get PriceAn efficient way to solve the environmental pollution deriving from hydrolyzed polyacrylamide (HPAM)-containing drilling wastewater is urgent. This work adopted a novel method coupling Fenton oxidation with sequencing batch reactor (SBR) to treat gas-field drilling wastewater successively. This Fent …
Get Price4.Xiaohu Dai, Fan Luo, Jing Yi, Qunbiao He,Bin Dong*.Biodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system.Bioresource Technology.2014,153:55-61.
Get PriceMade available by U.S. Department of Energy Office of Scientific and Technical Information ...
Get PriceBiodegradation of partially hydrolyzed polyacrylamide. Partially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil–water separation, degrades naturally to produce toxic …
Get PriceBiodegradation of low molecular weight polyacrylamide. Polyacrylamide (PAM), particularly high molecular PAM (>10 7 Dal), with a viscosity of over 58 centipoise (cp), has been increasingly used for enhanced oil recovery in oilfields ().Produced water generated during enhanced oil recovery contains high concentration of PAM, which should be removed before discharge (Yan et al. 2016).There have ...
Get PriceBiodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism Author links open overla
Get PricePartially hydrolyzed polyacrylamide (HPAM) in production water after polymer flooding in oil filed causes environmental problems, such as increases the difficulty in oil-water separation, degrades naturally to produce toxic acrylamide and endanger local ecosystem.
Get Price2018-5-1 · Biodegradation of hydrolyzed polyacrylamide by the combined expanded granular sludge bed reactor-aerobic biofilm reactor biosystem and key microorganisms involved in this bioprocess. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China; College of Chemistry and ...
Get PriceStudy on biodegradation of hydrolyzed polyacrylamide in polymer flooding produced wastewater Chang Fan1 Chen Li1 Chen Liang2 Tian Yingtian3 Chen Wuling1(1.Life Sciences Institute,Northwest University,Xi'an 710069,China;2.Bio-Engineering Institute,Henan Industrial University,Zhengzhou 450001,China;3.CNPC Changqing Oilfield Company No.1 Gas Plant ...
Get Price2019-5-18 · Biodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism. Tianwen Song Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education/Institute for Advanced Ocean Study, Ocean University of China, Qingdao, 266100, China; College of Chemistry and ...
Get PriceBiodegradation of polyacrylamide by anaerobic digestion under mesophilic condition and its performance in actual dewatered sludge system. PAM biodegradation has been studied by some researchers at present, but the results seem contradictory. the content of acrylamide as a monomer and toxic derivatives was studied and shown in Fig. 4.
Get PricePolyacrylamide (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. Unfortunately, few microorganisms have been isolated which can degrade PAM.
Get PriceStudy on biodegradation of hydrolyzed polyacrylamide in polymer flooding produced wastewater Chang Fan1 Chen Li1 Chen Liang2 Tian Yingtian3 Chen Wuling1(1.Life Sciences Institute,Northwest University,Xi'an 710069,China;2.Bio-Engineering Institute,Henan Industrial University,Zhengzhou 450001,China;3.CNPC Changqing Oilfield Company No.1 Gas Plant ...
Get Price2006-1-1 · Phanerochaete chrysosporium was introduced into biodegradation of polyacrylamide(PAM), and effects of glucose amount, pH, N concentration, Mn2+ concentration and biodegradation time on biodegradation of PAM were studied. Results show that Phanerochaete chrysosporium has special abilities of enzyme catalysis biodegradation of PAM.
Get Price2021-3-12 · Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field. Journal of Hazardous Materials 2010, 184 (1-3) , 105-110.
Get Pricebiodegradation of graphene oxide To cite this article: Rajendra Kurapati et al 2018 2D Mater. 5 015020 ... Native polyacrylamide gel electrophoresis The interaction of HRP with the surface of GO sheets was evaluated by native polyacrylamide gel electrophoresis (PAGE) after …
Get Price2017-1-1 · International Biodeterioration & Biodegradation 65 (2011) 340e344 ... obtained from local producers represented by the Cooperativa Agroindustrial de Corumbataí do Sul e Região (COAPROCOR, Corumbataí, Paraná, Brazil). The YPFW was washed and dried in an ... Polyacrylamide gel electrophoresis of crude laccase
Get PriceThe involvement of catechol as the hydroxylated intermediate during the biodegradation of ethylbenzene was established by TLC, HPLC and enzyme analysis. The specific activity of Catechol 2,3-dioxygenase in the cell free extracts of P. fluorescens-CS2 was determined to be 0.428 micromoles min(-1) …
Get Price2010-7-21 · Phenol-degrading bacteria were isolated from the rhizosphere of duckweed (Lemna aoukikusa) using an enrichment culture method. One of the isolates, P23, exhibited an excellent ability to degrade phenol and attach to a solid surface under laboratory conditions. Phylogenetic analysis revealed that P23 belongs to the genera Acinetobacter and has the highest similarity to Acinetobacter …
Get PricePolyacrylamide (PAM) used in sludge dewatering widely exists in high-solid anaerobic digestion. Degradation of polyacrylamide accompanied with accumulation of its toxic monomer is important to disposition of biogas residues. The potential of anaerobic digestion activity in microbial utilization of PAM was investigated in this study.
Get Price2014-9-6 · Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field. Bao M, Chen Q, Li Y, Jiang G. J Hazard Mater, (1-3):105-110 Cited by: undefined articles MED: 20813455
Get Price2021-3-12 · Biodegradation of partially hydrolyzed polyacrylamide by bacteria isolated from production water after polymer flooding in an oil field. Journal of Hazardous Materials 2010, 184 (1-3) , 105-110.
Get PriceBiodegradation of hydrolyzed polyacrylamide by a Bacillus megaterium strain SZK-5: Functional enzymes and antioxidant defense mechanism Song, Tianwen Li, Shanshan
Get PriceAcademia.edu is a platform for academics to share research papers.
Get PriceBiodegradation of polymers . By Premraj R and Mukesh Doble. ... polylactic acid, polyurethane, PVA, nylon, polycarbonate, polyimide, polyacrylamide, polyamide, PTFE and ABS have been reviewed. Pseudomonas species degrade polyethers, polyesters, PVA, polyimides and PUR effectively. No microorganism has been found to degrade polyethylene without ...
Get Price2020-5-15 · polyacrylamide gel and (iii) agarose gel in an attempt to stabilise the phenol-degrading pathway. The initial rate of phenol degradation determined from experiments with whole cells immobilised in calcium-alginate, polyacrylamide gel and agarose gel were 6.01,0.10 and 1.37 jimoles phenol min gram of immobilised cells, respectively. m
Get Price1991-9-20 · Drag‐reduction efficiency, shear stability, and biodegradation resistance of carboxymethyl cellulose‐based and starch‐based graft copolymers S. R. Deshmukh Materials Science Centre, Indian Institute of Technology, Kharagpur 721302, India
Get Price2019-5-26 · Polyacrylamides (PAMs) have wide application in many industries and in agriculture. Scientific research and industrial applications manifested a need for a method that can quantify substrate-borne PAM. The N-bromination method (a PAM analytical technique based on N-bromination of amide groups and spectrophotometric determination of the formed starch−triiodide complex), which was …
Get PriceABSTRACT Dibenzothiophene is a sulfur heterocycle found in crude oils and coal. The biodegradation of dibenzothiophene through the Kodama pathway by Pseudomonas sp. strain BT1d leads to the formation of three disulfides: 2-oxo-2-(2-thiophenyl)ethanoic acid disulfide, 2-oxo-2-(2-thiophenyl)ethanoic acid-2-benzoic acid disulfide, and 2,2′-dithiodibenzoic acid.
Get Price