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2010-3-15 · The experimental results indicated that PAM can be degraded by pure bacterial strains with a relatively high efficiency (>70%) using PAM as the sole carbon source. The degradation can be influenced by the initial concentration of the PAM, with a determinate proportion of PAM able to be degraded by the microbial cells when 50–1000 mg L −1 of the initial PAM was supplied.
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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.
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Get PriceFreely suspended and Ca-alginate-immobilized cells of Pimelobacter sp. were used for degradation of pyridine. When the pyridine concentration was up to 2 g l−1, freely suspended cells completely degraded pyridine regardless of the initial cell concentrations used. However, when the pyridine concentration increased to 4 g l−1, the initial cell concentration in freely suspended cell culture ...
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Get Price2020-6-16 · Polyacrylamide (PAM) is generally employed in wastewater treatment processes such as sludge dewatering and therefore exists in the sludge. Furthermore, it degrades slowly and can deteriorate methane yield during anaerobic digestion (AD). The impact or fate of PAM in AD under thermophilic conditions is still unclear. This study mainly focuses on PAM degradation and enhanced methane …
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Get PriceBiodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), polyacrylamide…
Get Price2016-3-14 · The worldwide application of synthetic water-soluble polymers brings about an environmental issue related to the pollution of water and soil (Chiellini et al. 2003).Polyacrylamide (PAM) is a typical water-soluble polymer with -[CH 2-CH]- repeating units linked by amide (−CONH 2) or carboxyl (−COOH) groups.Due to its high stability and widespread use, PAM can substantially accumulate in ...
Get Price2020-8-5 · Microorganisms 2020, 8, 1190 4 of 14 where max is the maximum specific growth rate (h1), S is the substrate concentration (mg/L), Ks is the half-saturation constant (mg/L), and Ki is the inhibition constant (mg/L). Thus, the specific degradation rate (v) can be calculated using the specific growth rate ( ) and growth yield (Yx/s) as below [37]: v =
Get Price2020-3-6 · DYCP-31DN (Beijing Liuyi Instrument Factory, China), and the electrophoresis image-forming instrument used was a FR980 (Sha nghai . Aerobic Biodegradation of 2-Picolinic Acid by a Comamonas Sp. Wang Qiaorui, Zheng Chunli*, Fan Yurui, Shen Zhenxing, Han Wenhao and Du Miaomiao
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Get Price2017-9-19 · However, the high molasses concentration inhibited the function of MECs. Nevertheless, anionic polyacrylamide (APAM) pretreatment of molasses was noted to be effective for succinic acid production in MECs even at an initial sugar concentration of 75 g L ‐1.
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Get PriceBiodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), polyacrylamide…
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Get PriceRheological Properties of Partially Hydrolyzed Polyacrylamide . The specific surface area is 150 m2/g measured by the BET method, and the corresponding specific weight is 2.4 g/ml. Partially hydrolysed polyacrylamide (HPAM) was purchased from Shandong Tongli Chemical Co. Ltd China, which has a molecular weight of 5-22 million g/moland relative density of 1.302 g/cm3.Sodium chloride (ACS ...
Get PriceBiodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), polyacrylamide…
Get PriceFungal DNA was only positive at high temperatures and at the end of the biodegradation process (101 and 137 days). A minimum of 10 colonies were isolated and identified by molecular techniques from the four treatments at days 33 and 101 by cultivation methods.
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Get Price2018-6-2 · Thus, K-carrageenan, alginate, agar, polyacrylamide-hydrazide, and polyurethane foam have been used suc-cessfully for the immobilization of microorganisms. Alginate has several advantages over others. In addi-tion to its high porosity and chemical stability, it of-fers a mild, fast, simple, and cheap immobilization method (Fukui and Tanaka, 1982).
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Get PriceBiodegradation of partially hydrolyzed polyacrylamide by immobilized bacteria isolated from HPAM‐containing wastewater - Liu - 2016. 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.
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Get PriceBiodegradation of such chemicals by microorganisms may provide an cost-effective method for their detoxification. We have investigated the degradation of cypermethrin by immobilized cells of Micrococcus sp. strain CPN 1 in various matrices such as, polyurethane foam (PUF), polyacrylamide…
Get Price2012-3-13 · Purity: ≥88 Usage: 1. It is used as a flocculant in water treatment industry. Also used in petroleum geology drilling configuration for removing non-dispersing low solid phase mud. 2. It can be used as setting agent in sugar industry settling agent (sugar co-agent); film formers. 3.
Get Price2017-9-8 · Gentamicin (purity, 99.99%), composed of C1a, C2, C2a and C1 (Fig. S3), was obtained from Zhichu Pharmaceutical Factory (ZPF) in Shandong Province, …
Get Price2007-10-25 · Goldman, D. & Merril, C.R. Silver staining of DNA in polyacrylamide gels: linearity and effect of fragment size. Electrophoresis 3 , 24–26 (1982). CAS Article Google Scholar
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Get PriceThe biodegradation of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) in liquid cultures with municipal anaerobic sludge showed that at least two degradation routes were involved in the disappearance of the cyclic nitramine. In one route, RDX was reduced to give the familiar nitroso derivatives hexahydro-1-nitroso-3,5-dinitro-1,3,5-triazine (MNX) and hexahydro-1,3-dinitroso-5-nitro-1,3,5 ...
Get PriceA comprehensive study of conditions of the biodegradation of a plastic additive 2,6-di-tert-butylphenol and proteomic changes in the degrader Pseudomonas aeruginosa san ai†Ana Medić a, Ksenija Stojanović b, Lidija Izrael-Živković a, Vladimir Beškoski b, Branka Lončarević c, Saša Kazazić d and Ivanka Karadžić * a a Department of Chemistry, Faculty of Medicine, University of ...
Get Price2020-11-26 · Biodegradation is a complex process which is dependent on several factors, such as availability of a substrate, surface characteristics, morphology, molecular weight of the polymers (Figure 3) and therefore, an exact definition of biodegradation is lacking (Albertsson et al., 1987; Ammala et al., 2011; Harrison et al., 2018).Further, biodegradation has been measured by a wide-range of ...
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Get Price2005-6-1 · Biodegradation of HMX was slower relative to that of RDX, consistent with our previous observations with Halifax sediment and other anaerobic systems . No significant loss of RDX (0.7 μM of 101 μM) or HMX (0.15 μM of 11 μM) was found in abiotic controls containing sterile sediment under similar conditions [pH 6.5, final E (versus Ag/AgCl ...
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