Immobilization of Micro-Organism on Macroporous Polyurethane Carriers

Zhou, Lincheng; Bai, Xue; Li, Yanfeng; Ma, Peng‐Cheng

doi:10.1089/ees.2007.0220

Cited by 11 publications

(6 citation statements)

References 15 publications

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“…[20][21][22] Furthermore, the start-up periods of fixed-film wastewater treatment reactors were reduced by inoculating activated sludge from wastewater treatment plants with suspended growth process, attached biofilm reactors or using purchased microorganisms cultured specially for enhancing wastewater treatment in fixed biofilm treatment technologies. [23,24] Similar strategy of seeding filter media with activated sludge has been followed in the present study to develop biofilm on media that was used in a trickling filter for the treatment of municipal wastewater. However, the start-up phase was reduced to 36 h at low and 24 h at mesophilic temperature regimes for achieving effective treatment of wastewater as compared to previously reported bioreactors.…”

Section: Resultsmentioning

confidence: 99%

“…To study the performance of the reactor at both seasons (winter and summer), physicochemical analysis of the influent to each media (rubber, polystyrene, plastic and stones) and effluent at certain time intervals (12,24,36 and 48 h) was carried out in triplicate. The physicochemical parameters analysed included chemical oxygen demand (COD), BOD 5 , dissolved oxygen (DO), total suspended solids (TSS), total dissolved solids (TDS) and electrical conductivity (EC).…”

Section: Physicochemical Analysis Of Wastewatermentioning

confidence: 99%

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Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Naz

Saroj

Mumtaz

et al. 2014

Environmental Technology

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Attached growth processes for wastewater treatment have significantly been improved during recent years. Their application can be extended to sustainable municipal wastewater treatment in remote locations and in developing countries for the purpose of organic matter (biochemical oxygen demand, BOD) removal and pathogenic decontamination. The aim of this study is to assess selected packing media for biological trickling filters (BTFs) and to develop a simplified model for describing the capacity of BOD removal in BTFs. In this work, BTFs with four different media viz., rubber, polystyrene, plastic and stone have been investigated at two temperature ranges of 5-15°C and 25-35°C. The average removal of both chemical oxygen demand and BOD was higher than 80 and 90% at temperature ranges of 5-15 and 25-35°C, respectively. The geometric mean of faecal coliforms in BTF using polystyrene, plastic, rubber and stone as filter media was reduced by 4.3, 4.0, 5.8 and 5.4 log10, respectively, at a low temperature range of 5-15°C. At a higher temperature range of 25-35°C, the faecal coliform count was reduced by 3.97, 5.34, 5.36 and 4.37 log10 from polystyrene, plastic, rubber and stone media BTF, respectively. Simplified model was developed and used to estimate the optimal BOD loading rates (Bvd) for designing robust BTF systems, with appropriate filter media. It has been concluded that highly efficient BTFs can be designed using various filter media, which may be capable of treating organic loading rates of more than 3 kg BOD/m3 day. These types of BTFs can be applied for the BOD and microbial contaminants removal of wastewater for potential reuse in developing countries.

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Section: Resultsmentioning

confidence: 99%

Section: Physicochemical Analysis Of Wastewatermentioning

confidence: 99%

Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Naz

Saroj

Mumtaz

et al. 2014

Environmental Technology

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“…Thus, these may suggest that the better structured magnetic Fe 3 O 4 /PUF composite would be guaranteed when the nanoparticles Fe 3 O 4 did not exceed 5.0%. And the resultant PUF composite should have a high opening ratio and large amounts of pores which maybe enhance the convenient mass transfer in the wastewater treatment [29].…”

Section: Xrd Pattern and Magnetic Analysis Of Fe 3 O 4 Particlesmentioning

confidence: 99%

Synthesis and characterization of novel magnetic Fe3O4/polyurethane foam composite applied to the carrier of immobilized microorganisms for wastewater treatment

Zhou

et al. 2010

Res Chem Intermed

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The objective of this work was to prepare novel magnetic Fe 3 O 4 /polyurethane foam (Fe 3 O 4 /PUF) composites applied to the carriers of immobilized microorganisms for toluene-containing wastewater treatment. The morphology and structure of Fe 3 O 4 /PUF composite were characterized by X-ray diffraction, Fourier transform IR spectroscopy, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, and magnetic property measurement system. These morphological investigations revealed that Fe 3 O 4 nano-particles were well dispersed into the matrix of PUF with nano-scale diameter particles. TG experiments indicated that the initial thermal weight loss temperatures of composite with the content of 2.5 wt% and 7.5% Fe 3 O 4 were increased by 7 and 16°C, compared with pure PUF. The degradation efficiency of toluene with magnetic PUF composite was much higher than that of pure PUF carrier, and the reason why the immobilization of microbial biomass of microorganisms on the magnetic PUF composite was much higher than that of the pure PUF. The prepared magnetic Fe 3 O 4 /PUF composite offered excellent thermal stability and medium paramagnetic properties. And this composite could not only increase the immobilized biomass of the microorganisms, but also enhance the COD removal efficiency of wastewater.

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“…Immobilizing microbiota B500 on macro-porous carriers enhances the removal efficiency for contaminants in wastewater (Park et al 2005 ). Iron-oxidizing bacteria immobilized onto polyurethane foam decrease the risk of membrane fouling and increase the efficiency of pollutants’ degradation (Zhou et al 2008 ).…”

Section: Introductionmentioning

confidence: 99%

Pseudomonas sp. LZ-Q continuously degrades phenanthrene under hypersaline and hyperalkaline condition in a membrane bioreactor system

Jiang

Huang

et al. 2015

Biophys Rep

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Graphical AbstractAbstractPhenanthrene is one of the most recalcitrant components of crude oil-contaminated wastewater. An efficient phenanthrene-degrading bacterium Pseudomonas sp. strain named LZ-Q was isolated from oil-contaminated soil near the sewage outlet of a petrochemical company. Pseudomonas sp. LZ-Q is able to degrade 1000 mg/L phenanthrene in Bushnell-Hass mineral salt medium. It also degrades other polycyclic aromatic hydrocarbons such as naphthalene, anthracene, pyrene, petrol, and diesel at broad ranges of salinities of 5 g/L to 75 g/L, pHs of 5.0–10.0, and temperatures of 10–42 °C. Therefore, Pseudomonas sp. LZ-Q could be a good candidate for remediation of polycyclic aromatic hydrocarbon (PAH)-contaminated wastewater. A membrane bioreactor (MBR) was applied to investigate the remediation ability of the strain LZ-Q. Wastewater containing phenanthrene with pH of 8, salinity of 35 g/L, and COD of 500 mg/L was continuously added to the system (HRT = 3 h). Results showed that Pseudomonas sp. LZ-Q is capable of degrading 96% of 20 mg/L phenanthrene and 94% of 500 mg/L COD for 60 days in a continuous mode. These results showed that the MBR system with strain LZ-Q might be a good approach for PAHs’ remediation in industrial wastewaters.

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Immobilization of Micro-Organism on Macroporous Polyurethane Carriers

Cited by 11 publications

References 15 publications

Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Assessment of biological trickling filter systems with various packing materials for improved wastewater treatment

Synthesis and characterization of novel magnetic Fe3O4/polyurethane foam composite applied to the carrier of immobilized microorganisms for wastewater treatment

Pseudomonas sp. LZ-Q continuously degrades phenanthrene under hypersaline and hyperalkaline condition in a membrane bioreactor system

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