Treatment of coal gasification wastewater by membrane bioreactor hybrid powdered activated carbon (MBR–PAC) system

Jia, Shengyong; Han, Hongjun; Hou, Baolin; Zhuang, Haifeng; Fang, Fang; Zhao, Qian

doi:10.1016/j.chemosphere.2014.09.085

Cited by 64 publications

(11 citation statements)

References 33 publications

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“…Based on the above discussions, it was difficult to attribute enhanced organic compounds removal to one single adsorption mechanism; another important explanation was that adsorption of organic molecules on GAC prolonged the reaction time for attached microbe degrading organics. Consequently it was speculated that the bioremoval process had the main effect, promoted by GAC addition, and this was consistent with a previous study …”

Section: Resultssupporting

confidence: 90%

“…Consequently it was speculated that the bioremoval process had the main effect, promoted by GAC addition, and this was consistent with a previous study. 4 On the basis of the results of Figs 2(b), 4(b) and 5(b), bio-augmented measures could enhance TPh removal, whereas there still existed some refractory phenolic compounds which could not be degraded and this might be attributed to less or absent corresponding enzyme for the residual phenols in the metabolism process.…”

Section: Influence Of Gacmentioning

confidence: 85%

“…In recent years, more and more coal energy industries in China have been developing advanced coal chemical technologies to cope with the increased demand for energy . Coal gasification was expected to become the promising technology for clean fuel such as methanol, alcohol and gas, however, the coal gasification wastewater (CGW) generated in the gas washing, condensing and purifying processes contains high concentrations of ammonia, cyanide, thiocyanate, phenolic compounds, polycyclic aromatic hydrocarbons, heterocyclic compounds and long‐chain hydrocarbons, which cause serious deterioration of the environment without adequate treatment. For CGW treatment, anaerobic hybrid aerobic processes have been applied, however, the secondary effluent is unable to satisfy reuse standards (main parameters COD < 60 mg L −1 and NH 4 + ‐N < 15 mg L −1 ), due to the high concentration of COD, total phenols (TPh, the main portion of COD) and NH 4 + ‐N.…”

Section: Introductionmentioning

confidence: 99%

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Bio-augmented submerged membrane bioreactor as an effective application for treatment of biologically pretreated coal gasification wastewater

Jia

Han

Zhuang

et al. 2015

J. Chem. Technol. Biotechnol.

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BACKGROUND Coal gasification wastewater (CGW) is the most important wastewater of the coal chemical industry and if disposed of without adequate treatment can cause serious environmental pollution. Membrane bioreactors (MBRs) have been widely used for high strength wastewater treatment; however, conventional MBRs potentially fail when the BOD/COD of the biologically pretreated CGW (BPCGW) is low. In the present study, strategies were employed to enhance MBR performance. RESULTS A long‐term bio‐augmented submerged membrane bioreactor (BSMBR) has been developed for treatment of BPCGW. With the optimal methanol dosage of 30%, hydraulic retention time (HRT) of 24 h, granular activated carbon (GAC) dosage of 5 g L−1 and NaHCO3 dosage ratio of 3:1 (amount NaHCO3 to NH4+‐N ratio, mol:mol), the concentrations of COD, total phenols and NH4+‐N reached 39, 23 and 11 mg L−1 with removal efficiencies of 74%, 40% and 46%, respectively. HRT of 24 h and GAC dosage of 5 g L−1 facilitated membrane fouling mitigation while the co‐metabolism process with methanol speeded up membrane fouling. High NaHCO3 dosage ratio (≥2:1) promoted nitritation‐type nitrification. CONCLUSION This study suggests that it is technically feasible to treat BPCGW by BSMBR, which can provide an environmentally acceptable way to further engineering application in coal chemical industries. © 2015 Society of Chemical Industry

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Section: Resultssupporting

confidence: 90%

Section: Influence Of Gacmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Bio-augmented submerged membrane bioreactor as an effective application for treatment of biologically pretreated coal gasification wastewater

Jia

Han

Zhuang

et al. 2015

J. Chem. Technol. Biotechnol.

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“…A laboratory-scale hybrid system coupling MBR with adsorption on powdered activated carbon (MBR-PAC) was developed to treat coal gasification wastewater. The dosage of PAC was 4 g dm -3 and the maximum removal efficiencies of COD (Chemical Oxygen Demand), total phenols and NH 4 + reached 93%, 99% and 63%, respectively [5]. A bench scale hollow fibre MBR (HF-MBR) was also utilized for treatment of the real wastewater of the Arak refinery, Iran.…”

Section: Introductionmentioning

confidence: 99%

Application of MBR technology for laundry wastewater treatment

Janus¹,

Mozia²,

Bering³

et al. 2017

Desalination and Water Treatment

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a b s t r ac tThe application of membrane bioreactor (MBR) for industrial laundry wastewater treatment is presented. An MBR pilot plant installation was used to test the efficiency of surfactants removal and the influence of treatment time on permeate flux. The installation consisted of (1) biological reactor (three tanks with a total capacity of 600 dm 3 ), (2) membrane reactor (ZeeWeed 10 membrane module, GE Water & Process Technologies), and (3) dosing station. The hourly flow rate of the wastewater to the biological reactor amounted to Q h = 25 dm 3 h -1 . The effluent from the bioreactor was periodically recycled back to the membrane reactor at Q h = 125 dm 3 h -1 . Despite periodical relaxation and backflush with permeate, after about 11 d of operation the membrane was fouled and chemical cleaning was necessary. The membrane permeability was fully recovered after the applied cleaning procedure. The total efficiency of removal of anionic and non-ionic surfactants was in the range of 87%-95% and 94%-95%, respectively. The COD removal reached 91%-93% and the BOD was almost completely eliminated (99%) indicating high MBR treatment efficiency of the applied industrial laundry wastewater.

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“…The biological advanced treatment technologies include mainly biological aerated filter and membrane bioreactor [2][3][4] . The physical-chemical advanced treatment technologies include coagulation, adsorption, membrane separation, advanced oxidation process (AOP), et al The biological treated PCCG wastewater still contains a large number of toxic and refractory compounds as well as their derivatives.…”

Section: Introductionmentioning

confidence: 99%

Pilot Study on Advanced Treatment of Wastewater Produced by Pressurized Coarse Coal Gasification

Zhang¹,

Xing²,

Zuo³

et al. 2015

Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Treatment of coal gasification wastewater by membrane bioreactor hybrid powdered activated carbon (MBR–PAC) system

Cited by 64 publications

References 33 publications

Bio-augmented submerged membrane bioreactor as an effective application for treatment of biologically pretreated coal gasification wastewater

Bio-augmented submerged membrane bioreactor as an effective application for treatment of biologically pretreated coal gasification wastewater

Application of MBR technology for laundry wastewater treatment

Pilot Study on Advanced Treatment of Wastewater Produced by Pressurized Coarse Coal Gasification

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