Water reuse: &gt;90% water yield in MBR/RO through concentrate recycling and CO2 addition as scaling control

Joss, Adriano; Baenninger, Claudia; Foa, Paolo; Koepke, S.; Krauß, Martin; McArdell, Christa S.; Rottermann, Karin; Wei, Yuansong; Zapata, A.; Siegrist, Hansruedi

doi:10.1016/j.watres.2011.09.011

Cited by 68 publications

(29 citation statements)

References 30 publications

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“…The permeability of the NF decreased in the initial period, and this was primarily attributed to an increase in the salt concentration, which will be discussed in the following section. The water yield of the pilot MBR-NF was over 92 ± 5.6% for the stable period, similar to Joss's (Joss et al, 2011) study of MBR-NF for treating municipal wastewater. Fig.…”

Section: Resultssupporting

confidence: 82%

“…In view of the advantages of MBR and RO/NF, dual membrane systems of MBR and RO or NF have recently received attention as promising alternative treatments for trace organic pollutants removal or water recycling (Alturki et al, 2010;Joss et al, 2011). However, most of the systems have been used for treating municipal wastewater because of the excellent water quality of the MBR effluent, and there are few reports on the direct use of the dual membrane system for treating industrial wastewater to meet stringent discharge standards or reuse.…”

Section: Introductionmentioning

confidence: 99%

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Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

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h i g h l i g h t sMBR-NF with NF concentrate recycling was tested for antibiotic-wastewater treatment. The system was effective for antibiotic production wastewater treatment and reuse. The MBR-NF process resulted in excellent water quality and a high water yield of 92%. Organic pollutants in the wastewater were almost completely retained by the NF. a r t i c l e i n f o b s t r a c tA double membrane system comprising a membrane bioreactor (MBR) combined with a nanofiltration (NF) membrane was investigated on a pilot scale for the treatment of antibiotic production wastewater over a three-month period at a pharmaceutical company in Wuxi, China. By recycling the NF concentrate, the combined MBR-NF process was shown to be effective for the treatment of antibiotic production wastewater, resulting in excellent water quality and a high water yield of 92 ± 5.6%. The water quality of the pilot-scale MBR-NF process was excellent; e.g., the concentrations of TOC, NH 4 + -N, TP were stable at 5.52, 0.68, 0.34 mg L À1 , respectively, and the values of turbidity and conductivity of the NF permeate were 0.15 NTU and 2.5 mS cm À1 , respectively; these values meet China's water quality standard requirements for industrial use (GB21903-2008). Not only were the antibiotic removal rates of spiramycin (SPM) and new spiramycin (NSPM) over 95%, the acute toxicity was also drastically reduced by the MBR-NF pilot system. The main organics in the MBR effluent were proteins, polysaccharides, and humic-like substances; they were almost completely retained by the NF membrane and further biodegraded in the MBR because the NF concentrate was recycled. The microbial community of the MBR did not significantly change with the recycling of the NF concentrate.

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Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Jianxing

Wei

et al. 2015

Chemosphere

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“…S2, SI) implied a morphological change at the R cb of 90 %, which supported the conclusion that the high salinity in NF concentrate caused negative impact on sludge microbes. Results and discussions above demonstrated that salinity brought by the NF concentrate is the key factor affecting the sludge activity, especially at a high R cb , which is consistent with the conclusions of other researchers (Joss et al 2011;Kappel et al 2014). …”

Section: Sour and Mlvss/mlss Ratiosupporting

confidence: 91%

“…To improve treatment efficiency and water recovery of the system, Rautenbach and Mellis (1994) made the first attempt who returned the NF concentrate back to the bioreactor for the advanced treatment of landfill leachate. The high salinity of NF concentrate flowed back to the MBR will inevitably cause the increase of salinity in the long term, which would influence the sludge characteristics and membrane fouling of MBR as demonstrated by other researchers (Joss et al 2011;Kappel et al 2014). Nevertheless, the effect of NF concentrate at diffident backflow ratios (R cb s) remains unclear while the suitable VRF for NF concentrate also needs some attention.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Effects of returning NF concentrate on the MBR-NF process treating antibiotic production wastewater

Cheng

Jianxing

et al. 2016

Environ Sci Pollut Res

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The optimization of the nanofiltration (NF) concentrate backflow ratio (R cb ) and the influence of the NF concentrate on the performance of membrane bioreactornanofiltration (MBR-NF) process treating antibiotic production wastewater were investigated on a laboratory scale. The R cb was optimized at 60 % based on the removal rates of chemical oxygen demand (COD) and NH 4 + -N by MBR. Data analyses indicated that salinity brought by NF concentrate is the major driver leading to the decrease of sludge activity, especially at a high R cb . EPS analysis showed that electric conductivity (EC), proteins in soluble microbial products (SMP), and SMP brought by NF concentrate are the dominant factors causing the severe membrane fouling in MBR. Furthermore, undegradable substances including fulvic acid-like and humic acid-like compounds accumulated in NF concentrate showed significant influence on fouling of NF. MBR could well degrade small MW compounds in NF concentrate, which confirmed the enhancement of organic removal efficiency by recycling the NF concentrate to MBR. The MBR-NF process showed a relatively stable performance at the R cb of 60 % (volume reduction factor (VRF) = 5), and the NF permeate could satisfy the water quality standard for fermentation process with a water recovery rate of 90.9 %.

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“…The selection of minerals to include in a model is typically based on prior experience (Musvoto et al 2000a), and/or on equilibrium predictors (e.g. saturation indices) which quantify an extent of supersaturation for particular minerals based on aqueous phase composition (Barat et al 2011, Joss et al 2011b). Neither of these methods can fully guarantee a reliable selection of minerals to include in a model.…”

Section: Minerals Precipitation Modelling Approachmentioning

confidence: 99%

Dynamic modelling of minerals precipitation in wastewater treatment

Mbamba¹

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In wastewater treatment, there is an increasing focus on nutrient and energy recovery and a reduction in energy consumption to counter climate change. Because of this, integrated mathematical modelling platforms are required to support plant-wide developments making use of emerging, resilient and environmental-friendly technologies. A reliable model description of a wastewater treatment plant should include both biology and physico-chemistry. However, existing standard models used across the wastewater sector have a biological focus with over-simplified descriptions of important physicochemistry, especially with minerals precipitation which is a very important class of physicochemical reactions.As part of development of a more widely applicable physicochemical framework, this thesis sought to identify a suitable minerals precipitation modelling approach that could give reasonable results in mainstream use with wastewater treatment. This research aim was approached in three steps. Firstly a review of available modelling approaches suggested a simple equilibrium kinetic-based modelling approach could be feasible. This approach was then validated in a simple system of calcite in synthetic solutions using pH titration experiments with the reliable Constant Composition Method (CCM).Further statistical analysis focused on clarifying key environmental factors that influence calcite precipitation to determine whether these are necessary to include in a model. Secondly, the proposed model approach was further tested on different types of wastewater and for multiple parallel precipitation reactions. Experiments included dynamic titration or aeration with synthetic wastewater and real wastewater. Thirdly, the general physicochemical modelling approach was implemented in a plant-wide platform together with standard biological models, namely activated sludge model No 2 (ASM2d) and Anaerobic Digestion Model No. 1 (ADM1). The plant-wide model evaluation compared simulations with real data from a full-scale wastewater treatment plant, and used steadystate, dynamic and scenario analyses to test the model performance.Experimental evidence for calcite precipitating in synthetic aqueous solutions, suggested that minerals precipitation kinetics could be reliably described with a 1 st order dependency on mineral Further testing for multi-species systems in real wastewater indicated that precipitation was dominated by the mineral struvite, forming together with varied and minor amounts of calcium phosphate and some calcium carbonate. Kinetic rate coefficients (kcryst), which were statistically fitted, were generally in the range 0.35-11.6 h -1 with 95% confidence intervals of 10-80% relative.The results confirmed that the baseline model approach provided a statistically good fit of measured pH, dissolved calcium, magnesium, total inorganic carbon and phosphate. With this application, the precipitation modelling approach offered the advantage of only requiring a minimal number of empirical fitted parameters (kcryst values), res...

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Water reuse: >90% water yield in MBR/RO through concentrate recycling and CO2 addition as scaling control

Cited by 68 publications

References 30 publications

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Performance and fate of organics in a pilot MBR–NF for treating antibiotic production wastewater with recycling NF concentrate

Effects of returning NF concentrate on the MBR-NF process treating antibiotic production wastewater

Dynamic modelling of minerals precipitation in wastewater treatment

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