Integrated aerobic granular sludge and membrane process for enabling municipal wastewater treatment and reuse water production

Wang, Li; Liang, Wenzhong; Wen-song, Chen; Zhang, Wenxiang; Mo, Jiahao; Liang, Kaiguo; Tang, Bing; Zheng, Yi; Jiang, Feng

doi:10.1016/j.cej.2017.12.078

Cited by 32 publications

(6 citation statements)

References 39 publications

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“…Moreover, the formation of EPS impeded membrane performance via fouling. A three-stage system consisting of aerobic granular sludge reactor, an ultrafiltration unit, and a nanofiltration unit was studied by Wang et al [14]. The authors obtained removal efficiencies of 51.3%, 90.5%, and 99.3% for carbon, 53.6%, 94.8%, and 98.1% for nitrogen and 49.8%, 97.1%, and 98.7% for phosphorus, respectively.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Liquid Phase of Digestate from Agricultural Biogas Plant in a System with Aerobic Granules and Ultrafiltration

Świątczak

Cydzik‐Kwiatkowska

Zielińska

2019

Water

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Management of digestate from manure co-digestion with a very high chemical oxygen demand (COD) to nitrogen ratio and high nitrogen loads are a major bottleneck in the development of agricultural biogas plants. The liquid phase of digestate mixed with municipal wastewater was treated in aerobic granular sludge batch reactors at cycle lengths (t) of 6 h (GSBR6h), 8 h (GSBR8h), and 12 h (GSBR12h), corresponding to nitrogen loads of 1.6, 1.2, and 0.8 g/(L·d). Thauera sp., Lacibacter sp., Thermanaerothrix sp., and Planctomyces sp. predominated in granules favoring effective granule formation and nitrogen removal. Increasing cycle lengths (t) significantly decreased proteins in soluble fraction of extracellular polymeric substances (EPS) in granules and increased polysaccharides in tightly bound EPS that resulted in higher granule diameters and higher COD removal. In GSBR6h, heterotrophic nitrification/denitrification was very efficient, but ammonium was fully oxidized in the last hour of the cycle. So in further studies, the effluent from GSBR8h was subjected to ultrafiltration (UF) at transmembrane pressures (TMPs) of 0.3, 0.4, and 0.5 MPa. A GSBR8h-UF system (TMP of 0.4 MPa) ensured full removal of total Kjeldahl nitrogen (TKN), suspended solids, and substantial reduction of COD and color with good permeate flux. The NOx-rich (about 250 mg/L), clear permeate can be reused in line with assumptions of modern circular economy.

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Section: Introductionmentioning

confidence: 99%

Treatment of Liquid Phase of Digestate from Agricultural Biogas Plant in a System with Aerobic Granules and Ultrafiltration

Świątczak

Cydzik‐Kwiatkowska

Zielińska

2019

Water

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“…Finally, comparing the quality of the effluent obtained with reuse standards and literature data, we observed that the electrocoagulation process conjugated to fixed bed adsorption of activated carbon is an effective treatment method for the post-treatment of wastewater for various reuse purposes. Table 5 Summarized guidelines for water reuse from EPA [37] Parameter More restrictive class Less restrictive class pH 6,5-8,5 10,11,12 6-9 1,2,3,4,5,6,7,8,9 BOD (mg/L) ≤ 10 1,3,5 ≤ 30 2,4,6,7,8,9 Turbidity (NTU) ≤ 2 1,3,5,10,11,12 NA 2,4,6,7,8,9 Total Col. (MPN/100 mL) ND 1,3,5,10,11,12 < 200 2,4,6,7,8,9 TSS (mg/L) < 30 2,4,7,8,9 NA 1,3,5,6,10,11,12 TOC (mg/L) < 2 10,11,12 NA 1,2,3,4,5,…”

Section: Discussionmentioning

confidence: 99%

“…Industrial reuse in once-through cooling 9 Industrial reuse in recirculating cooling towers 10 Groundwater recharge by spreading into potable aquifers…”

Section: Discussionmentioning

confidence: 99%

“…Wastewater post-treatment techniques, including adsorption [4][5][6], membrane separation [7][8][9][10], electrolysis [11][12][13], ozonization [14,15] and other processes, have been highlighted as advanced wastewater treatment systems for reuse. Electrocoagulation (EC) is an environmentally interesting and efficient technology to remove a variety of pollutants (organic and inorganic).…”

Section: Introductionmentioning

confidence: 99%

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Electrocoagulation coupled adsorption for anaerobic wastewater post-treatment and reuse purposes

Pizutti¹,

Santos²,

Hemkemeier³

et al. 2019

Desalination and Water Treatment

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Water reuse is an indispensable reality in the search for an equilibrium between water resources and water scarcity. The recovery and production of reclaimed water with a guarantee of safety of use requires advanced treatment technologies. This study proposes a conjugated system, composed of electrocoagulation followed by adsorption, for the post-treatment of UASB effluent for reuse purposes. For this purpose, initially the electrocoagulation process (EC) was optimized using response surface methodology. The optimum conditions were for a current density of 29.44 A/m 2 and pH 6.0, with 44.58% of COD removal and energy consumption of 31.1 kWh per kg of COD removed. The EC effluent was treated by adsorption on a fixed bed column of activated carbon. The conjugated system provided the complete removal of COD and BOD, and significant removals of turbidity (96.5%), phosphorus (97.5%) and total and thermotolerant coliforms. The quality of the final treated water reached parameters for reuse according to EPA.

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“…Membrane filtration is an operation widely used to process soft particles as for example in waste water treatment 13,14 , and dairy filtration 15,16 . The biggest challenges are cake layer formation and membrane fouling 17,18 , in both cases, membranes lose part of their permeability and consequently the filtration process loses efficiency 19 .…”

Section: Introductionmentioning

confidence: 99%

Conformational changes influence clogging behavior of micrometer-sized microgels in idealized multiple constrictions

Meireles

Bouchoux

Schroën

2019

Sci Rep

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Clogging of porous media by soft particles has become a subject of extensive research in the last years and the understanding of the clogging mechanisms is of great importance for process optimization. The rise in the utilization of microfluidic devices brought the possibility to simulate membrane filtration and perform in situ observations of the pore clogging mechanisms with the aid of high speed cameras. In this work, we use microfluidic devices composed by an array of parallel channels to observe the clogging behavior of micrometer sized microgels. It is important to note that the microgels are larger than the pores/constrictions. We quantify the clog propensity in relation to the clogging position and particle size and find that the majority of the microgels clog at the first constriction independently of particle size and constriction entrance angle. We also quantify the variations in shape and volume (2D projection) of the microgels in relation to particle size and constriction entrance angle. We find that the degree of deformation increases with particle size and is dependent of constriction entrance angle, whereas, changes in volume do not depend on entrance angle.

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Integrated aerobic granular sludge and membrane process for enabling municipal wastewater treatment and reuse water production

Cited by 32 publications

References 39 publications

Treatment of Liquid Phase of Digestate from Agricultural Biogas Plant in a System with Aerobic Granules and Ultrafiltration

Treatment of Liquid Phase of Digestate from Agricultural Biogas Plant in a System with Aerobic Granules and Ultrafiltration

Electrocoagulation coupled adsorption for anaerobic wastewater post-treatment and reuse purposes

Conformational changes influence clogging behavior of micrometer-sized microgels in idealized multiple constrictions

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