Co-digestion of municipal wastewater and microalgae biomass in an upflow anaerobic sludge blanket reactor

Gonçãlves, Ricardo Franci; Assis, Tatiana Izato; Maciel, Gabriela Boechat; Borges, Raquel Machado; Cassini, Sérvio Túlio Alves

doi:10.1016/j.algal.2020.102117

Cited by 24 publications

(16 citation statements)

References 55 publications

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“…The differences in the availability and activity of the microorganisms indicate that there is a higher probability that the same raw materials and techniques used to produce the WRW may not produce common species as the ones isolated in this study. [76][77][78][79][80][81][82][83][84]. The fermented WRW nutrient concentrations are generally within the range of the reported values obtained in the domestic and municipal wastewater and palm oil mill effluent (POME).…”

Section: Identification and Characterization Of The Bacterial Strainssupporting

confidence: 74%

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

et al. 2021

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The wastewater from washed rice water (WRW) is often recommended as a source of plant nutrients in most Asian countries, even though most current research on WRW lack scientific rigor, particularly on the effects of rice washing intensity, volumetric water-to-rice ratio (W:R), and condition of the WRW before plant application. This research was thus carried out: (1) to determine how various rice washing intensities, fermentation periods (FP), and W:R would affect the nutrient content in WRW, and (2) to isolate, identify, and characterize the bacterial community from fermented WRW. The WRW was prepared at several rice washing intensities (50, 80, and 100 rpm), FP (0, 3, 6, and 9 days), and W:R (1:1, 3:1, and 6:1). The concentrations of all elements (except P, Mg, and Zn) and available N forms increased with increasing FP and W:R. Beneficial N-fixing and P- and K-solubilizing bacteria were additionally detected in WRW, which helped to increase the concentrations of these elements. Monovalent nutrients NH4+-N, NO3−-N, and K are soluble in water. Thus, they were easily leached out of the rice grains and why their concentrations increased with W:R. The bacteria population in WRW increased until 3 days of fermentation, then declined, possibly because there was an insufficient C content in WRW to be a source of energy for bacteria to support their prolonged growth. While C levels in WRW declined over time, total N levels increased then decreased after 3 days, where the latter was most possibly due to the denitrification and ammonification process, which had led to the increase in NH4+-N and NO3−-N. The optimum FP and W:R for high nutrient concentrations and bacterial population were found to be 3 to 9 days and 3:1 to 6:1, respectively. WRW contained nutrients and beneficial bacterial species to support plant growth.

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Section: Identification and Characterization Of The Bacterial Strainssupporting

confidence: 74%

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

et al. 2021

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“…The increased TKN removal could be associated with greater bioaccumulation of nitrogen in sludge, thereby resulting in more TKN removal efficiency as compared to other reported studies. Another study conducted in 2020 reported TKN removal of 64% utilizing an anaerobic sludge blanket reactor for municipal wastewater [ 28 ]. Anaerobic processes mainly convert organic nitrogen into ammonium nitrogen, but the remaining conversion of ammonium is not as efficient because of the lack of processes such as nitrification and denitrification.…”

Section: Resultsmentioning

confidence: 99%

Feasibility Study of Anaerobic Baffled Reactor Coupled with Anaerobic Filter Followed by Membrane Filtration for Wastewater Treatment

Khan

Miran

et al. 2023

Membranes

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The performance of a Decentralized Wastewater Treatment System (DWTS) comprising an Anaerobic Baffled Reactor (ABR) and an Anaerobic Filter (AF) and Membrane Filtration (MF) module was studied for domestic wastewater treatment. The efficiency of the system was evaluated by running ABR at four different HRTs (14, 12, 10, and 8 h) resulting in COD removal efficiencies of 74, 72, 69, and 65%, respectively. The performance of AF using four different filtration media, i.e., PVC pipe (25 mm), PVC pipe (20 mm), PVC pipe (15 mm), and Kaldnes K3, was determined at optimized HRT (12 h). Among all the filtration media tested, the highest performance efficiency of the system was found with the PVC pipe (20 mm), which showed COD, TP, and TKN removal of 79, 32, and 63%, respectively. The efficacy of the system was proven via significant COD and turbidity removal of 94.6 and 87.2%, respectively, by the combined system.

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“…However, many studies reported that ACoD of SS and microalgae reduces the process performance and efficiency [175,177,180]. According to Goncalves et al [181] and Olsson et al [182], adding 20 w/w% and 40 w/w% microalgae as co-substrate decreased specific methane production by 5% and 26% compared to SS mono-digestion. Generally, data given in Table 7 reveals that the specific values of methane production from co-digestion of SS and microalgae can be up to 111% less than that of SS mono-digestion.…”

Section: Overall Process Performancementioning

confidence: 99%

Anaerobic co-digestion of sewage sludge with other organic wastes: A comprehensive review focusing on selection criteria, operational conditions, and microbiology

Azarmanesh¹,

Qaretapeh²,

Zonoozi³

et al. 2023

Chemical Engineering Journal Advances

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Co-digestion of municipal wastewater and microalgae biomass in an upflow anaerobic sludge blanket reactor

Cited by 24 publications

References 55 publications

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

Chemical and Microbial Characterization of Washed Rice Water Waste to Assess Its Potential as Plant Fertilizer and for Increasing Soil Health

Feasibility Study of Anaerobic Baffled Reactor Coupled with Anaerobic Filter Followed by Membrane Filtration for Wastewater Treatment

Anaerobic co-digestion of sewage sludge with other organic wastes: A comprehensive review focusing on selection criteria, operational conditions, and microbiology

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