Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

Wu, Peng; Qi, Peng; Xu, Lu; Wang, Jianfang; Huang, Zhenxing; Zhang, Jiachao; Shen, Yun

doi:10.1080/19443994.2015.1048741

Cited by 9 publications

(1 citation statement)

References 25 publications

(32 reference statements)

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“…Also, the temperature has a significant effect on reactor treatment efficiency. Researchers [24–26] had shown that treatment efficiencies of the ABR deteriorated significantly when the temperature dropped below 15°C. To overcome temperature effects, decreasing hydraulic retention times (HRT) or heating of wastewater could achieve higher removal efficiency [12], which also involves cost and energy.…”

Section: Introductionmentioning

confidence: 99%

A simplistic approach of algal biofuels production from wastewater using a Hybrid Anaerobic Baffled Reactor and Photobioreactor (HABR-PBR) System

et al. 2019

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The current technologies of algal biofuels production and wastewater treatment (e.g., aerobic) process are still in question, due to the significant amount of fresh water and nutrients requirements for microalgae cultivation, and negative energy balance in both processes, especially when considered in the context of developing counties around the world. In this research, a simplistic sustainable approach of algal biofuels production from wastewater was proposed using a Hybrid Anaerobic Baffled Reactor (HABR) and Photobioreactor (PBR) system. The study suggests that the HABR was capable of removing most of the organic and solid (>90% COD and TSS removal) from wastewater, and produced a healthy feedstock (high N: P = 3:1) for microalgae cultivation in PBRs for biofuels production. A co-culture of Chlorella vulgaris, Chlorella sorokiniana, and Scenedesmus simris002 showed high lipid content up to 44.1%; and the dominant FAMEs composition (C16-C18) of 87.9% in produced biofuels. Perhaps, this proposed low-cost technological approach (e.g., HABR-PBR system) would connect the currently broken link of sustainable bioenergy generation and wastewater treatment pathway for developing countries.

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Section: Introductionmentioning

confidence: 99%

A simplistic approach of algal biofuels production from wastewater using a Hybrid Anaerobic Baffled Reactor and Photobioreactor (HABR-PBR) System

et al. 2019

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Biochar carrier application for nitrogen removal of domestic WWTPs in winter: challenges and opportunities

Ding

Wang

et al. 2018

Appl Microbiol Biotechnol

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Biofilm processes have a better nitrogen removal ability than traditional activated sludge at low temperatures (< 15 °C). Many biofilm processes, as well as integrated biofilm and activated sludge processes, are potential and realizable nitrogen removal upgrading methods for domestic wastewater treatment plants (WWTPs). Therefore, biofilm packing material is attractive for domestic WWTP upgrading and reconstruction in winter. For a half decade, researchers have successfully applied activated carbon to biochar as biofilm carrier in the wastewater treatment field. Biochar, as a biostable soil amendment with pores and crevices on its surface, has been applied in the soil-plant system, which promoted the adsorption of NH and NO, decreased NO emission, transcriptional level of narG, nxrA, and nirS, and changed the microbial community composition for better nitrogen removal. However, in the field of wastewater treatment, the study of biochar-packed process is merely in the laboratory stage of simulated wastewater, which deserves further research in the future. In this mini review, we will discuss the performances of different processes at low temperatures, the related mechanism of the biochar-packed process for nitrogen removal, and other potential applications of biochar carriers.

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A new energy-positive technological approach for wastewater treatment and bioenergy generation using a photo anoxic baffled reactor (PABR)

Hasan

Khalekuzzaman

Alamgir

et al. 2021

Int. J. Environ. Sci. Technol.

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This study proposed a new energy-positive technological approach for wastewater treatment and bioenergy generation using an algal–bacterial symbiosis system in a photo anoxic baffled reactor (PABR). The PABR consisted of a sedimentation chamber, four regular baffled chambers, and two floated filter media chambers. The PABR was operated in the presence of natural sunlight with an average intensity of 30 µmoles/m2/s. A wide range of ORP (−215 to 255 mV) data suggested that a suitable environment condition existed in the PABR for photosynthesis, nitrification, and denitrification. Simultaneous nitrification/denitrification (SND) was observed in the first three chambers, and microbial assimilation was governed in the last four chambers. An average biochemical oxygen demand (BOD), NH3–N, total nitrogen (TN), and PO43− removal efficiencies were more than 88, 48, 36, and 42%, respectively. Moreover, hydrothermal liquefaction (HTL) was carried out for sludge and microalgae samples for bioenergy (e.g., biocrude and biochar) conversion, where the sludge sample containing microalgae and bacteria was collected from PABR and microalgae sample was collected from photobioreactor. Finally, the Fourier transform infrared spectroscopy (FTIR) analysis was done for both biocrude and biochar derived from sludge and microalgae samples, and it was suggested that the biocrude and biochar derived from sludge sample were better than that of microalgae sample.

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Effects of temperature on nutrient removal performance of a pilot-scale ABR/MBR combined process for raw wastewater treatment

Cited by 9 publications

References 25 publications

A simplistic approach of algal biofuels production from wastewater using a Hybrid Anaerobic Baffled Reactor and Photobioreactor (HABR-PBR) System

A simplistic approach of algal biofuels production from wastewater using a Hybrid Anaerobic Baffled Reactor and Photobioreactor (HABR-PBR) System

Biochar carrier application for nitrogen removal of domestic WWTPs in winter: challenges and opportunities

A new energy-positive technological approach for wastewater treatment and bioenergy generation using a photo anoxic baffled reactor (PABR)

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