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Technical Note

Real-Time Determination of Total Solids in UASB Reactors Using a Single Emitter Ultrasonic Sensor

1
DESA, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil
2
Lamp-Ion B.V., 8472 CL Wolvega, The Netherlands
3
YNOVIO B.V., 8939 EG Leeuwarden, The Netherlands
4
Water Technology Research Group, NHL Stenden University of Applied Sciences, Rengerslaan 8-10, 8917 DD Leeuwarden, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editors: Qilin Wang, Dongbo Wang, Yingqun Ma, Jing Sun and Li Gao
Water 2021, 13(11), 1437; https://doi.org/10.3390/w13111437
Received: 21 April 2021 / Revised: 13 May 2021 / Accepted: 14 May 2021 / Published: 21 May 2021
(This article belongs to the Special Issue Innovative Technologies for Wastewater and Water Treatment)
The lack of proper sludge withdrawal routines has been one of the main causes of solids washout and consequent deterioration of effluent quality from up-flow anaerobic sludge blanket (UASB) reactors treating sewage in developing countries. The establishment of an adequate sludge withdrawal routine depends on the knowledge of the sludge mass inside the reactor, but for this, it is necessary to continuously monitor the solid’s profile along the height of the digestion compartment of such reactors. Knowing the sludge concentration at the highest point of this compartment, immediately before the passage of the liquid to the settling compartment, allows the definition of more robust strategies for sludge discharge, in order to not exceed the retention capacity (storage) of solids in the reactor. To couple with that, a low-cost ultrasound sensor was developed and tested with the aim of monitoring total solids concentration inside UASB reactors. Bench and demo-scale tests were performed to validate the developed technology. Results have shown that the sensor can provide real-time values of total solids inside the reactor with 0.1% accuracy up to 1% total solids content. View Full-Text
Keywords: anaerobic reactors; ultrasound sensor; total solids; waste-water treatment anaerobic reactors; ultrasound sensor; total solids; waste-water treatment
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MDPI and ACS Style

Neves, P.N.P.; Azevedo, L.S.; Hoep, M.; Bressani-Ribeiro, T.; Wiersma, M.; Ferreira, R.N.; Wagterveld, R.M.; Yntema, D.; Chernicharo, C.A.L.; Agostinho, L.L.F. Real-Time Determination of Total Solids in UASB Reactors Using a Single Emitter Ultrasonic Sensor. Water 2021, 13, 1437. https://doi.org/10.3390/w13111437

AMA Style

Neves PNP, Azevedo LS, Hoep M, Bressani-Ribeiro T, Wiersma M, Ferreira RN, Wagterveld RM, Yntema D, Chernicharo CAL, Agostinho LLF. Real-Time Determination of Total Solids in UASB Reactors Using a Single Emitter Ultrasonic Sensor. Water. 2021; 13(11):1437. https://doi.org/10.3390/w13111437

Chicago/Turabian Style

Neves, Priscilla N.P., Lariza S. Azevedo, Martijn Hoep, Thiago Bressani-Ribeiro, Matthijs Wiersma, Ronaldo N. Ferreira, R. M. Wagterveld, Doekle Yntema, Carlos A.L. Chernicharo, and Luewton L.F. Agostinho 2021. "Real-Time Determination of Total Solids in UASB Reactors Using a Single Emitter Ultrasonic Sensor" Water 13, no. 11: 1437. https://doi.org/10.3390/w13111437

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