Document Type

Journal Article

Publication Title

Water (Switzerland)

Volume

14

Issue

23

Publisher

MDPI

School

School of Engineering

Funders

Water Corporation

Comments

Azhar, M. R., Nolan, P., Cadee, K., & Khiadani, M. (2022). Chemical-free biologically enhanced primary treatment of raw wastewater for improved capture carbon. Water, 14(23), Article 3825. https://doi.org/10.3390/w14233825

Abstract

Conventional wastewater treatment processes require extensive energy inputs for their operations. Biologically enhanced primary treatment (BEPT) is a promising technology to capture incoming organics that may be utilized to produce biogas and potentially hydrogen with further downstream processing. This study involved a biologically enhanced primary treatment (BEPT) of raw wastewater at bench and pilot-scale using activated sludge (AS) addition and dissolved air flotation (DAF) using raw wastewater at a municipal wastewater facility in Western Australia with average chemical oxygen demand of ~ 800 mg/L. The results of pilot-scale testing showed an improved removal performance for total chemical oxygen demand (COD-T), soluble chemical oxygen demand (COD-S), and total suspended solids (TSS) compared to conventional primary treatment (PT). Specifically, average COD-T, COD-S and TSS removals for BEPT were 33.3 %, 13.5 % and 45 %, respectively which was 10 %, 100 % and 6 % higher than PT. Moreover, the sludge produced from BEPT had a high solids content of 4.8 g/L, which might not need further thickening prior to anaerobic digestion. It is important to note that no chemicals were used during BEPT testing, which makes the process very cost-effective.

DOI

10.3390/w14233825

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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