Title
Chemical-free biologically enhanced primary treatment of raw wastewater for improved capture carbon
Document Type
Journal Article
Publication Title
Water (Switzerland)
Volume
14
Issue
23
Publisher
MDPI
School
School of Engineering
Funders
Water Corporation
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
This work is licensed under a Creative Commons Attribution 4.0 License.
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