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Waste-to-Value Innovation in the Pet Care Industry: Transforming Soybean By-Products into Sustainable Cat Litter

Author(s) Qinghua Siluo
Country Australia
Abstract This paper analyzes the viability of valorising a by-product of tofu/soybeverage okara, a significant by-product named Mr. Okara, as a new cat litter material as part of a waste-to-value system and a circular economy. The review of evidence summarises the data on the composition of residues (high initial moisture fibre-rich and protein-rich), processing routes needed to stabilize the product (drying, particle-size control, granulation, and hygiene protection), and functional performance expectations, such as the absorption and liquid retention, clumping stability, and dust ability. Compared to mineral litters, the residue-based systems have a potential to lessen reliance on extractive input and allow landfill diversion although net sustainability benefits will be dependent on energy efficient drying and feasible end-of-life treatment of biologically contaminated used litter. Life-cycle considerations are referred to define major motivators of carbon footprint and resource efficiency such as allocation options of by-product load and scenario sensitivity across disposal paths. The implications of the industry are presented in terms of scalable sourcing in and about soy-processing hubs, quality-control requirements to handle variability of feedstock, and economic logic of prevented residue disposal and possible differentiation of products. Altogether, soybean residue demonstrates plausible prospects as a bio-based litter substrate in case the processing is optimized to match the safety and performance criteria without compromising a positive environmental image of the sustainability-focused pet care markets (Oyedeji et al., 2024; Karim et al., 2025; Aduba et al., 2025).
Keywords Soybean residue (okara) Cat litter materials, Waste-to-value, Circular economy, Life-cycle assessment, Sustainable pet care products.
Published In Volume 7, Issue 1, January 2026
Published On 2026-01-26
DOI https://doi.org/10.70528/IJLRP.v7.i1.1923
Short DOI https://doi.org/hbmh2z
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