Strategies for cost-optimized biocement production: a comprehensive review.

Biocement is a promising alternative to conventional cement, offering advantages in sustainability and reducing carbon footprints. However, its widespread adoption has been hindered by the relatively high production costs. This review aims to explore various strategies and advancements in biocement production that can contribute to cost reduction. Specifically, we discuss the selection of low-cost microbial growth media for microbially induced carbonate precipitation (MICP), the utilization of plant extractives as enzyme substitutes in enzyme-induced carbonate precipitation (EICP), the substitution of urea with urine as a low-cost source of nitrogen, the exploration of affordable alternatives to calcium ions, and the valorization of ammonia/ammonium byproducts, and other pathways. The adoption of these strategies could significantly enhance biocement's scalability and sustainability, paving the way for more eco-friendly and cost-effective construction practices.