Towards sustainable water disinfection with peracetic acid in aquaculture: A review

Abstract

Peracetic acid (PAA) has a long history as an efficacious and eco‐friendly disinfectant. It was first synthesised in 1902, and since then a wide range of applications has been developed in various industries. Aquaculture is a more recent industry wherein the potential of PAA is significant. As the global demand for sustainable development increases, there has likewise been growing interest in using PAA in aquaculture as an alternative to less environmentally friendly practices. PAA has no carcinogenic risk to humans (unlike formalin), has negligible harmful by‐products (unlike chlorine‐based disinfectants) and with appropriate precautions, the risks of causing severe human health damage is easier to control than ozone. Fish show strong physiological recovery and adaptation to PAA, whereas susceptible life stages of pathogens are highly vulnerable, enabling a safe and efficacious disinfection of the entire culture water and not the flow‐restricted disinfection by such processes as ultraviolet radiation or ozone. The effective concentration of PAA against many fish pathogens is usually below 2 mg L−1, which is tolerable for most fish, and it has very low environmental risk due to rapid degradation. However, such degradation and the hydrodynamics in production‐scale aquaculture systems complicate the practical use of PAA. In this review, we summarise key results of safe concentrations of PAA and its effectiveness specifically for fish farmers. We also outline major difficulties and possible solutions for practical uses of PAA. We intend to bring global attention to this compound and inspire future possibilities for its sustainable use as a water disinfectant in aquaculture.

Antiparasitic effects of peracetic acid on Striped Bass infested with Trichodina spp.

“…In a review publication, Lieke et al (2019) discussed the possibility that PAA could be an optimal treatment for velvet disease, which is caused by dinoflagellate parasites belonging to the genera Amyloodinium and Piscinoodinium. Liu et al (2024) discussed research publications in which PAA was shown to be effective against several ectoparasites. Several authors have studied the effectiveness of PAA for controlling Neoparamoeba perurans, the causative agent of amoebic gill disease in marine Atlantic Salmon Salmo salar (Lazado et al 2019(Lazado et al , 2022Furtado et al 2022), and Vannella spp., which are freshwater amoebae that Jensen et al (2020) irritans isolated from marine Gilthead Bream Sparus aurata to study the effectiveness of eight compounds, including PAA, in controlling the parasite.…”

“…A relatively new disinfectant to aquaculture that has been investigated with some success is the synergistic combination of peracetic acid (PAA) and hydrogen peroxide (H 2 O 2 ), commonly referred to as "PAA" in the industry. It is considered environmentally friendly because it decomposes into water, oxygen, and acetic acid and could potentially serve as a replacement for formalin (Madsen et al 2000;Pedersen and Henriksen 2011;Liu et al, 2024) if treatment methods are well defined.…”