A Southern Cross University study reported in July 2024 examined a woodchip bioreactor receiving horticultural runoff near Australia’s Coffs Coast. Originally installed to reduce nutrient losses, the system also lowered concentrations of several pesticides along the sampled flow path.
Researchers detected two insecticides and nine fungicides in soil below greenhouses, with at least six compounds decreasing through and below the bioreactor. The findings were published in Environmental Pollution. The team also identified limitations: some water-soluble pesticides appeared capable of passing through. The result supports targeted treatment and monitoring rather than treating a bioreactor as a universal solution to contaminated drainage.
