... washing raw material and products, cleaning of machines, containers or flushing the working floor, de-icing, thawing and salt soaking. All the water used is later discharged as wastewater. The ... pangasius farming, one of the most common voiced environmental concerns of pangasius farming, and one that is gaining increasing attention in policy and practice, is the discharge of wastewater ... system analysis, technology assessment and governance analysis for increasing sustainability of fish production in the Mekong delta of Vietnam. 143 i Mitigating water pollution in...