| In order to understand the effects of freshwater polyculture aquaculture ponds water quality on surrounding environment,
three ponds were selected in the Wuming country, which were Guangxi province's large freshwater fish center of the lead breeding. The research routinely monitored contents of TN, TP, chemical oxygen demand (CODMn), NH4+-N, DO, NO2--N concentrations in the water. With the Standards of 《Environmental Quality Standards for Surface of China》and 《Requirement for Water Discharge from Freshwater Aquaculture Pond》to evaluate the comprehensive water quality of aquaculture ponds and outfalls. The results indicated that the water quality of freshwater polyculture fish ponds in Wuming's country met the standard rate of Grade Ⅲ was 72.1%; The comprehensive water quality identification index of outfall was up to the standard Grade I of 《Requirement for Water Discharge from Freshwater Aquaculture Pond》. The study revealed that the pond culture water in Wuming country met the requirements of water environment function basically,
and the exclude wastewater of pond without pollution to the surrounding environment. |
