Research on Using the Sludge of Food Processing Sludge Factory to Compost Combined with Rice Straw and Water Hyacinth

This work illustrates that the co-composting of food processing sludge (FPS) combined with rice straw (RS) and water hyacinth (WH) with Trichoderma enriches decomposition process. The objective is to make use of organic fertilizer and reduce environmental pollution. All treatments are randomly designed with five treatments including (1) FPS, (2) FPS+RS, (3) FPS+WH, (4) FPS+RS+N, (5) FPS+WH+N with the rate C/N=25 and is composted in 60 days. The results show that FPS combined with RS/WH treatment has higher nutritional content than non-combined with significant differences(p<0.05). Trichoderma helps to enhance decomposition process and shortens the compost maturity period. The targets of heavy metals in FPS lower than TCN10526-2002 and nutrient components TKN, TP, TK increase at the end of the experiment and FPS can be used combined with RS/WH as a source of organic fertilizer