Xử lý bùn thải của hệ thống xử lý nước thải thủy sản bằng biện pháp ủ phân compost trong điều kiện kỵ khí

Abstract

Sludge from aquaculture-wastewater treatment system is collected and treated by anaerobic composting method. The experiments were conducted by three treatments (C/N=25/1, C/N=30/1 and C/N=35/1) and replicated three times. In anaerobic condition of the temperature at 29-33.9 0C within about 12 weeks, the highest volume of biogas was about 663 liters at treatment C/N=30/1, the organic nitrogen fluctuated from 2.28 to 2.55%N and the total phosphor was 1.42 – 2.07 %P2O5. Although anaerobic method is time consuming and the efficiency of treating pathogens is lower than aerobic one, this is a good way to make use of organic sludge to produce biogas and organic fertilizer for agro-production. The result showed that treatment C/N=30/1 was the suitable one to apply in organic waste treatment.