Rural domestic breeding mixed sewage treatment integrated system

[0029] Example 1

[0030] The integrated system of the present invention is used to treat mixed domestic sewage from a certain village in Shangguan Town, Dali City, Yunnan Province. The daily processing capacity is 55t, the hydraulic retention time in contact with the anaerobic tank is 36h, and the surface load of the single-stage gravel bed is 0.772m 3 / (m 2 ·D), the empty bed residence time is 22.5h, and the surface compound of the natural aeration soil purification tank is 0.125m 3 / (m 2 ·D), the pool depth is 0.8m. Influent water quality is COD1494.50mg / L, TN156.90mg / L, TP11.45mg / L, effluent COD is 23.67mg / L, TN is 2.54mg / L, TP is 0.42mg / L, for COD, TN and TP The removal rates were 98.4%, 98.4% and 96.3%, respectively.

[0031] Example 2

[0032] The integrated technology of the present invention is used to treat mixed domestic sewage from a certain village in Shangguan Town, Dali City, Yunnan Province. The daily processing capacity is 40t, the hydraulic retention time in contact with the anaerobic tank is 36h, and the surface load of the single-stage gravel bed is 0.581m. 3 / (m 2 ·D), the empty bed residence time is 30.9h, and the surface compound of the natural aeration soil purification tank is 0.122m 3 / (m 2 ·D), the pool depth is 0.8m. Influent water quality is COD2059.30mg / L, TN195.36mg / L, TP15.21mg / L, effluent COD is 36.95mg / L, TN is 9.65mg / L, TP is 0.39mg / L, for COD, TN and TP The removal rates were 98.2%, 95.1% and 97.4%, respectively.