Aerobic granular sludge culture method

Abstract

The invention relates to an aerobic granular sludge culture method. The aerobic granular sludge culture method comprises the following steps of 1, inoculating a sequencing batch reactor with activated sludge, 2, adjusting a pH value of petrochemical wastewater to be treated by sulfuric acid and pumping the petrochemical wastewater with an adjusted pH value into the reactor, 3, carrying out aeration by an aeration device laid on the bottom of the reactor so that the activated sludge and the petrochemical wastewater are mixed and undergo a full reaction, 4, stopping aeration and carrying standing for sludge-water separation, and 5, discharging a certain amount of water by a water outlet of the reactor and periodically repeating the steps of 2 to 5 in the reactor. The aerobic granular sludge culture method utilizes the petrochemical wastewater to carry out aerobic granular sludge culture. The cultured aerobic granular sludge has salt resistance, impact resistance and high-density organic load resistance, can be directly used for treatment on high-salt, high-COD and strong basic petrochemical wastewater, solves the bottleneck problem of use of aerobic granular sludge in petrochemical wastewater treatment and further widens an aerobic granular sludge technology application scope.

Description

technical field [0001] The invention relates to the technical field of aerobic biochemical treatment of sewage, in particular to a method for cultivating aerobic granular sludge. It is especially suitable for the cultivation method of aerobic granular sludge with high salt, high COD and strong alkaline petrochemical wastewater. Background technique [0002] Aerobic biochemistry is a widely used sewage biochemical treatment technology at present, and activated sludge is the main body of aerobic biochemistry. However, in the process of biochemical treatment of petrochemical wastewater, people found that the traditional activated sludge process often has the disadvantages of sludge not easy to coagulate, poor settling, increased suspended matter in effluent, and reduced treatment effect. Aerobic granular sludge technology (Aerobic Granular Sludge, AGS) is a new type of microbial self-immobilization technology developed in recent decades. It is a granular microbial self-aggrega...

AI Technical Summary

Problems solved by technology

[0010] (3) The salt content in the test wastewater was low, and the effect of salinity on the formation of aerobic granular sludge was not fully considered;

[0011] (4) The short-cycle SBR (2.5-6h) process is used to cultivate aerobic granular sludge, which does not meet the actual treatment of petrochemical wastewater

[0012] It can be seen that there is no effective method for the cultivation of aerobic granular sludge for petrochemical wastewater.

Images