Method for recycling glass substrate cleaning wastewater

The invention discloses a glass substrate cleaning wastewater recycling method, and belongs to the technical field of photoelectric display glass substrate cleaning wastewater treatment. A self-priming pump, an auxiliary pipeline and a valve are additionally arranged at the rear end of a water outlet pool, qualified cleaning wastewater is lifted to a cooling tower to be used, water used by the cooling tower is directly discharged into a sewage pipe network, and in order to avoid wastewater treatment system faults, wastewater treatment does not reach the standard, and then unqualified wastewater is discharged into the sewage pipe network. A backflow pipeline is specially designed at the water outlet position of the self-priming pump to the adjusting tank, if the pH of the water outlet tank is unqualified, a backflow valve is opened, a cooling tower water replenishing valve is closed, and unqualified wastewater is lifted to the adjusting tank for retreatment. At the moment, a water supplementing source of the c