Treatment method and treatment device for scums in milk industry wastewater

Abstract

The invention relates to a treatment method and a treatment device for scums in milk industry wastewater. The invention provides the treatment method and the treatment device for the scums in the milk industry wastewater; the treatment method is not influenced by the water level of an adjusting tank and treats the scums in the milk industry wastewater with a combination process; and a system can stably run for a long term. The treatment device for the scums in the milk industry wastewater comprises the adjusting tank and a sludge tank. The treatment device is structurally characterized by further comprising a communication pipe with two ends arranged in the adjusting tank and the sludge tank respectively; a pipe opening, in the adjusting tank, of the communication pipe is higher than that, in the sludge tank, of the communication pipe; a residual sludge feeding pipe, a digested sludge discharging pipe, a lifting pump and an aeration pipeline are arranged in the sludge tank; an air inlet pipe, a water inlet pipe and an air-water mixing device are arranged in the adjusting tank; the water inlet pipe and the air inlet pipe are connected with the input end of the air-water mixing device; the output end of the air-water mixing device is connected with a stirring pipe; and a valve is arranged on each of the air inlet pipe and the water inlet pipe.

Description

technical field [0001] The invention relates to a treatment method and a treatment device for dairy wastewater scum. Background technique [0002] The existing dairy wastewater treatment is mainly based on biochemical methods, such as "adjustment pool + hydrolysis pool + anaerobic system + aerobic system" or "regulation pool + hydrolysis pool + intermediate pool + anaerobic system + aerobic system", in The adjustment tank and the hydrolysis tank use the perforated tube air stirring device to stir the tank body. Using this method to stir the adjustment tank or the hydrolysis tank has the following disadvantages: 1. The adjustment tank and the hydrolysis tank are anoxic, and a large amount of air is brought in by the perforated tube agitation. The stirring device cannot be operated for a long time, which is not conducive to the operation of the system; 2. The milk fat and milk protein in the dairy wastewater will be acidified and floated within 3-4 hours, resulting in scum, wh...

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Problems solved by technology

[0002] The existing dairy wastewater treatment is mainly based on biochemical methods, such as "adjustment pool + hydrolysis pool + anaerobic system + aerobic system" or "regulation pool + hydrolysis pool + intermediate pool + anaerobic system + aerobic system", in The adjustment tank and the hydrolysis tank use the perforated tube air stirring device to stir the tank body. Using this method to stir the adjustment tank or the hydrolysis tank has the following disadvantages: 1. The adjustment tank and the hydrolysis tank are anoxic, and a large amount of air is brought in by the perforated tube agitation. The stirring device cannot be operated for a long time, which is not conducive to the operation of the system; 2. The milk fat and milk protein in the dairy wastewater will be acidified and floated within 3-4 hours, resulting in scum, which accumulates in a large amount in the regulating tank, reducing the The regulating tank adjusts the capacity of the tank, and it is not easy to clean up; because the regulating tank and the hydrolysis tank have a large amount of scum and a large amount of sediment deposited on the bottom of the tank body, the air perforated aeration pipe is prone to blockage, which increases the workload of system maintenance; 3 . The adjustment tank is operated with variable water level. When the liquid level is low, the scum will enter the anaerobic system with the sewage, which will impact the anaerobic system. sludge bulking), resulting in substandard effluent

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