Treatment process of waste water of dairy products

Abstract

The invention relates to the technical field of waste water treatment, in particular to a treatment process of waste water of dairy products, which comprises the following steps: firstly, removing floating materials in the waste water of the dairy products through a grid channel, and then carrying out primary treatment on the waste water through a regulating pond; degrading the waste water after primary treatment through an anaerobic baffled reactor (ABR), discharging the sludge obtained by degrading the waste water through the ABR into a sludge tank, and then pumping and transporting the sludge outward; discharging the waste water after ABR degradation into a middle sedimentation tank for solid-liquid separation, and discharging the waste water after separation in the middle sedimentation tank into an aerobic tank; then, aerating and degrading the waste water in the aerobic tank, and discharging the waste water after aeration treatment into a secondary sedimentation tank; and finally, carrying out solid-liquid separation on the waste water in the secondary sedimentation tank, and discharging the separated waste water after reaching standards. Thus, the treatment process of thewaste water of the dairy products, which is provided by the invention, has small discharge amount of the sludge and high treatment efficiency of the waste water.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a dairy wastewater treatment process. Background technique [0002] At present, dairy products such as yogurt, fresh milk, pure milk, and milk powder have entered thousands of households at home and abroad, and have become indispensable nutrients for many people. However, there will be a certain amount of wastewater discharged during the processing of dairy products, mainly from bottled water. , brush irrigation, flushing water, etc. These wastewaters contain a large amount of easily degradable substances, which can easily cause environmental pollution after discharge. [0003] In the prior art, physical and chemical methods such as air flotation, coagulation sedimentation, adsorption, etc. are first used to pretreat the wastewater, so that the milk solids in the wastewater such as milk fat, casein and other milk proteins, lactose, and inorganic salts are removed fro...

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Problems solved by technology

[0002] At present, dairy products such as yogurt, fresh milk, pure milk, and milk powder have entered thousands of households at home and abroad, and have become indispensable nutrients for many people. However, there will be a certain amount of wastewater discharged during the processing of dairy products, mainly from bottled water. , brush irrigation, flushing water, etc. These wastewater contain a large amount of easily degradable substances, which can easily cause environmental pollution after discharge

[0003] In the prior art, physical and chemical methods such as air flotation, coagulation sedimentation, adsorption, etc. are first used to pretreat the wastewater, so that the milk solids in the wastewater such as milk fat, casein and other milk proteins, lactose, and inorganic salts are removed from the wastewater. separated, and then use the upflow anaerobic sludge bed reactor (UASB reactor) combined with aerobic biochemical aerobic process to further treat the wastewater, because the pretreatment steps adopted in the wastewater treatment process make the wastewater The suspended solids (SS) are separated, and the amount of sludge discharge is large; at the same time, the lipids in the wastewater are degraded very slowly in anaerobic treatment, requiring a long residence time, and the lipids in the wastewater are easily degraded in the UASB reactor. It is difficult to stay for a long time because it floats up to block the air chamber, and the system is difficult to operate, so the efficiency of wastewater treatment is low

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