Betel briefs on the development trend of dairy wastewater treatment process

Dairy wastewater treatment process

 

2.1 Batch Activated Sludge Process - Coagulation and Sedimentation Method [2]

 

After the wastewater is removed from the large suspended solids through the grid, it enters the conditioning tank. After the waste water is homogeneously averaged. The sewage pump is upgraded into the SBR reaction equipment for biochemical treatment. After processing, the middle pool is arranged. Then through the sewage pump to the reaction sedimentation tank (using the pump before the drug). After the solid-liquid separation, the outer row is discharged. The biochemical sludge and the sedimentation sludge are statically discharged into the sludge concentration tank. After being concentrated, it is used as a fertilizer outside the sludge truck. The supernatant of the concentrating tank is returned to the conditioning tank for reprocessing.

 

2.2 Anaerobic (UASB) – Aerobic (TF) method: [3]

 

Anaerobic treatment The wastewater from the workshop enters the regulation tank through the sewer to adjust the water quality. Warm up when the water temperature is low. To meet the water inlet requirements of the UASB.

 

Aerobic treatment Anaerobic effluent cannot meet Class I emission requirements and is further treated with aerobic (TV). The inorganic solid bioactive filler is added to the TF pool. The anaerobic effluent is evenly spread on the surface of the TF cell packing by automatically rotating the water distributor, and oxygen is supplied by natural ventilation. The TF water is partially refluxed to ensure the hydraulic load and the speed of the water distributor.

 

2.3 hydrolysis acidification - SBR method

 

The sewage flows through the grille to remove the larger suspended solids, enters the regulating tank, balances and tempers in the regulating tank, and pre-aerates to degrade a part of COD, and then enters the hydrolysis acidification tank, through the anaerobic fermentation in the hydrolysis acidification tank, the sewage further Degradation, and the macromolecular organic matter in the sewage is degraded into small molecular organic matter. After the previous pretreatment, the sewage flows through the intermediate tank into the SBR reaction tank, and the COD is finally degraded and discharged. After the SBR is also subjected to pressure filtration of the excess sludge produced during the reaction, the mud cake is periodically discharged.

 

The wastewater treatment process is shown in the figure:

 

Sewage→grid→regulation tank→hydrolysis acidification tank→intermediate pool→SBR pool→effluent