CN102531283A - Method for treating food processing organic wastewater containing high-concentration fat and suspended matter - Google Patents

Abstract

A method for treating food processing organic wastewater containing high fat and high suspended matter, characterized in that the method is: the organic waste water from food processing containing high fat and high suspended matter flows into the standing pool through the workshop drainage ditch, and several A metal grille filter screen, the mesh ranges from 4 to 10 meshes, to intercept larger suspended matter; the upper and lower oil separators are set in the static pool, and the wastewater is allowed to stand in the static pool for 1-2 days, suspended in the The grease on the surface is blocked by the upper oil separator, and the sediment deposited on the bottom is blocked by the lower oil separator, which meets the second-level emission standard in the national emission standard (GB8978-1996). The technical effect of the invention is that waste water can be treated sustainably, and the physical treatment method is adopted, the cost is low, the method is easy to be popularized and used, and the pollution is minimized.

Description

A method for treating food processing organic wastewater containing high fat and high suspended solids

technical field

The invention relates to a method for treating organic wastewater, in particular to a method for treating food processing organic wastewater containing high fat and high suspended matter.

Background technique

In the process of food processing, there will be a large amount of food organic wastewater containing high fat and high suspended solids. If the wastewater is directly discharged into the river without treatment, it will seriously damage the ecological environment. In order to treat these organic wastewater, the existing methods are expensive and difficult to popularize. use.

Contents of the invention

The purpose of the present invention is to provide a method for treating food processing organic wastewater containing high fat and high suspended solids, which adopts physical treatment, reduces secondary pollution, and has low use cost.

The present invention is realized in this way, the method is: the food processing organic waste water that contains high fat, high suspended solids flows into the standing pool through the workshop drainage ditch, and several metal grid filter screens are arranged in the drainage ditch, and the grids are from 4 to 10 The mesh is different to intercept larger suspended solids; the upper and lower oil separators are set in the static tank, and the wastewater is allowed to stand in the static tank for 1-2 days, and the grease suspended solids are basically suspended on the surface, and the surface can reach 1-2 cm thick viscous grease, there is also a small amount of heavy solids deposited at the bottom, and the suspended solids in the middle and upper parts are less, the grease suspended on the surface is blocked by the upper oil separator, and the sediment deposited at the bottom is blocked by the lower oil separator. Regularly use the pump to discharge, and the water outlet in the static pool is set at the middle and upper part; the water in the static pool flows into the regulating pool, and the regulating pool plays the role of regulating the water quantity and quality; the wastewater in the regulating pool is pumped into the BASB anaerobic reactor for treatment. Anaerobic treatment can remove most of the organic matter; the effluent of the UASB reactor flows into the biological contact oxidation tank to further remove the remaining organic matter; the effluent of the biological contact oxidation tank flows into the flocculation sedimentation tank, and is hydraulically stirred at the inlet of the tank Formal dosage is mass fraction 3‰~5‰ basic aluminum chloride (liquid basic aluminum chloride, solid basic aluminum chloride 4 times diluted), the effluent in the sedimentation tank finally reaches the standard discharge, reaching the national discharge standard (GB8978-1996) in the secondary emission standards.

The technical effect of the invention is that waste water can be treated sustainably, and the physical treatment method is adopted, the cost is low, the method is easy to be popularized and used, and the pollution is minimized.

Detailed ways

The present invention is realized in this way, the method is: the food processing organic waste water that contains high fat, high suspended solids flows into the standing pool through the workshop drainage ditch, and several metal grid filter screens are arranged in the drainage ditch, and the grids are from 4 to 10 The mesh is different to intercept larger suspended solids; the upper and lower oil separators are set in the static tank, and the wastewater is allowed to stand in the static tank for 1-2 days, and the grease suspended solids are basically suspended on the surface, and the surface can reach 1-2 cm thick viscous grease, there is also a small amount of heavy solids deposited at the bottom, and the suspended solids in the middle and upper parts are less, the grease suspended on the surface is blocked by the upper oil separator, and the sediment deposited at the bottom is blocked by the lower oil separator. Regularly use the pump to discharge, and the water outlet in the static pool is set at the middle and upper part; the water in the static pool flows into the regulating pool, and the regulating pool plays the role of regulating the water quantity and quality; the wastewater in the regulating pool is pumped into the BASB anaerobic reactor for treatment. Anaerobic treatment can remove most of the organic matter; the effluent of the UASB reactor flows into the biological contact oxidation tank to further remove the remaining organic matter; the effluent of the biological contact oxidation tank flows into the flocculation sedimentation tank, and is hydraulically stirred at the inlet of the tank Formal dosage is mass fraction 3‰~5‰ basic aluminum chloride (liquid basic aluminum chloride, solid basic aluminum chloride 4 times diluted), the effluent in the sedimentation tank finally reaches the standard discharge, reaching the national discharge standard (GB8978-1996) in the secondary emission standards.

Claims (1)

1. A method for processing food processing organic wastewater containing high fat and high suspended matter, characterized in that the method is: the organic waste water from food processing containing high fat and high suspended matter flows into the standing pool through the workshop drain, and the drain is set There are a number of metal grille screens, ranging from 4 to 10 meshes, to intercept larger suspended solids; the upper and lower oil separators are set in the static pool, and the waste water is allowed to stand in the static pool for 1-2 days. The grease suspended on the surface is blocked by the upper oil separator, and the sediment deposited at the bottom is blocked by the lower oil separator, and is regularly discharged by a pump. The water outlet in the static pool is set at the middle and upper part; the water in the static pool flows into the regulating pool by itself. The wastewater in the adjustment tank is pumped into the BASB anaerobic reactor for anaerobic treatment. The effluent from the UASB reactor flows into the biological contact oxidation tank to further remove the remaining organic matter; the effluent from the biological contact oxidation tank flows into the flocculation sedimentation tank. The dosage of hydrodynamic stirring at the inlet is 3‰~5‰ basic aluminum chloride, and the effluent in the sedimentation tank finally reaches the standard discharge, reaching the second-level discharge standard in the national discharge standard (GB8978-1996). .