Treatment method cattle farm culture wastewater

Abstract

The invention relates to a treatment method of wastewater, particularly a treatment method of cattle farm culture wastewater, which comprises the following steps: (1) introducing culture wastewater into a solid-liquid separator to remove suspended substances; (2) sending the wastewater subjected to solid-liquid separation into a preliminary sedimentation tank, and adding an ammonia nitrogen and phosphate capturing agent into the preliminary sedimentation tank; (3) pumping effluent water of the preliminary sedimentation tank to a floatation unit, and adding a reagent to remove fine suspended substances; (4) sending effluent water of the floatation unit into a membrane bioreactor to filter out the suspended substances, colloidal substances and bio-unit microbial florae in the wastewater and trap high-molecular organic substances which can not be easily degraded temporarily, wherein the retention time of the reactor is prolonged to maximally decompose the high-molecular organic substances; and (5) sending effluent water of the membrane bioreactor into a disinfection tank, disinfecting, and discharging after reaching the standard or recycling. The treatment method of cattle farm culture wastewater has the advantages of favorable denitrification and dephosphorization effects, high shock load resistance, stable operation, energy saving and favorable effluent water quality, and is convenient for control and maintenance.

Description

technical field [0001] The invention relates to a sewage treatment method, in particular to a treatment method for aquaculture wastewater. Background technique [0002] At present, wastewater from large-scale cattle farms in my country is generally treated by anaerobic-aerobic combined process. However, the anaerobic operating temperature generally needs to be around 35°C. Stable operation requires heating of the influent water temperature, and the operating cost is high; and due to anaerobic The biogas slurry after oxygen treatment contains a large amount of refractory organic matter, and its nitrogen and phosphorus content is high, and the carbon and nitrogen ratio is low. Therefore, when traditional wastewater treatment methods such as contact oxidation, SBR method, and oxidation ditch method are used, the treatment effect is uniform It is not ideal, and has the disadvantages of unstable operation, high construction and operation costs, and no consideration of phosphorus re...

AI Technical Summary

Problems solved by technology

[0002] At present, wastewater from large-scale cattle farms in my country is generally treated by anaerobic-aerobic combined process. However, the anaerobic operating temperature generally needs to be around 35°C. Stable operation requires heating of the influent water temperature, and the operating cost is high; and due to anaerobic The biogas slurry after oxygen treatment contains a large amount of refractory organic matter, and its nitrogen and phosphorus content is high, and the carbon and nitrogen ratio is low. Therefore, when traditional wastewater treatment methods such as contact oxidation, SBR method, and oxidation ditch method are used, the treatment effect is uniform It is not ideal, and has unstable operation, high construction and operation costs, and does not consider phosphorus removal and other shortcomings, so it is difficult to be practically used in projects

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