Pig breeding farm waste water anaerobic digestion solution aerobic treatment method

Abstract

The invention relates to the technical field of waste water treatment and particularly discloses a pig breeding farm waste water anaerobic digestion solution aerobic treatment method. The treatment method comprises the steps that a two-stage AO process is used for treating a pig breeding farm waste water anaerobic digestion solution; pig breeding farm raw water untreated through anaerobic digestion is added into an anoxic pond of the two-stage AO process, and the addition mass is 20-40%. According to the treatment method, after the raw water is added into the anoxic pond, a carbon source needed by growth and reproduction of microorganisms and denitrification is increased, and biochemical performance of the pig breeding farm waste water anaerobic digestion solution can be effectively improved; the denitrification effect of the anoxic pond is enhanced, the ammonia nitrogen removing effect is enhanced, alkalinity is supplemented to an aerobic pond, and the stability of a pH value of the aerobic pond is maintained; in the operation process of the two-stage AO process treatment system, the alkalinity and the carbon source do not need to be supplemented, and the operation cost is saved greatly.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to an aerobic treatment method for pig farm wastewater anaerobic digestion liquid. Background technique [0002] With the rapid development of the country's pig industry in the direction of scale and intensification, pig waste, especially pig farm wastewater, contains high concentrations of organic matter, ammonia nitrogen and total phosphorus, and is discharged directly without treatment or inadequate treatment. If it enters the external water body, it is easy to cause serious pollution to the local water environment. At present, the environmental pollution caused by the livestock and poultry breeding industry has attracted the attention of relevant departments and all walks of life. [0003] The treatment experience at home and abroad shows that the use of anaerobic digestion technology to treat livestock and poultry wastewater and produce biogas can reduce waste and ...

AI Technical Summary

Problems solved by technology

The method provided by the invention is mainly to improve the performance of the anaerobic digestion solution of the pig farm wastewater by adding raw water from the pig farm that has not been treated by anaerobic digestion on the basis of the two-stage AO process, and effectively solve the imbalance of the carbon and nitrogen ratio of the pig farm wastewater anaerobic digestion solution , Poor biodegradability, difficult microbial culture, sharp drop in pH value of aerobic pool, etc.

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