Culture wastewater resourceful concentration and recycling device and technology

Abstract

The invention provides a culture wastewater resourceful concentration and recycling device and technology. The culture wastewater resourceful concentration and recycling device is characterized by comprising an anaerobic reactor, a filtering tank, an alkalinity regulating tank, a preheating tank, a condensation circulating groove and a film distillation assembly; a biogas slurry outlet of the anaerobic reactor is connected with the filtering tank, a biogas slurry of the filtering tank is connected with the alkalinity regulating tank, a biogas slurry outlet of the alkalinity regulating tank is connected with the preheating tank, the preheating tank is connected with the hot feed liquid side of the film distillation assembly, and the condensation liquid side of the film evaporation assembly is connected with the condensation circulating groove. The method and device have the advantages that biogas and biogas slurry obtained after preliminary anaerobic treatment of culture wastewater are sufficiently utilized, biogas slurry is concentrated and purified water is recycled through the film evaporation technology; biogas generated through anaerobism is adopted as a main energy source of the whole treatment technology, the technology system can be operated on the spot, and energy consumption of the system is lowered; ammonia nitrogen elements in the concentrated solution can be effectively stored.

Description

technical field [0001] The invention belongs to the field of animal husbandry wastewater treatment, and is especially suitable for the treatment of high-ammonia nitrogen and high-phosphorus organic wastewater produced in the breeding process. The aquaculture factory area preliminarily treats wastewater containing high concentrations of ammonia nitrogen and phosphorus by anaerobic fermentation to obtain biogas and biogas Use the process system of the present invention to concentrate and recycle the effluent from the pool to obtain 5-20 times concentrated organic liquid fertilizer containing nitrogen and phosphorus elements, and recover pure water at the same time. The present invention can realize resource utilization and reuse of waste water , to achieve "zero discharge" of livestock breeding wastewater. Background technique [0002] Membrane distillation technology is a new technology that combines traditional distillation technology and membrane separation technology. Duri...

AI Technical Summary

Problems solved by technology

[0003] The deficiencies of the existing membrane distillation process lie in two main aspects: energy consumption and poor interception effect on volatile solutes: in the membrane distillation process, the liquid to be treated needs to be heated, which occupies the energy consumption of the membrane distillation process. For the vast majority; the interception effect for volatile solutes is not good, such as ammonia, which will volatilize with the steam to reach the condensation side during the membrane distillation process. For the concentration process that needs to retain this component, the traditional membrane distillation method has not been able to make up for it this defect

[0004] For the treatment of wastewater in the animal husbandry industry, the water quality of the biogas tank effluent after traditional anaerobic fermentation is difficult to meet the discharge standard. At the same time, the nitrogen, phosphorus and other nutrients rich in wastewater are also a waste during the discharge process

Images