Suspended packing microbial quick film forming method

Abstract

The invention relates to a suspended packing microbial quick film forming method, which is characterized by: aerating sludge for 48 hours, inoculating aerated sludge serving as bacteria to be inoculated onto a sequencing batch reactor (SBR) filled with a suspended packing, aerating for 6 hours, standing and settling for 6 hours; adding nutritive medium, aerating for 10 hours, standing and settling for 2 hours and finishing an operation cycle, wherein two cycles of operation are made each day, and in the operation cycles, sludge is drained to keep the suspended solid concentration of the sludge within a range from 2 to 20 g / L constantly; and operating for 7 to 25 days and finishing the film forming. In the invention, by controlling the suspended solid concentration of the sludge, the competition between the sludge and nutrients is inhibited so as to allow biofilms to obtain enough nutrients. The method has the advantages of quick film forming, simple method, easy operation and high practicality. Thus, the method is suitable for suspended packing film forming of all kinds of sewage / wastewater and river water.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for quickly forming a film by suspended filler microorganisms. Background technique [0002] Biofilm sewage treatment is a technology that makes microorganisms such as nitrifying bacteria and denitrifying bacteria fix on the surface of the filler and grow in the form of a film to achieve sewage treatment. Generally, it can be divided into biological filter, biological turntable, biological contact oxidation method, etc. Although their structures are very different, their basic principles are the same, that is, through the contact between wastewater and biofilm, the mass transfer of solid-liquid two-phase is carried out. Biofilm biodegrades organic matter, enabling wastewater to be purified. The biofilm method has a high treatment efficiency and has obvious effects on water bodies slightly polluted by organic matter and ammonia nitrogen. However, the...

AI Technical Summary

Problems solved by technology

The activated sludge method has the advantages of large processing capacity, high processing efficiency and good effluent quality. Its various deformation processes have good nitrogen and phosphorus removal performance, and have been widely used in urban sewage treatment; its disadvantage is that it is not enough Stable, easy to produce sludge bulking and large sludge output, poor treatment effect on low-concentration sewage

The biofilm method has the advantages of stable operation, less residual sludge, simple management, strong ability to remove ammonia nitrogen and refractory pollutants, and can adapt to a wide range of water quality changes; the disadvantages of the fixed-fill biofilm sewage treatment device are: packing and Its supporting structure requires a high initial investment, and the fine particles produced by the biofilm shedding are not easy to settle, resulting in high turbidity of the effluent, easy plugging of the filler, and weak removal capacity of total nitrogen and total phosphorus

This method needs to adjust the load of the influent culture solution, which is cumbersome to control. If the control is not good, it is easy to cause the film-hanging microorganisms not to adapt to the concentration of the influent and fall off.