Method for improving in-situ activation and modification efficiency of suspended filter material

Abstract

The invention provides a method for improving the in-situ activation and modification efficiency of a suspended filter material. A PP (polypropylene) resin is admixed with hydrothermal reaction wood micropowder rich in carboxyl groups and other acidic oxidation groups, so that the surface wettability, hydrophilicity and biocompatibility of the PP resin are enhanced, thus finally producing a granular PP hydrophilic suspended filter material; the in-situ activation and modification efficiency of the suspended PP filter material is improved by changing the production raw material formula of the PP filter material; the treatment efficiency is improved; the whole denitrification system only needs to control an independent building, only aerobic reaction conditions need to be controlled in the denitrification process, and the normal operation of the system can be ensured to complete high-efficiency denitrification without supplementing a certain buffer solution for compensating for alkalinity consumed in the nitration reaction, so that the effluent water can meet the requirements for reuse of reclaimed water. Meanwhile, the sludge is reduced, and the yield of the surplus sludge is reduced by 30% in comparison with the original treatment method, so that the operating cycle is relatively prolonged, and the back flush frequency and the backwash water quantity are reduced, thereby lowering the operating cost.

Description

technical field [0001] The invention relates to a biological denitrification technology in the field of sewage treatment, in particular to a method for improving the in-situ activation modification efficiency of a suspended filter material. Background technique [0002] Ammonia nitrogen is one of the main pollutants contained in wastewater. At present, the situation of ammonia nitrogen pollution in water body is intensified, and denitrification of wastewater has become a severe task. The traditional wastewater denitrification treatment system is to return part of the water treated by the aerobic device to the anaerobic device, so that the nitrogen components in the water rely on nitrifying bacteria to perform aerobic nitrification in the aerobic treatment device, and then return to the former Anaerobic denitrification is carried out in the anaerobic treatment device, so that the nitrogen components are completely degraded in the form of nitrogen gas. In order to return the ...

AI Technical Summary

Problems solved by technology

However, for the above-mentioned high-concentration sewage treatment devices based on suspended foamed plastic particles such as PP and EPS and the treatment system based on denitrification, the entire denitrification system needs to control two or more independent structures, and this denitrification process needs to control two types For different reaction conditions, it is necessary to add a certain amount of buffer solution to compensate for the alkalinity consumed by the nitrification reaction in order to ensure the normal operation of the system. Therefore, it is difficult to control the operating conditions of the system, the process structure is complicated, and the processing time is long.

[0003] Based on the above situation, the patent ZL201210245395.3 discloses an in-situ activation modification treatment method for suspended filter materials, which mainly aims at the shortcomings of the existing wastewater denitrification treatment system, such as difficult control of operating conditions, complex process structure, and long treatment time. The filter material after in-situ activation and modification treatment can directly perform primary aerobic denitrification, and the effluent water quality is high and can be directly used

However, ZL201210245395.3 requires the suspension filter material to be in the activation solution in the implementation of the technical scheme, first stirred and mixed for 20-30 hours, and then soaked for 1-3 days, which must have a sufficient volume for the in-situ modification of a large number of suspension filter materials Activation pool, activation filter production line is small, and the supply is severely restricted

Images