Zeolite-bio combined adsorption regenerative sewage treating process

Abstract

The zeolite and biont combined adsorption process for removing and treating organics and amino nitrogen in urban sewage, deomestic sewage and industrial waste water is characterized by that the zeoliet or zeolite powder can be added into an adsorption pool, after acertain time period of culture and acclimation, the zeolite or zeolite powder can be formed into zeolite or zeolite powder sludge, then said sludge is undergone the process of biological regeneration to implement the regeneration treatment of the urban sewage, domestic sewage and industrial waste water. Said invention utilizes the physica, chemical and biological synergistic action of high-concentration and high-activity zeolite or zeolite powder sludge to adsorb pollutants in adsorption pool, at the same time the zeolite or zeolite powder can adsorb and exchange the amino nitrogen in the waste water.

Description

technical field [0001] The zeolite biological joint adsorption regeneration sewage treatment method involves the removal and treatment of pollutants in urban sewage, domestic sewage and industrial organic waste water (including organic matter and ammonia nitrogen). Background technique [0002] There are many kinds of treatment processes for urban sewage, domestic sewage and industrial organic wastewater. Among them, biological treatment process is the most widely used mainstream process with stable effect and low operating cost. [0003] These biological treatment processes are divided into two categories according to the pollutants removed, [0004] The first type is for the purpose of removing organic matter. In the specific process, the activated sludge method or biofilm method of aeration treatment is used. The microorganisms used are mainly heterotrophic microorganisms, such as the adsorption regeneration process. The second type is for the pur...

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Problems solved by technology

Similarly, the pre-denitrification / nitrification biological denitrification process also has certain problems. (1) In order to achieve denitrification, the overall hydraulic retention time of the denitrification tank and the nitrification tank is too long, resulting in a large investment; (2) due to denitrification Nitrogen or other gases are produced, resulting in poor sedimentation performance of the sludge and affecting the quality of effluent water; (3) The organic volatile content in the sludge is high, and the final treatment and disposal are difficult

[0007] There are several existing processes for using zeolite or zeolite powder to treat urban sewage, domestic sewage and industrial organic wastewater (including organic matter, ammonia nitrogen), which are (1) filling the ion exchange column with zeolite or zeolite powder as an ion exchanger , or use zeolite as a fluidized bed carrier to treat wastewater, remove ammonia nitrogen in wastewater by ion exchange, and regenerate zeolite saturated by adsorption and exchange with chemical methods, such as regeneration with sodium chloride, but this regeneration method is costly , the operation is complicated, and the regeneration solution needs additional treatment; (2) Zeolite or zeolite powder is combined with activated sludge aeration tank, or combined with nitrification and denitrification process to form an enhanced biological denitrification process, and the zeolite saturated by adsorption exchange Or zeolite powder uses the nitrification of nitrifying bacteria to carry out biological regeneration. In the reactor, zeolite is the mobile carrier; (3) zeolite or zeolite powder is used as a filter medium or filler to exchange and adsorb ammonia nitrogen in wastewater. At the same time, in the reactor Aeration is carried out in the reactor to create conditions for the growth of nitrifying bacteria. While absorbing ammonia nitrogen, zeolite or zeolite powder is oxidized by nitrifying bacteria for biological regeneration. In this reactor, zeolite or zeolite powder is a fixed carrier

In the existing sewage treatment process of biologically regenerated zeolite or zeolite powder, the hydraulic retention time required in the biological section (adsorption section plus regeneration section) is still too long, requiring 5 to 6 hours, and zeolite or zeolite powder has excellent sedimentation performance underused

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