CN103193319A

CN103193319A - Treatment process of high ammonia nitrogen landfill leachate

Info

Publication number: CN103193319A
Application number: CN2012100075390A
Authority: CN
Inventors: 张科红; 夏小洪
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-10
Filing date: 2012-01-10
Publication date: 2013-07-10

Abstract

A treatment process of high ammonia nitrogen landfill leachate relates to the field of high ammonia nitrogen wastewater treatment. The process is as follows: cleaning a UASB reactor; introducing an aerobic biological sludge as an inoculation sludge into the UASB reactor through a sludge discharge port; when the sludge accounts for 2 / 3 of the UASB reactor, refluxing the sludge by a pipeline into the UASB reactor; mixing a stoste with reflux sludge from an A / O process, refluxing the mixture to an anoxic denitrification tank; two days after the sludge inoculation, sending the landfill leachate into the UASB reactor; maintaining a reflux ratio of activated sludge into the UASB reactor at 300%-500%; and detecting quality of outlet water from sedimentation tank every day. The invention breaks the problems of hard start-up and difficult bacteria culture of anammox, and reduces operating costs and expenses.

Description

A kind for the treatment of process of high ammonia nitrogen percolate

Technical field:

The present invention relates to the high-ammonia-nitrogen sewage process field, be specifically related to a kind for the treatment of process of high ammonia nitrogen percolate.

Background technology:

At present both at home and abroad to the most of Anammoxs that adopt of the percolate of high ammonia nitrogen, the short-cut denitrification technology is handled, Anammox is to obtain a kind of biochemical reaction of confirming in recent years, it is electron acceptor(EA) with the nitrite or nitrate, finish biological denitrification process with ammonia for the electronics coenosarc, its advantage is to have saved the denitrifying carbon source of traditional biological and ammonia nitrogen oxidation to the consumption of oxygen, but this technology starts relatively difficulty, mud is difficult to cultivate, the short-cut denitrification technology is in the NO2-stage with nitrifying process control, stop NO2-further to be oxidized to NO3-, carry out denitrification up to NO2-as the electronics final receptor, the control condition of this technology is relatively harsher, be difficult to reach, and cause the accumulation of NO2-in the technology operation process easily, finally cause the failure of runing, and these technology all can not satisfy high ammonia nitrogen, the requirement of low COD sewage disposal.

Summary of the invention:

The treatment process that the purpose of this invention is to provide a kind of high ammonia nitrogen percolate, it has been broken Anammox and has started difficult, the difficult difficult problem of spawn culture, and in the operation process, do not run effluent recycling, increase aquifer yield, cut operating costs and expense, and good to the removal effect of ammonia nitrogen, COD almost there is not removal effect, simultaneously improve water inlet C/N ratio greatly, promoted follow-up aerobic process biodegradability.

In order to solve the existing problem of background technology, the present invention takes following technical scheme: its processing technological flow is: (a), at first UASB reactor 1 is cleared up, remove the inside anaerobic sludge, and cancel self refluxing of original anaerobism;

(b), utilize aerobic biological sludge as seed sludge, enter UASB reactor 1 by mud discharging mouth, when reaching 2/3 volume of UASB reactor 1, begin to utilize pipeline to carry out the backflow of active sludge, UASB reactor 1 is put in backflow, stoste be back to anoxic denitrification pond 2 after A/O technology returned sluge mixes;

(c), sludge seeding two days later, enter UASB reactor 1 with percolate every day, the pre-culturing process as mud remains on 300%-500% with the reflux ratio that enters the active sludge of UASB reactor 1;

(d), detect the water quality situation of settling tank 4 water outlets every day, make COD, ammonia-nitrogen content, C/N is than maintaining certain scope.

The present invention has following beneficial effect: it has been broken Anammox and has started difficult, the difficult difficult problem of spawn culture, and in the operation process, do not run effluent recycling, increase aquifer yield, cut operating costs and expense, and the removal effect to ammonia nitrogen is good, COD is not almost had removal effect, improved water inlet C/N ratio greatly simultaneously, promoted follow-up aerobic process biodegradability.

Description of drawings:

Fig. 1 is process flow diagram of the present invention;

Fig. 2 is COD in the water outlet of the present invention, ammonia-nitrogen content, the change curve of C/N ratio.

Embodiment:

With reference to Fig. 1, this embodiment is taked following technical scheme: its processing technological flow is: (a), at first the UASB reactor is cleared up, remove the inside anaerobic sludge, and cancel self refluxing of original anaerobism;

(b), utilize aerobic biological sludge as seed sludge, enter UASB reactor 1 by mud discharging mouth, when reaching 2/3 volume of UASB reactor 1, begin to utilize pipeline to carry out the backflow of active sludge, the UASB reactor is put in backflow, stoste be back to the anoxic denitrification pond after A/O technology returned sluge mixes;

(c), sludge seeding two days later, enter percolate every day, the pre-culturing process as mud remains on 300%-500% with the reflux ratio that enters the active sludge of UASB reactor;

As can be seen from Figure 2, COD maintains 2000 substantially, ammonia-nitrogen content maintains about 500, the C/N ratio maintains about 4, thereby it is obvious to the removal effect of ammonia nitrogen to draw the present invention, and COD is not had removal effect substantially, and make ammonia-N removal rate reach 72.2%, improve the biodegradability of back-end processing system greatly.

This embodiment has been broken Anammox and has been started difficult, the difficult difficult problem of spawn culture, and in the operation process, do not run effluent recycling, increase aquifer yield, cut operating costs and expense, and the removal effect to ammonia nitrogen is good, COD is not almost had removal effect, improved water inlet C/N ratio greatly simultaneously, promoted follow-up aerobic process biodegradability.

Claims

1. the treatment process of a high ammonia nitrogen percolate is characterized in that its processing technological flow is: (a), at first UASB reactor (1) is cleared up, remove the inside anaerobic sludge, and cancel self refluxing of original anaerobism;

(b), utilize aerobic biological sludge as seed sludge, enter UASB reactor (1) by mud discharging mouth, when reaching 2/3 volume of UASB reactor (1), begin to utilize pipeline to carry out the backflow of active sludge, UASB reactor (1) is put in backflow, stoste be back to anoxic denitrification pond (2) after A/O technology returned sluge mixes;

(c), sludge seeding two days later, enter UASB reactor (1) with percolate every day, as the pre-culturing process of mud, the reflux ratio that will enter the active sludge of UASB reactor (1) remains on 300%-500%;

(d), detect the water quality situation of settling tank (4) water outlet every day, make COD, ammonia-nitrogen content, C/N is than maintaining certain scope.