Method for rapidly starting A2/O system by utilizing dredged sediment and judgment method for successful starting

A technology of dredging sediment and quick start, which is applied in the field of environmental engineering, can solve the problems of cumbersome detection methods, time-consuming, lagging response, etc., and achieve the effect of simple detection, less time-consuming and low cost

Inactive Publication Date: 2021-03-02
ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Another technical problem to be solved by the present invention is to overcome the problems of sludge performance index detection, water quality physical and chemical index analysis, and bacterial biology detection in the prior art. 2 O+M...

Method used

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  • Method for rapidly starting A2/O system by utilizing dredged sediment and judgment method for successful starting
  • Method for rapidly starting A2/O system by utilizing dredged sediment and judgment method for successful starting
  • Method for rapidly starting A2/O system by utilizing dredged sediment and judgment method for successful starting

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Experimental program
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Effect test

Embodiment 1

[0032] Using Dredged Sediment as Reactor Startup Sludge Quick Start A 2 / O system, A 2 The process flow chart of the / O system is as follows: figure 1 As shown, the specific startup steps are as follows:

[0033] 1) Take the dredged sediment for stuffy exposure treatment, and the dissolved oxygen in the stuffy exposure is controlled at 2-5mg / L. After the first 4-8 hours of stuffy exposure, stop the aeration and let it stand to remove the upper layer of floating mud. Expose again for 1-2 days, and pump nutrient solution into it, the COD concentration in the nutrient solution is 300-600mg / L, NH 3 -N concentration is 25-40mg / L, TP concentration is 2-5mg / L. After standing still, the upper layer of floating mud mixture is removed again, and the rest is used as the bottom mud for reactor startup;

[0034] 2) Add the bottom mud after stuffy exposure to A 2 In the O+MBR reactor, the dosage in the anaerobic pool 7, the anoxic pool 8 and the aerobic pool 9 all account for 50-75% o...

Embodiment 2

[0038] S1. Sampling: Since starting the reactor, take the sludge water in the aerobic tank 2-3 times a day, 50-100ml each time, depending on the condition of the aeration tank mixture to be tested, dilute n times with distilled water to The protozoa and metazoa of the grid can be counted as degrees, where n is greater than or equal to 1;

[0039] S2. Plate making: Calibrate the volume of each drop of water in the burette to 0.05mL, take a clean counting plate, cover the counting area with a cover glass, and run along the bottom of the cover glass from the grooves on both sides of the middle platform of the counting plate. Add a drop of diluted mixed solution to the edge, let the mixed solution fill the counting area with the surface tension of the liquid;

[0040] S3. Counting: Use a microscope to find the counting area under a low-power lens, and then switch to a medium-power lens (16*10) to observe and record the types of protozoa including sessile ciliates and metazoans inc...

Embodiment 3

[0048] In addition to microbial microscopic examination, routine sludge performance (SV30, MLSS, SVI, MLVSS) and pollutant indicators (COD, NH 3 -N, TN, TP) detection. See Table 2 and Table 3 for the removal effect of each index and the performance change of sludge within 10 days.

[0049] Table 2 Pollutant removal effect

[0050]

[0051]

[0052] Table 3 Changes in sludge performance

[0053]

[0054] It can be seen from the comparison of the removal rates of COD and ammonia nitrogen in the aeration tank at different start-up times in Table 1 and Table 2 that when there are more activated sludge, the activated sludge has good performance, good treatment effect, and good effluent quality. COD of the system at this time, NH 3 -N, TN, and TP have good removal effects, and the removal rates are 95.81%, 97.26%, 85.19%, and 77.81%, respectively. The appearance of rotifers in the activated sludge during the cultivation period indicates that the sludge is basically matu...

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Abstract

The invention belongs to the technical field of environmental engineering, and particularly relates to a method for quickly starting an A2/O system by utilizing dredged sediment and a judgment methodfor successful starting. Dredged sediment is taken and subjected to stuffy aeration for 1-3 days, the stuffy-aerated sediment is added into an A2O+MBR reactor, the dissolved oxygen content of each tank is controlled, and a nutrient solution is continuously fed. The methods have the characteristics of resource utilization, treatment of waste with waste, high pollutant removal rate and excellent sludge performance. Continuous culturing is conducted for 5 days or more, sludge water in an aerobic tank is taken for 2-3 times every day, indicator organisms are observed under a microscope, the numberof immobilized ciliates and rotifers is recorded, the average number of the immobilized ciliates and the average number of the rotifers in 1ml of the sludge water in the aerobic tank are calculated,and when the number of the immobilized ciliates is continuously more than or equal to 800 for three times and the number of otifers is more than or equal to 45 and less than or equal to 150, it is indicted that the reactor is started successfully. The judgement method can rapid and directly reflect the change of the environment and the starting process of the reactor, and the process is guided intime.

Description

technical field [0001] The invention relates to a quick-start A 2 The / O system and the judging method for successful startup belong to the technical field of environmental engineering. Background technique [0002] In order to improve the water quality of rivers and lakes and eradicate black and odorous inland rivers, many cities have carried out large-scale dredging and dredging projects in recent years, resulting in a large amount of dredged sediment. At present, the resource management of dredged sediment mainly includes land utilization technology, filling material production technology, building material production technology and graded resource utilization technology. Land use is to apply dredged sediment to farmland, forest land, landscaping and land restoration and reconstruction of severe disturbance; the solidified filling material formed by dehydration and solidification of dredged sediment can be used for backfilling in low-lying places, dam reinforcement, and ...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/12
CPCC02F3/30C02F3/1268C02F2103/007Y02W10/10
Inventor 杨丹丹宋永莲郑侠刘俊凌琪
Owner ANHUI ZHONGHUAN ENVIRONMENTAL PROTECTION TECH CO LTD
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