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Film coating method of filling material in biological contact oxidation pond

A film hanging method and biological contact technology, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc. The effect of increasing the amount of contact, accelerating the contact area, and increasing the adhesion speed

Active Publication Date: 2009-04-15
山西科腾环保新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From comparative literature 1, 2, and 3, it can be seen that the currently reported biofilm method has the disadvantages of long time, complicated operation, and low impact load resistance, which makes the growth of microorganisms on the carrier poor, which leads to the biofilm method for wastewater treatment. The effect is not ideal
In contrast, literature 4 has a better wastewater treatment effect after filming, but it needs to increase the internal electrolysis device, which is complicated to operate.

Method used

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  • Film coating method of filling material in biological contact oxidation pond
  • Film coating method of filling material in biological contact oxidation pond
  • Film coating method of filling material in biological contact oxidation pond

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The test uses a biological contact oxidation tank with a volume of 13 liters to treat domestic wastewater. The filler is a suspended semi-soft spherical plastic filler. The temperature of the test environment is 26°C, the pH of the wastewater is 6.8, and the sludge is taken from the secondary sedimentation tank of a domestic sewage plant. The return sludge in the SV after acclimatization 30 =30%, the mass density is 7000mg / L.

[0027] Mix the cultivated sludge with domestic waste water at a volume ratio of 1:3, and add 300ml of nutrients according to the ratio of C:N:P=100:5:1 (see Table 1 below for the formula of the nutrient solution), and then mix the mixture Inject into the oxidation pool to completely immerse the filler, pour the rest into the circulation pool, control DO=1.0mg / L in the oxidation pool at room temperature, press figure 1 Aeration was indicated for 6 hours. Then connect the oxidation tank to the circulation tank, keep the aeration volume constant, ...

Embodiment 2

[0032] The industrial waste water from the anaerobic tank of a certain coking plant is used as test water, and the test operating conditions and steps are the same as in Example 1.

[0033] Four days after entering the water, the COD removal rate of the wastewater is ≥60%, and the NH 3 -N removal rate ≥ 50%, good microscopic growth of microorganisms. One week later, it was found that there were filamentous bacteria growing on the edge of the filler, and there were many protozoa and metazoans such as paramecia, rotifers, nematodes, bell worms and so on. The biofilm close to the center of the filler was observed through a microscope and found to have more cocci, bacilli, bacterial gelatinous groups and a large number of bell worms. All the indicators prove that the biofilm obtained by this method is stable and has good wastewater treatment capacity.

Embodiment 3

[0035] The test adopts a biological contact oxidation tank with a volume of 24 liters to treat domestic wastewater, and the test operating conditions and steps are the same as in Example 1.

[0036] Three days after entering the water, the film was successfully formed, and the COD removal rate of the wastewater reached 80%, and the NH 3 -N removal rate ≥ 70%, microscopic examination of the biological phase on the surface of the filter material, found that the sticky sludge on it is mainly protozoa or metazoans such as bellworms, rotifers, paramecium, and cladidae, etc., indicating that the filter material The growth of biofilm on the surface has been relatively perfect. And in the later stage of the test, the amount of water inflow was increased (HRT was reduced from the initial 12h to 4h), and the degree of erosion of the biofilm on the filler by the water flow was increased. Tests have shown that waste water has no effect on COD, NH 3 The removal rate of -N did not change ...

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Abstract

The invention discloses a suspending film method of filler in biological contact oxidation pond, which comprises the following steps: fistedly domesticating activated sludge; adding nutrient solution into domestic activated sludge and armed waste water miscible liquids; mixing evenly; injecting into oxidation pond; aerating; cycle culturing; making microbe adhere on carrier; stewing and settling span; discharging all of sludge water miscible liquids; proceeding waste water culture from low density to high density continually till forming stable shockproof biological film.

Description

Technical field: [0001] The invention relates to biological treatment of waste water, in particular to a biofilm method for treating waste water, in particular to a film-hanging method for fillers in biological contact oxidation tanks. Background technique: [0002] The key to biofilm treatment of wastewater is the growth of microorganisms on the carrier in the oxidation tank, that is, the degree of fixation of the biofilm on the carrier and the activity of microorganisms, which mainly depends on the properties of the carrier material and the combination of the organism and the carrier (that is, the biofilm) ). At present, most people pay attention to the research on the type and structure of the biological carrier, and there have been a large number of literature reports and patent reports. The literature reports on the research on the biofilm-hanging methods mainly include "stuffy exposure method", "circular film-hanging method", There are four kinds of "rapid sludge remo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/10
CPCY02W10/10
Inventor 程芳琴李睿杨凤玲张子兴
Owner 山西科腾环保新材料股份有限公司
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