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Sludge recycle treatment method

A treatment method and recycling technology, applied in the field of sludge recycling, can solve problems such as damage to sewage treatment equipment, difficulty in recycling, and impact on sewage treatment effects, and achieve good water holding capacity and long-lasting fertilizer efficiency

Active Publication Date: 2016-01-06
QINGDAO ZHIKE ECOLOGICAL ENVIRONMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, methods such as adding chemicals and chemical precipitation are usually used to remove nitrogen and phosphorus in the sludge, but the precipitation crystals formed after removing nitrogen and phosphorus are difficult to recycle; and as time goes by, they will slowly precipitate to In the pump body and pipeline of the sludge treatment equipment, it affects the sewage treatment effect and damages the sewage treatment equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Effect of composite adsorbent on anaerobic fermentation

[0033] Take the dewatered raw sludge from the sewage treatment plant, adjust the solid-to-liquid ratio to 15%, conduct hydrothermal treatment at 160°C for 1 h, and separate the hydrothermal sludge from solid and liquid. First, measure the indicators SCOD and TN in the liquid phase. , NH 3 -N, PO 4 3- TP, and then add a composite adsorption material prepared from waste glass and dolomite with a weight ratio of 1:1 for adsorption. After the adsorption is completed, continue to measure four indicators to obtain adsorption efficiency and nitrogen and phosphorus concentration after adsorption. The results are shown in Table 1. Show.

[0034] Table 1 Comparison table of sludge composition before and after adsorption before anaerobic fermentation

[0035]

[0036] The data in Table 1 shows that after the sludge is subjected to hydrothermal treatment, the concentration of carbon, nitrogen, and phosphorus in the liqui...

Embodiment 2

[0039] Implementation 2 The effect of composite adsorbents on the concentration of nitrogen and phosphorus after anaerobic gas production

[0040] Separate the solid-liquid sludge after anaerobic gas production in Example 1, and measure the SCOD, TN, and NH in the liquid phase. 3 -N, PO 4 3- TP index, and then add a composite adsorption material prepared from waste glass and dolomite with a weight ratio of 1:1. After the adsorption step, continue to measure four indicators to obtain the adsorption efficiency and the concentration of nitrogen and phosphorus after adsorption. The results are shown in Table 2. Shown.

[0041] Table 2 Comparison table of sludge composition before and after adsorption after anaerobic fermentation

[0042]

[0043] The data in Table 2 shows that after anaerobic gas production, the concentration of ammonia nitrogen and phosphate in the liquid phase of the sludge increases, and the addition of composite adsorbents can further remove the concentration of nitr...

Embodiment 3

[0045] Implement 3 sludge recycling treatment methods

[0046] Take the dewatered raw sludge from the sewage treatment plant, adjust the solid-liquid ratio to 15%, hydrothermally heat the sludge at 160℃ for 1h, separate the sludge from solid and liquid, add composite adsorbents to the liquid phase, and mix the liquid and solid phases for anaerobic After 28 days of fermentation, the fermented sludge undergoes solid-liquid separation, the liquid phase is added to the composite adsorption material for adsorption again, and the adsorbed liquid phase and solid phase enter the next round of sludge treatment.

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Abstract

The invention belongs to the field of sludge treatment and discloses a sludge recycle treatment method. In the method, sludge is recycled through the steps of hydro-thermal treatment, solid-liquid separation, adsorption through composite adsorption materials, anaerobic fermentation and the like. By means of the method, cost can be reduced to the maximum degree, waste is used for treating the sludge, and popularization is easy; nitrogen and phosphorus in the sludge are removed through the synergistic effect of a physical absorption method and a chemical precipitation method, the anaerobic digestion efficiency is improved, and meanwhile the technical problems that sediment crystals obtained after the nitrogen and the phosphorus are removed are difficult to recycle and likely to block a sludge removing pipeline and a pump body are solved; waste materials obtained after sludge removing of the composite adsorption materials can serve as controlled-release fertilizer in application, and waste is turned into wealth.

Description

Technical field [0001] The invention relates to the field of sludge treatment, in particular to a sludge resource treatment method. Background technique [0002] With the development of society, people pay more and more attention to the problem of environmental pollution. The number of sludge treatment plants increases accordingly, and the amount of surplus sludge produced will also increase. At present, the phenomenon of “heavy water and light sludge” is serious in my country. The design of the small sludge treatment plant only considered the sludge thickening and dewatering process, and did not consider the stabilization and harmlessness of the sludge in the sludge. Sludge contains relatively rich organic matter and nitrogen and phosphorus resources. If these resources can be recycled, it will be of great significance to eliminate environmental pollution caused by sludge and solve the sustainable use of energy and resources. [0003] Anaerobic digestion is a very important step i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C02F11/10C02F11/04B01J20/10B01J20/30
CPCY02E50/30
Inventor 刘霖王在钊宫磊
Owner QINGDAO ZHIKE ECOLOGICAL ENVIRONMENT TECH CO LTD
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