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Method for treating phosphorus-containing sludge

A treatment method and sludge technology, applied in sludge treatment, biological sludge treatment, water/sludge/sewage treatment, etc., can solve the problems that restrict the wide application of chemical phosphorus removal technology, insufficient reaction of phosphorus-containing compounds, sludge Agricultural use has not reached a consensus and other issues, achieving good water treatment effects, being conducive to large-scale promotion, and excellent decontamination efficiency.

Pending Publication Date: 2021-12-07
巢湖市爱华环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are 5,464 urban sewage treatment plants in my country, with a total annual sludge output of about 40 million tons. The sludge produced per 10,000 tons of sewage is 8.5-9 tons. Treated clean sewage enters the environment together, greatly reducing the effect of emission reduction
For a long time, there has been a problem of "heavy water and light mud" in sewage treatment. Sludge disposal facilities are seriously insufficient, the rate of harmless disposal is low, the content of heavy metals in sludge is high, and the content of organic matter is low. There is no consensus on the agricultural use of sludge. The scope of land use is limited. It is gradually banned, and sludge incineration consumes a lot of waste and has been completely reduced, gradually becoming the first choice for sludge treatment
[0003] At present, phosphorus removal agent is one of the necessary detergents for removing phosphorus substances in sludge. There are many sewage phosphorus removal agents on the market. When facing sewage in various environments for phosphorus removal, the effect is not significant enough. Insufficient reaction of phosphorus compounds, large dosage, slow chemical reaction speed, small and light floc formation, slow sedimentation and poor filterability, etc., seriously restrict the wide application of chemical phosphorus removal technology

Method used

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  • Method for treating phosphorus-containing sludge

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Experimental program
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Effect test

Embodiment 1

[0031] The modified diatomite is prepared through the following steps:

[0032] Grind diatomite into powder, then add diatomite powder into a beaker containing sodium carbonate solution and stir evenly, then add saturated calcium chloride solution and stir evenly to obtain a mixed solution, filter the mixed solution with filter paper, and the filter residue remains In the beaker, the filter residue was dried, and then put into a muffle furnace for calcination. The reaction temperature of the muffle furnace was 550° C., and the reaction time was 3 hours to obtain modified diatomite.

Embodiment 2

[0034] The modified diatomite is prepared through the following steps:

[0035] Grind diatomite into powder, then add diatomite powder into a beaker containing sodium carbonate solution and stir evenly, then add saturated calcium chloride solution and stir evenly to obtain a mixed solution, filter the mixed solution with filter paper, and the filter residue remains In the beaker, the filter residue was dried, and then put into a muffle furnace for calcination. The reaction temperature of the muffle furnace was 550° C., and the reaction time was 4 hours to obtain modified diatomite.

Embodiment 3

[0037] The modified diatomite is prepared through the following steps:

[0038] Grind diatomite into powder, then add diatomite powder into a beaker containing sodium carbonate solution and stir evenly, then add saturated calcium chloride solution and stir evenly to obtain a mixed solution, filter the mixed solution with filter paper, and the filter residue remains In the beaker, the filter residue was dried, and then put into a muffle furnace for calcination. The reaction temperature of the muffle furnace was 550° C., and the reaction time was 5 hours to obtain modified diatomite.

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Abstract

The invention discloses a method for treating phosphorus-containing sludge, belonging to the technical field of sludge treatment. The method comprises the following steps that S1, the putting the phosphorus-containing sludge into a drying chamber, putting a dehydrating agent into the phosphorus-containing sludge, setting a temperature condition to be 70-90 DEG C, conducting drying for 4-6 hours so as to obtain dried phosphorus-containing sludge and collecting water lost from the phosphorus-containing sludge so as to obtain a sewage layer; S2, putting the phosphorus-containing sludge dried in the step S1 into an anaerobic tank, adding an efficient composite phosphorus removal agent into the anaerobic tank, collecting gas in the anaerobic tank by using an exhaust fan, and recycling the gas as an energy source; and S3, subjecting the sewage layer obtained in the S1 to standing for 10-20 min through a low-temperature cold treatment technology, then dividing the sewage layer into two layers, with an upper layer being an oil layer and a lower layer being a clear water layer, mixing the oil layer with compost to obtain a mixed fertilizer, and recycling water resources from the clear water layer. The treatment method has good settling dehydration performance on the phosphorus-containing sludge.

Description

technical field [0001] The invention belongs to the technical field of sludge treatment technology, and relates to a treatment method for phosphorus-containing sludge. Background technique [0002] At present, there are 5,464 urban sewage treatment plants in my country, with a total annual sludge output of about 40 million tons. The sludge produced per 10,000 tons of sewage is 8.5-9 tons. The treated clean sewage enters the environment together, and the effect of emission reduction is greatly reduced. For a long time, there has been a problem of "heavy water and light mud" in sewage treatment. Sludge disposal facilities are seriously insufficient, the rate of harmless disposal is low, the content of heavy metals in sludge is high, and the content of organic matter is low. There is no consensus on the agricultural use of sludge. The scope of land use is limited. It is gradually banned, and sludge incineration consumes a lot of waste and has been completely reduced, and has gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/13C02F11/04C02F1/40C02F11/148C02F101/10
CPCC02F11/13C02F11/04C02F1/40C02F11/148C02F2101/105
Inventor 沈小波张强
Owner 巢湖市爱华环保科技有限公司