Domestic-wastewater efficient nitrogen-and-phosphorus-removal treatment method

A domestic wastewater, nitrogen and phosphorus removal technology, applied in the direction of biological water/sewage treatment, water/sewage treatment, adsorption water/sewage treatment, etc., can solve the problems of difficult treatment, high operation cost, high economic operation cost, etc., and achieve change The effect of carbonization and activation reaction, high efficiency of nitrogen and phosphorus removal, and good adsorption effect

Inactive Publication Date: 2016-12-07
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages of the flocculation-sedimentation method are that a large amount of flocculant needs to be added, the economic operation cost is high, and a large amount of sludge that is difficult to handle is produced, which is easy to cause secondary pollution
Due to the complex process, high management requirements, unstable denitrification and phosphorus removal effect, and the effluent quality sometimes failing to meet the standards, the biological method still has certain difficulties and limitations in effective deep nitrogen and phosphorus removal.
The adsorption method overcomes the shortcomings of high operating cost, large amount of sludge that is difficult to handle, and unstable operation. It is currently one of the most effective methods for denitrification and phosphorus removal of wastewater with low investment in research and development, low operating costs, and simple operation and management. If the adsorbent used in the adsorption treatment method is improper, it will easily cause secondary pollution to the water body and increase the cost of wastewater treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A treatment method for efficient denitrification and dephosphorization of domestic wastewater, the method comprising the following steps:

[0027] (1) Preparation of phosphorus removal adsorbent:

[0028] a) drying and crushing the sludge into sludge powder, uniformly mixing the pyrolusite powder and the sludge powder to obtain a mixed powder, wherein the consumption of the pyrolusite powder is 0.1% of the total mass of the mixed powder;

[0029] b) Add a composite activator composed of zinc chloride solution and dilute sulfuric acid solution with a volume ratio of 2:1 to the mixed powder, stir evenly, ultrasonicate for 6 hours at 800W power, and then activate in an oven at 80°C for 75 hours. Then burn and carbonize in a tube furnace at 500°C for 7 hours, and finally wash with cooling water until neutral, dry and grind through a 200-300 mesh sieve to obtain a phosphorus removal adsorbent, wherein the concentration of zinc chloride solution is 1mol / L, dilute sulfuric aci...

Embodiment 2

[0034] A treatment method for efficient denitrification and dephosphorization of domestic wastewater, the method comprising the following steps:

[0035] (1) Preparation of phosphorus removal adsorbent:

[0036] a) drying and crushing the sludge into sludge powder, uniformly mixing the pyrolusite powder and the sludge powder to obtain a mixed powder, wherein the consumption of the pyrolusite powder is 5% of the total mass of the mixed powder;

[0037] b) Add a composite activator composed of zinc chloride solution and dilute sulfuric acid solution with a volume ratio of 7:1 to the mixed powder. After stirring evenly, ultrasonicate at 1200W for 1h, and then place it in an oven at 140°C for 30h. Then burn and carbonize in a tube furnace at 700°C for 1.5h, and finally wash with cooling water until neutral, dry and grind through a 200-300 mesh sieve to obtain a phosphorus removal adsorbent, wherein the concentration of zinc chloride solution is 6mol / L, dilute The mass concentrati...

Embodiment 3

[0042] A treatment method for efficient denitrification and dephosphorization of domestic wastewater, the method comprising the following steps:

[0043] (1) Preparation of phosphorus removal adsorbent:

[0044] a) drying and crushing the sludge into sludge powder, uniformly mixing the pyrolusite powder and the sludge powder to obtain a mixed powder, wherein the consumption of the pyrolusite powder is 1.2% of the total mass of the mixed powder;

[0045]b) Add a composite activator composed of zinc chloride solution and dilute sulfuric acid solution with a volume ratio of 3:1 to the mixed powder, stir evenly, ultrasonicate at 900W power for 5h, and then place it in an oven at 100°C for 60h activation. Then burn and carbonize in a tube furnace at 550°C for 6 hours, and finally cool and wash to neutral, dry and grind through a 200-300 mesh sieve to obtain a phosphorus removal adsorbent, in which the concentration of zinc chloride solution is 2mol / L, dilute sulfuric acid The mass...

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PUM

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Abstract

The invention discloses a domestic-wastewater efficient nitrogen-and-phosphorus-removal treatment method. The method includes the following steps that domestic wastewater is oxidized and enters a filtering pond filled with quartz sand and limestone for filtering; the filtered wastewater enters an aeration zeolite biological tank and is subjected to adsorption nitrogen-and-phosphorus-removal treatment through zeolite; the treated wastewater is injected into a flocculation settling pond for flocculation settling treatment; the water obtained after flocculation settling treatment enters a phosphorus-removal settling pond for phosphorus-removal treatment, the treated water is chlorinated, and purified water is obtained. By means of the method, nitrogen and phosphorus in domestic wastewater can be effectively removed, it can be prevented that domestic wastewater is directly discharged and pollutes the environment, secondary pollution can be avoided, and the treatment cost is low.

Description

Technical field: [0001] The invention relates to the field of waste water treatment, in particular to a treatment method for efficient denitrification and phosphorus removal of domestic waste water. Background technique: [0002] A large amount of sewage containing nitrogen, phosphorus and inorganic salts produced by human activities enters the water body, increasing the nutrients in the water body and promoting the vigorous growth of autotrophic organisms. With the development of eutrophication, the number of individual algae increased rapidly, while the species gradually decreased. The growth period of algae is short, the reproduction speed is very fast, and the dead aquatic organisms decompose under the action of microorganisms, continuously consume oxygen, or produce hydrogen sulfide under anaerobic conditions, which continuously deteriorates the water quality. Therefore, the above series of changes are all caused by the increase of algae, and the increase of algae is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/28C02F1/58B01J20/20B01J20/30
CPCB01J20/0222B01J20/20C02F1/28C02F1/281C02F1/283C02F1/50C02F1/5236C02F1/56C02F1/722C02F3/02C02F3/107C02F9/00
Inventor 王文庆
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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