Method for removing pollutants in sewage

A pollutant and sewage technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems of human physical and mental health hazards, inability to remove pollutants, and microbial decomposition and utilization , to achieve the effect of less investment, easy operation and high bacterial activity

Inactive Publication Date: 2013-12-18
JIANGSU LV CHUAN ENVIRONMENTAL PROTECTION TECH
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AI-Extracted Technical Summary

Problems solved by technology

The composition of industrial sewage is relatively complex, especially a large number of artificially synthesized compounds entering the environment. Such substances are mainly ammonia nitrogen, sulfide and phosphorus-containing compounds. Due to the complexity of the structure of these substances, they cannot be decomposed and utilized by microorganisms in a short time. The traditional wastewater treatment method using activated sludge to cultivate and domesticate microorg...
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Abstract

The invention belongs to the technical field of environmental protection, and discloses a method for removing pollutants in sewage. A composite microbial inoculant is used in the method and comprises rhodococcusrhodochrous, thiobacillus denitrificans, pseudomonas stutzeri, sphingomonas, bacillus pumilus and phanerochaete chrysosporium. According to the method, the pollutants are mainly treated by using microorganisms, so that the pollutants containing ammonia, nitrogen, sulfur and phosphorus can be effectively removed, and the investment cost is low; the method has broad application prospect.

Application Domain

Multistage water/sewage treatment

Technology Topic

ChemistrySewage +15

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  • Method for removing pollutants in sewage

Examples

  • Experimental program(2)

Example Embodiment

[0022] Example 1
[0023] A method for removing pollutants in sewage, comprising the steps of:
[0024] Preparation of the composite bacterial agent: mix the mixed bacterial solution and the carrier according to the weight ratio of 1:1, stir evenly, then let it stand for 6 hours, and finally dry it at 4°C at low temperature, and control the water content to 6% after drying; The carrier is obtained by mixing bamboo charcoal, chitosan and diatomaceous earth according to the mass ratio of 2:2:1; the above-mentioned mixed bacteria liquid is mixed with the following raw material bacteria in parts by weight: 10 parts of Rhodococcus, 9 parts of Thiobacillus denitrifica, 7 parts of Pseudomonas stutzeri, 6 parts of Sphingomonas, 5 parts of Bacillus pumilus, 2 parts of Phanerochaete chrysosporium; 8 pcs/ml.
[0025] Sewage pretreatment: First, the sewage (NH3-N is 246mg/L, sulfide is 49mg/L, and phosphorus-containing pollutants is 37mg/L) is passed through a solid-liquid separator for solid-liquid separation to remove large solid particles, and then The liquid enters the sedimentation tank, settles for 12 hours, and then passes the liquid through a round-hole filter to remove solid flocs. The diameter of the round hole of the round-hole filter is 0.1mm.
[0026] Biological oxidation: the liquid passing through the round-hole filter enters the bioreaction tank, adjusts the pH to 7, and adds 10 grams of compound bacterial agent per cubic meter of liquid each time, once a day, continuously for one week, and finally stands for 3 day, drain the liquid. After testing, the contents of ammonia nitrogen, sulfur and phosphorus pollutants in the sewage were 3.8mg/L, sulfide 1.4mg/L, phosphorus pollutants 0.5mg/L, and the removal rate reached more than 97%.

Example Embodiment

[0027] Example 2
[0028] A method for removing pollutants in sewage, comprising the steps of:
[0029] Preparation of the composite bacterial agent: mix the mixed bacterial solution and the carrier according to the weight ratio of 1:1, stir evenly, then let it stand for 6 hours, and finally dry it at 4°C at low temperature, and control the water content to 6% after drying; The above-mentioned carrier is obtained by mixing bamboo charcoal, chitosan and diatomaceous earth according to the mass ratio of 2:2:1, wherein the particle size of the bamboo charcoal is 10 mesh; the above-mentioned mixed bacteria liquid is mixed by the following raw material bacteria in parts by weight: 10 parts, 9 parts of Thiobacillus denitrification, 7 parts of Pseudomonas stutzeri, 6 parts of Sphingomonas, 5 parts of Bacillus pumilus, 2 parts of Phanerochaete chrysosporium; control in 2×10 8 Individual/ml; Rhodococcus is Rhodococcus rhodochrous ATCC15906; Thiobacillus denitrificans is ATCC25259; Pseudomonas stutzeri is Pseudomonas stutzeri CCTCC NO: M209107 Sphingomonas is sphingomonas (Sphingomonas sp.) CGMCC NO.4589; Bacillus pumilus is Bacillus pumilus ATCC27142; (Phanerochaete chrysosporium) ATCC24725.
[0030] Sewage pretreatment: First, the sewage is passed through a solid-liquid separator for solid-liquid separation to remove large solid particles, then the liquid enters the sedimentation tank and settles for 12 hours, and then the liquid is passed through a round hole filter to remove solid flocs, round holes The hole diameter of the filter is 0.1mm,
[0031] Biological oxidation: the liquid passing through the round-hole filter enters the bioreaction tank, adjusts the pH to 7, and adds 10 grams of the above-mentioned compound bacterial agent per cubic meter of liquid, once a day, continuously for one week, and finally Let stand for 3 days and drain the liquid. After testing, the comparison of pollutant content before and after the treated sewage is shown in Table 1:
[0032] Table 1
[0033]
[0034] Conclusion: After the treatment process of the present invention, the content of various pollutants in the sewage is greatly reduced, fully meets the discharge standard, and avoids environmental pollution.

PUM

PropertyMeasurementUnit
Particle size10.0mesh

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