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Composite microbial flocculating agent used for disposal of raw water of tap water and preparation and use method thereof

A technology of composite microorganisms and flocculants, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the impact of human health and ecological environment, metal corrosion, color, etc. problems, to achieve good functional coordination, ensure coordination, and save costs

Inactive Publication Date: 2019-02-19
重庆两江水务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, iron salts have a corrosive effect on metals and can also cause color in the water, and high concentrations of iron will have adverse effects on human health and the ecological environment.

Method used

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  • Composite microbial flocculating agent used for disposal of raw water of tap water and preparation and use method thereof
  • Composite microbial flocculating agent used for disposal of raw water of tap water and preparation and use method thereof
  • Composite microbial flocculating agent used for disposal of raw water of tap water and preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of the composite microbial flocculant used for tap water raw water treatment comprises the following steps:

[0035] Step 1. Strain preparation: prepare one strain each of Bacillus subtilis, Bacillus megaterium, Bacillus amyloliquefaciens, Lactobacillus paracasei, Lactococcus lactis, and saccharomyces;

[0036] Step 2, strain activation: Bacillus subtilis, Bacillus megaterium, and Bacillus amyloliquefaciens are activated into original species with nutrient gravy liquid medium (for example, LB broth medium) respectively; Lactobacillus casei, Lactococcus lactis respectively Activate the original species with lactic acid bacteria liquid medium; activate the original species with wort liquid medium for yeast;

[0037] Step 3. Expansion of culture: Inoculate the original seed liquid activated in the above steps into the corresponding medium for shaking culture, and then ferment in batches in a fermenter. When the total number of microorganisms is great...

experiment example 1

[0039] Experimental case 1: Bacterial liquid ratio test

[0040] According to the orthogonal experiment design and comprehensive consideration of factors such as the cultivation process, the experimental design and data of the ratio of bacteria in the raw water treatment of tap water are shown in Table 1:

[0041] Table 1 Bacterial Solution Proportion Comparison

[0042]

[0043]

[0044] It can be seen from the first group of experiments in Table 1 that when the proportion of saccharomycetes exceeds 20%, due to the excessive saccharomyces, it is easy to produce alcohols, inhibit the growth of other bacterial species, and the coordination effect is not good; the final flocculation The turbidity removal rate of the agent is relatively low, only 77.33%.

[0045]It can be seen from the experiments of groups 6 and 7 in Table 1 that when the proportion of yeast is less than 10%, the turbidity removal rate reaches more than 88%, which is relatively high. However, the cost in...

experiment example 2

[0053] Experimental case 2: application test of composite microbial flocculant

[0054] The flocculant is continuously added to the tap water raw water treatment simulation device. The total amount of flocculant is 0.05% of the tap water raw water intake. The residence time of the raw water in the design reaction sedimentation tank is 2 hours. The raw water of the experiment is the raw water of the Yangtze River. Monitor and detect the turbidity of water quality before and after adding the compound microbial flocculant, see Table 3:

[0055] Table 3 Index before and after adding compound microbial flocculant

[0056] project

Turbidity (NTU)

Turbidity removal rate (%)

CODcr removal rate (%)

Raw water from the Yangtze River

56.7

0

0

Water out before dosing

40.8

28.04

14.6

Water after dosing

2.3

95.94

68.7

[0057] It can be seen from Table 3 that after adding the composite microbial flocculant, the remova...

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Abstract

The invention relates to the technical field of disposal of raw water and specifically discloses a composite microbial flocculating agent used for disposal of raw water of tap water. The flocculatingagent is prepared from, by volume, 15-20% of bacillus subtilis, 15-20% of bacillus megaterium, 15-20% of bacillus amyloliquefaciens, 15-20% of lactobacillus paracasei, 10-15% of lactococcus lactis and10-15% of saccharomycetes. The microbial flocculating agent provided by the scheme is used for disposal of the raw water, an internal coordination and mutual promotion effect is achieved, and the turbidity removal rate is high.

Description

technical field [0001] The invention relates to the technical field of raw water treatment, and specifically discloses a composite microbial flocculant for raw water treatment of tap water and a preparation and use method thereof. Background technique [0002] In the raw water treatment of tap water, the main agent added to remove suspended solids and colloids in the raw water is called flocculant. Most of the flocculants used in waterworks in my country are basically inorganic chemical flocculants, especially aluminum salts and iron salts. According to literature reports: when the aluminum content in water reaches 0.2 mg / L, frogfish can be lethal; clinically, aluminum poisoning mainly includes aluminum encephalopathy, aluminum bone disease and aluminum anemia, etc., and Alzheimer's disease is one of aluminum venereal diseases kind. Iron salts have a corrosive effect on metals and can also cause color in the water, and high concentrations of iron will have adverse effects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34
CPCC02F3/34C02F3/347
Inventor 杨武成钟铃蓉杨平
Owner 重庆两江水务有限公司
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