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A method of joint treatment of black and odorous water by using indigenous microbial film and microalgae

A microbial membrane and combined treatment technology, applied in biological water/sewage treatment, filtration treatment, sedimentation treatment, etc., can solve problems such as difficulty in maintaining stable water quality, low treatment efficiency, and power consumption in operation, and achieve manpower saving and strong treatment capacity , The effect of improving the removal rate

Active Publication Date: 2022-04-22
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Physical methods include environmental water diversion, sediment dredging, and artificial aeration. These methods can dilute black and odorous water and increase the dissolved oxygen content in water, but the operation consumes electricity, the treatment efficiency is low, and it is difficult to maintain the stability of the water quality after treatment; chemical methods Including flocculation and sedimentation, chemical algae killing and adding iron / aluminum salts, etc. These methods can effectively remove nitrogen and phosphorus in black and odorous water, but the medicines are expensive and easy to cause secondary pollution

Method used

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  • A method of joint treatment of black and odorous water by using indigenous microbial film and microalgae
  • A method of joint treatment of black and odorous water by using indigenous microbial film and microalgae
  • A method of joint treatment of black and odorous water by using indigenous microbial film and microalgae

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Embodiment 1

[0023] A method for jointly treating black and odorous water using indigenous microbial film and microalgae, comprising the following steps:

[0024] 1) Collect black and odorous water, use potassium dichromate method to test the COD content in the black and odorous water is 210mg / L; The content of TP in the black and odorous water is 5.8 mg / L by ammonium acid spectrophotometry; the NH in the black and odorous water is tested by Nessler's reagent spectrophotometry 3 -N content is 143.2mg / L;

[0025] 2) Put the black and odorous water after the test in step 1) into the adjustment tank 1 for precipitation, and then pump it into the contact oxidation tank 3 with sediment through the inlet pump 2, and carry out biological oxidation in the biological contact oxidation tank 3. Co-cultivation of indigenous microbial film pretreatment by contact oxidation method. In the pretreatment process of co-cultivation of indigenous microbial film by biological contact oxidation method, rice wa...

Embodiment 2

[0032] Embodiment 2: except following difference, other is the same as embodiment 1.

[0033] Haematococcus pluvialis was inoculated in the solution in the photobioreactor, and the inoculated amount of Haematococcus pluvialls was 125,000 cells / mL. The dissolved oxygen concentration of the solution in the gas-controlled photobioreactor was 3mg / L, 5mg / L, 8mg / L, and the light intensity of the LED lamp was 3000Lx. Analyze the effect of UV-induced Haematococcus pluvialis on TN, TP under different dissolved oxygen concentrations. removal rate.

[0034] It has been tested that under the condition of light intensity of 3000Lx and inoculation volume of 125,000 cells / mL, high dissolved oxygen concentration promotes the growth of aerobic microorganisms in water. A large number of aerobic bacteria carry out aerobic respiration and use molecular oxygen as the electron acceptor in the biological oxidation process. Therefore, the growth and reproduction of bacteria lead to an increase in th...

Embodiment 3

[0038] Embodiment 3: except following difference, other is with embodiment 1.

[0039] Haematococcus pluvialis was inoculated in the solution in the photobioreactor. During the intensive experiment, the dissolved oxygen concentration in the photobioreactor solution was controlled to be 5mg / L by intermittent aeration with the gas pump and the aeration head b, and the light intensity of the LED lamp was 3000Lx. The removal rate of algae to TN and TP.

[0040] Such as Figure 5 As shown, the inoculation amount is large, and the high cell density will reduce the concentration of nutrients in the medium, resulting in the transformation of bacteria and microalgae from a symbiotic relationship to a competitive relationship. At the same time, excessive bacterial toxins cause a large number of microalgae to die, and assimilated macromolecular compounds such as nitrogen, phosphorus, and organic matter are released. For microalgae with too small cell density, high concentration of med...

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Abstract

The invention discloses a method for jointly treating black and odorous water by using indigenous microbial membranes and microalgae, including a pretreatment process for co-cultivating indigenous microbial membranes by biological contact oxidation: pretreating black and odorous water through contact oxidation, and simultaneously cultivating Indigenous microorganisms, under the action of abundant microorganisms, through a series of biochemical reactions such as nitrosation, nitrification and denitrification, finally form nitrogen out of the water body, thereby reducing the ammonia nitrogen content in the water body and improving the water quality; microalgae enhanced treatment: the pretreatment The final effluent is treated with microalgae intensified treatment, which can realize the purification and reuse of black and odorous water; the black and odorous water is pretreated by contact oxidation and co-cultured with indigenous microbial membranes, and then inoculated with UV-induced Haematococcus pluvialis M1 for further purification Water quality: Haematococcus pluvialis can be transformed from green vegetative cells into red hard-shelled spores under stress conditions (strong light, nitrogen deficiency), making it an indicator organism for verifying the treatment degree of black and odorous water.

Description

technical field [0001] The invention relates to the technical field of water environment treatment, in particular to a joint treatment process using indigenous microbial membranes and microalgae for the biodegradation of nitrogen, phosphorus and organic matter in black and odorous water. Background technique [0002] With the continuous development of economy and society, a large amount of industrial wastewater and domestic sewage flow into rivers. Although they are treated and discharged, they will still cause a sharp increase in the content of nutrients such as nitrogen and phosphorus in the water body, resulting in eutrophication of the water body. The low concentration of dissolved oxygen leads to incomplete degradation of organic matter, and the anoxic and anaerobic environment makes the water tend to be black and smelly. Black and odorous water has become a major threat to the safety of the water environment. Moreover, nutrients, high concentrations of biodegradable o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/16C02F101/30
CPCC02F9/00C02F2101/16C02F2101/105C02F2101/30C02F2001/007C02F3/325C02F1/001C02F3/02C02F2209/08C02F2209/14C02F2209/18
Inventor 卢杰王晓焱李娜宋万超张惠丁金成王梦英
Owner SHANDONG UNIV OF TECH
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