KR880000583B1 - Preparation for flock accelator of waste water - Google Patents

Abstract

The nutrient composition of activated sludge for the treatment of waste water is prepd. by mixing fermentive materials, inoculated rice bran with bacillus substillus and bacillus natto, with the cultured material of yeast, and then adding some quantity of MgSo4, FeSo4 and CaCl2 to their mixture. In the process, COD, BOD and a pigment contained in waste water are decomposed within about 12-24hr, and an alkaline waste water of PH 7.0-10.5 can be effectively treated with the process.

Description

Method for preparing activated sludge nutrient composition for wastewater treatment

It has been a long time since the rapid development of the industry caused the pollution of the environment caused by the outflow of malignant wastewater, which is serious.

It is well known that industrial wastewater and urban sewage, which are one of the main causes of environmental pollution, seriously pollute rivers and rivers, which are important sources of drinking water for humans, and thus threaten the health of our people.

Methods for treating such waste materials can be classified into chemical, material, or microbiological methods.

The present invention enables treatment of wastewater by a microbiological method among the above methods, and relates to a method for producing activated sludge nutrition composition for wastewater treatment by culturing three kinds of microorganisms under specific conditions and mixing them.

As contaminated wastewater continues to flow through sewers, the microorganisms impregnated in the water are purged by decomposing and changing organic matter contained in the contaminated water by receiving oxygen from the outside air.

Artificially reproducing the principle of purification of contaminated water is called an active sludge method (microbial treatment).

The types of microorganisms that can be observed in the activated sludge method can be classified into three types, such as (1) bacteria, (2) protozoa, and (3) welfare animals. In particular, it is a well-known fact already described in the literature that bacteria play the most important role in decomposing and stabilizing organic matter in contaminated water to inorganic matter and forming a good settling floc.

Step-by-step look at the state of activity of microorganisms in wastewater.

First step: Since there are a lot of fine particles in the wastewater, bacteria and bacteria that adapt and act on them are generated.

The second stage: In order to consume these bacteria, flagella worms and swimming-type ciliated insects, which are appropriately shaped, grow considerably.

The third stage: many fixed-type creatures that attach to the mature mature Flock will appear.

In this way, it is possible to expect a purification effect of phase separation in the sedimentation tank by forming a flocculant having good sedimentation properties. As can be seen, it is directly involved in the decomposition of organic substances in wastewater. It is also well known that they break down the substrate and cause somatic cell synthesis by releasing a unique enzyme (Enzyme) for each substrate to crush the substrate (wastewater).

As described above, the present invention supplies enzymes and trace elements (MgSO ₄ , FeSo ₄ , CaCl ₂ ) which can decompose organic substances in the wastewater, thereby activating the propagation of fungi and at the same time contaminating water quality (wastewater). Its main purpose is to limit how to cleanse more effectively.

For example, conventional nutrients for wastewater treatment microorganisms simply add other inorganic nutrients such as C, N, P (carbon, nitrogen, phosphorus), thereby inducing the proliferation of fungi or protozoa. Due to the long time of adaptation, it has neglected a lot of time loss, and compared with the present invention, it takes considerable time, and in particular, it was incapable of dissolving the pigments of organic compounds that are difficult to decompose. The range of H adaptation was narrow (P. H 7.0-7.5 and below) and it was difficult to withstand the impact of toxic substances.

The present invention ideally administers high concentrations of various types of enzymes in the wastewater rather than eliminating deficiencies in nutrients known in the prior art or adding some enzymes to regenerate microorganisms. By dissolving and absorbing the substrate itself, COD, BOD, and pigments contained in the waste water (within 12 to 24 hours) are rapidly decomposed and produced. The wider application range (P. H 7.0-10.5) enables more effective treatment of malignant wastewater (alkaline wastewater).

Detailed description of the composition of the nutrient composition for wastewater treatment of the present invention and a method of manufacturing the same will be given below.

The present invention relates to a fermented product inoculated and fermented with Bacillus substillis in rice bran, and a powdery product obtained by mixing some (MgSo ₄ , FeSo ₄ , CaCl ₂ ), etc., with a culture inoculated with yeast.

The present invention as described above will be described in detail by process.

Step 1: (Production of fermented rice bran): Inoculate and sterilize Bacillus substillis seed, which has a wide range of P and H adaptability to 1 kg of rice bran, and has excellent secretion of cell membrane viscous material, which can form a good microbial sludge mass. 1 l of water was added to dissolve and stirred, and then 15 g of urea and 5-10 cc of phosphoric acid (phosphate: diluted with water = 1: 4) were administered. After stirring, the cells were incubated at 30-36 ° C. for 1 day. After 15g of urea and 10cc of phosphoric acid were added, the fermented product was finely evenly stirred on the third day, fermented for 2 more days, and then transferred to a drying box for 2 days.

Step 2: 1kg of rice bran is inoculated with Bacillus Notto seed, which has a wide adaptability to P. H and has excellent adaptability to high concentration salts and excellent secretion of cell membrane viscous material to form a good microbial flock. 1l of sterilized water was added to dissolve the solution, and then 15g of urea and 5-10cc of phosphoric acid (phosphate: diluted in water = 1: 4) were administered. After stirring, the cells were incubated at 30-36 ° C for 1 day, followed by 5kg of rice bran. 15 g of urea and 10 cc of phosphoric acid were added again while stirring, followed by incubation for 3 days. The fermented product was stirred evenly on the third day and further fermented for 2 days, and then transferred to a drying box for 2 days.

Step 3: Inoculate yeast fungus to 1kg of rice bran, add 1l of sterilized water and stir, add 5-10cc of phosphoric acid (phosphate: dilute with water = 1: 4) and increase rice broth 5 kg of the solution was further stirred and incubated at 30-36 ° C. for 3 days, and then transferred to a dry phase and dried for 2 days.

4th step: 50g of the culture of the first step, 25% of the culture of the second step, 25% of the culture of the third step, trace elements (MgSo ₄ , 0.1%, (FeSo ₄ ) 0.1%, (CaCl ₂ ) Mix and pulverize to 0.4% (weight unit%) and package it.

As described above, when the nutrient composition of the present invention described for each step is administered to various industrial wastewaters (Active sludge treatment method), Bacillus Sudstillis cultured in the first step has a wide range of P. H adaptability (PH 7.0). -10.5) In particular, it is excellent in adaptability to alkaline wastewater, and it secretes large amount of cell membrane viscous material to form good microbial flock, which makes phase separation easier and induces adsorption of particulate organic material. It will have a turbid effect on the removal of SS (floating matter).

In addition, since various enzymes, especially protease, are secreted from Bacillus bran medium, it is possible to effectively decompose synthetic resin wastewater, which is a polymer organic material in the wastewater.

And Bacillus Natto cultured in the second process (Bacillus Natto) is already well known to adapt to high concentrations of salts (since salt concentration 5%) can be expected to have a turbid effect in the treatment of marine product wastewater.

By adding and fermenting urea to the above process, it is possible to replenish the depleted nitrogen and increase the enzyme titer. The protease, which appears here, has an important effect of condensation and precipitation of organic substances in the protein system in wastewater. will be.

Yeast cultivated in the third step has the effect of removing the pigment in the randomness when it is present in the subtilis cultured in the first step and in the dye wastewater, and the temperature after administration of 1 g of the product of the present invention to 1 l of the dye wastewater Is the pigment removal action will appear in about 12-24 hours while maintaining about 28 ℃ -30 ℃.

And (MgSo ₄ , FeSo ₄ , CaCl ₂ ) added in the fourth step is added as a trace element required for the growth of microorganisms.

Claims (1)

The yeast culture was mixed with the fermentation product inoculated with Bacillus substillis in rice bran and the fermentation product inoculated with Bacillus Natto in rice bran, followed by stirring with addition of trace amounts of MgSo ₄ , FeSo ₄ , CaCl ₂ . Method for producing activated sludge nutritional composition for wastewater treatment, characterized by pulverizing and packaging products.