Method of raw milk purification from toxic metals

FIELD: food industry.

SUBSTANCE: this invention covers method of raw milk purification from toxic metals and includes adding of a sorbent agent, purification from sorbent agent, herewith raw milk intoxicated with metals in (1.1…4.0)±0.1 MAC concentration undergoes purification. Purification is performed until 0.5 MAC ratio is reached; contact with a sorbent agent is performed at 6°C, 5 minutes with mixing. Purification from a sorbent agent is performed by a centrifugal method at the separator-milk purifier for cold purification, herewith grapheme powder of 0.1:1000 ratio is used as a sorbent agent.

EFFECT: decrease of toxic metals concentration in raw milk to (95…97)±1% degree of purification.

1 dwg, 2 tbl, 2 ex

 

The invention relates to the dairy industry, in particular to the cleaning of milk as raw material, contaminated with toxic metals in concentrations (1,1...4,0)±0,1 MAC, up to a concentration of 0.5 MPC and below that will allow you to send the entire amount received on dairy enterprise milk-raw materials for the production of ecologically pure dairy products.

To toxic metals, most commonly found in milk include cadmium, lead, chromium, aluminum, arsenic [1, 2, 3]. Cadmium, getting into the human body from numerous sources, have mutagenic, carcinogenic, toxic effect. Cadmium is a potent toxic carcinogenic element which commulative accumulates in the body throughout life, mainly in the liver and kidneys, and is difficult to eliminate from them. When the separation of milk 95% of cadmium enters skim milk. Poisoning by cadmium are usually chronic in healthy people, periodically manifesting symptoms (irritability, sleep disturbances, headaches), with a high risk of late effects associated with brain damage.

Lead is the main anthropogenic element from the group of heavy metals due to the high industrial pollution and emissions of road transport [4]. Lead is one of the most well-known poison is m and among modern toxicants plays a very important role [2, 5].

The main targets when exposed to lead are hematopoietic, nervous and digestive system, and kidneys. Acute lead poisoning is manifested in the form of gastrointestinal disorders. Followed by loss of appetite, dyspepsia, constipation may follow colic. Lead poisoning can cause serious health problems, manifested in frequent headaches, dizziness, fatigue, irritability, poor sleep, muscle hypotonia, and in the most severe cases, paralysis and paresis, mental retardation.

Chromium in small quantities is found in most foods and drinks. The chromium poisoning causes damage to the kidneys and liver, ulcers, allergic eczema and other forms of dermatitis, lung cancer and upper respiratory tract [3, 6].

Aluminum is the most abundant metal. In renal failure due to accumulation in the body is aluminum, the possible processes metabolism of calcium, magnesium and phosphorus. With a significant increase in the aluminum content in food products is observed speech and orientation [3, 6].

Arsenic is widely distributed in the environment. It is found in all soils, as used in agriculture and is present in most foods. Arsenic is present in almost all freshwater is water.

Poisoning by arsenic leads to loss of appetite and weight, gastrointestinal disorders, peripheral nervous disorders, conjunctivitis, hyperkeratosis, and skin melanoma [3, 6].

Closest to the invention is a method of purification of milk raw materials from lead [7] through the use of powder paliparan as sorbent. Powder paliparan is introduced into the milk in a ratio of from 0.3:1000, the contact is carried out at a temperature of 6°C for 20 min under stirring, then cleaned from the remnants of the sorbent centrifugal separator-molotovcoketail.

The main disadvantages of this method of purification of milk-raw materials are the low efficiency of the sorbent, incomplete cleaning of lead, the concentration of residual elements in the non-fatty milk, whey, buttermilk, which in many cases is a barrier to recycling.

The invention consists in that the cleaning machines milk-raw, contaminated with toxic metals concentration (1,1...4,0)±0,1 MPC, cleaning is performed to a concentration of 0.5 MPC and lower contact with the adsorbent is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal separator-molotovcoketail for cold cleaning.

The objective of the invention is to develop a way clear and milk-raw materials contaminated with toxic metals concentration (1,1...4,0)±0,1 MAC, up to a concentration of 0.5 MPC and below.

The technical result is reflected in the decrease in the concentration of toxic metals in milk-raw materials during purification (95...97)±1%, which will allow you to send the entire amount received on dairy enterprise milk-raw materials, regardless of the initial content of toxic metals, for the production of dairy products.

The technical result is achieved by the fact that, as a sorbent use graphene powder in the ratio of 0.1:1000; contact with the adsorbent is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal separator-molotovcoketail for cold cleaning.

The proposed method is as follows: in the milk raw material contaminated with toxic metals concentration (1,1...4,0)±0,1 MAC, make sorbent (powder graphene) in the ratio of 0.1:1000, the contact is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal separator-molotovcoketail.

Example 1. Milk-raw materials containing lead at a concentration of 1.25±0,1 MAC, cadmium at a concentration of 1,1±0,1 MAC, aluminum at a concentration of 2.0 ▒ 0.1 MPC and chromium at a concentration of 1,0±0,1 MAC make sorbent (powder graphene) in the ratio of 0:1000, the contact is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal separator-molotovcoketail.

In a purified milk determine the content of toxic metals by Stripping voltammetry method on the device "TA-2 GOST R 51301-99.

Table 1
The content of toxic metals in the original milk and milk cleaned sorbent (powder graphene)
The content of toxic metals in milk-rawThe number of grapheneThe duration of the contact, minThe content of toxic metals in milk-rawThe degree of purification, %
MACmg/DM3MACmg/DM3
lead
1,25±0,10,125±0,0320,1±0,0150,06±0,010,006±0,01cadmium
1,1±0,10,033±0,090,1±0,0150,06±0,010,0018±0,0195±1
chrome
1,0±0,10,1±0,0180,1±0,0150,05±0,010,005±0,00295±1
aluminum
2,0±0,10,2±0,0160,1±0,0150,06±0,010,006±0,00197±1

From table 1 it follows that the content of toxic elements is reduced, the degree of purification is(95...97)±1%.

Example 2. Milk-raw materials containing lead in concentrations 3,88±0,1 MAC, cadmium at a concentration of 3.0±0,1 MAC, aluminum in a concentration of 2.5±0,1 MAC and arsenic at a concentration of 2.0 ▒ 0.1 MPC contribute sorbent (powder graphene) in the ratio of 0.1:1000, the contact is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal SPO is obom separator-molotovcoketail.

In a purified milk determine the content of toxic metals by Stripping voltammetry method on the device "TA-2 GOST R 51301-99.

Table 2
The content of toxic metals in the original milk and milk cleaned sorbent (powder graphene)
The content of toxic metals in milk-rawThe number of grapheneThe duration of the contact, minThe content of toxic metals in milk-rawThe degree of purification, %
MACmg/DM3MACmg/DM3
lead
3,88±0,10,388±0,0890,1±0,0150,12±0,10,012±0,00997±1
cadmium
3,0±0,1 0,093±0,00230,1±0,0150,15±0,010,0048±0,00295±1
arsenic
2,0±0,10,2±0,080,1±0,0150,06±0,010,006±0,00297±1
aluminum
2,5±0,10,2±0,0160,1±0,0150,1±0,010,001±0,00596±1

From table 2 it follows that the content of toxic elements is reduced, the degree of purification is(95...97)±1%.

Sources of information

1. Modern medical encyclopedia. Ed. Rbaro. - SPb.: NORINT, 2003. - 1236 S.

2. The nutrition - 2001. No. 6. - P.19-23.

3. Food chemistry. Ed. Nechaev A.P. - SPb.: GIARD, 2003. - 640 S.

4. http://window.edu.ru/window_caratog/pdf2txt?p_id=1399&p_page=6

5. http://www.vodavita.ru/vodosnabgenie/gsmf

6. Donchenko L.V., Nadykto E safety of food products. - M.: Pishepromizdat, 2001. - 528 S.

7. P the tent RU # 2326549 C2, CL A23L 1/015, 2006. The method of purification of milk as raw material from the lead.

The method of purification of milk as raw material, contaminated with toxic metals, including the introduction of milk-raw sorbent, wipe from the sorbent, and cleaning machines milk-raw, contaminated with toxic metals concentration (1,1...4,0)±0,1 MPC, cleaning is performed to a concentration of 0.5 MPC and lower contact with the adsorbent is carried out at a temperature of 6°C for 5 min under stirring, clean sorbent carry out centrifugal separator-molotovcoketail for cold cleaning, characterized in that the sorbent use graphene powder in the ratio of 0.1:1000.



 

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