阅读说明：本技术 蛋白胨除铬 (Chromium removal from peptone ) 是由 周伯超 于 2021-01-14 设计创作，主要内容包括：本发明涉及蛋白胨除铬技术领域,且公开了蛋白胨除铬,对固体蛋白胨进行溶解,用纯水配置成饱和蛋白胨溶液,并针对溶液的高浊度,高有机物质等进行相应处理,对含蛋白胨过滤澄清溶液进行高COD一级、二级除COD处理,对含蛋白胨透析液进行了高COD一级除铬处理,对脱除铬离子的透析液进行浓缩,进行了除铬处理后的透析液通过浓缩脱水,产出的纯水继续蛋白胨透析,浓缩的有机溶液加入高一、二级浓缩脱水处理系统截留下的蛋白胨浓液,对蛋白胨浓液进行浓缩脱水,多效蒸发得到蛋白胨固体,通过溶解、分离、脱除、浓缩、蒸发的过程,固体蛋白胨中的铬离子会被大量脱除,通过多级除铬离子交换系统达到要求的脱除率,达到除铬工艺要求的脱除效果。(The invention relates to the technical field of peptone chromium removal, and discloses a peptone chromium removal method, which comprises the steps of dissolving solid peptone, preparing saturated peptone solution by using pure water, carrying out corresponding treatment aiming at high turbidity, high organic substances and the like of the solution, carrying out high COD (chemical oxygen demand) primary and secondary COD removal treatment on peptone-containing filtered and clarified solution, carrying out high COD primary chromium removal treatment on peptone-containing dialyzate, concentrating the chromium ion-removed dialyzate, carrying out concentration and dehydration on the chromium-removed dialyzate, continuing peptone dialysis on the produced pure water, adding concentrated organic solution into concentrated peptone solution intercepted by a primary and secondary concentration and dehydration treatment system, concentrating and dehydrating the peptone concentrated solution, carrying out multi-effect evaporation to obtain peptone solid, and removing a large amount of chromium ions in the solid peptone through the processes of dissolution, separation, removal, concentration and evaporation, the required removal rate is achieved through a multistage chromium removal ion exchange system, and the removal effect required by a chromium removal process is achieved.)

1. The chromium removal of peptone is characterized by comprising the following steps:

1) dissolving solid peptone, preparing saturated peptone solution by pure water, and treating, wherein the peptone solution is treated correspondingly to high turbidity, high organic substances and the like of the solution.

2) The first-level and second-level COD removal treatment is carried out on the filtered and clarified solution containing the peptone, and the first-level chromium removal treatment is carried out on the treated dialysate containing the peptone.

3) And (3) concentrating the dialysate without chromium ions, concentrating and dehydrating the dialysate subjected to chromium removal treatment, and continuously dialyzing the produced pure water for peptone.

4) Adding the concentrated organic solution into peptone concentrated solution intercepted by the primary and secondary concentrating and dehydrating treatment systems, concentrating and dehydrating the peptone concentrated solution by using a high-pressure concentrating system, and performing multi-effect evaporation to obtain peptone solid.

2. The peptone dechromization according to claim 1, characterized in that the treatment of the high turbidity and high organic substances of the solution in step 1 is mainly carried out by a high organic substance ultrafiltration system composed of acid and alkali resistant inorganic zirconia special membrane elements.

3. Peptone chromium removal according to claim 1, characterized in that said primary and secondary COD removal treatment in step 2 is constituted by the combination of two membrane elements YLQ-1 and YLQ-2.

4. Peptone decolouring according to claim 1, characterized in that in step 2 said high COD primary decolouring is carried out by ion exchange to remove chromium ions.

5. Peptone decolourisation according to claim 1, characterized in that said: in the step 4, the primary and secondary high COD concentration and dehydration treatment is formed by combining two membrane elements of YLQ-3 and YLQ-4.

Technical Field

The invention relates to the technical field of peptone chromium removal, in particular to peptone chromium removal.

Background

Peptone is an organic compound, which is a pale yellow powder obtained by hydrolyzing meat, casein or gelatin with an acid or a protease and drying the hydrolyzed product, and has a special smell of meat flavor. The protein can also form peptone after being decomposed by acid, alkali or protease, the peptone is rich in organic nitrogen compounds and also contains some vitamins and saccharides, can be used as a main raw material of a microorganism culture medium, has large dosage in the fields of antibiotics, medical industry, fermentation industry, biochemical products, microbiological research and the like, and can be used for treating digestive tract diseases, and the peptone raw material has the following general components: contains 14.65 percent of total nitrogen, 0.09 percent of total phosphorus, 3.54 percent of amino nitrogen, 5.61 percent of PH and 127.9 mg/kg of chromium.

In the existing peptone chromium removal process, the operation of chromium removal is greatly influenced by the limitation of strong oxidizing property and corrosivity of sulfuric acid and liquid caustic soda, and organic matters are easily polluted and blocked in the long-term use process, so that the subsequent use is influenced, and further the chromium removal efficiency is influenced.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a peptone for removing chromium, which has the advantages of high efficiency in chromium removal, convenient operation and the like, and solves the problems that the operation of chromium removal is influenced by the limitation of strong oxidizing property and corrosivity of sulfuric acid and liquid alkali, and the organic matters are easy to block in the long-term use process, the subsequent use is influenced, and the chromium removal efficiency is further influenced.

(II) technical scheme

In order to realize the purposes of efficient chromium removal and convenient operation, the invention provides the following technical scheme: the solid peptone is obtained by carrying out corresponding treatment on the dissolution of the solid peptone, the high turbidity of the solution, high organic substances and the like, carrying out primary chromium removal treatment on high COD (chemical oxygen demand) of the peptone dialysate, and carrying out concentration dehydration and multi-effect evaporation on the peptone concentrated solution.

Preferably, the treatment of the high turbidity and the high organic substances of the solution in the step 1 is mainly carried out by a high organic substance ultrafiltration system composed of an acid and alkali resistant zirconium oxide special membrane element.

Preferably, the primary and secondary COD removal treatment in step 2 is formed by combining two membrane elements of YLQ-1 and YLQ-2.

Preferably, the high COD primary chromium removal in the step 2 adopts an ion exchange method to remove chromium ions.

Preferably, the high COD primary and secondary concentration and dehydration treatment in the step 3 is formed by combining two membrane elements of YLQ-3 and YLQ-4.

The invention aims to solve another technical problem of providing peptone for removing chromium, which comprises the following steps:

1) dissolving solid peptone, preparing saturated peptone solution by pure water, and treating, wherein the peptone solution is treated correspondingly to high turbidity, high organic substances and the like of the solution.

2) The first-level and second-level COD removal treatment is carried out on the filtered and clarified solution containing the peptone, and the first-level chromium removal treatment is carried out on the treated dialysate containing the peptone.

3) And (3) concentrating the dialysate without chromium ions, concentrating and dehydrating the dialysate subjected to chromium removal treatment, and continuously dialyzing the produced pure water for peptone.

4) Adding the concentrated organic solution into peptone concentrated solution intercepted by the primary and secondary concentrating and dehydrating treatment systems, concentrating and dehydrating the peptone concentrated solution by using a high-pressure concentrating system, and performing multi-effect evaporation to obtain peptone solid.

(III) advantageous effects

Compared with the prior art, the invention provides the chromium removal of peptone, which has the following beneficial effects:

the peptone chromium removal process comprises the steps of dissolving, separating, removing, concentrating and evaporating, wherein chromium ions in the solid peptone can be removed in a large amount, the required removal rate is achieved through a multistage chromium removal ion exchange system, the removal effect required by the chromium removal process is achieved, the system can achieve a good cleaning and recovery effect on the pollution and blockage of organic protein, and a good effect is achieved on reducing the turbidity of stock solution. The high organic matter ultrafiltration system adopts an acid and alkali resistant inorganic zirconium oxide special membrane element, can effectively reduce turbidity in the environment of about 20% of organic matter solution, has a key effect on the reduction of turbidity in the solution due to the 50-nanometer filtering precision, can be used for a long time in the solution with the organic matter content of more than 20%, can be repeatedly cleaned by high-concentration sulfuric acid and alkali solution, does not need to consider the strong oxidizing property and the corrosivity of sulfuric acid and liquid alkali, can be restored by a burning method due to the characteristics of an inorganic membrane after pollution blockage, and has very good restoration property.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

1) dissolving solid peptone, preparing saturated peptone solution by using pure water, then treating, and carrying out corresponding treatment aiming at high turbidity, high organic substances and the like of the solution, wherein the high turbidity and high organic substances of the solution are treated by mainly adopting a high organic substance ultrafiltration system consisting of acid and alkali resistant inorganic zirconia special membrane elements;

2) the high COD first-stage and second-stage COD removal treatment is carried out on the peptone-containing filtered and clarified solution, the high COD first-stage COD removal treatment system effectively solves the problem of interception of a large amount of peptone in stock solution, and a large amount of pure water is added for dialysis, so that the hexavalent chromium is separated from high-molecular-weight polytitanium and amino acid substances in the peptone. The high COD secondary COD removal treatment system solves the interception of a small amount of peptone in the dialyzate, and separates the medium molecular weight multi-titanium and amino acid substances of hexavalent chromium in the peptone. Certain separated dialysate flux is ensured, a large amount of dialysate is treated on the premise of improving the separation precision, the treated peptone-containing dialysate is subjected to high COD primary dechromization treatment, a high COD primary dechromization treatment system can remove and separate a large amount of chromium ions in the secondary dialysate by an ion exchange method, the chromium ions with certain concentration are removed from the dialysate, the COD content in the dialysate is greater than 7 PPM, and the dechromization resin in the high COD stock solution has a corresponding effect. Through tests, the removal efficiency of the first-stage chromium is 84%, if the removal effect of chromium needs to be improved, the ion exchange frequency of the dialysate at the rear section can be increased, the first-stage and second-stage COD removal treatment with high COD is formed by combining two membrane elements of YLQ-1 and YLQ-2, because the tolerance of the two membrane elements to the pollution of organic matters in the stock solution is very high, the tolerance to high salt concentration also achieves the effect, and the removal effect to COD is over 98%, the difference lies in that the removal efficiency of YLQ-1 to the stock solution with COD content is higher, but the treatment flux is lower, the removal efficiency of YLQ-2 to the stock solution with COD content is slightly lower, but the treatment flux is higher, the combined use effect of the two membrane elements is better, the first-stage chromium removal in the step 2 adopts an ion exchange method to remove chromium ions, and the two special COD removal systems adopt the two special organic membrane elements which are acid-alkali-resistant, can effectively remove COD under the condition of about 20 percent of peptone, the highest effect of two-stage COD removal can reach nearly 1000 times, and the COD content in the effluent is effectively reduced to below 10 PPM. The 5000 dalton filtering precision plays a key role in removing COD in the stock solution, the stock solution with the peptone content of more than 20 percent can be used for a long time, the strong fouling and blocking property of organic matters is not required to be considered, and the cleaning and recovery properties are very good due to the characteristics of a strong acid-base resistant membrane after fouling and blocking;

3) and (3) concentrating the dialysate without chromium ions, concentrating and dehydrating the dialysate subjected to chromium removal treatment, and continuously dialyzing the produced pure water for peptone.

4) Adding concentrated organic solution into peptone concentrated solution intercepted by a high-first-stage and second-stage concentration and dehydration treatment system, concentrating and dehydrating the peptone concentrated solution by using a high-pressure concentration system, and evaporating to obtain peptone solid in multiple effects, wherein in the step 3, the high-COD first-stage and second-stage concentration and dehydration treatment is formed by combining two membrane elements of YLQ-3 and YLQ-4, because the two membrane elements have very high tolerance to pollution of organic matters in the stock solution, the tolerance to high salt concentration also achieves the effect, the COD concentration effect reaches more than 98%, and the difference between the two membrane elements is that the efficiency of the YLQ-4 for intercepting the stock solution with the COD content is higher, but the treatment flux is lower, and the high-power concentration is applied to high-pressure concentration under the condition of more than 60 kilograms. YLQ-3 has slightly low retention efficiency on the stock solution with COD content, but has higher treatment flux, and is applied to high-power concentration under the condition that the medium pressure is more than 30 kilograms and less than 40 kilograms. Therefore, the effect of combining the two is better. The two acid and alkali resistant organic special membrane elements adopted by the high COD concentration system can effectively concentrate COD under high pressure in the environment of about 20 percent of peptone or quickly concentrate and dewater under medium pressure in the environment of 50 ten thousand COD. Through experiments, the highest effect of two-stage concentrated COD can reach the concentration which is close to 20% of the original prepared peptone solution, the COD content in the effluent is effectively reduced to a lower level, and the two-stage concentrated COD can be continuously used for the dissolution and dialysis of the peptone. The filtering precision of 50 dalton grade plays a key role in concentrating COD in the stock solution, and the stock solution with the peptone content of more than 20 percent can be used for a long time without considering the strong fouling and blocking property of organic matters, and the cleaning and recovery properties are very good due to the characteristics of strong acid and alkali resistant membranes after fouling and blocking.

The solid peptone is obtained by carrying out corresponding treatment on the dissolution of the solid peptone, the high turbidity of the solution, high organic substances and the like, carrying out primary chromium removal treatment on high COD (chemical oxygen demand) of the peptone dialysate, and carrying out concentration dehydration and multi-effect evaporation on the peptone concentrated solution.

The invention has the beneficial effects that: through the processes of dissolving, separating, removing, concentrating and evaporating, chromium ions in the solid peptone can be removed in a large amount, the required removal rate is achieved through a multistage chromium-removing ion exchange system, the removal effect required by a chromium-removing process is achieved, the system can achieve a good cleaning and recovering effect on the pollution and blockage of organic protein, and a good effect is achieved on reducing the turbidity of the stock solution. The high organic matter ultrafiltration system adopts an acid and alkali resistant inorganic zirconium oxide special membrane element, can effectively reduce turbidity in the environment of about 20% of organic matter solution, has a key effect on the reduction of turbidity in the solution due to the 50-nanometer filtering precision, can be used for a long time in the solution with the organic matter content of more than 20%, can be repeatedly cleaned by high-concentration sulfuric acid and alkali solution, does not need to consider the strong oxidizing property and the corrosivity of sulfuric acid and liquid alkali, can be restored by a burning method due to the characteristics of an inorganic membrane after pollution blockage, and has very good restoration property.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.