What process is used for MSG fermentation wastewater treatment?

Usually, the bacteria suspended in the wastewater are not removed during the treatment of monosodium glutamate wastewater, and the bacterial protein accounts for 30 -40 of the organic components in the wastewater, and the bacterial protein is still a substance that can be used to make feed, single-cell protein powder and other products with reuse value.

The bacteria in the production of monosodium glutamate are in, and have strong hydrophilicity, the separation of the bacteria is more difficult than other fermentation products, the glutamate fermentation broth contains about 4 wet bacteria, and the protein content of more than 70 can be produced after extraction and drying, according to the annual production) 520,000 tons of monosodium glutamate, 100,000 tons of bacterial protein can be produced, which can greatly reduce the cost of monosodium glutamate wastewater treatment. Some domestic enterprises use or are trying high-speed centrifuges or flocculation sedimentation to remove bacteria.

Except for the ** part, the main process of biological treatment is generally anaerobic + aerobic, and this kind of wastewater has not been specifically contacted, for reference.

MSG wastewater can be divided into two categories according to the pollutant concentration: one is the off-cross tail liquid with high pollutant concentration and complex composition. The second type is medium and low concentration organic wastewater composed of carbon column treatment water, rice washing water, equipment cleaning water and domestic wastewater, which has a large amount of wastewater.

The contents of organic matter, NH3-N and SO4 in the buried waste water were high, the pH value was low, and a certain amount of Cl was contained. It has direct and indirect biological toxicity to anaerobic and aerobic organisms, and its treatment has been studied at home and abroad for many years. This kind of question can be asked to a platform such as Environmental Protection Pass, mainly about water treatment, I hope it will be helpful to you.

Through the field investigation and investigation of the typical monosodium glutamate wastewater treatment project in China, the implemented projects are basically divided into three processes:

1.Anaerobic + aerobic treatment process;

2.Completely aerobic process;

3.Different forms of hydrolysis acidification + aerobic process.

Due to the high SO4 and NH3-N in the wastewater, the different degrees of inhibition of anaerobic and aerobic microorganisms lead to the normal operation of the treatment system or the almost impossible operation of the anaerobic reaction system. In order to avoid the contradiction between the two, the follow-up transformation of some enterprises and the new engineering design after 2000 will focus on the early physicochemical treatment, respectively

1. Concentrated evaporation method;

2. Ca(OH)2 desulfurization method;

3. Air oxidation blowing method;

Fourth, the process water dilution method.

High-speed centrifugation. Through the high-speed operation of the centrifuge, the precipitation and removal of impurities in the chemical solution are accelerated.

Flocculation is a widely used water treatment technology, which plays a very important role in slag water supply and sewage treatment.

Due to its characteristics of "five highs and one low", monosodium glutamate is difficult to treat and the cost is extremely high, making it one of the sources of industrial pollution that is difficult to control, but it is also one of the resource banks worth developing.

There are three main ways to comprehensively treat monosodium glutamate production wastewater: first, the use of useful ingredients, such as ammonia nitrogen components with more content in wastewater, can rely on physical methods to fully concentrate and transform the utilization to make feed protein, create economic benefits and reduce wastewater treatment costs, so the concentration and conversion of ammonia nitrogen is one of the ways to consider in the production wastewater treatment project of monosodium glutamate plants; The second is the terminal treatment method, due to the low concentration of wastewater and the low ammonia nitrogen content of some wastewater after pretreatment, the organic matter in the wastewater is directly converted into other components by chemical coagulation method, and the concentration of COD, BOD, ammonia nitrogen, sulfate, etc. is reduced, and then most of the organic matter in the wastewater is completely oxidized and decomposed by biological method and converted into harmless substances; The third is cleaner production, starting from the source of monosodium glutamate production wastewater, improving the production process, carrying out cleaner production, reducing the discharge of monosodium glutamate wastewater, and finally achieving zero discharge.

To sum up, the general monosodium glutamate wastewater treatment can adopt the following treatment process: first use the physical method for pretreatment, and at the same time concentrate the high-concentration wastewater for conversion and utilization, and then mix the treated wastewater with the medium and low concentration production wastewater, and then enter the chemical coagulation treatment stage together to reduce the organic concentration, improve the chemical degradability, and finally enter the biochemical degradation stage, and use the biochemical reaction for thorough oxidation treatment, so as to reduce the secondary pollution, and at the same time combine with clean production to reduce the discharge of wastewater.

In short, each monosodium glutamate production enterprise should start from its own actual situation and choose a treatment plan that is more suitable for its own characteristics, rather than blindly copying the program process of other enterprises to maximize the comprehensive treatment of monosodium glutamate wastewater. While researching and developing monosodium glutamate wastewater treatment technology, the scientific research department should also combine the successful experience of foreign countries to study the truly economical, effective and environmentally friendly treatment technology in combination with China's national conditions, so as to make due contributions to China's economic construction.

No matter what kind of production wastewater reuse, it is of great significance in wastewater treatment. On the one hand, wastewater reuse can reduce pollution discharge, which is of positive significance to environmental protection and is a necessary measure for sustainable development. On the other hand, protecting the environment is beneficial to our living environment and is a necessary measure for the benefit of future generations.

The reuse of monosodium glutamate production wastewater can be treated with flocculants and some purification equipment. Imported BASF flocculants can be used.

Eisen flocculant.

Mitsui polyacrylamide.

Or the flocculant produced by Suzhou Haonuo to deal with it.

After the preliminary treatment of flocculant, the sewage can basically meet the reuse standard.

The reuse of wastewater or sewage into production systems or household miscellaneous uses after secondary treatment and advanced treatment is known as sewage reuse. Wastewater reuse ranges from industrial reuse to recharge water and domestic water for water bodies.

Sewage reuse can effectively save and utilize limited precious freshwater resources, reduce the discharge of sewage or wastewater, reduce the pollution of the water environment, and alleviate the overload of urban drainage pipelines, which has obvious social, environmental and economic benefits.