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Industry Issues

Characteristics of Brewery Wastewater

Diversity:

High organic content: brewery wastewater usually contains a lot of organic matter, including residual malt, yeast, alcohol, sugar and so on. These organic compounds are derived from the raw materials and fermentation processes used in beer production.

High biological oxidation requirement (BOD)

Brewery wastewater has a high biological oxidation requirement (BOD) due to the rich organic matter in the wastewater. This means that wastewater requires more oxygen to degrade organic matter, affecting the ecological balance of the water body.

High turbidity:

There may be suspended matter and residual malt particles in the wastewater, resulting in high turbidity of the wastewater. This requires appropriate treatment methods to remove suspended solids.

pH Fluctuations:

Raw materials used in beer production and the process of adjusting pH can cause pH fluctuations in wastewater. This requires the pH of the wastewater to be adjusted and controlled during treatment.

Rich in nutrients:

Wastewater may contain a lot of nutrients such as nitrogen and phosphorus, which may have an impact on the water ecosystem. Proper treatment needs to consider the removal or adjustment of these nutrients.

Temperature change:

Hot wastewater may be produced in beer production, resulting in a higher temperature of wastewater. This requires taking into account the effect of temperature during the treatment process.

Residual cleaning agents:

Cleaning agents used in the cleaning and disinfection process may remain in the wastewater and require corresponding treatment to remove or neutralize.

Possible trace metal ions:

The raw materials, equipment and treatment agents used can lead to the presence of trace metal ions in the wastewater, which needs to be monitored and controlled during treatment.

Based on the characteristics of Brewery wastewater

MBBR Must Have the Following Properties

1

Efficient degradation of organic matter

MBBR system needs to have efficient biodegradation ability to effectively degrade organic matter in brewery wastewater, including residual malt, yeast and other organic components.

2

Adaptation to high biological oxidation requirements (BOD)

Brewery wastewater has a high BOD, and MBBR should be able to handle these high concentrations of organic matter, ensuring that the high biological oxidation requirements are achieved within the restricted space.

3

Tolerance of pH fluctuations

The winemaking process can cause pH fluctuations in the wastewater, and the MBBR system needs to be able to tolerate these fluctuations, or to effectively regulate pH in the system.

4

Good suspended matter treatment capacity

Wastewater may contain suspended matter, wine residue and other particles, MBBR should have a good suspended matter treatment capacity to ensure that the particles in the wastewater are effectively removed.

5

Stability and reliability

The MBBR system needs to maintain a high degree of stability and reliability under different operating conditions to ensure that it is not affected by external factors in long-term operation and reduce maintenance costs.

6

High degradation efficiency

MBBR should have high degradation efficiency, so that the concentration of organic matter can be reduced more in a limited space, and the effect of wastewater treatment can be improved.

7

Impact load resistance

The distillery wastewater may have a peak discharge, and the MBBR system needs to have a strong impact load resistance to ensure that the efficient treatment effect can be maintained under the fluctuating wastewater flow.

8

Adapt to high temperature wastewater

High temperature wastewater may be generated during the brewing process, and the MBBR system should be adapted to high temperature environment and be able to operate stably under high temperature conditions.

Features

MBBR and Disc Diffuser Must have Performance

In the Brewery process, MBBR and aeration disks are usually key components of the biological treatment system.

MBBR (Moving Bed Biofilm Reactor)

High degradation efficiency:MBBR should have an efficient biodegradation ability to effectively degrade organic matter in brewery wastewater, including residual malt, yeast and other organic components.
Adaptation to high biological oxidation requirements (BOD) :Brewery wastewater has a high BOD, and MBBR systems need to treat these high concentrations of organic matter to ensure that the high biological oxidation requirements are achieved within the restricted space.
Suspended matter treatment capacity:Wastewater may contain suspended matter, wine residue and other particles, MBBR should have a good suspended matter treatment capacity to ensure that the particles in the wastewater are effectively removed.
Good adhesion of the filler:MBBR uses the filler as the carrier for attaching the biofilm, and the filler should have good adhesion to provide enough biological adhesion surface and increase the degradation efficiency.
Impact load resistance:The brewery wastewater may have peak discharge, and the MBBR system needs to have a strong impact load resistance to ensure that the efficient treatment effect can be maintained under the fluctuating wastewater flow.

Disc diffusers

High oxygen transfer efficiency:The Disc diffuser needs to provide efficient oxygen transfer efficiency to meet the demand for oxygen in the biodegradation process in the wastewater and improve the biodegradation efficiency of the wastewater.
Uniform gas distribution:The Disc diffuser should be able to achieve an even distribution of gases in the wastewater, avoid dead zones and over-gasification, and ensure that the biofilm throughout the reactor is properly supplied with oxygen.
Corrosion resistance:The Disc diffuser needs to be corrosion resistant, as the brewery wastewater may contain corrosive substances such as acidic ingredients, alcohol, etc.
Adaptability and adjustability: The Disc diffuser needs to have the characteristics of adapting to different working conditions and adjustability to meet the changes in gas demand in different wastewater treatment processes.
Low maintenance costs:Aeration discs should be designed to be easy to maintain and reduce maintenance costs, including easy cleaning, replacement and maintenance.
Long life:The material and design of the Disc diffuser should have a long service life to reduce the frequency of replacement and maintenance costs.

Brewery wastewater treatment

Precautions, Water Process and Parameter Table

Precautions for Brewery wastewater treatment

Wastewater characteristics analysis:Before selecting the treatment process, a detailed wastewater characteristics analysis must be carried out, including the concentration of organic matter, suspended matter, nitrogen, phosphorus and other components, in order to select the appropriate treatment method.
Process selection:According to the characteristics of wastewater, choose the appropriate treatment process, common including MBBR (Moving Bed Biofilm Reactor), aeration tank, activated sludge method, etc. Usually, a combination of biological treatment and physicochemical treatment can achieve good results.
Pre-treatment:Consider whether pre-treatment units, such as grilles, sand sinks, etc., are needed to remove large particles and solid particles and reduce the burden on subsequent treatment units.
pH adjustment:The winemaking process may affect the pH of the wastewater, and it is necessary to consider adjusting the pH value of the wastewater to ensure appropriate treatment conditions.
Temperature control:The wastewater temperature may be high, and the impact of temperature on biodegradation needs to be considered to ensure the stable operation of the treatment system in a high temperature environment.
Shock resistance:Take into account possible fluctuations in wastewater discharge and ensure that the treatment system has some shock resistance to cope with peak discharge.

Features of Brewery wastewater treatment process

High Organic Load:Brewery wastewater typically has a high concentration of organic materials like sugars, yeast, and ethanol, necessitating robust biological treatment processes.
pH Adjustment:The pH of brewery wastewater can vary widely; thus, pH adjustment is often an initial treatment step to optimize conditions for subsequent biological treatment processes.
Aerobic Treatment:This involves using microorganisms in the presence of oxygen to break down organic pollutants. Common systems include activated sludge processes, sequencing batch reactors (SBR), and aerobic biofilters.
Anaerobic Digestion:This process treats wastewater in the absence of oxygen, breaking down organic matter to produce biogas (methane and carbon dioxide), which can be used as a renewable energy source.
Physical Filtration:To remove solids, fine screens, and sedimentation tanks are employed. Advanced options might include membrane bioreactors (MBRs) which combine biological treatment and membrane filtration.
Chemical Treatment:Chemicals may be added to precipitate dissolved pollutants or to adjust pH. Coagulants and flocculants are common chemicals for enhancing solid-liquid separation.
Nutrient Removal:Excessive nutrients like nitrogen and phosphorus can lead to eutrophication in natural water bodies. Processes such as nitrification-denitrification and phosphorus precipitation are used for their removal.
Temperature Considerations:The temperature of wastewater can affect treatment processes, especially biological activities. Temperature control or adjustments might be necessary for optimal microbial activity.
Fat, Oil, and Grease (FOG) Management:FOG can cause issues in treatment systems and must be removed early in the process, often through physical separation techniques.
Tertiary Treatment:After primary and secondary treatments, tertiary treatment can be applied for further reduction of specific pollutants, such as residual organics, pathogens, or nutrients, often using advanced filtration, disinfection (e.g., UV light, chlorination), or additional biological treatment steps.

Brewery wastewater treatment process

MBBR process:The use of suspended biological carriers in the reactor growth, degradation of organic matter. Suitable for the treatment of high concentration organic matter.
Aeration tank process:Aeration equipment is used to inject gas into water to promote the degradation of organic matter in wastewater through biological oxidation. Suitable for organic matter that needs to be oxidized.
Activated sludge process:Using microorganisms in activated sludge to biodegrade organic matter in wastewater. Suitable for low concentration of organic matter.
Deep filtration:The use of filtration equipment to remove particles and suspended solids from wastewater.

Brewery wastewater treatment

Typical Parameter

The following is a parameter table of a typical Brewery wastewater treatment process. The specific values can be adjusted according to the actual situation:

Satge	Processing unit	Typical parameters	Unit
Solid-liquid separation	Sedimentation tank	TSS	50 - 500 mg/L
Biological treatment	MBBR	COD	30 - 200 mg/L
		NH3-N	2 - 10 mg/L
		NO2-N	< 1 mg/L
		NO3-N	< 10 mg/L
		TN	5 - 30 mg/L
Aeration system	Aeration tank	DO	3 - 8 mg/L
Physical treatment	Filter	TSS	10 - 50 mg/L
Ammonia nitrogen removal	Ammonia nitrogen removal unit	NH3-N	< 1 mg/L
Sterilize	Sterilization equipment	Sterilant concentration	0.5 - 5 mg/L
Water quality monitoring	Monitoring equipment	PH	6.5 - 8.5
		Conductivity	500 - 2000 μS/cm
		Temperature	20 - 30 ℃

For Brewery wastewater treatment

A Unique MBBR Model is Recommended

Based on the characteristics of sewage treatment and the experience of previous cooperative customers, the recommendation is our MBBR64 or MBBR7

MBBR19

Size: Φ25*12mm

Hole Numbers: 19

Material: 100% White Virgin HDPE

Densilty: 0.96-0.98g/cm3

Surface Area: >650m2/m3

Dosing Ratio: 15-65%

Membrane-Forming Time: 3-15days

Nitrification Efficiency: 400-1200gNH N/M3d

BOD, Efficiency: 2000-10000g BOD,/M3d

COD5 Efficiency: 2000-15000 gCOD/Md

Applicable Temperature: 5-60C

Life-Span: >20year

MBBR37

Size: Φ25*12mm

Hole Numbers: 37

Material: 100% White Virgin HDPE

Densilty: 0.96-0.98g/cm3

Surface Area: >800m2/m3

Dosing Ratio: 85%

Membrane-Forming Time: 15-65%

Nitrification Efficiency: 3-15days

BOD, Efficiency: 400-1200gNH4 N/M3.d

COD5 Efficiency: 2000-10000g BOD/M3d

Applicable Temperature: 2000-15000 gCOD5/M3d

Life-Span: 5-60C

Brewery wastewater treatment

AquaSust Customer Case

Case 1: Application of MBBR Media in Brewery Wastewater Treatment

Aquasust's medium-sized brewery client in Europe uses MBBR technology to treat approximately 2,000 m3 of organic wastewater per day. the design of MBBR system includes four stages, each filled with Aquasust's MBBR Media, which has a high surface area (500 m2 per cubic meter of filler) to increase microbial growth space. to increase space for microbial growth. After one year of operation, the data showed that the MBBR system reduced the BOD in the effluent from the original 600 mg/L to less than 30 mg/L, and the COD from the original 1,200 mg/L to less than 100 mg/L. Such treatment effect not only meets the local environmental protection requirements, but also has high stability and stable treatment effect.

Case 2: Application of Aeration Diffusers in Brewery Wastewater Treatment

In a large beer production plant in Asia, the average daily volume of effluent treated with aeration diffusers is 5,000 cubic meters. By installing the highly efficient Aquasust aeration diffusers, the plant's oxygen transfer efficiency was increased by 40%, which greatly improved microbial activity and effluent treatment efficiency.Specific data shows that the installation of the new aeration system has reduced the electrical energy consumption from 0.75 kWh to 0.45 kWh per cubic meter, saving approximately US$150,000 in annual electricity costs. In addition, ammonia nitrogen in the treated effluent was reduced from 25 mg/L to less than 5 mg/L, meeting more stringent environmental standards.This system improvement also effectively reduced sludge production due to inadequate aeration, reducing the cost of sludge treatment and disposal and further optimizing the overall wastewater treatment process.

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