CONSULTING ON WASTEWATER TREATMENT SOLUTIONS FOR CONFECTIONERY PROCESSING

1. Overview of the Confectionery Industry

• In recent years, alongside the development of key economic sectors, the confectionery industry has shown a high and stable growth rate. Consumption volumes fluctuate significantly with seasonal events such as Lunar New Year, Mid-Autumn Festival, etc. The main ingredients in confectionery production typically include wheat flour, sugar, butter, milk, and some other ingredients.
• The confectionery industry in Vietnam continuously improves and develops to meet both domestic and international demand. Alongside this growth, the issue of post-production pollution is of significant concern.

 

2. Characteristics of Confectionery Production Wastewater

a) Origin:

- Production Wastewater: This arises from the processes of raw material preparation and finished product processing, cleaning of machinery and equipment, and cleaning of production facilities

- Domestic Wastewater: This comes from the daily activities of workers and staff, kitchen areas in the facility, etc.

b) Characteristics:

- Wastewater from the confectionery industry is highly polluted, mainly containing organic matter, suspended solids, nitrogen (N), phosphorus (P), pathogenic microorganisms, and particularly floating oil and grease. If not treated, this can lead to anaerobic decomposition, resulting in foul odors.

- Systems that have been in operation for too long without regular nutrient supplementation can lead to aging and ineffective microorganisms in the treatment tanks.

- Increased wastewater flow due to higher production efficiency can overload the system, affecting the quality of treated water and failing to meet standards.

 

3. Treatment Technology

Choosing a wastewater treatment system depends on several criteria:

• Flow rate, composition, and characteristics of each type of wastewater.
• Suitability of the site for underground or above-ground construction.
• Budget and operating costs
• Equipment and materials used in the treatment system.
• System's ability to handle increased wastewater flow as production expands.

The AAO Technology is suitable for this purpose:

Anaerobic Tank (UASB) By introducing anaerobic microorganisms, it reduces the concentrations of BOD and COD in the wastewater. After leaving the UASB tank, the wastewater moves to the Anoxic Tank.

Anoxic Tank: This tank reduces nitrate to nitrogen gas. The anoxic microorganisms absorb nutrients and convert nitrate to nitrogen gas. The process is more efficient with the combined flow of wastewater and recirculation. The conversion to N2 occurs as follows:

- Step 1: Convert nitrate to nitrite

6  + 2CH3OH → 6  + 2CO2 + 4H2O

- Step 2: Convert nitrite to N2

6  + 3CH3OH → 3N2 + 3CO2 + 3H2O + 6OH- + 3O2           

Aerobic Tank: This tank continues the processes of BOD and COD removal and converts ammonia to nitrate.

The nitrification process here converts ammonia (NH3, NH4+ ) to nitrite (NO2) and then to nitrate (NO3) through the activities of two types of bacteria Nitrosomonas và Nitrobacter:

* Nitrosomonas bacteria: Convert ammonia to nitrite NO2-

NH4+ + 3/2 O2 → NO2- + H2O + 2H+ + energy

* Nitrobacter bacteria: convert nitrite to nitrate NO3-

NO2- + ½ O2 →  NO3- + energy

The BOD content in the wastewater is treated with the help of aerobic microorganisms. BOD removal efficiency can reach 85 - 90 %.

Organic matter + Aerobic microorganisms + O2 → CO2 + H2O + New biomass.

 

4. Application of Microorganisms in Confectionery Production wastewater treatment

BOD, COD, TSS, CELLULOSE TREATMENT

BIOCLEAN ACF SC MARINE

• Highlights:

- Reduces BOD, COD, TSS in treated wastewater.

- Enhances the performance of systems treating high levels of fiber, sludge, and cellulose.

- Treats wastewater turbidity and improves color, especially in high starch content wastewater.

Applications: Confectionery production, starch, paper, fruits and vegetables, seafood wastewater, fish sauce production, slaughterhouse wastewater, livestock pens, canned fruit production, leather processing, etc.

BIOCLEAN ACF AD ACTIVATOR

Highlights:

- Enhances anaerobic digestion efficiency.

- Improves BOD/COD removal.

- Enhances biogas tanks, septic tanks, anaerobic systems.

- Reduces H2S and sludge formation

- Optimizes the community of effective anaerobic microorganisms.

- Degrades a wide range of complex organic compounds, including facultative anaerobes.

Applications: suitable for anaerobic technology, biogas tanks, septic tanks, composting, etc.

 

BIOCLEAN ACF-NITRO ACTIVATOR

• Highlights:

- Contains two specialized microorganisms for nitrification: 

+ Nitrosomonas sp (converts Ammonia to Nitrite)

+ Nitrobacter sp (converts Nitrite to Nitrate).

*** ACF AD, ACF SC MARINE, ACF NA are combined for both anaerobic, anoxic, and aerobic systems, providing the most optimal and effective solution for treating BOD, COD, TSS, high total nitrogen, improving water color, controlling odors, and treating cellulose in wastewater, ensuring compliance with wastewater discharge standards.

 

Where to buy genuine BIOCLEAN products

- Bioclean - Aquaclean is a trusted line of microorganisms used by many treatment facilities.

- Genuine products are imported 100 % from the USA and exclusively distributed by Biotech Vietnam.

Biotech Vietnam specializes in products for treating nitrogen, ammonia, sludge, ordors, organic oil, septic tanks, and more,…..

 

In addition to environmental products, Biotech Vietnam also provides products for aquaculture and agriculture. For more information, visit: https://www.biotechvietnam.org/

 

BIOTECH VIETNAM

11/11A Nguyen Van Mai Street, Ward 4, Tan Binh District, HCMC

Hotline: 0914.811.441