1. The selection and operation of the pretreatment processes
2. The sizing of the MBR tank

The mechanical design of the membrane system

The selection and operation of the MBR System pretreatment processes

The complete pretreatment process design includes Pre-treatment and Biological design.

The sizing of the MBR tank

     Separate tank for the MBR Modules will have good and convenience maintenance. 

     The mechanical design of the membrane system    

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The nitration reaction in the presence of nitrate/nitrite is a common reaction during the degradation of pollutants in natural water as it contains nitrate and nitrite ions, Chemical compounds containing nitro group (nitro-products) are a one of toxic by-products, that can be formed during wastewater treatment processes. In case of presence of nitrite or nitrate ions, the formation of nitro-products during advanced oxidation processes (AOPs) is very common. It is caused by the reactive nitrogen species (RNs) such as nitrate radical (NO3•), nitrite radical (NO2•), nitrogen oxide radical (NO•) and peroxynirite (ONOO–). In fact, the oxidative degradation of N-containing pollutants releases nitrate, nitrite and ammonium ions.

Nitration reactions may exist during all the biological degradation process Anaerobic or aerobic digestion.

NH₄⁺   + 2O₂ = NO₃^– +H₂O +2H⁺ -F(F=351K)

The key factors effect the performance of Denitration reaction as below:

• Denitration reaction in anaerobic digestion, add the reflux pump, 2 times of MBR Premeate flow rate from MBR Tank to anaerobic digestion, the dissolved oxygen in anaerobic digestion better around 0—0.5mg/L with Water temperature above 20 degree.

NO₃^– +10e^–+12H⁺ = N² +6H₂O

• During the Denitration reaction, the C/N≥4, Denitration reaction NO₃^– will change to the N₂;  if C/N≤4, Denitration reaction NO₃^– will change to the N₂O
• The wastewater PH≥5, Denitration reaction NO₃^– will change to the N2, the PH better around 7.5—8.5

Of course, the first step of good performance Nitration reactios and Denitration reaction, the bacteria activated sludge should be breed very good.

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Calculating the membrane area required for any project wastewater treatment plant, that membrane bioreactor (MBR) plant involves several factors and may require engineering calculations. Here’s a simplified approach:

1. Determine Flux Rate: First, you need to determine the desired flux rate for your MBR system. This is typically measured in liters per square meter per hour (LMH). It depends on the type of wastewater industry or domestic sewage, specific membrane type, fouling characteristics, and treatment goals. Common flux rates for MBRs range from 10-25 LMH, and sewage we suggest flux rates design at 15LMH.
2. Calculate Daily Flow Rate: Given that your STP processes 50,000 liters per day (50KLD), convert this to cubic meters per day (m³/day) by multiplying 1,000 (1 m³ = 1,000 liters).
3. Determine Required Membrane Area: Use the formula:

Membrane Area (m²) = Daily Flow Rate (m³/day) / Flux Rate (LMH)/20

Note: Consider flux in 15 LMH and 24 hours of operation per day, but MBR interval working, normal setting 7-minutes working 1-minute relax, then consider as 20 hours working per day.

For example,

Membrane Area (m²) = 50,000 / 15/20 = 166 m²≈180 m² (because our standard MBR Element Membrane area with 10 m² or 20 m² per unit)

So, for a 50kld MBR plant with a flux rate of 15 LMH, you would need approximately 180 square meters of membrane area.

Keep in mind that this is a simplified calculation, and the actual membrane area required can vary based on factors such as the specific MBR technology, wastewater characteristics, operating conditions, and system design. It’s essential to consult with a qualified engineer or MBR system supplier-Hinada for a more accurate design calculation based on your project’s requirements, Hinada will provide you all the technical data for your STP, included the MBR Tank size, air blower, suction pump and valves.

To discuss your MBR requirements or to request a customized quote, please feel free to contact us at: jeff@hinada.com,

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The PVDF membrane with a pore size of 0.4 μm, 0.1μm, 0.03-0.06μm widely in the market,

can be used for most immunoblots and is recommended for proteins or bacteria remove or turbidity low down with a molecular weight less than 20 kDa. For drinking water, it’s better choose the pore size less than 0.1μm, and wastewater filtration pore size above 0.1μm is acceptable.

We offer two types of PVDF (Polyvinylidene Difluoride) membranes, optimized for a specific wastewater and drinking water application, our PVDF membrane pore size is: between 0.03—0.06μm.

Bacteria, viruses, and particulates including colloids has bigger diameter, like cryptosporidium and Giardia and colloform diameter between 0.5–5μm, which cannot pass through the UF pores.

ultrafiltration (UF) can remove particulate and colloidal matters bigger than the pore size of the membrane and usually produce a filtrate free of turbidity and bacteria. These have been widely used to produce drinking water from river, lake,and underground water

As long as the UF pores size less than 0.1μm, then most of the bateria, virus and particles can be removed, SDI of output clean water: ≤ 2.5

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Membrane bioreactor or MBR technology is a wastewater remedy procedure that combines an organic remedy manner with a membrane filtration gadget. The natural remedy technique, commonly an activated sludge, removes organic count and nutrients from the wastewater. The membrane filtration machine removes suspended solids, micro organism, and viruses from the handled wastewater.
Hinada, we are the manufacturer of MBR Membrane, we can offer according to your project requirement, Hinada can offer professional solution designation, sophisticated installation, good training and efficient after-sales service according customer’s requirements
MBR Project Site Video

MBR technology has several benefits over conventional wastewater remedy structures, which include:
High-great effluent: The handled wastewater from an MBR machine is of a completely excessive excellent, with shallow tiers of suspended solids, microorganisms, and viruses. This makes it suitable for a vast range of reuse packages, which include irrigation, business method water, and drinking water.

Compact footprint: MBR systems are usually plenty extra compact than conventional wastewater treatment systems because they do now not require a separate secondary clarifier. This makes them ideal for use in city regions with restrained areas.

Reduced sludge production: MBR systems produce appreciably much less than conventional wastewater remedy structures. This reduces the price of sludge disposal and enables to protect the surroundings.

Here are some of the particular blessings of MBR generation for water purification:

High elimination performance: MBRs can eliminate a wide range of contaminants from water, such as microorganisms, viruses, protozoa, suspended solids, vitamins, and organic rely on.

Low electricity intake: MBRs may be operated at low power charges, making them a cost-powerful alternative for water purification.

Simple operation and maintenance: MBRs are relatively clean to perform and keep, making them a terrific choice for small and medium-sized water treatment vegetation.

Flexibility: MBRs may treat various water sources, including surface water, groundwater, and wastewater.

MBR technology is a promising new technology for water purification. It offers many advantages over conventional methods, such as highly effective water removal, low energy consumption, ease of operation and maintenance, and flexibility. As technology advances, MBR will likely play an increasingly important role in water treatment worldwide.
More details information about the MBR Membrane Bioreactor, please contact with Hinada.

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