GreenFort Membrane bioreactor series MBR

GreenFort series MBR is designed for biological wastewater treatment reducing organic impurities, biogenic substance, suspended solids and colloids to permissible concentration in waterbodies. Effectively removes microplastics from water.

GreenFort series MBR is automated modular wastewater treatment plant based on standard three-zoned biological membranes reactor.

Scope of application

• Treatment of wastewater contaminated with biogenic substances (mainly from wastewater of the household and public services and industry).

Aerobic biological treatment

Aerobic biological treatment is a common wide spread and well accepted technology to treat many different industrial and municipal waste waters. We at Jurby have over 20 years experience in selecting and operating many types of waste water treatment plants (WWTPs) for different industries.

In order to select the best suitable treatment technology to suit your needs, we use our vast experience of not only designing and building waste water treatment plants, but also operating them. We are familiar with all modern treatment technologies and their advantages and disadvantages. A selection of treatment systems we have applied are shown below.

Conventional activated sludge system typically suitable for industrial waste waters with a COD below circa 2000 mg/l and that needs to produce an effluent quality of 120 mg/l, 20 mg/l BOD and 30 mg/l SS.

When this same waste water requires lower final effluent concentrations for COD, BOD, SS and other parameters, Jurby applies membrane bioreactor (MBR) technology with submerged or external membranes. Below is a flow scheme shown with submerged membranes.

Depending on the required effluent quality, the design sludge age will be adjusted to provide a customized, perfectly matching biological system, followed with tertiary treatment like activated carbon filtration, tertiary denitrification, UV treatment etc. if required to provide an economical and sustainable waste water plant. The flow scheme indicates that the MBR aeration tank and membrane system take up less space than a conventional activated sludge system. This makes MBR technology extra advantageous for facilities with limited space or for WWTP’s that require upgrades

Anaerobic treatment

When waste water COD values rise above 2000 mg/l (or BOD values are above 1000 mg/l), anaerobic treatment becomes an option as it is more sustainable and in the long run more economical. Jurby WaterTech is experienced in selecting the most suitable anaerobic treatment system for each waste water application, either for breweries, other food and beverage processing companies, pulp and paper industry and the (petro) chemical industry. Anaerobic treatment produces biogas that can be used on side and reduces the overall sludge production and thus sludge discharge costs significantly. The operation of the anaerobic treatment system is more economical than for aerobic treatment as there is no requirement for aeration energy. The effluent quality from anaerobic systems is normally not sufficient for direct discharge and aerobic biological treatment is usually provided following aerobic treatment to meet the licence limits.

Advantages Anaerobic treatment

• Biogas production
• Low sludge production (circa 10% of aerobic systems) and thus low sludge disposal costs
• No odour release
• Small footprint
• Energy production instead of energy consumption

Anaerobic treatment is ideal for waste waters with easily biodegradable waste components and for existing waste water treatment plants that require increased treatment capacity.

For the petrochemical industry, the waste water requires substantial pretreatment before the waste water can be treated biologically as oil particles disrupt the biological treatment and sludge clarification, both in conventional clarifiers and in membrane systems. A typical block flow diagram is shown below indicating two pretreatment steps.

Screening and grit removal is important to take out smaller particulate matter and to protect downstream equipment from rags and other large items . In the first primary oil/water separator that can also serve as a balancing tank oil will be taken of the surface as the first oil/water separation process. In the secondary oil/water separation which is often a mechanical device, the remaining oil particles, either floating or suspended is removed. Often DAF units are used for that. Following the intensive pretreatment, aerobic biological treatment is used to remove the organic components as well as the nutrients present. After either gravity sedimentation or membrane separation further tertiary treatment can be required to comply with discharge licence limits or to produce a water quality that can be re-used on side.