Chempure Technologies Private Limited

Crossflow Membrane Bio Reactor - MBR

The expenses for the disposal of industrial and municipal wastewater are increasing strongly due to more stringent governmental legislation ordering lower discharge limits and higher discharge taxes. Moreover, the intake of ground water is being limited to prevent a dehydration of the soil having a destructive influence on nature's flora and fauna. The call for a closed water cycle is becoming louder and more efficient wastewater treatment techniques have been developed, such as the membrane bio-reactor (MBR).

System description

An Membrane Bio Reactor (MBR) is a compact-built purification system combining the biological degradation step with a membrane separation step. The influent is fed to the aerated bio-reactor where the organic components are oxidisedby the activated sludge. Next, the aqueous activated sludge solution passes through a membrane filtration unit separating the water from the sludge. The latter returns to the bio-reactor, while the permeate is discharged or re-used as particle-free effluent.

The combination of biological treatment with membrane filtrationoffers several significant advantages over a
conventional activated sludge system as presently being used forindustrial wastewater, such as less surplus sludge and particle free-effluent.

A smaller surplus sludge results in a higher average age of the activated sludge leading to more component-specific bacteria and not only to fast-growing bacteria. Therefore, a Membrane Bio Reactor is very suitable to treat more heavily polluted industrial waste streams. The particle-free effluent is suitable for direct reuse or can be upgraded further by means of reverse osmosis for high-grade application as process water.

CHEMPAC sewage treatment plants represents the “State of the Art” technology in the field of waste water treatment. CHEMPAC sewage treatment plants combines the established diffused aeration principle with the reliability of fixed film system. CHEMPAC sewage treatment plants is a single tank package of outstanding performance and efficiency.

CHEMPAC sewage treatment plants is available in a range of standard modular sizes. It has wide ranging application in organic waste treatment. It is ideally suited for resorts, hotels and condominiums.

CHEMPAC sewage treatment plants is simple in  design and highly flexible in operation. The unique arrangement of fixed media results in unbeatable size to population treatment ratio.

Features	Benefits
High organic loading rate	Reduces overall volume resulting in low capital cost
No moving parts	Low maintenance cost and shut down cost
No sludge recycle	Easy operation
High BOD reduction	Better quality of treated water
Compact size	Skid mounted construction, easy for transportation by containers
Stable growth of bacterial film	No need to maintain MLSS and expert supervision not required
Submerged media	Sustains microbial growth even during power shut downs

CHEMPAC

CHEMPAC sewage treatment plants is specially developed for efficient removal of BOD, Oil, Grease and other organic from sewage.   It provides excellent growth environment for bacteria.   The Reactor tank is loaded with cross fluted PVC media and air diffusers are provided at the bottom for releasing air uniformly across the width of the tank. 

The media is custom designed to provide a series of vertical columns placed along the access of the unit.   The alternate columns serve as up flow and down flow in the stationary biological film reactor providing maximum contact time.

BIOLOGICAL GROWTH IN THE CHEMPAC SYSTEMS

Bacteria grow rapidly in the CHEMPAC sewage treatment plants units under properly engineered conditions. They consume organic chemicals for their growth and remove them from the waste water.  The bacteria convert the chemicals into biological cells, which under proper growth conditions, form slimes.  The slimes adhere to available surfaces and accumulate into what we call stationary biological film or fixed film.

In the CHEMPAC sewage treatment plants the rigid PVC matrix provides 42 sq. ft. of surface area per 1 cu.ft. of media for attachment of the stationary biological film.  The high surface area-to-volume ratio of the CHEMPAC units allows for accumulation of substantial concentrations of bacterial in the relatively small reactor units.   Further the accumulated bacteria which provide high rates of removal of organic chemicals, are fixed in the system and do not need to be recycled back to the basin

The Upflow Anaerobic Sludge Blanket Systems also relies on upflow velocities to suspend anaerobic solids. However, upflow velocities are much lower than utilized in the AFB process since no carrier material is provided. Instead the anaerobic active mass tends to form a granular type of sludge which assists with its retention in the anaerobic reactor. Various differences between UA Sludge Blanket Systems reactors were noted on visits to various European facilities. Some reactors are constructed of concrete; others of steel. Some reactors are rectangular; others are cylindrical. Some are moderate height (6 m ); one extended 20 m high. The reactors generally had various proprietary designs for distributing influent and recirculated flows at the bottom as well as three-phase (effluent, solids, gas) separators at the top.

AREA OF SLUDGE BLANKET APPLICATION

The UA Sludge Blanket Systems concept which has been traditionally used for treatment of liquid effluents has been successfully modified for treatment of liquid waste with high concentration of suspended solids like Abattoir waste waters as well as solid waste like Poultry droppings, Kitchen Waste, Vegetable Waste.

LOADING RATES

Type of Wastewater	Maximum loading rate (kg COD / m3-day)	COD Reduction (%)
Sugar beet factory	30-32	75
Potato Processing	40	84
Potato starch production	30	75
Vegetable canning	10-20	60-80
Yeast factory	14	70
Dairy factory	15	80
Slaughter House	10	55
Rendeering plant	6	63
Distillery waste	11-17	45-65
Wood ethanol stillage Currant finishing	16	86
Wastewater	10-12.5	93-95

The Best Available Systems For Wastewater Treatment And Reuse : -

SINCE THE 1980's, Membrane Bioreactors (MBR) have been successfully used to treat municipal, commercial and industrial wastewaters for discharge and reuse applications. Today, with thousands of installations operating worldwide, MBR technology is shaping the way we view wastewater treatment and water conservation in the US and around the world.

Description of MBR technology

An MBR is a combination of the activated sludge process, a wastewater treatment process characterized by a suspended growth of biomass, with a micro- or ultra-filtration membrane system that rejects particles. The membrane system replaces the traditional gravity sedimentation unit (clarifier) in the activated sludge process. The turbidity and suspended solids concentration of the effluent is far lower than in conventional treatment. All biomass is retained and becomes returned activated sludge. Biological growth leaves the system as waste activated sludge. The figure shows an immersed MBR that is market by several vendors with various proprietary features.

Advantages of MBR

1.High effluent quality

• Filtrate – free of suspended solids & fecal coliforms

2.Elimination of secondary clarification tank, small footprint

• Only half of the area of conventional activated sludge process is required, capital cost is reduced

• Solve the problem of poor sedimentation in conventional activated sludge process; especially for winter.

3.Long solid retention time, easy management

• Sludge wasting volume is greatly reduced

4.High biomass concentration and treatment efficiency

• Operate at biomass concentration of 10,000 – 20,000 mg/L, COD removal and denitrification occur simultaneously.

5.Easy to install in the existing aeration tank to become MBR

6.Easy for Operation & Maintenance

7.Greatly reduce the volume of aeration tank

8.Reduce fouling and increase water flux

Parameters	Raw sewage	Treated sewage
BOD	300PPM	<5PPM
COD	800PPM	<10PPM
TSS	350PPM	<2PPM
O&G	50PPM	<10PPM
Turbidity	10 NTU	<0.1 NTU
Fecal coli forms	6   10	Not detectable
Total Phosphorous	10PPM	1PPM
Total nitrogen	60PPM	<3PPM
Total Ammonia	10PPM	Not detectable

We are engaged in offering a range of Water and Wastewater Treatment Equipments that includes :-

 

• Media Filters
• Iron Removal Systems
• De-ionsing plants
• Water softeners
• Dm plant
• Reverse osmosis systems
• UV sterilizer and Ozonators.

 

Advanced technology is used to treat water effectively and make it fit for gardening, cooling water make up and toilet flushing. Our sturdily constructed range is corrosion and abrasion resistant, easy to install and low in maintenance. We provide treatment plants for guest houses, bungalows, info parks, industries, offices, theme parks, hotels and hospitals.