Biobed® ADVANCED EGSB

The Biothane Advanced UASB (Upflow Anaerobic Sludge Blanket) and Biobed® Advanced EGSB ( Expanded Granular Sludge Bed) technologies are extremely compact, high performance anaerobic treatment processes for industrial effluents using granular sludge.

Proven superior performance showed lower operating costs

The Biobed® Advanced system achieves at high reactor loading rates, not only the sludge retention of a UASB system, but also achieves similar COD removal efficiencies.  

In pilot and full scale plants a stable and reliable granular sludge increase was always observed. To date 70 systems are in operation, some for more than 10 years. The largest reactor is 9000 m³ and treats a load of more than 180 ton COD/day at a paper mill in China. This high loaded system shows superior COD removal efficiencies, which results in reduced chemical costs and substantially reduced aerobic post treatment costs. 

The experience from full scale plants has shown that the Biobed® Advanced system requires less investments, less overall operating costs and requires less operator attention compared to other anaerobic systems.
 

Compact settler reduces investment cost

The Biobed® Advanced settler can handle higher liquid and gas upflow velocities, and thus reduces the required settler area in the reactor. The compact design requires less construction material and results in a roughly one meter lower reactor height.  The standard design fits round and square tanks, with heights of up to 20 meter. 

A simple but very effective effluent collection system with submersed pipes completes the design Standardization and using standard stainless steel plates and automatic cutting limits manpower cost for construction and as such the cost per m2 of settler.

Transportation costs are reduced by using outer settler dimensions which fit nicely in standard 40ft sea containers.
 

A world of advantages

• Based on fundamental research
• Small compact settler and small reactor
• Easy effluent pipes
• Flexible reactor height
• Flexible in construction; round steel or square concrete
• Superior removal efficiencies
• Excellent biomass inventory
• Low chemical consumption
• No odour emission
• Reduced aerobic post treatment
• Low foot print
• Low investment and operating cost

Development of the advanced system

It sounds hard to believe a wastewater treatment system which is not only cheaper, but also guarantees a best performance.
 

Combining the best of both

UASB systems are renowned for their high COD breakdown efficiency and the ease of maintaining and producing anaerobic granular sludge. Main driving force for implementing EGSB systems are the substantially reduced invest cost due to the higher volumetric loading rates (2-3 times) and the taller reactors (2-3x), which further minimize the required foot print. 

The challenge in developing the Biobed® Advanced reactor, was combining the excellent performance of the UASB reactor with the cost effectiveness of a high loaded system. This has resulted in a novel reactor design, which showed in practice indeed superior sludge retention characteristics.

The Biobed® Advanced reactor can be built as a completely closed system, which ensures no odor emission.
 

Biobed® Advanced experience

• > 16 years full scale experience
• Applications:
  • Pulp & Paper:
  • Chemicals and PTA:
  • Food: Dairy, Sugar, Potato,
  • Brewery & Distillery
• Largest plant 9000 m³ treating > 180 ton COD/d
• Smallest plant 100 m³ treating 1.0 ton COD/d