B-Poly PHA production

The B-Poly system adds to the B-Sludge plant the conversion of soluble organic carbon to volatile fatty acids (VFA) through anaerobic acidogenic digestion and, subsequently, the production of a PHA-rich biomass through the two coupled processes RANOX® and RAE®.

B-Poly, respectively in the B-Poly LD and B-Poly HD versions, is designed to treat diluted, concentrated or dewatered incoming organic sludge in an operating range of Total Suspended Solids from 1% to 30% or more, equalizing the concentration by mechanical pre-treatment. The pretreated sludge is sent to the hydrothermal carbonization (HTC) process under the optimum fluid dynamic conditions and then to solid-liquid separation by filter press, operating without the use of polyelectrolytes.

The main advantages of B-Poly
  • Reduction in the volume of dewatered sludge to be handled to other disposal facilities (e.g., landfill) or to other forms of recovery (e.g., waste-to-energy, composting, agricultural spreading) by up to 70% by weight
  • Production of sanitized water with very low COD content (< 1 g/l), which can be recirculated at the head of the process or sent to the water line without aggravation
  • Production of raw bioplastic (PHA), intended for the B2B market

B-Poly LD

B-Poly Low Density treats diluted sludge (indicatively [TSS] < 10%), and is characterized by the presence of a pre-concentration station that allows to reduce the volumes to be handled in the hot phase (HTC) and in the solid-liquid separation phase with filter press, for overall energy efficiency.

The biological processes involve an anaerobic acidogenic digestion, aimed at the production of volatile fatty acids (VFA), followed by the two integrated aerobic phases RANOX® and RAE®, deputed to mixed microbial culture (MMC) selection and PHA accumulation. The final green solvent extraction module allows obtaining the dried PHA.

B-Poly LD is the solution designed for sewage treatment plants with large flows of sludge for disposal, with the aim of increasing the degree of circularity of the process.

B-Poly HD

B-Poly High Density treats concentrated sludge (indicatively [TSS] = 10-18%), and is characterized by mechanical homogenization pretreatment.

In its strong version, dedicated to dewatered sludge (indicatively [TSS] > 20%), it includes the turbodissolver, capable of liquefying the dewatered sludge again by appropriately adjusting its density by dosing water recirculated from the plant itself.

Controlling the density of the incoming sludge makes it possible to optimize the volumes of the carbonization (HTC) and solid-liquid separation stages with filter press, for overall energy and plant efficiency.

The biological processes involve an anaerobic acidogenic digestion, aimed at the production of volatile fatty acids (VFA), followed by the two integrated aerobic phases RANOX® and RAE®, deputed to mixed microbial culture (MMC) selection and PHA accumulation. The final green solvent extraction module allows obtaining the dried PHA.

B-Poly HD is the ideal solution for those who confer into a single treatment hub, concentrated or dewatered sludge that comes from smaller plants.

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