Biogas plants

Pre-treatment solutions for animal by-products used
in biogas production

Biogas plants can be important receiving facilities for animal by-products and animal-origin process streams. However, these materials often require controlled pre-treatment before they can enter the biogas process, especially where local or European regulatory requirements apply. WALDT develops processing concepts that help biogas plants and their suppliers prepare animal by-product streams for approved energy recovery

Industrial pre-treatment equipment for biogas plants

Built around sterilization and feedstock requirements

Animal by-products intended for biogas production require mandatory sterilization or thermal pre-treatment before they can be accepted as feedstock. The right concept depends on the ABP category (Cat 1, 2, or 3), volume, consistency, handling conditions, and the requirements of the receiving plant. A reliable solution starts with defining the treatment route, utilities, storage, transfer logic, odour control, and regulatory constraints before implementation. The technologies must respect local legislative requirements, such as Regulation (EC) No 1069/2009 of the European Parliament.

From treated by-products to valuable energy input

With the right process design, animal by-products, fats, and liquid process streams can become high-quality feedstock for biogas or biodiesel applications. This may include sterilized material from farms or slaughterhouses, concentrated liquid streams, or fat-rich outputs from rendering processes. We support these projects with integrated shredding, sterilization, thermal processing, fat handling, and effluent concentration concepts, depending on the material and target use.

Process equipment for animal by-product pre-treatment in biogas plants

How WALDT can help

WALDT is a specialized engineering and technology partner for animal by-product processing projects.
01

Assessment

The first step is to understand the material stream, regulatory context, and biogas feedstock requirements.

  • Type and category of animal by-products
  • Daily volume, variability, and handling conditions
  • Required sterilization or thermal pre-treatment
  • Feedstock expectations of the biogas plant
  • Site layout, utilities, storage, and logistics
  • Local regulatory and environmental requirements
02

Technology Study

A Technology Study provides the technical basis for defining the right pre-treatment concept.

  • Raw material and feedstock assessment
  • Treatment route evaluation
  • Mass balance calculations
  • Sterilization and thermal processing requirements
  • Site and layout constraints
  • Utility requirements
  • Preliminary system configuration
  • Yield, energy consumption, operational costs, and total cost of ownership (TCO) assumptions
03

System architecture and layout planning

The biogas pre-treatment concept is developed as one connected system.

  • Material intake and preparation
  • Integrated solution design
  • Thermal pre-treatment process
  • Storage and transfer to biogas use
  • Fat and liquid stream handling
  • Odour control and environmental systems
  • Utilities, automation, and process control
04

Implementation and support

WALDT supports the project beyond design and planning.

  • Engineering support during project development
  • Procurement and integration support
  • Installation supervision
  • Commissioning and start-up support
  • Operator and maintenance training
  • Performance validation
  • Spare parts and preventive maintenance support
  • Long-term technical assistance

Related processes

Containerized equipment for effluent management in rendering processes
01

Effluent management

Effluent processing concepts for handling, treating, or concentrating liquid streams as part of the full plant design.
Outdoor livestock holding pens context for odour control systems and biofilters
02

Odour control systems & biofilters

Multi-stage air treatment solutions for capturing and treating odourous process air within animal by-product processing facilities.
Pig farming context for fat handling in by-product processing
03

Fat handling

Fat handling solutions for separating, collecting, storing, and preparing animal fat streams for feed, biodiesel, biogas, or energy recovery.

Other applications​