Environmental Engineering Reference
In-Depth Information
manure and slurries in biogas plants is, in most cases, motivated by the
environmental and farming benefits delivered by manure management and
the avoidance of negative environmental impacts from animal production.
For source-separated household waste, the primary aim is sustainable waste
management, waste reduction and recycling of organic matter. For
wastewaters, the objective is often removal of their organic load in order
to facilitate further disposal. In the case of energy crops, the main aim of
AD is production of renewable methane.
2.3.7 Feedstock description and declaration
Each type and load of feedstock supplied to a biogas plant should be
accompanied by documentation containing a detailed description of the
material, provided by the feedstock producer. The following basic
information must be included as a minimum.
Origin. The name and address of the feedstock producer and supply
company where these are not one and the same, which process the waste
originates from and the raw materials or original processed materials
used in the process.
.
For household waste, the area from where waste was collected, whether
or not it is source-separated and type of collection containers used
(plastic bags, paper bags, bins, other).
.
Methane potential.
.
.
Chemical composition (pH, dry matter, organic dry matter, macro- and
microelements).
Contamination (chemical and biological).
.
Description (color, texture, consistency, smell, etc.).
.
Potential hazards related to handling, storage or recycling as fertilizer.
.
Particle size.
.
Availability (amount and length of time material of the same quality is
available).
.
The feedstock description and declaration is an official document that
should be archived at the biogas plant. The producer is responsible for
supplying feedstock in conformity with the declared quality, which should
be controlled at the biogas plant. All feedstock types should be analyzed and
tested regularly in order to maintain quality standards and adhere to the
legal requirements for feedstock quality. Feedstock quality management is
an important measure intended not only to avoid any possible AD process
inhibitions, operational disruptions or heavy wear of the biogas installation
components, but also to prevent any actual or future threats to human and
animal health and the environment caused by introducing unwanted
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