SEBISLUDGE
SEBISLUDGE
As well as a high-water content, it also contains various organic and inorganic substances, nutrients and bacteria (including some pathogenic forms), and so requires an initial purification treatment..
What types of sludge are treated in anaerobic digestion?
- PRIMARY SLUDGE: derived from the process of primary sedimentation. With a biogas yield of about 300-400 Nm3/tODS, this type has good methane potential and is readily digestible.
- SECONDARY SLUDGE: this derives from the sedimentation produced through processes of biological oxidation. As digestion takes places through an aerobic process, this sludge is less efficient in terms of biogas production (200-300 Nm3/tODS)
INDUSTRIAL SLUDGE
WHAT ARE THE ADVANTAGES OF ANAEROBIC DIGESTION?
- It allows sludge to be reused for energy purposes, enabling a supply from renewable sources.
- It reduces and optimises treatment management costs
- It makes an efficient use of resources, by allowing the reuse of water in industrial processes
- It reduces the bacterial load in sludge
- It reduces the amount of sludge that has to be disposed of, and so cuts the costs of disposal.
Which businesses are the main producers of industrial wastewater?
- Companies that produce meat, fish and dairy products
- Soft drinks companies
- Breweries
- Confectionery companies
- Paper mills
- Textile industry
meat, fish and dairy processing companies, soft drink companies, breweries, confectionery companies, paper mills, the textile industry…
MUNICIPAL SLUDGE
sludge from sewage treatment and urban wastewater treatment plants
The digester and purification system are two complementary and integrated processes, which help to stabilise the sludge and reduce its odorous impact. The anaerobic digester unit can be inserted into the purification system at various stages, depending on the process or the requirements of the plant.
Technical benefits of anaerobic digestion of sludge:
- Reduces the amount of sludge to be disposed of, and the relative costs
- Reduces the energy costs of the existing treatment plant
- Reduces the bacterial load and odour, as a result of stabilising the sludge
- Enables the carbon to be fixed in the form of humus, with slow release of CO₂.