The abbreviation dbds stands
for Deutsche Biogas Dach-Systeme GmbH. And for the combination of
established experts and (individual) firms that have specialised in the
fields of biogas and industrial plant construction for years. Every single
permanent partner is a specialist who has set his own standards in service
and innovation, thereby contributing to the success and strength of the
Quality, safety, reliability and efficiency: these are the virtues with which we have adopted our customers' objectives. We understand our customers' confidence in the value of dbds as an investment. We work continuously to assure the best possible return on this investment. Day-for-day we continue to develop our services and processes to set new standards in terms of technology, process safety or efficiency – for industrial and agricultural operations as well as for plant builders and developers.
All our products have proven their market maturity in thorough long-term tests and field trials. The various individual demands of our customers and their respective uses and applications constitute the focus of advice, development and implementation of a dbds solution. Thus all properties and quality specifications of our systems are developed to take account of the processes in which they are to be implemented later. Our guarantee of the greatest possible safety is the result of thinking outside our own box. Therefore we monitor, document and evaluate all of our manufacturing stages and those of our suppliers using comprehensive quality assurance procedures.
Technology and products
All dbds products – whether standard products or customised solutions – are developed and implemented in line with all applicable laws, guidelines, technical regulations and recommendations. This includes structural analysis of our roofs in accordance with DIN 1055, taking account of the respective snow and wind loads, and their adaptation to all container systems. All of the materials used by dbds are developed and produced specifically for use in biogas plants. The membranes are flame-retardant according to DIN 4102 B1, methane gas permeability is significantly below the limit values, and the industrially produced, all-over high-frequency welded seams are up to 8 cm wide.
The dbds double-membrane roof systems are designed for containers
up to a diameter of 40 m
up to a gas operating pressure of 20 mbar
up to a gas storage volume of 6,500 m³
The roof systems can be fitted to containers made out of concrete, steel or enamelled steel. Depending on the customer's wishes and requirements, the following components on the roof system can be individually adapted, selected and manufactured.
The single-shell biogas container roof systems can be delivered in "gas-tight" or "odour-tight" versions. The material used for the single-shell roof system is a PVC-coated polyester fabric, which has been especially developed and produced for use with biogas tanks. The material is very flame-retardant according to DIN 4102 B1 and UV-resistant. Materials with a weight of 800 g/m² to 1,500 g/m² are used. The gas permeability of the membrane is between <200 cm³/(m² d bar) and <500 cm³/(m² d bar). It is available in the standard colours of silver grey (similar to RAL 7001) and moose green (similar to RAL 6005). However, the membranes can also be delivered in special colours on request. The material is high-frequency welded.
External gas tanks offer additional gas storage capacity in order to compensate for production fluctuations, consumption fluctuations, volume changes due to variations in temperature and consumer devices becoming idle, as well as to store already produced gas for future use.
1. Overpressure/underpressure safety unit, up to 20 mbar, heatable
The overpressure/underpressure safety unit is a safety device that protects the
roof system from damage if the pressure in the gas space is excessively high or
low. The overpressure/underpressure safety unit is mounted on the outside of the
container wall. The pressure safety unit uses immersion cups with a liquid
receiver. The fill level of the liquid receivers is indicated by means of a
check tube or inspection window.
2. Gas level measurement (hydrostatic and mechanical)
Hydrostatic fill level indication with signal:
Hydrostatic fill level measurement is used to determine the height of the gas
storage membrane at a specific point. The measuring principle of determining the
height is based on hydraulic transmission. Explosion-protected with signal
output (analogue 4 to 20 mA) and including VA cover.
Repair and replacement of other manufacturers' equipmen
Double membranes for special-shaped containers (e.g. rectangular)