Bilgeri EnvironTec GmbH products

Digester Equipment

Bilgeri EnvironTec - Roof Manhole

A roof manhole is an opening in the roof that is required for carrying outrepair and inspection workand for transporting bulky equipment in and out of the fermentation tanks. With theEnvironTec RMH roof manhole, we have developed a versatile solution with a generous internal opening for safe and convenient access to tanks and containers. The material for the roof manhole is usually stainless steel V4A and an NBR round cord is used as a seal.

Bilgeri EnvironTec - Hydraulic Safety Valve

A hydraulic safety valve limits the gas pressure in the fermenter with regard to overpressure and underpressure. As the digestion towers required for the production of biogas must be gas-tight to prevent air contact and gas leaks, a safety device is required which blows off gas when the gas outlet is closed or blocked, thus preventing an impermissible overpressure from building up in the tank.

Bilgeri-EnvironTec - Inspection Glass

An inspection glass is used for simple and unhindered observation of the processesinside digesters (e.g. formation of floating layers). TheEnvironTec inspection glass systemcan be integrated into a manhole lid or gas dome or simply installed in the reactor roof or outer wall using a separate insert. EnvironTec inspection glasses are available invarious sizes. Windshield wipers, spraying devices, inspection glass lights (also explosion-proof) and protective covers can be supplied as additional equipment. The soda lime glass material in accordance with DIN 8902 is highly resistant and break-proof.

Bilgeri-EnvironTec - Foam Trap

Duringoperation of digesters,foam may form in the gas compartmentunder certain circumstances (e.g. during mixing processes in the reactor, due to gas injection processes, disadvantageous composition of the digested sludge, temperature influence, etc.).

Bilgeri-EnvironTec - Lateral Manhole

The EnvironTec lateral manhole LMH ensures quick and easy opening / closing of the manhole cover by means of spindle lock.

Bilgeri-EnvironTec - Lateral Manhole

The EnvironTec lateral manhole LMHII ensures quick and easy opening / closing of the manhole cover of the manhole cover by means of an optional swivel device.

Bilgeri EnvironTec - Spraying Unit

During operation of digesters, sludge islands floating on the surface of the digested sludge or the formation of entire floating layers can occur under certain circumstances.

Equipment for Anaerobic Digesters

Double-Pipe Sludge Heat Exchanger

Our double-pipe heat exchanger is used to efficiently heat sludge at biogas and waste water treatment plants. Using the counter-flow principle, sludge is heated evenly, and flows back to the process. Our WT is custom-designed, manufactured entirely in stainless steel.

Anaerobic Digester Cleaning Spraying Nozzle

Under certain circumstances during operation of anaerobic digesters,it might occur that floating sludge crusts are formed. Using the EnvironTec's SU Spraying Unit, this stratification can be effectively combated without the need to open the vessel.

Biogas Treatment / Biogas Conditioning

Refrigerant Gas Dryer

Biogas always contains water vapour in an unsaturated state. During combustion, the water vapour results in considerable corrosion damages to the gas engines and turbines. Malfunctions caused by these damages lead to significant downtimes and high repair costs. The use of a gas dehumidification systems can considerably extend the engines’ service life and notably reduce maintenance costs. The condensation of the water vapour in the gas is caused by temperature reduction which in turn results in a dehumidification. A post-heating stage reduces relative humidity, setting biogas to optimal conditions for activated carbon filter and/or CHPs. The EnvironTec's gas de-humidification process presents a cost-effective solution in this context. Gas dehumidification modules are available in performance ranges offering gas flow rates from 100 to 6000 Nm³/h. Special designs are also available on request.