Biogasclean MUW - Make-Up-Water System - Biological H2S Removal
Biogasclean’s MUW® system gives lowest operating costs. Biological H2S removal has much lower OPEX than chemical gas cleaning. In addition to a small power consumption the biological process requires supply of liquid and nutrients. Normally this is supplied as water and NPK fertilizer. But with prober pre-treatment treated water from an anaerobic digester or an aeration pond can be used as scrubber liquid and nutrient source. The MUW® (Make-Up-Water) system allows you to use digested wastewater or the liquid fraction of separated digested manure.
This is cheaper than water and industrial fertilizer and gives the lowest OPEX of any H2S removal system. In order to prevent clogging inside the scrubber tank the larger particles in the treated water shall first be removed. Wastewater with small amounts of particles (palm oil, cassava, paper & pulp) only requires a simple screening. Wastewater with significant amounts of particles (pig and cattle manure) requires separation into a liquid and solid fraction by screw press or decanter.
After removal of particles the wastewater is mixed with scrubber liquid with low pH. The sulfate (SO4) reacts with calcium (Ca) and magnesium (Mg) and form sludge. The sludge and particles settle in the MUW® tanks before being used in the scrubber tanks.
Using treated water does not only generate a direct saving in water and NPK fertilizer. It also causes that the digested manure is not diluted by water. This reduces the amount of digested manure to be transported from the biogas plant to the farmer and the amount to be applied to the fields.
Saving the environment and money at the same time.
The most important differences between Biogasclean’s solutions and alternative biological H2S removal systems are safety and automatic reliable operation.
- Safety. Injection of air into biogas is possible with a control system; without there is a substantial risk of creating dangerous situations with explosive mixture. Therefore, Biogasclean systems are supplied with a control system which will adjust air injection to the actual biogas flow and stop air injection in case there is no biogas flow. If the PTU is closed, the safety system will also remove the ignition source by cutting the power supply in case the gas detector should measure methane above 25% of the Lower Explosive Level (LEL).
- Safety – Learn more ?
- Automatic reliable operation. Safety is mandatory; but on top of that the control system also secures good performance even with fluctuations in the biogas flow. The system is automatically controlled by the PLC controller board which reduces the risk for manual errors and operation problems. The main function is to provide safe, optimal and stable conditions for the biological process. The signals can be made available in the control room.
- Low operating costs. The system uses no chemicals and has a very low electrical consumption. In many projects we use treated water from an anaerobic digester or an aeration pond as scrubber liquid and nutrient source. This is easily accessible and cheaper than water and industrial fertilizer.
- Guaranteed performance. We provide performance guarantees on all projects.
