Can you supply the fans and blowers across the whole plant, or only one duty?
Across the whole plant. We engineer deep-tank aeration blowers, digester and biogas boosters, odour-control and biofilter exhaust, sludge-drying and handling air, corrosive H₂S exhaust, and the general and dilution ventilation of the pump and blower houses. Each is engineered to its own pressure, gas and corrosion load — the high-static aeration blower and the flammable-biogas booster are different machines — but they come from one partner, on one engineering convention across the plant.
Our odour and digester air is full of H₂S. What metallurgy do you use?
We size the metallurgy to your gas analysis. Hydrogen sulphide at high humidity forms sulphuric acid on the casing wall, so on the wetted surfaces we select 316L or Corten, step to FRP, epoxy or rubber lining where the H₂S is severe, and detail casing drainage and insulation so acidic condensate cannot pool and pit the steel. Plain mild steel can pit through in a season on this duty, so the right answer depends on your H₂S concentration, moisture and temperature, and we engineer it to your gas, not a default.
The aeration blowers run continuously and drive our power bill. How do you keep them efficient?
Deep-tank aeration is a continuous high-static duty, typically 400 to 800 mmWC under 4 to 8 m of water column, running 24x7 as the plant's biggest single load. We size the wheel onto its best-efficiency region at your exact aeration duty rather than forcing a catalogue fan onto the spec, and we default to VFD control so the blower tracks the diurnal air demand without the throttling loss of a damper. Bearings and construction are rated for genuine continuous service with a long L10 design life, because every point off best efficiency costs energy every hour of every day.
Digester biogas is flammable. How do you make the biogas booster safe?
The biogas booster and its surroundings are a classified hazardous area, so we build spark-resistant construction to AMCA 99 with non-sparking rubbing surfaces, a gas-tight welded and sealed casing to contain the methane-rich biogas, and we self-declare ATEX Zone 2/22 per 2014/34/EU (Category 3) where the area classification calls for it. We engineer the safety scope to your stated zone and gas composition, not a generic rating, and we name the boundary of that scope up front.
Can you build a replacement to match our existing blower's duty and footprint?
Yes. We reverse-engineer to the existing duty point (flow, static pressure, gas temperature, density and gas composition), bearing centres, inlet/outlet orientation and foundation bolt pattern so the unit drops onto the existing base and ducting, whether it is an aeration blower, a biogas booster or an odour-control fan. Made to your installation, not a nearest-catalogue substitute. Send the old GA, the nameplate and a curve if you have one, and we match it.
Do you performance-test the fans, and what about AMCA, CE, ATEX and quality certification?
Every fan is performance-tested in-house to the AMCA 210 / ISO 5801 method on our 200 HP VFD test rig, and dynamically balanced to ISO 21940 G6.3 as standard (G2.5 / G1.0 on application). To be precise: that in-house testing is to the AMCA 210 / ISO 5801 method, not AMCA-certified; CE is self-declared per 2006/42/EC and 2014/35/EU, and ATEX Zone 2/22 is self-declared per 2014/34/EU (Category 3) where the biogas area classification calls for it — those are self-declarations of conformity, not third-party certifications. Our only third-party certification is ISO 9001:2015.
