Blending blowers to reduce total cost of ownership
Problem: The wastewater treatment plant in Letchworth, United Kingdom, sought a blower system with a lower purchase price, superior turndown and high aeration efficiency.
Solution: A blended blower system from Atlas Copco Compressors included a ZBVSD+ high-speed turbo blower to handle the baseline aeration demand and three ZSVSD screw blowers to provide aeration trim for diurnal loading.
Result: The capital cost was 28 percent lower than an all-turbo-blower system. The turndown of the blended blower system is 21-1, versus the 9-1 aeration control an all-turbo system could provide. With the efficiency of the screw blower
