Krohne

Ultrasonic vs. Differential Pressure Flowmeters for High Pressure Steam Service: Part 1 of 2

Renewable energy poses well-publicized opportunities in the quest to reduce fossil fuel consumption and global warming. However rarely mentioned are the new challenges associated...

Wastewater Facility Upgrades Prove Their Worth

Clarifier pre-construction at Addison; worn gearbox, cracked walls and a worn arm that would often stick. Working alone in New York State, approximately 90 to...
Control Activated Sludge

How to Control Activated Sludge with Online Sensors: Part 3 of 3

Figure 3: On-Off Control Dissolved Oxygen Response (source: Meck, D., R. Odum, N. Wobbrock, Cornell University) In the final piece of this series, we detail...
Seawater Desalination

Challenges of Low Boron Removal Requirements in Large-scale Seawater Desalination Plants for the Semiconductor...

In part 1 of this series, we began a discussion of a seawater desalination process that takes the boron removal issue to the edge,...
Online Sensors

How to Control Activated Sludge with Online Sensors: Part 2 of 3

In part 1 of this series, we introduced a broad view of the use of online instrumentation for control of wastewater treatment aeration, which,...
Low Boron Removal

Challenges of Low Boron Removal Requirements in Large-scale Seawater Desalination Plants for the Semiconductor...

With the increasing demand for electronic grade silicon, and particularly the growth of silicon solar cells, the semiconductor industry is facing the challenge of...
Activated Sludge

How to Control Activated Sludge with Online Sensors: Part 1 of 3

The goal for domestic wastewater treatment in the twenty-first century should be to have a minimal carbon footprint and to be 100 percent self-sustainable...
Oxygen and Ozone

Odor and Corrosion Control in Wastewater Collection Systems: Part 5 of 5

Aside from H2S vapor levels, the total and dissolved sulfides and DO levels (liquid phase) should be examined. For this discussion, only the grab...
Chopper pump

Chopper Pump or Dual-Shafted Grinder?

Flushable wipes continue to inundate pump stations throughout North America, clogging both pumps and pipes and often requiring operators to remove the offending debris...

Odor and Corrosion Control in Wastewater Collection Systems: Part 4 of 5

In order to effectively rate the successful treatment of the force main, a background against which to make a comparison must be provided. In...