A large percentage of package water treatment plants today operate using obsolete or inefficient backwash methods. These methods can be improved upon by monitoring basic parameters to initiate a clarifier flush and a filter backwash based upon set-time intervals, headloss across the media, and effluent turbidity.
Thousands of water and wastewater treatment facilities use granular media filters. An operational control system – along with media configuration, underdrain system, and backwash process – is an important consideration because it determines how water flow is controlled through the filter.
Four basic types of operational control systems are used in gravity filtration, with some variances from plant to plant. Each has advantages and disadvantages.
Originally published in Water Environment Federation's World Water Magazine.
In a corporate-academic partnership unique to algal research, WesTech Engineering, Inc. and Utah State University’s Sustainable Waste-to-Bioproducts Engineering Center (SWBEC) are developing processes for more efﬁcient harvesting of algae from municipal wastewater and other nutrient-rich sources. Floyd Grifﬁths of WesTech Engineering, Inc. reports on joint research efforts for converting algae into high-value bioproducts.
Corporations frequently establish joint research partnerships with universities in diverse ﬁelds; however, such collaboration seldom occurs in algal research, which has almost exclusively remained within the province of universities.
The Town of Peru’s early 90s era water treatment plant began facing difficulties meeting new water treatment regulations, causing the town to invest $3 million in water system upgrades to improve the overall quality of the water and help meet the regulations. The investment included improvements in storage tower mixing systems, reservoir dredging, and treatment plant upgrades. All aspects of the improvements relate to reducing organics that lead to the creation of disinfection byproducts such as THMs and HAA5s.
Category: Water Treatment
As plants are installed further north, water treatment performance can be affected by the elements, such as colder weather conditions, wind blowing across the water source, and formation of organics.
The Northern Village of Ile a La Crosse, Saskatchewan, operates a surface water treatment plant for their drinking water supply. The existing facility, which serves 1,600 residential and commercial businesses, was at design capacity, and thus was having difficulty keeping up with demand. Further, the water treatment plant was struggling to meet regulatory requirements.
Category: Water Treatment
Not every utility that cleans wastewater views itself as a wastewater treatment plant.
“Some utilities have started making the shift from saying ‘we make clean water’ to saying ‘we recover resources from water,’” said Matt Williams, an anaerobic digestion/biosolids expert from WesTech. “They are seeing themselves as water resource recovery facilities.”
Category: Renewable Energy
Q&A with Mark Boner, Creator of the FlexFilter™ Technology
Q: What trends do you see in the design and construction of wastewater collection and/or treatment systems?
A: More stringent treatment requirements are being imposed by the regulatory community. Two major issues driving these mandates include the control and treatment of wet weather flow, and nutrient removal.