Process monitoring and automation can improve efficiencies in wastewater treatment systems. A number of parameters well worth monitoring, as well as tips for implementation are described There is growing interest in automating wastewater treatment processes across a broad range of…
Excessive growth of filaments and biopolymers in activated sludge should be controlled in CPI wastewater-treatment plants, as both lead to sludge that is hard to handle. The sticky behavior of such sludge can be minimized by the addition of polyaluminum…
Understanding pump internals, especially the various sealing and coupling arrangements, is a critical step in selecting the optimal pump There is a significant risk for operators associated with the pump selection process. Economic issues, such as procurement and operating costs,…
Advancements in efficiency and the ability to handle a wide array of chemicals combine to make the air-operated double-diaphragm (AODD) pump a useful choice for chemical processors The circumstances surrounding the development of the air-operated double-diaphragm (AODD) pumping principle six…
Presented by The Water Environment Federation (Alexandria, Va.; www.wef.org), the Weftec 2016 conference and exhibition will take place Sept. 24–28 at the Morial Convention Center in New Orleans, La. In addition to an exhibit hall featuring nearly 1,000 exhibitors, this…
This methodology facilitates multifactor testing. However, it comes at a price: a loss in power for detecting effects The traditional approach to experimentation — often referred to as the “scientific method” — requires changing only one factor at a time…
The U.S. Department of Labor's Occupational Safety and Health Administration (OSHA) and Mine Safety and Health Administration, in partnership with the National Institute for Occupational Safety and Health (NIOSH), have initiated a "Hear and Now – Noise Safety Challenge." According…
The Numatics 503 Series valve manifold (photo) enables end users to configure up to three safety circuits in a production machine. The manifold can create up to three independent electro-pneumatic safety zones, while also allowing independent non-safe sections to coexist…
After this company created the possibility to design GRP (glass-reinforced polymer) control stations for use in hazardous areas, it has now made this possible with stainless-steel local control stations with up to 15 modules (photo). The selection and placement follows…
With the basic segment coupler (photo) — the successor to SK1 and SK2 — Profibus PA nodes appear as DP nodes in the distributed control system (DCS) and can be configured and diagnosed without additional tools. The basic segment coupler…