Pronal, a recycled paper plant, produces craft paper. The plant produces an average flow of 14,000 m3/day (3.7 MGD) of wastewater with high contents of Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD) and Total Suspended Solids (TSS).
As oil prices remain high, we are in the midst of a nation-wide initiative to seek renewable sources of energy to increase energy efficiency and energy security. Renewable energy accounted for 13.2% of the domestically produced electricity in 2012. Among the sources of renewable energy is the production of biogas from landfill gas (LFG) or digester gas. By Scott Rouse, VP Product Management, Sierra Instruments
As global conditions place more stress on water resources, a great deal of attention is being paid to water reuse technologies, particularly those that facilitate the reuse of the next level of difficult-to-treat or highly variable raw water sources.
Over the past several years, we've had overwhelming response and feedback to several articles we've written about using ozone for water and wastewater disinfection. The profound drought across many areas of the country has piqued interest in this wastewater reuse, and more specifically how ozone can play a role. This article answers some of the most common questions about ozone systems for wastewater applications.
A Kaeser EBS series screw blower is making wastewater treatment considerably more efficient and effective at the Goldsteig dairy factory in Cham in the Upper Palatinate region in Germany.
Solids Retention Time (SRT) is a critical activated sludge design and operating parameter. The selection of an SRT has many consequences related to process performance, sludge production, and oxygen requirements. By Dr. Robert Smith, Sarah Elger, and Scott Mleziva, YSI, a Xylem brand
When California’s Sonoma County Water Agency (SCWA) wanted to improve its sludge solids dewatering as part of a major sludge handling upgrade, they were seeking an alternative to outdated sludge belt press/conveyor technology.
In 2008, AnoxKaldnes Hybas™ designs were completed by Veolia for the upgrade of the Field’s Point Wastewater Treatment Facility to meet new seasonal effluent limits for TN and TIN.
The NEOSEP® MBR system features Kruger’s uniquely designed K-120C and K-240C flat sheet membrane modules. The modules offer several innovative design features that enhance ease of installation, operation and maintenance. This includes an integrated central lifting eye, offering an incredibly well balanced module that makes installation and retrieval a simple and stress-free process.
A North Carolina-based specialty chemical manufacturer, a major producer of insect repellent, was looking for a better way to measure the liquid level in its glass-lined agitated reactor. The company uses a number of complex technologies to manufacture sebacates, adipates, isophthalates, catalysts, alkyds, and other natural and renewable chemistries based on castor and citrates.
Excess ammonia in receiving waters causes algal blooms that decrease oxygen levels. For this reason, many wastewater treatment plants (WWTPs) must limit ammonia in discharge. Mike Rousey, Hach Company
The Dallas County Water and Sewer Authority (DCWSA) in Selma, Alabama recently found itself in a tough spot: under the scrutiny of the Alabama Department of Environmental Management (ADEM). The wastewater treatment system needed better means for control. Ammonia, TSS, cBOD, and TKN readings were out of compliance. Then they discovered a new testing method known as simplified-TKN (s-TKN), and with it, better process control to achieve regulatory compliance. By Andrew Antonio, Municipal Wastewater Market Manager and Derek Walker, Applications Development Manager
Water quality laboratories across the nation are faced with both a rising level of water quality awareness amongst the general public, as well as rising costs in water quality monitoring. As a result, laboratories are looking for more efficient ways to provide higher quality monitoring.
Hexanal is one of many well-documented aromatic components that contribute to flavor and aroma in common consumer food products containing omega-6 fatty acids. Hexanal content is also used to measure the oxidative status of foods rich in omega-6 fatty acids.
Pesticide residue laboratories are required to undertake analyses of an ever increasing number of samples. The analyses typically involve use of multi-residue methods (both GC-MS and LC-MS) to test for over 500 pesticide residues.
Radar technology is often viewed as the “best” method of level measurement, but this isn’t necessarily true in the water industry.
After reviewing multiple methods, engineers and operators at a Pennsylvania water reclamation facility discover a winning pretreatment formula for reverse osmosis biofouling control.
Spearheaded by three strong “ladies” and plenty of vision, DC Water’s Clean Rivers Project creates massive tunnels to rid the city of combined sewer overflows.
In its latest effort towards advancing resource recovery, The Water Environment & Reuse Foundation (WE&RF) has assembled a network and directory of water resource recovery test beds: 46 facilities across the country that are willing and able to run pilots for researchers and technology providers.
California’s inland communities have been hit hard by four years of drought, lower groundwater levels, and reduced allocations from the State Water Project.
Technologies which could transform the shape of the water industry of the future will be on show at the fifth BlueTech Forum, to be held in San Francisco.