Search

Pulp mills are moving closer to closure with newer effluent minimization technologies. The totally chlorine free pulp bleaching method was thought to be the best route to closure for many years. However, in recent years the elemental chlorine free method are in operation at mill scale. There are a number of issues, such as system scaling, which must be considered, and many pulp mills worldwide are using updated technologies., The heated debate over elemental chlorine free (ECF) vs totally chlorine free (TCF) pulp bleaching reached its zenith a few years ago and has since settled into a few barbs [...]

Miller Western Pulp Ltd's pulp mill in Meadow Lake, Saskatchewan, has been running as a zero-effluent operation since Feb 1992. Evaporation, concentration, steam stripping and chemical recovery are linked with a zero-effluent process with no major equipment changes aside from changes in operating pH and temperature. Closure of the effluent loop involves suspended solids removal, mechanical vapor recompression evaporation, steam-driven concentration, distillate bio-polishing, concentrate incineration and makeup and boiler feedwater treatment. The effluent comes out of the recovery boiler as sodium bicarbonate ingots, which are sent to landfills., BCTMP mill sets standard for innovative mechanical vapor recompression evaporation operation MILLAR WESTERN PULP LTD. IS USING CONVENtional technology in an unconventional way at its 240,000-a.d.-tpy BCTMP mill in Meadow [...]

Liberty Fabrics is researching a system, developed and used in Europe, to treat plant effluent by electrolysis. Hydropur, as the system is called, is eliminating 99% of effluent dye color, 98.8% of the copper, 98.9% of the zinc, 99.9% of the chromium TOT, and 80% of the chromium VI in test results. An effluent basin has been set up at Liberty's Gordonsville, VA, dyeing and finishing plant, where dye discharge is sent before going through electrolytic treatment.

An effluent sampling station was constructed at the Niagara Falls Wastewater Treatment Plant. The 900-sq ft, one-story building was designed by O'Brien and Gere Engineers Inc. It supports effluent sampling, continuous effluent monitoring, microbiological testing, effluent toxicity testing, future effluent chemical additions, influent sampling and industrial monitoring equipment storage., A NEW effluent sampling station was recently constructed at the Niagara Falls Wastewater Treatment Plant. The station was the result of a two-stage planning and design effort that examined several [...]

Take the effluent strain off the drain The publication of the Green Bill and the privatisation and shifting roles of the water authorities have made water and liquid effluent control [...]

NEW COLOR ABATEMENT STRATEGIES INCLUDE END-OF-PIPE TREATMENT Effluent color control technology for the bleached kraft mill of the 1990s is currently available but not yet commercially viable Increasing public awareness [...]

INDUSTRY'S EFFLUENT PROBLEMS SPAWN NEW ENGINEERING TECHNOLOGY, DESIGN Papermakers, system designers, and equipment manufacturers join ranks to answer increasing environmental demands of 1990s Traditionally, in North America at least, the [...]

Even in the food sector, deregulation has been the name of the political game in the UK for the past two decades. But one important area has bucked the trend: [...]

Financial and environmental constraints mean the efficient management of effluent within the plant is increasingly important. It doesn't make you money but you've got to do it. That is the [...]

Pulp mills are upgrading their sludge clarifiers to improve effluent water treatment systems. Mill operators are increasing their emphasis on water treatment in anticipation of impending 'Cluster Rule' regulations from the Environmental Protection Agency. Reducing freshwater usage, increasing the use of polymers to boost water clarification and installing higher-efficiency 'reactor clarifiers' are techniques for upgrading clarifier capacity., The EPA's 'Cluster Rule' will force many mills to improve their effluent treatment systems--some in anticipation of the rule, others in reaction to it. Although the stringent monthly average of [...]

The use of chlorine in wastewater treatment calls for dechlorination process for environmental protection as well as to ensure water quality for reuse. The process may be done mechanically, through aeration, or chemically, through the use of sulfur dioxide and sulfur dioxide-containing compounds. Choosing which of these chemical options to use depends on other factors aside from cost considerations. These include plant size, safety and convenience, operator requirements and frequency of use., Chlorine is a standard chemical used to disinfect wastewater because it is an inexpensive microbiocide that is extremely effective over a wide range of conditions. These benefits have a price, [...]

Heikki Hassi, vice-president, Kymi Paper mills points the way to the Totally Effluent Free mill Since the beginning of 1993 several suppliers of bleaching technology or chemicals have introduced new [...]

POPE & TALBOT'S HALSEY MILL LEADS U.S. IN EFFLUENT QUALITY IMPROVEMENT Halsey, Ore., mill's $350-million expansion project will include $80 million to modernize bleach plant and wastewater treatment Pope & [...]

ALTERNATE PROCESS FOR BLEACHING COULD HELP IN REDUCING TOCls, DIOXIN Monox-L technology, successful in five plant trials, maintains pulp quality similar to that produced with chlorine dioxide Recently, pressure on [...]

END-OF-PIPE TREATMENT COSTS CAN BE MINIMIZED IN PROCESS DESIGN STAGE Continuing expansion/modernization activity and increasing environmental pressures prompt mills to examine options for the process design stage The pulp and [...]

PAPER INDUSTRY ON RIGHT TRACK WITH LATEST EFFLUENT CONTROL STRATEGIES Pulp and paper mills have dramatically improved effluent quality, but they now face new, more severe challenges, expert tells P&P [...]

The price of water and effluent treatment is becoming increasingly expensive. Here, utilities consultant John Hall Associates offers a guide to reducing costs Water and effluent charges to industry have [...]

As the very first company to be registered under the European Eco-Management and Audit Scheme (EMAS), Manchester-based Ciba Clayton has more than a passing interest in ensuring that the effluent [...]

At its Holywell complex in North Wales, Associated Octel subsidiary Palmer Research operates some 50 reactors on R&D projects for many UK-based pharmaceutical and petrochemical companies. Wastewater effluent from all [...]

Substances we discard require as much attention as those we create, as the range of equipment designed to regulate and reuse liquid refuse indicates. Action is prompted by threat of [...]

Kruger Inc. is investing C$21 million at its Bromptonville, Que., newsprint mill, with most of the money going for the installation of a new biological effluent treatment system, the company [...]

Pressure from environmental groups and continuing legislation throughout the world is increasing the need to control effluent. There are now various types of media available for use in the treatment [...]

MILLS TRY NEW BLEACHING, WASHING TECHNOLOGY TO CUT EFFLUENT COLOR Although color causes limited health danger, tighter qualitative measurements mean mills must monitor, change effluent releases The discharge of color [...]

ADVANCED WASTE TREATMENT SYSTEM REMOVES COLOR, SUSPENDED SOLIDS Riocell SA (formerly Industria Celulose Borregaard) is a 16-year-old pulp and paper company in Rio Grande do Sul, a city in southern [...]