An effects-based approach to regulating the pulp and paper industry: the New Zealand scene

1997 ◽  
Vol 35 (2-3) ◽  
pp. 321-328 ◽  
Author(s):  
P. Dell ◽  
R. Donald ◽  
J. McIntosh
Keyword(s):  
Sustainable Management ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Environmental Concerns ◽  
Environmental Legislation ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Regulatory Approach

New Zealand's primary environmental legislation, the Resource Management Act (RMA), was enacted in 1991. The RMA is effects based rather than activity based and is intended to promote the sustainable management of natural and physical resources. A number of New Zealand's pulp and paper mills are now coming under the permitting requirements of the RMA. The prime environmental concerns have been associated with the two kraft mills, and include dissolved oxygen, color, toxicity, nutrients and impacts on fisheries. This paper presents a case study of one of these mills and discusses the regulatory approach which is to be adopted under the constraints of the RMA.

scholarly journals Present trends and future prospects for poplar utilization in Alberta

1991 ◽  
Vol 67 (3) ◽  
pp. 271-274 ◽  
Author(s):  
W. J. Ondro
Keyword(s):  
Populus Tremuloides ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Future Prospects ◽  
Private Lands ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Oriented Strandboard ◽  
Year 2000

Between 1980 and 1990, poplar (mainly trembling aspen, Populus tremuloides Michx.) harvested on Crown and private lands in Alberta increased from 2.4 to 24.7% of the total harvest. In 1987-90, three oriented strandboard mills used more than 40% of the 1.4 million m3 of annual harvest of poplar from Crown and private lands. By the year 2000, the poplar harvest of five pulp and paper mills to be built between 1990 and 2000 is expected to reach about 8.5 million m3. By then, the pulp and paper industry will use about four-fifths of all poplar cut in Alberta.

Correlation of wood-based components and dewatering properties of waste activated sludge from pulp and paper industry

2010 ◽  
Vol 62 (2) ◽  
pp. 387-393 ◽  
Author(s):  
H. Kyllönen ◽  
J. Lehto ◽  
P. Pirkonen ◽  
A. Grönroos ◽  
H. Pakkanen ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Paper Industry ◽  
Bound Water ◽  
Calorific Value ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Waste Activated Sludge ◽  
Paper Mills ◽  
Elementary Analysis ◽  
Solids Content

Large amounts of wet sludge are produced annually in municipal and industrial wastewater treatment. Already in pulp and paper industry, more than ten million tons of primary sludge, waste activated sludge, and de-inking sludge is generated. Waste activated sludge contains large quantities of bound water, which is difficult to dewater. Low water content would be a matter of high calorific value in incineration but it also has effects on the volume and the quality of the matter to be handled in sludge disposal. In this research waste activated sludges from different pulp and paper mills were chemically characterised and dewatered. Correlations of chemical composition and dewatering properties were determined using multivariate analysis. Chemical characterisation included basic sludge analysis, elementary analysis and analysis of wood-based components, such as hemicelluloses and lignin-derived material. Dewatering properties were determined using measurements of dry solids content, flux and flocculant dosage. The effects of different variables varied according to the response concerned. The variables which were significant regarding cake DS increase in filtration or centrifugation and flocculant dosage needed in filtration were different from those which were significant regarding flux.

Energy efficient aeration of wastewaters from the pulp and paper industry

2010 ◽  
Vol 62 (10) ◽  
pp. 2364-2371 ◽  
Author(s):  
M. Sandberg
Keyword(s):  
Oxygen Transfer ◽  
Biological Treatment ◽  
Bubble Column ◽  
Paper Industry ◽  
Electrical Power ◽  
Treatment Plant ◽  
Pulp Mill ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Paper Mills

More than 50% of the electrical power needed to treat pulp and paper industry effluents is used for aeration in biological treatment stages. A large share of the oxygen that passes through the wastewater is not consumed and will be found in the off-gas. Energy can be saved by aerating under conditions where the oxygen transfer is most efficient, for example at low concentrations of dissolved oxygen Consider the sludge as an energy source; electricity can be saved by avoiding sludge reduction through prolonged aeration. High oxygen transfer efficiency can be retained by using the oxygen consumption of biosolids. Quantified savings in the form of needed volumes of air while still achieving sufficient COD reduction are presented. The tests have been made in a bubble column with pulp mill process water and sludge from a biological treatment plant. These were supplemented with case studies at three pulp and paper mills.

Techniques for Closing the Water Circuits in the Pulp and Paper Industry

1994 ◽  
Vol 29 (5-6) ◽  
pp. 11-18 ◽  
Author(s):  
Howard Edde
Keyword(s):  
Biological Treatment ◽  
Paper Industry ◽  
Pulp And Paper Industry ◽  
Pulp And Paper ◽  
Environmental Legislation ◽  
Assimilative Capacity ◽  
Knowledge Requirements ◽  
Technological Developments ◽  
The 1960S ◽  
Organic Halogens

The focus of this paper is on the earlier, recent and future developments in closing the water circuits in pulp and paper production. During the 1960s the U.S. pulp and paper industry was in its environmental infancy concentrating mainly on removal of settleable solids and initiating river assimilative capacity studies. The 1970s began with environmental legislation having enforceable powers to achieve primary and secondary (biological) treatment which was fundamentally fulfilled during the 1980s. The late 1980s and early 1990s opened with toxicity becoming the major environmental issue as measured mainly by absorbable organic halogens (AOX) and dioxins. This paper identifies progress and key technological developments towards furthering stringent environmental enhancement and provides additional knowledge requirements leading into the next century.

Upgrading aerated lagoons at pulp and paper mills

1997 ◽  
Vol 35 (2-3) ◽  
pp. 117-122 ◽  
Author(s):  
Thomas Welander ◽  
Anders Löfqvist ◽  
Anders Selmer
Keyword(s):  
Paper Industry ◽  
Pulp And Paper ◽  
Full Scale ◽  
Support Material ◽  
Treatment Efficiency ◽  
Pulp And Paper Mills ◽  
Paper Mills ◽  
Treated Effluent ◽  
Pilot Plant Scale ◽  
One Year

The possibility of improving the efficiency of aerated lagoons treating pulp and paper industry effluents by introducing a support material for microbial growth was studied on a pilot plant scale. Two 20 m3 pilot plants were operated for approximately one year in parallel with full-scale aerated lagoons at two Swedish pulp and paper mills. A support material specifically developed for application in aerated lagoons was installed in the pilot plants. A considerably higher treatment efficiency was obtained in the pilot plants than in the full-scale lagoons. While 30-40% of the COD was removed in the full-scale lagoons, a COD-removal of 60-70% was achieved in the pilot plants. Phosphorus, an important discharge parameter at both mills, was removed to 60-70%, while the removal in the full scale lagoons was only 0-10%. The suspended solids in the treated effluent after clarification was around 20 mg/l.

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