The project will produce dissolving wood pulp (DWP). New DWP fiberlines are similar to paper grade fiberlines (use of kraft process) but require more extensive cooking and washing to remove all lignin and hemi-cellulose. DWP has typically a yield of about 35-38% (on wood) while the yield for paper grade pulp is in the 50-55% range. As the pulp yield for DWP mills (35-38%) is lower than for paper pulp (50-55%), the DWP mill requires a larger recovery boiler which will generate higher electricity production available for sale thus higher air emissions per ton of product.
The design of the mill complies with the Best Available Technology (BAT) and techniques identified in WBG EHS Guidelines for Pulp and Paper. LDC will use total chlorine-free (TCF) bleaching avoiding the formation of Adsorbable Organic Halides (AOX) such as dioxins. In addition, LDC will not use metal chelating agents (i.e. EDTA) in the bleaching process as EDTA has been found to increase the availability of metals and the risk of eutrophication of water bodies receiving the effluents of pulp mills.
Resource Efficiency
The DWP mill will consume 64 MW of electricity corresponding to 1100 kWh/ADt of DWP, which is in line with WBG EHS Guidelines for Pulp and Paper (Table 1a for Kraft Bleached Pulp). All the electricity and steam required will be generated on site from the biomass and recovery boilers. The excess generated electricity will be available for sale. The lime kiln will consume about 100,000 Nm3/day of natural gas. The gas will be trucked to the site with high-pressure cylinders.
The expected water demand from the DWP mill, including water used for cleaning and process restart, is estimated at 1,900 m3/h (0.61 m3/s), which is less than two percent of the low flow (40 m3/s) and less than 0.2 percent of the medium flow (430 m3/s) of the Araguari river at the extraction point. According to the operators of CCBE, the hydropower plant has continuously operated at least one turbine in the last 16 years, which requires a minimum flow of 144 m3. Water consumption per unit of production (32 m3/ADt) will also comply with WBG EHS Guidelines for Pulp and Paper (Table 1a for Kraft Bleached Pulp). About 80% of the water intake will return to the Araguari river as treated effluent. Eucalyptus plantations are not irrigated.
Pollution Prevention
Air Emissions and Ambient Air Quality
The main sources of air emissions are the recovery boiler, the biomass boiler and the lime kiln for the reprocessing of calcium carbonate into calcium oxide. Equipment performance guarantees provided by manufacturers comply with WBG EHS Guidelines for Thermal Power Plants (Table 6c. Boilers) and for Cement and Lime Manufacturing (Table 2. Lime Manufacturing). Predicted performance levels for air emissions are expected to comply with WBG EHS Guidelines for Pulp and Paper (Table 2) taking into consideration the bigger size of the DWP recovery boiler compared to paper pulp. Both diluted non-condensable gases (DNCG) and concentrated non-condensable gases (CNCG) will be burnt in the recovery boiler for control of malodorous gases.
Ambient air quality baseline information was collected by monitoring for two seven-consecutive-days campaigns during the dry and rainy seasons. Levels of NO2, CO, total reduced sulfur (TRS) and H2S were below detection limits, and levels of SO2 and PM10 were below the current applicable intermediary ambient air quality guideline values (padrao intermediario 2 in CONAMA 491/2018). LDC will continue to monitor ambient air quality and report results to lenders as part of the Annual Monitoring Report (AMR).
As part of the environmental licensing process, LDC also prepared an air dispersion model with AERMOD. The study models concentration of pollutants at 12 sensitive receptors including the municipalities surrounding the project and the closest school located 6 km away from the mill. The model includes regular and worst-case scenario air emissions from the lime kiln, recovery boiler and biomass boiler. No other large emitters are present in the area. Based on the air quality monitoring conducted by LDC as part of the ESIA environmental baseline, the airshed is non-degraded, and modeled concentration of pollutants at sensitive receptors contributes less than 25% of the applicable ambient air quality standard as required by WBG EHS General Guidelines for non-degraded airsheds. More precisely, emissions of PM10, PM2.5, SO2 and NO2 contribute less than 2%, 3%, 8% and 15% respectively, of the most stringent guideline values (padrao final) of the national air quality standards (CONAMA 491/2018) at sensitive receptors. Furthermore, the emission rates used in the air dispersion model are the ones published in the ESIA, which are multiple times higher than the predicted performance values. Hence, the project is not expected to significantly impact ambient air quality at sensitive receptors.
Air emissions during construction are typically dust generated from earth moving activities and fumes from heavy equipment. Management of these conditions are contemplated in the ESIA and management plans are defined in the PCA. Road dust in the construction site is currently controlled through water tanks and roads will be paved before releasing the site to contractors for equipment installation. Condition of equipment (including emission of fumes) is verified by LDC before is released to be used in the construction site.
GHG Emissions
About 2.3 million tons of CO2 will be sequestered annually by the 70,000 ha of eucalyptus plantations. Most of this carbon will be transformed into fiber pulp and renewable energy. Nevertheless, a portion of it will be permanently sequestered as soil carbon (at least ~ 0.1 million tons CO2/year). The excess electricity generated from wood waste in the recovery and biomass boilers – about 675,000 MWh per year – will be sold into the Brazilian grid. Considering the Brazilian grid emissions factor (0.2 kg CO2/kWh), this represents 136,000 tons of CO2 avoided emissions per annum.
The main source of GHG emissions from the DWP production process is the consumption of natural gas in the lime kiln (about 90,000 tons of CO2 per year) as all the electricity required will be generated on site from wood waste in the recovery and biomass boilers. The client forest management and harvesting operations as well as log transportation to pulp plant are expected to emit 28,000 tons of CO2 equivalent per year. LDC will measure and report annually GHG emissions as part of the Annual Monitoring Report (AMR).
Wastewater and Water Quality
DWP mill
Process effluents will be treated in a wastewater treatment plant with an installed hydraulic capacity of 2,700 m3/h. Effluents will be released into the Araguari river between two man-made reservoirs (Miranda and Capim Branco) at an estimated rate of 1,900 m3/h. The performance guaranteed values for the wastewater treatment plant are designed to comply with WBG EHS Guidelines for Pulp and Paper (Table 1a. Kraft bleached pulp). The mill will use total chlorine-free (TCF) bleaching avoiding the formation of Adsorbable Organic Halides (AOX) such as dioxins. In addition, the mill will not use metal chelating agents (i.e. EDTA) in the bleaching process as EDTA has been found to increase the availability of metals and the risk of eutrophication of water bodies receiving the effluents of pulp mills.
LDC has conducted effluent dispersion (CORMIX) and depuration (AQUATOOL) studies to assess the impact of the effluents on the Araguari river. These models were revised after publication of the ESIA considering updated effluent emission levels which are lower and closer to the performance guaranteed values of the equipment supplier for the wastewater primary and secondary treatment plant. This revised CORMIX and AQUATOOL models were submitted to the environmental authorities and are included in the environmental license.
CORMIX modeled the mixing zone of biological oxygen demand (BOD), color and total phosphorus with low (Q7,10 = 40 m3/s) and medium (Qm = 430 m3/s) flow. The only aspect of concern is the concentration of total phosphorus during low flow as it will need about 300 m from the release point to achieve a concentration of 0.03 mg/l, which is the applicable national standard for surface water quality of class 2 rivers for lentic environments (CONAMA 357/2005). The model, however, did not include the baseline concentration of total phosphorous in the river, which during the rainy period tends to be above applicable water quality standards.
AQUATOOL simulated scenarios for dissolved oxygen (DO), BOD, organic nitrogen (NO), ammonia (NH3), nitrate (NO3-) and total phosphorus. The model assessed the impact of effluents on the Araguari river along a 46-km stretch, starting from a national water quality monitoring station (ANA ID. 60356000) and ending past the Capim Branco reservoir, distant 20-km downstream from the project’s effluent release point. The model includes water quality baseline data from the ANA monitoring station and effluent discharges from point and non-point sources along the 46-km stretch. Similar to CORMIX, the only parameter of concern is total phosphorus as the river requires 7 km from LDC’s effluent release point to return to its baseline conditions.
Following a complaint from the Department of Water and Sanitation (DMAE) of the Municipality of Uberlandia, who is finalizing the construction of a modern potable water treatment plant with an initial planned capacity of 2 m3/s to provide water to the city of Uberlandia (population 700,000), the project design to discharge eight kilometers upstream from the original discharge point. The effluent discharge will be now located 16 km upstream from DMAE’s water point. This revised design, described in the project’s environmental license, included an analysis of alternatives for the location of the discharge point.
The Araguari river presents good water quality in the project’s area of influence with the exception of phosphorous whose concentration intermittently surpasses the applicable national standard (CONAMA 357/2005 Class 2) during the rainy period. The design of LDC’s wastewater treatment plant approved in the environmental license includes primary treatment with mechanical screens and a clarifier and secondary biological treatment using activated sludge. The design also includes emergency and stormwater basins to redirect effluents into the treatment plant if needed.
(ESAP item nr. 14) While the plant is already designed to comply with national effluent standards (CONAMA 430/2011 and COPAM 01/2008) and WBG EHS Guidelines for Pulp and Paper (Table 1a for Kraft Bleached Pulp), as a precautionary measure, LDC will install and operate a wastewater tertiary treatment plant to further reduce the concentration of nutrients and COD in its effluents as necessary.
In addition, LDC will grant DMAE access in real time to its online continuous monitoring data relating to the waste water treatment effluence allowing them to verify the performance of LDC’s wastewater treatment plant. (ESAP item nr. 15) LDC will as well present the results of its water quality and effluent monitoring program in open meetings to the members of the Comite de Bacia Hidrografica de Araguari (CBH-Araguari) regularly to the extent that the CBH agrees to promote such meetings and receive LDC results.
NMC Forest Unit
To determine potential impacts to surface runoff from silvicultural activities, Duratex monitors surface water quality in one micro-basin (Bacia Hidrográfica Córrego Piçarrão) inside Fazenda NMC. Turbidity, total phosphorus, ammonia, potassium, BOD and dissolved oxygen are measured monthly. In the last decade, minor exceedances have been monitored for these parameters in a limited number of cases (less than 5%). In 2019, water quality analyses were done for 86 parameters including metals and glyphosate. All results were below detection limits and/or below relevant Brazilian standards.
Wastes
DWP mill
The DWP production will generate about 170,000 tons of non-hazardous wastes per annum. All wastes will be composted and reutilized as soil amendments. However, the ESIA also indicates that some of these wastes may go to an industrial landfill as an alternate destination. Currently, the waste management plan is included in the PCA. However, the document is neither comprehensive nor practical for implementation in a construction site. There is also no evidence to indicate that a database to register the waste or a full custody chain (in the form of a manifest) exists for the whole project. (ESAP item nr. 16 and 17) LDC will prepare a Waste Management Plan and Database in line with requirements of Performance Standard 3 to ensure that waste is treated and disposed in an environmentally safe manner and to guarantee its traceability.
Hazardous Materials
DWP mill
LDC will consume about 37,000 tons/year of caustic soda (sodium hydroxide), sodium sulfate, sulfuric acid, hydrogen peroxide, magnesium sulfate, and aluminum sulfate to produce 500,000 tons/year of TCF DWP. Oxygen and ozone will be produced on site. Liquid chemical transportation will be carried out in bulk through tank trucks. As mentioned under Performance Standard 1, Lenzing has been working in the harmonization of management of chemicals procedures, and these will be adopted by the Amadeus project. To prevent and adequately respond to emergencies associated with the transportation of hazardous materials, LDC will prepare a Transportation Safety Plan as described under Performance Standard 4.
NMC Forest Unit
Storage of hazardous materials (agrochemicals) in Fazenda NMC is in line with GIIP. The storage facility is fully fenced and locked with access by a supervisor who must accompany staff into the facility. The interior of the facility is clean, well organized, well signed and ventilated. Protective clothing, material safety data sheets (MSDS) and emergency kits are available on site. The floor of the storage room drains towards a canal that drains into an external spill collection container. Empty agrochemical containers are triple-rinsed, and the rinse water is reused for new applications. Empty containers are also lock up in the storage facility and disposed by an authorized company. The other main sources of hazardous waste are used oils and oil-contaminated wastes from equipment maintenance. These are temporarily stored in adequate areas with secondary containment and disposed by authorized companies.
Pesticide Use and Management
NMC Forest Unit
None of the pesticide active ingredients reported in Duratex’s FSC public summary report (License: SCS-FM/COC-00029P) is included in the WHO’s (World Health Organization) Class 1a or 1b lists of Extremely or Highly Hazardous substances. Glyphosate-based products along with Sulfentrazone-based and Flumioxazin-based herbicides are used for weed control. Detailed technical instructions for the use and application of these materials, including health considerations, are documented in procedures. Sulfluramid-based products are employed to control leaf-cutter ants. Sulfluramid is an organic persistent pollutant included in the Stockholm Convention; Brazil holds an exception under Annex B of the Convention for its use as ant bait. Duratex applies Sulfluramid about 3-months prior to planting and in case of ant infestation. In 2018, an average of 4.35 kg/ha of Sulfuramid-based products were applied in the Fazenda NMC. IFC will require LDC to report the use of Sulfuramid as part of its annual monitoring report (AMR) and will monitor trends in the use of this pesticide by the company. Other pests attacking eucalyptus plantations are the gall wasp (Leptocybe invasa), Gonipterus weevils, and Cylindrocladium fungal diseases in nurseries. Pesticides are not applied systematically but only in case of infestations. Biological control (Beauveria bassiana) is used for the control of Gonipterus. Duratex is a member of the Brazilian Forestry Science and Research Institute (IPEF) and participates in the Cooperative Program in Forest Protection (PROTEF) to promote integrated management of forest pests and diseases and find alternatives to products listed as dangerous by FSC.