Scale deposits in kraft pulp bleach plants with reduced water consumption: A review

Huber, Patrick; Burnet, Auphélia; Petit‐Conil, Michel

doi:10.1016/j.jenvman.2014.01.053

Cited by 26 publications

(15 citation statements)

References 81 publications

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“…Potassium permanganate consumption pulp with the presence of carryover from (EPO) filtrate Addition of the alkaline filtrate increased the pulp kappa number. The filtrate has large quantities of lignin and extractives (Huber et al, 2014), which increases chemical reagent consumption such as chlorine dioxide and ozone (Brogdon et al, 2015, Sarto et al, 2015 (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

“…The sulfate content in the (EPO) filtrate increased 10 times with the recirculation of 15 kg . odt -1 of carryover, favoring the recovery cycle (Huber et al, 2014). The oxalate content of the (EPO) filtrate was similar and that of the formate increased.…”

Section: Inorganic Compound Accumulation In the Systemmentioning

confidence: 95%

“…The carbonate, chlorate, chloride and sulfate anion concentrations in filtrate after the D stage increased with the addition of the alkaline filtrate to the pre-O 2 pulp at 134; 5.7 and 15 and 267%, respectively. The higher chloride concentration may favor organochlorine (AOX) formation in the filtrates, impairing the treatability of the effluent and the aquatic biota, when released into rivers (Huber et al, 2014).…”

Section: Inorganic Compound Accumulation In the Systemmentioning

confidence: 99%

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The Effects of Alkaline Filtrate Recirculation Towards the Properties of Long Fiber Pulps With Od(epo)ded Bleaching Sequence

Souza

Zanuncio

Colodette

2018

CERNE

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The effects of alkaline fi ltrate recirculation towards the properties of long fi ber pulps with od(epo)ded bleaching sequence. CERNE, v. 24, n. 3, p. 233-239, 2018. HIGHLIGHTS The alkaline fi ltrate recirculation increased the reagents load during bleaching. The alkaline fi ltrate recirculation did not alter the quality of the refi ned pulp. The alkaline fi ltrate recirculation increased calcium, chloride, sodium and sulfate levels in the D stage and sodium and sulfate levels after the (EPO) stage ABSTRACT Circuit closure can reduce water consumption, but negative effects on pulp quality and equipment wear may make it unfeasible. This study aimed to evaluate how the alkaline fi ltrate of the recirculation stage (EP) affects bleaching, pulp quality and characteristics of the fi ltrates produced. Pre-delignifi ed cellulose pulp from a mixture of three coniferous woods was used. Bleaching followed the D(EPO)DED sequence, with the addition of 5, 10 and 15 kg. odt-1 of the alkaline fi ltrate (EP) to the pre-O 2 pulp. The physical and mechanical cellulosic pulp properties were evaluated in the control and with 10 kg. odt-1 of the alkaline fi ltrate. The inorganic compound accumulation in the system was evaluated in the control pulp and with 15 kg. odt-1 of the alkaline fi ltrate. The fi ltrate use increased the ClO 2 consumption for bleaching and sulfuric acid and NaOH to adjust the pH of the stages. The pulp tensile index was higher and the tear index lower with the fi ltrate use in pulp without refi nement, however the properties of refi ned pulp were similar between treatments. The fi ltrate increased the calcium, chloride, sodium and sulfate levels in the D stage and that of sodium and sulfate after the (EPO) stage. Filtrate recirculation can reduce water use, but it increases bleaching costs and metal accumulation in the system. v.24 n.3 2018 THE EFFECTS OF ALKALINE FILTRATE RECIRCULATION TOWARDS THE PROPERTIES OF LONG FIBER PULPS WITH OD(EPO)DED BLEACHING SEQUENCE 234 CERNE SOUZA et al.

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Section: Resultsmentioning

confidence: 99%

Section: Inorganic Compound Accumulation In the Systemmentioning

confidence: 95%

Section: Inorganic Compound Accumulation In the Systemmentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Alkaline Filtrate Recirculation Towards the Properties of Long Fiber Pulps With Od(epo)ded Bleaching Sequence

Souza

Zanuncio

Colodette

2018

CERNE

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“…The composite of such deposits on heat exchanger surfaces in distillation systems leads to poorer thermal operation and unscheduled shutdowns of heat exchanger (Rahman and Amjad 2009;Vidojkovic et al 2013). Scale prevention is technically and economically more effective than redissolution once scale has formed, and scale prediction is an essential step in scale prevention (Huber et al 2014;Villaf 2005). The saturation index utilization has been successful to predict scaling in a wide range of industrial applications (Ferguson 2011;Thompson et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessment of scaling formation during solar desalination using PHREEQC modeling in El Gebail and El Qaa plain areas: southwest Sinai

Mohallel¹,

Metwally²,

Gomaa³

et al. 2016

Renewables

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The fresh water needs of mankind in regions under severe stress due to scarcity of water and energy can be satisfied if saline water which is available is converted to potable water by solar desalination. Beside salinity, scaling formation is one of the major problems that slow down heat transfer and cause system failures. Prevention and minimizing scale formation is highly important in the thermal solar desalination. So, the present study aims to studying individually the chemical characteristics affecting groundwater quality in inland and coastal regions of El Gebail and El Qaa plain areas southwest Sinai to evaluate and map them as feed water for thermal desalination plants. In addition, preparation of scale prediction modeling to estimate deposits on heat exchanger surfaces in distillation units has also been covered. Twenty-four water samples were collected from the study area and chemically analyzed. Water samples in El Qaa plain are of good water quality and can be used for different purposes. Water samples in El Gebail have excess salts for major wells and cannot be used without desalination. Saturation indices for different minerals are carefully studied. The scale prediction based on PHREEQC modeling was employed. In addition, laboratory experimental for evaluation scale precipitation after different recovery percentages of pure water from saline water was used. Results indicate that about 31 % of water samples in El Gebail region are faint coating, 38 % are mild scale forming, and 31 % are mild corrosion. Also, using PHREEQC for simulated evaporation with continuous water feeding of water sample can be used as a technique to quantitatively estimate the impending scale formation in solar desalination systems, which is very important to discover the best location for carrying out solar desalination. Also, the best operating procedure conditions and the best system designs were identified.

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“…Chemical pulping and bleaching generates enormous amounts of waste water containing heterogeneous mixtures of organic and inorganic compounds (including polydisperse lignin-derived polymers) that cause discoloration as well as high chemical oxygen demand (COD), biological oxygen demand (BOD) and toxicity [ 5 ]. Although efforts to achieve sustainable onsite water management have increased over the last few decades [ 8 , 9 ], there is still room for improvement [ 2 ], and paper manufacturers must develop more efficient waste water strategies. Membrane filtration can be used as the basis of so-called “advanced treatment processes” which are inexpensive and have a small footprint, resulting in high quality effluents [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

Treatment of the Bleaching Effluent from Sulfite Pulp Production by Ceramic Membrane Filtration

et al. 2015

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Pulp and paper waste water is one of the major sources of industrial water pollution. This study tested the suitability of ceramic tubular membrane technology as an alternative to conventional waste water treatment in the pulp and paper industry. In this context, in series batch and semi-batch membrane processes comprising microfiltration, ultrafiltration and nanofiltration, ceramic membranes were developed to reduce the chemical oxygen demand (COD) and remove residual lignin from the effluent flow during sulfite pulp production. A comparison of the ceramic membranes in terms of separation efficiency and performance revealed that the two-stage process configuration with microfiltration followed by ultrafiltration was most suitable for the efficient treatment of the alkaline bleaching effluent tested herein, reducing the COD concentration and residual lignin levels by more than 35% and 70%, respectively.

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Scale deposits in kraft pulp bleach plants with reduced water consumption: A review

Cited by 26 publications

References 81 publications

The Effects of Alkaline Filtrate Recirculation Towards the Properties of Long Fiber Pulps With Od(epo)ded Bleaching Sequence

The Effects of Alkaline Filtrate Recirculation Towards the Properties of Long Fiber Pulps With Od(epo)ded Bleaching Sequence

Assessment of scaling formation during solar desalination using PHREEQC modeling in El Gebail and El Qaa plain areas: southwest Sinai

Treatment of the Bleaching Effluent from Sulfite Pulp Production by Ceramic Membrane Filtration

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