Alternatives for treating recirculated newsprint whitewater at high temperatures

1997 ◽  
Vol 35 (2-3) ◽  
pp. 57-65 ◽  
Author(s):  
Oliver Tardif ◽  
Eric R. Hall
Keyword(s):  
High Temperatures ◽  
Biological Treatment ◽  
Membrane Bioreactor ◽  
Treatment Process ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Total Dissolved Solids ◽  
Removal Efficiencies ◽  
Treatment Alternatives ◽  
Dissolved And Colloidal Substances

Four treatment alternatives were investigated for the removal of dissolved and colloidal substances at high temperatures from a simulated closed-system mechanical newsprint whitewater: (i) sequenching batch reactor treatment (SBR), (ii) ultrafiltration (UF), (iii) biological treatment followed by UF (SBR⊕UF) and (iv) membrane bioreactor (MBR) treatment. Contaminants investigated included resin and fatty acids (RFA), dissolved organic carbon (DOC), dissolved chemical oxygen demand (DCOD) and total dissolved solids (TDS). Ultrafiltration alone yielded excellent FA removals at temperatures ranging from 20 to 60°C, but only fair removals (9 to 42%) of TDS, dissolved COD, DOC and RA. Removal efficiencies were generally enhanced when using a membrane of a smaller pore size but did not vary with temperature. The SBR was effective at removing contaminants at temperatures ranging from 20 to 40°C (up to 100% of the RA, 96% of the FA, 76% of the DCOD and 34% of the TDS were removed). However, the performance of the SBR was poor at 45 and 50°C. Batch ultrafiltration of SBR pre-treated whitewater enhanced the removal of target contaminants, compared to SBR treatment alone. The MBR was judged to be the preferable treatment process at high temperatures. It yielded consistent removal efficiencies at temperatures ranging from 40 to 55°C, removing up to 100% of RA and FA, 84% of DCOD and 37% of TDS.

scholarly journals A comparative examination of MBR and SBR performance for municipal wastewater treatment

2021 ◽  
Author(s):  
S. Kitanou ◽  
H. Ayyoub ◽  
J. Touir ◽  
A. Zdeg ◽  
S. Benabdallah ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Membrane Separation ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Superior Performance ◽  
Municipal Wastewater Treatment ◽  
Removal Efficiencies ◽  
Pollution Removal ◽  
Comparative Examination

Abstract In this study, the performance of the membrane bioreactor (MBR) and anoxic–aerobic sequencing batch reactor (SBR) are compared in treating municipal wastewater. The aim of the work was to determine the feasibility of thus systems for the removal of organics matter and nutriments from the municipal wastewater. The MBR displayed a superior performance with removal efficiencies exceeding 99% for TSS, 94% for chemical oxygen demand (COD) and an improvement on SBR efficiencies was found. In the same way, the MBR produced an effluent with much better quality than SBR in terms of total nitrogen (TN) and total phosphorus (TP) removal efficiencies. Combining membrane separation and biodegradation processes or the membrane bioreactor (MBR) technology improved pollution removal efficiencies significantly.

Degradation of wine distillery wastewaters by the combination of aerobic biological treatment with chemical oxidation by Fenton's reagent

2005 ◽  
Vol 51 (1) ◽  
pp. 167-174 ◽  
Author(s):  
J. Beltran de Heredia ◽  
J. Torregrosa ◽  
J.R. Dominguez ◽  
E. Partido
Keyword(s):  
Chemical Oxygen Demand ◽  
Aromatic Compounds ◽  
Biological Treatment ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Chemical Oxidation ◽  
Utilization Rate ◽  
Fenton’S Reagent ◽  
Kinetic Rate Constant ◽  
Fenton's Reagent

The degradation of wine distillery wastewaters by aerobic biological treatment has been investigated in a batch reactor. The evolution of the chemical oxygen demand, biomass and total contents of polyphenolic and aromatic compounds was followed through each experiment. According to the Contois model, a kinetic expression for the substrate utilization rate is derived, and its biokinetic constant is evaluated. The final effluents of the aerobic biological experiments were oxidized by Fenton's reagent. The evolution of chemical oxygen demand, hydrogen peroxide concentration and total contents of polyphenolic and aromatic compounds was followed through each experiment. A kinetic model to interpret the experimental data is proposed. The kinetic rate constant of the global reaction is determined.

SBR treatment of olive mill wastewaters: dilution or pre-treatment?

2012 ◽  
Vol 65 (9) ◽  
pp. 1684-1691 ◽  
Author(s):  
G. Farabegoli ◽  
A. Chiavola ◽  
E. Rolle
Keyword(s):  
Biological Process ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Adequate Treatment ◽  
Olive Mill Wastewaters ◽  
Other Substances ◽  
Removal Efficiencies ◽  
Pre Treatment ◽  
Olive Mill ◽  
Gac Adsorption

The olive-oil extraction industry is an economically important activity for many countries of the Mediterranean Sea area, with Spain, Greece and Italy being the major producers. This activity, however, may represent a serious environmental problem due to the discharge of highly polluted effluents, usually referred to as ‘olive mill wastewaters’ (OMWs). They are characterized by high values of chemical oxygen demand (COD) (80–300 g/L), lipids, total polyphenols (TPP), tannins and other substances difficult to degrade. An adequate treatment before discharging is therefore required to reduce the pollutant load. The aim of the present paper was to evaluate performances of a biological process in a sequencing batch reactor (SBR) fed with pre-treated OMWs. Pre-treatment consisted of a combined acid cracking (AC) and granular activated carbon (GAC) adsorption process. The efficiency of the system was compared with that of an identical SBR fed with the raw wastewater only diluted. Combined AC and GAC adsorption was chosen to be used prior to the following biological process due to its capability of providing high removal efficiencies of COD and TPP and also appreciable improvement of biodegradability. Comparing results obtained with different influents showed that best performances of the SBR were obtained by feeding it with raw diluted OMWs (dOMWs) and at the lowest dilution ratio (1:25): in this case, the removal efficiencies were 90 and 76%, as average, for COD and TPP, respectively. Feeding the SBR with either the pre-treated or the raw dOMWs at 1:50 gave very similar values of COD reduction (74%); however, an improvement of the TPP removal was observed in the former case.

Treatment of slaughterhouse plant wastewater by using a membrane bioreactor

2011 ◽  
Vol 64 (1) ◽  
pp. 214-219 ◽  
Author(s):  
Levent Gürel ◽  
Hanife Büyükgüngör
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Membrane Bioreactor ◽  
Nitrate Nitrogen ◽  
Oxygen Demand ◽  
Organic Substances ◽  
Slaughterhouse Wastewater ◽  
Treated Effluent ◽  
Nitrogen Concentrations ◽  
Removal Efficiencies

The use of a membrane bioreactor (MBR) for removal of organic substances and nutrients from slaughterhouse plant wastewater was investigated. The chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations of slaughterhouse wastewater were found to be approximately 571 mg O2/L, 102.5 mg/L, and 16.25 mg PO4-P/L, respectively. A submerged type membrane was used in the bioreactor. The removal efficiencies for COD, total organic carbon (TOC), TP and TN were found to be 97, 96, 65, 44% respectively. The COD value of wastewater was decreased to 16 mg/L (COD discharge standard for slaughterhouse plant wastewaters is 160 mg/L). TOC was decreased to 9 mg/L (TOC discharge standard for slaughterhouse plant wastewaters is 20 mg/L). Ammonium, and nitrate nitrogen concentrations of treated effluent were 0.100 mg NH4-N/L, and 80.521 mg NO3-N/L, respectively. Slaughterhouse wastewater was successfully treated with the MBR process.

Biological treatment of kraft pulp mill foul condensates at high temperatures using a membrane bioreactor

2005 ◽  
Vol 40 (3-4) ◽  
pp. 1125-1129 ◽  
Author(s):  
João Carlos Teixeira Dias ◽  
Rachel Passos Rezende ◽  
Cláudio M. Silva ◽  
Valter R. Linardi
Keyword(s):  
High Temperatures ◽  
Biological Treatment ◽  
Kraft Pulp ◽  
Membrane Bioreactor ◽  
Pulp Mill ◽  
Kraft Pulp Mill

scholarly journals An integrated process of methanol coagulation and side stream membrane bioreactor for treatment of rice gruel wastewater

2020 ◽  
Author(s):  
Shaik Nazia ◽  
Karishma Mishra ◽  
Veeriah Jegatheesan ◽  
Suresh K Bhargava ◽  
Sridhar Sundergopal
Keyword(s):  
Membrane Bioreactor ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Cost Effective ◽  
Total Dissolved Solids ◽  
Water Production ◽  
Integrated Process ◽  
Aqueous Methanol ◽  
Side Stream ◽  
Effective Removal

Abstract Significant demand for water supply was to expect forthcoming decades. Production of reusable water from industrial and domestic wastewater is a feasible, cost-effective, and significant positive benefit to the environment. In the present study, the domestic rice gruel wastewater (RGW) treated with aqueous methanol coagulation integrated aerobic membrane bioreactor (AMBR). Hydrophilized spiral wound 5 kDa ultrafiltration membrane (HF – UF) used in the bioreactor for the effective removal of pollutants from RGW. Furthermore, the RGW pretreated with various coagulants such as methanol, ethanol, and HCl. The obtained pretreated RGW subjected to the HF-UF 5 kDa side stream AMBR for reusable water production. The experiments conducted to determine the turbidity, conductivity, total dissolved solids (TDS), and chemical oxygen demand (COD) found to be 96 %, 91 %, 91 %, and 94.6 %. The overall process was feasible, compact, environmentally free, cost-effective, eco-friendly.

scholarly journals Development of a cost-effective wastewater treatment process: combination of different process

2021 ◽  
Vol 233 ◽  
pp. 01106
Author(s):  
Song Du ◽  
Wenbiao Jin
Keyword(s):  
Wastewater Treatment ◽  
Catalytic Oxidation ◽  
Treatment Process ◽  
Batch Reactor ◽  
Oxygen Demand ◽  
Cost Effective ◽  
Fenton Oxidation ◽  
Wastewater Treatment Process ◽  
Combination Process ◽  
Electro Catalytic Oxidation

Caprolactam wastewater produced by the production process of caprolactam is characterized by a very high toxicity and chemical oxygen demand (COD) values, having potential harm to the environment if treated improperly. However, these characteristics make caprolactam wastewaters difficult to treat using traditional methods. So the aim of this work was to develop a cost-effective caprolactam wastewater treatment process. Fenton oxidation, sequencing batch reactor activated sludge process (SBR) and electro-catalytic oxidation were proposed to treat caprolactam wastewater in the laboratory scale, and the treatment effects were investigated. Compared with Fenton oxidation, SBR and electro-catalytic oxidation can treat caprolactam wastewater at a lower cost and more efficiently. The pilot test results indicate that the COD can be decreased to less than 1000 mg/L by the combination process, and when the COD removal rates maintain 90%, the cost of caprolactam wastewater treatment is below 6 yuan/m3. The combination process showed better economic benefit.

scholarly journals Biological Treatment of Car Wash Waste Waters

2017 ◽  
Author(s):  
Essi Malinen ◽  
Nico Id ◽  
Sanni Valtonen ◽  
Janne Hakala ◽  
Tiina Mononen ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Water Treatment ◽  
Biological Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Oxygen Demand ◽  
Water Tank ◽  
Waste Waters ◽  
Car Wash

The purpose of this study was to examine how efficient a biological treatment process is in purifying car wash waste waters. Two Finnish automatic car washes having rotating bed biofilm reactors for waste water treatment were included in the study. Both of them are using 87 % of recycled water per car wash and only from 35 to 60 liters of fresh water. Samples were taken from the purified water tank every second week altogether seven times between the beginning of February and the end of May, 2012. The reduction of surfactants was at least 95 % and reduction of chemical oxygen demand (COD) between 87 and 95 % during the sampling period. Outdoor temperature seems not to have any significant effect on purification efficiency. Other water quality parameters such as conductivity, pH, oxygen concentration, total solids, and biological oxygen demand (BOD) were found to be on acceptable level based in comparison to values found in the literature. The high concentration of total nitrogen and total phosphorus in the purified water was caused by nutrients added to the bioreactor for optimal conditions for the microbes. In the studied car washes, the waste water treatment process managed to reduce input load considerably. The main challenges for the quality of purified water seems to be optimal nutrient input as well as on-line monitoring system for water quality.

scholarly journals Performance evaluation and upgrade options for existing sequencing batch reactor for nutrient removal

2019 ◽  
Vol 268 ◽  
pp. 06007
Author(s):  
Jahziel Lantin ◽  
Jeremy Ynnos Abenoja ◽  
Jason Ly ◽  
Cheenee Marie Castillones ◽  
Arnel Beltran ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Treatment Facility ◽  
Study Results ◽  
Hierarchy Process

Assessment and upgrade of existing sewage treatment plants (STPs) are necessary due to the revision of the existing effluent regulations which now monitors nutrients including ammonia, nitrate and phosphates. The aim of this study is the performance evaluation of four sequencing batch reactor (SBR) type of STP based on the following parameters: biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), nitrates, ammonia, phosphates and pH; and their potential upgrade based on the revised regulations stated in DAO 2016-08. Four sequencing batch reactor (SBR) type of STP were assessed for 12 weeks for this study. Results showed noncompliance with nutrient levels, thus upgrade is necessary. Analytical Hierarchy Process (AHP), a Multi-Criteria-Analysis (MCA) tool, was used to select the best option for upgrade among options that include (1) additional SBR tank, (2) diverting wastewater to another treatment facility, and (3) converting the SBR into membrane bioreactor (MBR). Considering the criterion for upgrade, option 2 was the most preferred decision followed by option 1 then option 3.

Treatment of wine distillery wastewater by high rate anaerobic digestion

2007 ◽  
Vol 56 (2) ◽  
pp. 9-16 ◽  
Author(s):  
X.L. Melamane ◽  
R. Tandlich ◽  
J.E. Burgess
Keyword(s):  
Removal Efficiency ◽  
Biological Treatment ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
High Rate ◽  
High Chemical ◽  
Distillery Wastewater ◽  
The Mean ◽  
Removal Efficiencies ◽  
High Chemical Oxygen Demand

Wine distillery wastewaters (WDW) are acidic and have a high content of potential organic pollutants. This causes high chemical oxygen demand (COD) values. Polyphenols constitute a significant portion of this COD, and limit the efficiency of biological treatment of WDWs. WDW starting parameters were as follows: pH 3.83, 4,185 mg/l soluble COD (CODs) and 674.6 mg/l of phenols. During operation, amendments of CaCO3 and K2HPO4, individually or in combination, were required for buffering the digester. Volatile fatty acid concentrations were <300 mg/l throughout the study, indicating degradation of organic acids present. Mean CODs removal efficiency for the 130 day study was 87%, while the mean polyphenol, removal efficiency was 63%. Addition of 50 mg/l Fe3 +  between days 86 and 92 increased the removal efficiencies of CODs to 97% and of polyphenols to 65%. Addition of Co3 +  improved removal efficiencies to 97% for CODs and 92% for polyphenols. Optimization of anaerobic treatment was achieved at 30% WDW feed strength. Removal efficiencies of 92% and 84% were recorded at increased feed strength from days 108 to 130. High removal efficiencies of CODs and polyphenols after day 82 were attributed to the addition of macronutrients and micronutrients that caused pH stability and thus stimulated microbial activity.

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