scholarly journals Assessing an Integral Treatment for Landfill Leachate Reverse Osmosis Concentrate

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1389
Author(s):  
Javier Tejera ◽  
Daphne Hermosilla ◽  
Ruben Miranda ◽  
Antonio Gascó ◽  
Víctor Alonso ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Landfill Leachate ◽  
Light Emitting Diode ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Ultra Violet ◽  
Mercury Vapor ◽  
Matter Content ◽  
Lime Treatment ◽  
Integral Treatment

An integral treatment process for landfill leachate reverse osmosis concentrate (LLROC) is herein designed and assessed aiming to reduce organic matter content and conductivity, as well as to increase its biodegradability. The process consists of three steps. The first one is a coagulation/flocculation treatment, which best results were obtained using a dosage of 5 g L−1 of ferric chloride at an initial pH = 6 (removal of the 76% chemical oxygen demand (COD), 57% specific ultraviolet absorption (SUVA), and 92% color). The second step is a photo-Fenton process, which resulted in an enhanced biodegradability (i.e., the ratio between the biochemical oxygen demand (BOD5) and the COD increased from 0.06 to 0.4), and an extra 43% of the COD was removed at the best trialed reaction conditions of [H2O2]/COD = 1.06, pH = 4 and [H2O2]/[Fe]mol = 45. An ultra violet-A light emitting diode (UVA-LED) lamp was tested and compared to conventional high-pressure mercury vapor lamps, achieving a 16% power consumption reduction. Finally, an optimized 30 g L−1 lime treatment was implemented, which reduced conductivity by a 43%, and the contents of sulfate, total nitrogen, chloride, and metals by 90%. Overall, the integral treatment of LLROC achieved the removal of 99.9% color, 90% COD, 90% sulfate, 90% nitrogen, 86% Al, 77% Zn, 84% Mn, 99% Mg, and 98% Si; and significantly increased biodegradability up to BOD5/COD = 0.4.

scholarly journals Short investigation on occurrence and removal of semivolatiles during wastewater treatment processes

2021 ◽  
Vol 3 (2) ◽  
pp. 130-140
Author(s):  
Maria Diana Puiu ◽  
Keyword(s):  
Wastewater Treatment ◽  
Organic Contaminants ◽  
Biological Treatment ◽  
Organic Matter Content ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Matter Content ◽  
Physical Treatment ◽  
Dissolved Air Flotation ◽  
Treatment Processes

The food industry wastewater is known to present a high organic matter content, due to specific raw materials and processing activities. Even if these compounds are not directly toxic to the environment, high concentrations in effluents could represent a source of pollution as discharges of high biological oxygen demand may impact receiving river's ecosystems. Identifying the main organic contaminants in wastewater samples represents the first step in establishing the optimum treatment method. The sample analysis for the non-target compounds through the GC-MS technique highlights, along with other analytical parameters, the efficiency of the main physical and biological treatment steps of the middle-size Wastewater Treatment Plant (WWTP). Long-chain fatty acids and their esters were the main abundant classes of non-target identified compounds. The highest intensity detection signal was reached by n-hexadecanoic acid or palmitic acid, a component of palm oil, after the physical treatment processes with dissolved air flotation, and by 1-octadecanol after biological treatment.

scholarly journals Applicability of biological wastewater treatment for various industries

2021 ◽  
Vol 941 (1) ◽  
pp. 012001
Author(s):  
Basamykina Alena ◽  
Kurkina Ekaterina ◽  
Kameristaya Maria
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Anaerobic Treatment ◽  
Matter Content ◽  
Biological Wastewater Treatment ◽  
Aerobic Treatment ◽  
Total Organic Matter ◽  
Inorganic Substances

Abstract Biological treatment methods are used to remove organic and some inorganic substances from wastewater using the simplest organisms that use these substances for nutrition, breaking them down using cellular processes. The article deals with the aerobic, anaerobic and anoxic stages of biological wastewater treatment. Their differences are explained and the best way to use biological processes is analyzed according to the type of industry/production. At wastewater treatment plants, anaerobic treatment is often used at first to remove a significant part of organic substances from wastewater before sending them for further aerobic treatment. Aerobic treatment is effective for various types of wastewater, especially with lower biochemical oxygen demand (BOD) and chemical oxygen demand (COD). A comparative analysis of wastewater composition from food, oil and gas processing, pharmaceutical and pulp and paper industries was carried out. In the presence of organic compounds, the technology is chosen depending on the total organic matter content or the total COD content, which characterizes the total organic matter in water. A combination of anaerobic and aerobic methods is possible, if a discharge into the sewer system or into water bodies is required. The grounds for the application of biological wastewater treatment of these industries are given.

scholarly journals Characterization of the Primary Sludge from Pharmaceutical Industry Effluents and Final Disposition

Processes ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 231 ◽  
Author(s):  
Renata Xavier Alberico Freitas ◽  
Lara Aguiar Borges ◽  
Handray Fernandes de Souza ◽  
Fernando Colen ◽  
Alex Sander Rodrigues Cangussu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Physicochemical Characteristics ◽  
Matter Content ◽  
Primary Sludge ◽  
Volatile Solids ◽  
Object Of Study ◽  
Final Disposition

The generation of large volumes of waste by industrial processes has become an object of study because of the necessity to characterize the composition of residues in order to suggest appropriate treatments and to minimize adverse environmental impacts. We performed analyses of total fixed and volatile solids, moisture, and chemical oxygen demand (COD). We found high organic matter content. We also measured physicochemical characteristics, including corrosivity, reactivity, and toxicity. Sewage sludge showed levels of chloride and sodium above the maximum allowed limits. These data suggest the potential for anaerobic digestion as a treatment option for sewage sludge and for its use as a biofertilizer.

scholarly journals Potential of Wastewater Valorization after Wet Extraction of Proteins from Faba Bean and Pea Flours

2020 ◽  
Vol 03 (02) ◽  
pp. 1-1
Author(s):  
Sofía Albolafio ◽  
◽  
María I. Gil ◽  
Ana Allende ◽  
Epameinondas Xanthakis ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Organic Matter ◽  
Environmental Impact ◽  
Faba Bean ◽  
Phenolic Content ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Value Added ◽  
Matter Content ◽  
Two Stages

The present study aimed to characterize wastewater fractions obtained after the wet extraction of proteins from legumes. In addition, the suitability of wastewater fractions for the potential recovery of high value-added compounds was also examined, and consequently, the prevention of the environmental impact of these wastes was explored. Similar to the industrial production of proteins, wet alkaline and acidic extractions of proteins from faba bean and pea flours were performed in two stages of extraction. The different wastewater fractions were characterized by measuring their organic matter content, total solids (TS), total dissolved solids (TDS), electrical conductivity (EC), pH, and turbidity. The value-added compounds from these wastewater fractions were quantified, which included the protein content, carbohydrate content, phenolic content, and antioxidant activity. In addition, the phenolic compounds in these factions were identified and quantified. It was observed that the fractions obtained in the first extraction stage had 60%–90% higher organic matter content, measured as the chemical oxygen demand (COD), compared to the second fractions, indicating a higher environmental impact of the former in case of disposal. The results obtained for COD, TS, TDS, EC, pH, and turbidity demonstrated that microfiltration reduced only the turbidity (85%), and consequently, a decrease was observed in the particulate matter, while there was a practically negligible reduction in the soluble matter. Wastewater from faba exhibited the highest polyphenol content and antioxidant activity, and was, therefore, considered the most valuable fraction for potential valorization.

Effect of ionizing radiation on antioxidant compounds present in cork wastewater

2013 ◽  
Vol 67 (2) ◽  
pp. 374-379 ◽  
Author(s):  
J. Madureira ◽  
R. Melo ◽  
M. L. Botelho ◽  
J. P. Leal ◽  
I. M. Fonseca
Keyword(s):  
Gamma Radiation ◽  
Radiation Effects ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Reducing Power ◽  
Matter Content ◽  
Added Value ◽  
Total Phenolic ◽  
Antioxidant Compounds ◽  
Cooking Water

A preliminary study of the gamma radiation effects on the antioxidant compounds present in cork cooking water was carried out. Radiation studies were performed using radiation between 20 and 50 kGy at 0.4 and 2.4 kGy h−1. The radiation effects on organic matter content were evaluated by chemical oxygen demand. The antioxidant activity was measured by ferric reducing power assay. The total phenolic content was studied using the Folin-Ciocalteau method. Results show that gamma radiation increases both the amount of phenolic compounds and antioxidant capacity of cork cooking water. These results highlight the potential of this technology for increasing the added value of cork waters.

scholarly journals Saccharomyces cerevisiae growth kinetics study dairy byproduct

2013 ◽  
pp. 169-172
Author(s):  
Erika Sulyok ◽  
Györgyi Bró ◽  
János Tamás
Keyword(s):  
Food Industry ◽  
Low Cost ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Optimization Methods ◽  
Matter Content ◽  
Kinetics Study ◽  
Storage Tanks ◽  
Milk Whey ◽  
By Products

By guess, annual volume of milk whey is 185–190 million tons and this volume probably will increase next years. Whey has significant biochemical oxygen demand due to its high organic matter content so whey as sewage is one of the most pollutant by-products in the food industry. Apart from environmental pollution, benefit of several whey constituents for human health is another reason to utilize whey. Corn and potato, as well as the processing of milk in the food industry in large quantities of by-products generated by low cost, substantial quantities of starch and lactic acid, which are due to high biological oxygen demand are considered as hazardous waste. Some of them are destroyed sewage storage tanks, and those products are excellent substrates for the growth of microorganisms could be. The traditional nutrient solution optimization methods are solution and time-consuming and are not able to determine the real optimum because of the interaction of factors involved.

Recovering Ammonium-Nitrogen and Phosphorus through Struvite from Anaerobic Digested Effluent of Poultry Wastewater: Effects of Reagent Ratio and pH

2012 ◽  
Vol 433-440 ◽  
pp. 1253-1259 ◽  
Author(s):  
Hong Rui Yang ◽  
Ya Lei Zhang ◽  
Ue Fei Zhou ◽  
Hong Guang Zhu
Keyword(s):  
Organic Matter Content ◽  
Oxygen Demand ◽  
High Strength ◽  
Ammonium Nitrogen ◽  
Matter Content ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Nitrogen And Phosphorus ◽  
Poultry Breeding ◽  
Poultry Wastewater

Fermentation wastewater generated from livestock and poultry breeding contains high strength of ammonium-nitrogen and phosphorus, which has the huge nutrient recovery value. To recover nitrogen and phosphorus from the fermentation wastewater, struvite precipitate is a promising option. This paper focused on the ratios of reagent adding and pH optimizing during the ammonium and phosphate recycling through struvite precipitate. Using MgCl•6H2O and NaHPO4•12H2O as precipitants, the optimum conditions were discussed in the paper. The results indicated that during a reaction time of 30min and a mixed speed of 100r/min , the ammonium and phosphate were removed by 89% and 88.7%, respectively at pH 10.5 and a molar ratio of Mg:N:P=1.2:1:1. In addition, it could reduce the organic matter content with a COD(Chemical Oxygen Demand ) removal efficiency of 36.2%. The recovered struvite had been suggested to display excellent fertilizer qualities, and also could be recycled and reused as a resource of nitrogen and phosphorus.

scholarly journals Valuable product production from wood mill effluents

2010 ◽  
Vol 62 (10) ◽  
pp. 2294-2300 ◽  
Author(s):  
T. Mato ◽  
M. Ben ◽  
C. Kennes ◽  
M. C. Veiga
Keyword(s):  
Organic Matter ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Matter Content ◽  
Valuable Product ◽  
High Chemical Oxygen Demand ◽  
Complex Organic ◽  
Aerobic And Anaerobic

Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand (COD), low pH and nutrients limitation. Aerobic and anaerobic processes have been used for their treatment. Presently, bioplastics production (mainly polyhydroxyalkanoates or PHA) from wastewaters with mixed cultures is being studied. Substrate requirements for these processes are a high organic matter content and low nutrient concentration. Therefore, wood mill effluents could be a suitable feedstock. PHA production from wastewaters is carried out in three steps. First, complex organic matter is converted into volatile fatty acids (VFA) through acidogenic fermentation. Then, VFA are used as substrate in an aerobic sequencing batch reactor (SBR), in which the enrichement of PHA producing bacteria from a mixed culture is favoured. Finally, the sludge from the SBR is fed with a pulse containing high VFA concentrations, resulting in PHA accumulation inside the cells. In this work, the possibility of applying this process to wood mill effluents is proposed. An acidification percentage of 37% and a storage yield (YSTO) of 0.23 Cmmol/Cmmol were obtained.

scholarly journals Bioplastic production using wood mill effluents as feedstock

2011 ◽  
Vol 63 (6) ◽  
pp. 1196-1202 ◽  
Author(s):  
M. Ben ◽  
T. Mato ◽  
A. Lopez ◽  
M. Vila ◽  
C. Kennes ◽  
...  
Keyword(s):  
Volatile Fatty Acids ◽  
Treatment Process ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Matter Content ◽  
High Chemical ◽  
Acidogenic Reactor ◽  
High Chemical Oxygen Demand ◽  
Synthetic Media ◽  
Different Cultures

Fibreboard production is one of the most important industrial activities in Galicia (Spain). Great amounts of wastewater are generated, with properties depending on the type of wood, treatment process, final product and water reusing, among others. These effluents are characterized by a high chemical oxygen demand, low pH and nutrients limitation. Although anaerobic digestion is one of the most suitable processes for the treatment, lately bioplastics production (mainly polyhydroxyalkanoates) from wastewaters with mixed cultures is being evaluated. Substrate requirements for these processes consist of high organic matter content and low nutrient concentration. Therefore, wood mill effluents could be a suitable feedstock. In this work, the possibility of producing bioplastics from to wood mill effluents is evaluated. First, wood mill effluent was converted to volatile fatty acids in an acidogenic reactor operated at two different hydraulic retention times of 1 and 1.5 d. The acidification percentage obtained was 37% and 42%, respectively. Then, aerobic batch assays were performed using fermented wood mill effluents obtained at different hydraulic retention times. Assays were developed using different cultures as inoculums. The maximum storage yield of 0.57 Cmmol/Cmmol was obtained when when the culture was enriched on a synthetic media.

scholarly journals The muddy bottom sediments of the old river beds of the lower Vistula

2016 ◽  
Vol 16 (3) ◽  
pp. 141-146
Author(s):  
Daria Mimier ◽  
Janusz Żbikowski
Keyword(s):  
Organic Matter ◽  
Water Content ◽  
Bottom Sediments ◽  
Organic Matter Content ◽  
Oxygen Demand ◽  
Dry Weight ◽  
Matter Content ◽  
Sediment Oxygen Demand ◽  
Muddy Bottom ◽  
High Sediment

Abstract The main objective of this study was to characterize the muddy bottom sediments of three hydrologically different old river beds of the lower Vistula, located in the vicinity of Toruń: Port Drzewny, Martwa Wisła and Przybysz. Samples were taken at monthly intervals from April to November 2015 from two (Martwa Wisła and Przybysz) or three sampling sites (Port Drzewny) located in the central parts of the reservoirs. The bottom sediments of these water bodies were characterized by a low water content and organic matter content expressed as a percentage of dry weight, high organic matter content expressed in units of weight, as well as a high sediment oxygen demand. The most distinct reservoir was Martwa Wisła, most likely due to the lack of a connection with the River Vistula.

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