Colour removal from fermentation industry effluents

1999 ◽  
Vol 40 (1) ◽  
pp. 331-338 ◽  
Author(s):  
B. Inanc ◽  
F. Ciner ◽  
I. Ozturk
Keyword(s):  
Surface Waters ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Ozone Treatment ◽  
Lime Treatment ◽  
Colour Removal ◽  
Treatment Processes ◽  
Iron Salts ◽  
Coagulation And Flocculation ◽  
Annual Total

Large amounts of effluents from the fermentation industry are characterized by high COD and colour. Although significant reduction in COD is achieved through biological treatment processes, a substantial amount of colour remains. Coagulation and flocculation with alum and iron salts are not effective for colour removal. This is due to the nature of colour causing compounds which are almost totally dissolved and resistant to biodegradation. Hence, fermentation industries face difficulties in discharging their coloured effluents into either sewers or surface waters. In this study, colour removal from biological treatment plant effluents of a fermentation industry with lime and ozone was investigated experimentally. Optimum lime dose for reducing the colour to values around 1000 Pt-Co was found as 10.0 g/l, while 0.9 g/l ozone was necessary to obtain the same residual colour. Economic evaluation has indicated that cost of lime treatment was 1.3 to 1.4 USD/m3 while it was 2.5 USD/m3 for ozone treatment. Annual total costs for lime and ozone treatment were also estimated as 2 million USD and 3.65 million USD, respectively.

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 Occurrence and Sources of Synthetic Musk Fragrances in the Sewage Treatment Plants and the Han River in Seoul, Korea

2020 ◽  
Author(s):  
Ju-Hee Hong ◽  
Jun-Yeon Lee ◽  
Hyun-Ju Ha ◽  
Jin-Hyo Lee ◽  
Seok-Ryul Oh ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Synthetic Musk ◽  
Han River ◽  
Treatment Processes ◽  
Musk Fragrances ◽  
Receiving Water

Levels of synthetic musk fragrances (SMFs) and various personal care products (PCPs) were measured in the Han River and its tributaries in Seoul, Korea. The most abundant SMF in all river and PCP samples was 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta[g]isochromene (HHCB), followed by 1-(3,5,5,6,8,8-hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone (AHTN), musk ketone (MK), and 1,1,2,3,3-pentamethyl-2,5,6,7-tetrahydroinden-4-one (DPMI). There was a significant correlation between the SMF concentration in the PCPs and the Han River samples. Moving from upstream to downstream in the Han River, the median SMF concentration was 6.756, 2.945, 0.304, and 0.141 μg/L in the sewage treatment plant (STP) influent, effluent, tributaries, and mainstream, respectively, implying that effective SMF removal was achieved during the sewage treatment process, followed by dilution in the receiving water. Four STPs using advanced biological treatment processes had removal efficiencies of 55.8%, 50.6%, 43.3% for HHCB, AHTN, and MK, respectively. The highest SMF concentrations in the tributaries were observed at locations close to the STPs. Our study confirmed that the main source of SMFs in the receiving water were sewage effluent containing untreated SMFs, which are largely originated from household PCPs, especially hair care products (e.g., shampoo) and perfumes.

Offensive Tastes and Odors Occurring after Chlorine Addition in Water Treatment Processes

1988 ◽  
Vol 20 (8-9) ◽  
pp. 269-274
Author(s):  
Y. Levi ◽  
J. M. Jestin
Keyword(s):  
Biological Treatment ◽  
Treatment Plant ◽  
Absolute Threshold ◽  
Chemical Analyses ◽  
Chemical Parameters ◽  
Robot Assisted ◽  
Treatment Processes ◽  
Physico Chemical ◽  
Finger Printing ◽  
One Year

To identify and eliminate the causes of tastes and odors in drinking water,we have developed a new robot-assisted methodology for absolute threshold flavor determination called “up and down”. A study undertaken at an important biological treatment plant in the suburb of Paris (France) over a period of one year, allowed us to compare results from physico-chemical analyses with those of up and down threshold (UDT) values.This work also demonstrated the very important influence of chlorination on water quality.Furthermore, a number of physico-chemical parameters like POX-TOX and THM were shown to be unsuitable for the prediction of UDT values, but chromatographic finger printing after CLSA extraction and ECD detection showed a possible relationship with UDT.In addition, processes involving dechlorination, stripping and ozonation have been developed to remove chlorine-like odors from treated water supplies.

Biotreatability of Blow Heat Condensates with and without Hydrogen Peroxide Pretreatment

1994 ◽  
Vol 29 (5-6) ◽  
pp. 229-238 ◽  
Author(s):  
D. A. Barton ◽  
E. P. Drake
Keyword(s):  
Hydrogen Peroxide ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Biological Response ◽  
Pulp Mill ◽  
Ferric Ion ◽  
Reduced Sulfur Compounds ◽  
Treatment Processes ◽  
Adverse Impacts ◽  
Study Results

Pulp mill modifications implemented by kraft mills for the purposes of controlling air emissions, such as the installation of indirect secondary condensers installed in blow heat handling systems, may result in altered characteristics of wastewater treatment plant influents. This study examines the impacts on biological treatment processes associated with the presence of blow heat condensates in the influent stream. In addition, the effectiveness of pretreatment of the condensate stream with hydrogen peroxide, in the presence of the ferric ion, is examined under controlled conditions through the use of bench-scale bioreactors. The study results indicate that the presence of blow heat condensates may adversely impact the mixed liquor settleability properties in the activated sludge process, although subsequent trials conducted to re-create this condition were not successful. Effluent soluble BOD5 was not affected by the presence of the condensates. Ferric/peroxide pretreatment was found not to be effective at destroying either the methanol or the turpentine present in the condensate stream. However, a significant improvement in Microtox biological response was observed, presumably due to a reaction between the ferric ion and reduced sulfur compounds. Furthermore, no adverse impacts on settleability were observed in a bio-reactor receiving condensates which were pretreated with ferric/ieroxide.

Treatment of silk and lycra printing wastewaters with the objective of water reuse

1996 ◽  
Vol 33 (8) ◽  
pp. 95-104 ◽  
Author(s):  
S. Rigoni-Stern ◽  
L. Szpyrkowicz ◽  
F. Zilio-Grandi
Keyword(s):  
Water Reuse ◽  
Biological Treatment ◽  
Laboratory Experiments ◽  
Ammonia Nitrogen ◽  
Ozone Treatment ◽  
Printing Industry ◽  
High Concentration ◽  
Colour Removal ◽  
Toxic Compounds ◽  
Gradual Accumulation

This paper concerns the treatment of wastewaters produced during printing matrix washing and by dyestuff leakage in the silk and Lycra printing industry. The objective was to obtain effluent of a quality that would allow water reuse. The raw wastewaters contained a high concentration of ammonia nitrogen (from urea, ammonium sulphate and tartrate used for the dyestuff preparation together with organic compounds. A high BOD5COD ratio determined the possibility of a biological treatment of the wastewaters by nitrification-denitrification. To achieve complete denitrification, however, it was necessary to add an external carbon source. A mixture of methyl and ethyl alcohols from pharmaceutical industry wastes was used to achieve a BOD5N ratio of about 3.5. High temperature (23-26°C) and low inhibition enabled good rates of treatment to be achieved in a single-sludge system, equal to 0.042 kgN/kg MLVSS × day and 0.12 kgN/kg MLVSS × day, respectively for nitrification and denitrification. After this stage the effluents were characterized by COD <120 mg/L, BOD5 <25 mg/L, N-NH4 <10 mg/L, N-NHO3 <12 mg/L, N-NO2 <0.3 mg/L values which meet Italian discharge standards. A subsequent quartz filtration and UV sterilization allowed the wastewaters to be reused for washing purposes within the factory. At the final stage of the wastewater treatment it was possible to economize by reusing industrial wastewaters by 30-40%. No problems connected with a gradual accumulation of the recalcitrant or toxic compounds were encountered in the reuse of treated wastewaters and their subsequent biological treatment during 10 months of full scale plant operation. Residual colour removal was however necessary if the wastewaters were also to be used for the preparing of dyes. Laboratory experiments to remove colour using ozone treatment were conducted. A dose of 20 mg/L of ozone was introduced prior to filtration. This step eliminated not only the residual colour but also the residual non-ionic surfactants. As the final result of the treatment it will be possible to use wastewaters not only for washing purposes but also for preparation of the printing colours; it is calculated that economies of 60-70% of process water will be possible.

The Development of a Neuro-Fuzzy Expert System for Wastewater Treatment Processes Monitoring

2018 ◽  
Vol 69 (1) ◽  
pp. 179-186 ◽  
Author(s):  
Madalina Carbureanu ◽  
Alina Simona Baiesu
Keyword(s):  
Expert System ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Experimental System ◽  
Ph Control ◽  
Graphical Interface ◽  
Treatment Processes ◽  
Coagulation And Flocculation ◽  
Neuro Fuzzy ◽  
Hardware Component

This paper presents the extension of the hardware-software experimental system SENFpHCTRL initially developed for wastewater pH control, for monitoring other parameters (total suspended solids, extractable, biochemical and chemical oxygen demand, phenols and chlorides) from other chemical processes of a treatment plant, such as: precipitation, coagulation and flocculation, oxidation and reduction (processes briefly presented at the begining of the paper). The process of expanding the SENFpHCTRL system involved the adding to the initial expert system of a set of heuristic knowledge for other parameters and the development of the system graphical interface. It is also presented the adapted form of the system hardware component at PC and microcontroller level and the results of the simulations made with the extended system.

scholarly journals Occurrence and Sources of Synthetic Musk Fragrances in the Sewage Treatment Plants and the Han River, Korea

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 392
Author(s):  
Ju-Hee Hong ◽  
Jun-Yeon Lee ◽  
Hyun-Ju Ha ◽  
Jin-Hyo Lee ◽  
Seok-Ryul Oh ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Treatment Process ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Synthetic Musk ◽  
Han River ◽  
Treatment Processes ◽  
Musk Fragrances ◽  
Receiving Water

Levels of synthetic musk fragrances (SMFs) and various personal care products (PCPs) were measured in the Han River and its tributaries in Seoul, Korea. The most abundant SMF in all river and PCP samples was 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta(g)sochromene (HHCB), followed by 1-(3,5,5,6,8,8-hexamethyl-6,7-dihydronaphthalen-2-yl)ethanone (AHTN), musk ketone (MK), and 1,1,2,3,3-pentamethyl-2,5,6,7-tetrahydroinden-4-one (DPMI). The most abundant SMF in both PCPs and the Han River samples was HHCB, followed by AHTN. Moving from upstream to downstream in the Han River, the median SMF concentration was 6.756, 2.945, 0.304, and 0.141 μg/L in the sewage treatment plant (STP) influents, effluents, tributaries, and mainstream, respectively, implying that effective SMF removal was achieved during the sewage treatment process, followed by dilution in the receiving water. Four STPs using advanced biological treatment processes had removal efficiencies of 58.5%, 56.8%, and 38.1% for HHCB, AHTN, and MK, respectively. The highest SMF concentrations in the tributaries were observed at locations close to the STPs. Our study confirmed that the main source of SMFs in the receiving water were sewage effluents containing untreated SMFs, which largely originate from household PCPs, especially hair care products (e.g., shampoo) and perfumes.

The Problem of Phosphorus in France – Its Presence in Natural Waters and Biological Phosphorus Removal

1985 ◽  
Vol 17 (11-12) ◽  
pp. 1-9 ◽  
Author(s):  
J. C. Vinçonneau ◽  
F. Schaack ◽  
A. F. Boschet ◽  
D. Chevalier ◽  
D. Villesot ◽  
...  
Keyword(s):  
Surface Waters ◽  
Biological Treatment ◽  
Natural Waters ◽  
Sewage Treatment ◽  
Biological Phosphorus Removal ◽  
Nutrient Inputs ◽  
Treatment Processes ◽  
Physico Chemical ◽  
Efficient Control ◽  
Biological Phosphorus

The problem of nutrient inputs to surface waters is reviewed. These inputs lead to eutrophication and an undesirable decrease in water quality. The origin and effects of eutrophication, and the principles of its control are described. The preferred method of control is through the reduction of phosphorus inputs. The origins of phosphorus inputs and methods of limiting these are considered, in particular through physico-chemical and biological treatment processes in sewage treatment plants. It is concluded that efficient control of eutrophication through reduction of phosphorus inputs is possible.

Elimination of micropollutants and hazardous substances at the source in the chemical and pharmaceutical industry

2007 ◽  
Vol 56 (12) ◽  
pp. 119-123 ◽  
Author(s):  
C. Blöcher
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Pharmaceutical Industry ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Hazardous Substances ◽  
Advantages And Disadvantages ◽  
Treatment Processes ◽  
Pharmaceutical Production

Industrial wastewater, especially from chemical and pharmaceutical production, often contains substances that need to be eliminated before being discharged into a biological treatment plant and following water bodies. This can be done within the production itself, in selected waste water streams or in a central treatment plant. Each of these approaches has certain advantages and disadvantages. Furthermore, a variety of wastewater treatment processes exist that can be applied at each stage, making it a challenging task to choose the best one in economic and ecological terms. In this work a general approach for that and examples from practice are discussed.

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