Minimization of organic content in simulated industrial wastewater by Fenton type processes: A case study

A combined anaerobic anoxic aerobic reactor for the treatment of the industrial wastewater that contains nitrogen and complex organic compounds as well as its design procedure is presented. The purpose of our experiments was to find a simple methodology that would provide combined reactor design. The reactor is based on the combination of anaerobic, anoxic and aerobic process in one unit only. It was found that the HRT even under 1 hour in the anaerobic zone is long enough for the efficient transformation of complex organic compounds into readily biodegradable COD which is then used in dentrification process. In the N-NO3 concentration range 1.5-50 mg/l the denitrification rate could be expressed as half-order reaction when the CODrb was in excess. N-NO3 removal efficiency is controlled by the recycle flow from the aerobic to the anoxic zone. Nitrification rate can be expressed as first, half or zero-order reaction with respect to effluent N-NH4 concentration. Nitrification rate depends on the dissolved oxygen concentration and hydrodynamic conditions in the reactor. Case study for design of a pilot plant of the combined reactor for treatment of pre-treated pharmaceutical wastewater is shown. Characteristics of pre-treated wastewater were: COD=200 mg/l, BOD5=20 mg/l, N-Kjeldahl=80 mg/l, N-NH4=70 mg/l, N-NOx<1 mg/l, P-PO4=5 mg/l. Legal requirements for treated wastewater were: COD=<100 mg/l, BOD5<5 mg/l, N-NH4=<1 mg/l, N-NOx=<10 mg/l.

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Applying EFDC Explorer model in the Gallinas River, Mexico to estimate its assimilation capacity for water quality protection

Scientific Reports ◽

10.1038/s41598-021-92453-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Claudia Villota-López ◽

Clemente Rodríguez-Cuevas ◽

Franklin Torres-Bejarano ◽

Rodolfo Cisneros-Pérez ◽

Rodolfo Cisneros-Almazán ◽

...

Keyword(s):

Dissolved Oxygen ◽

Industrial Wastewater ◽

Socioeconomic Development ◽

Inorganic Compounds ◽

Organic Content ◽

Phosphorus Compounds ◽

Active Components ◽

Nitrogenous Substances ◽

Efficient Recovery ◽

Assimilation Capacity

AbstractSanitary and industrial wastewater discharged into rivers, is a general problem that occurs in most of the world and Mexico is not the exception, the main goal of this research is to determine based on simulations of pollutants concentrations, the assimilation capacity of the Gallinas River against discharges of agricultural and industrial wastewater from the cultivation and processing of sugar cane under two different hypothetical simulation scenarios, based on reproducing two well know scenarios. In sugarcane cultivation, large quantities of fertilizers are used whose main active components are based on nitrogen or phosphorus compounds, therefore, the wastewater resulting from sugarcane processing contains a high organic content from 20 to 40% of inorganic compounds, such as nitrogenous substances, organic acids, and phosphorous sulfates. For this reason, the physical–chemical variables of interest analyzed in this work are the PO$$_4$$ 4 (phosphate), NO$$_3$$ 3 (nitrate), and DO (dissolved oxygen). With the simulation results according to each scenery, it can be determined, that despite the continuous discharge of polluting elements, the Gallinas River has a good assimilation capacity thanks to reaeration processes that permit efficient recovery of the dissolved oxygen in the water column. Gallinas River is located in the region known as the Huasteca Potosina, this investigation is relevant for the region due to the River is of vital importance being the main tributary that allows socioeconomic development activities in this zone. To carry out the simulations, was used the Explorer Modeling System 8.4 (EFCD) model and was performed two samplings campaign along 15 km in the water body to calibrate the numerical model to represent the dry and wet seasons during May and September respectively named as calibration scenarios.

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Suspended shellfish culture impacts on the benthic layer: a case study in Brazilian subtropical waters

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592012000200012 ◽

2012 ◽

Vol 60 (2) ◽

pp. 219-232 ◽

Cited By ~ 4

Author(s):

Natália de Moraes Rudorff ◽

Carla Van Der Haagen Custodio Bonetti ◽

Jarbas Bonetti Filho

Keyword(s):

Total Population ◽

Organic Content ◽

Multivariate Techniques ◽

Data Sets ◽

Productive Activity ◽

Local Conditions ◽

Benthic Environment ◽

Shellfish Culture ◽

Population Ratio

This study aimed to assess benthic impacts of suspended shellfish cultures in two marine farms located in South Bay, Florianópolis (SC, Brazil). The goal was to detect changes in the benthic layer and evaluate the influence of local conditions, such as hydrodynamics and geomorphology, on the degree of impact at each site. The method included analysis of three groups of oceanographic descriptors: hydrodynamic; morpho-sedimentological (bathymetry, grain size and organic content), and ecological (foraminiferal fauna). Data sets were analyzed using geostatistical and multivariate techniques. Ecological descriptors seemed to be more effective under different environmental conditions than sedimentological variables. Those that best identified culture-related biodeposits, were: dominance of Ammonia tepida; test size; and living: total population ratio. Only slight differences were observed within and outside the culture structures. However, a greater alteration was observed at the site with weaker hydrodynamics and located in shallower depths. The conclusion is that biodeposition at studied still causes little alteration in the local benthic environment. However, local factors such as hydrodynamics and geomorphology were shown to be important in minimizing these impacts. These are criteria that should be considered in site selection programs for the development of this productive activity.

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Performance evaluation of membrane bioreactor for treating industrial wastewater: A case study in Isfahan Mourchekhurt industrial estate

International Journal of Environmental Health Engineering ◽

10.4103/2277-9183.190638 ◽

2016 ◽

Vol 5 (1) ◽

pp. 12 ◽

Cited By ~ 1

Author(s):

Hamide Ebrahimi ◽

MohammadMehdi Amin ◽

Mahnaz Heidari ◽

SeyyedAli Reza Momeni

Keyword(s):

Performance Evaluation ◽

Industrial Wastewater ◽

Membrane Bioreactor ◽

Industrial Estate

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KOMPETENSI PETERNAK SAPI POTONG PERANAKAN ONGOLE DALAM PEMBUATAN KOMPOS (STUDI KASUS PADA KELOMPOK TERNAK MEKAR KECAMATAN DAGANGAN KABUPATEN MADIUN)

JSEP (Journal of Social and Agricultural Economics) ◽

10.19184/jsep.v10i3.5303 ◽

2018 ◽

Vol 10 (3) ◽

pp. 1

Author(s):

Deha Purwoko ◽

Bekti Nur Utami

Keyword(s):

Manufacturing Process ◽

Research Method ◽

Organic Content ◽

Compost Quality ◽

Preparation Stage ◽

Before And After ◽

Descriptive Approach ◽

Quantitative Descriptive ◽

Selection Of

This research aims to describe the level of competence of farmers in composting, and to draft extension and try out the implementation of counseling about composting in group of livestock of Mekar. The research was conducted in sub-district Dagangan of Madiun Regency. Selection of livestock group is done by purposive that is the only group of livestock that have made compost that is group of livestock of Mekar which is located in Kepet village. The research method used is case study with quantitative descriptive approach with scoring. The population is 44 people, the sample is based on the census. The results showed that: 1) the level of competence of farmers in composting is classified with the details of the competence of the preparation stage is low, the competence of the manufacturing process is low, and the competence of the storage stage is classified; and 2) drafting the extension plan based on the target and the purpose of extension so that the breeder know, understand and able to increase the C-Organic content and C / N Ratio on the compost according to the standard. Success shows the improvement of compost quality before and after counseling in accordance with the purpose of counseling. Keywords: competence of breeder, livestock group of Mekar, draft extension, composting, extension

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Influence of Aquatic pH on Dissolved Pb in East Kolkata Wetlands: A Case Study With Reference to Climate Change Induced Acidification

10.21203/rs.3.rs-577162/v1 ◽

2021 ◽

Author(s):

Joystu Dutta ◽

Joysurya Dutta ◽

Tirthankar Sen ◽

Sufia Zaman ◽

Abhijit Mitra

Keyword(s):

Industrial Wastewater ◽

Significant Negative Correlation ◽

Regulatory Effect ◽

Eastern India ◽

East Kolkata Wetland ◽

East Kolkata Wetlands ◽

Increasing Trend ◽

Surrounding Areas ◽

And Shifts

Abstract The present study was undertaken with the databank of dissolved Pb and pH of the aquatic system in the East Kolkata Wetlands, an internationally unique Ramsar Site of Eastern India during a period of twenty years (2000-2019). Our study site is receiving huge amounts of domestic and industrial wastewater from surrounding areas of highly populated metropolitan city of Kolkata. The data on pH exhibits a decreasing trend with the passage of time, which may be attributed to the phenomenon of acidification in which CO2 dissolves with the water and shifts the pH to a lower value. This may result in the dissolution of accumulated Pb in the sediment and transfer the same to the overlying aquatic phase. The increasing trend of dissolved Pb confirms the hypothesis. The significant negative correlation between pH and dissolved Pb (r= -0.7763; p≤0.01) supports the view of the regulatory effect of pH on the dissolved Pb level in the aquatic systems of East Kolkata Wetland.

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