Total Suspended Research Articles

Analysis of water condition based on suspended sediment distribution and phytoplankton abundance in Lasolo Bay, Southeast Sulawesi Province

Lasolo Bay is a part of water in North Konawe Regency that connects the Lasolo River and sea waters. Several activities from Nickel mining activities that have been carried out around the bay have caused the physical condition of Lasolo Bay to change, namely an increase in turbidity and Total Suspended Solids (TSS) in marine waters. TSS and phytoplankton are among the indicators for determining the level of productivity of water. The purpose of this study was to determine the effect of TSS, nitrate and phosphate on phytoplankton abundance as an indicator of the level of aquatic productivity. The study was conducted in August 2021. Determination of sampling location based on purposive sampling method at 9 stations based on three layers of light penetration depth of 100%, 50% and 25% of surface light intensity. TSS analysis using gravimetric methods and phytoplankton abundance analysis using the Sedgwick Rafter Counting Chamber tool at the Biological Laboratory of FMIPA University of Halu Oleo. The results showed that TSS concentrations ranged from 160–390 mg/l and phytoplankton abundances at each station ranged from 1208–3040 cells/l. Increased TSS concentrations affect phytoplankton abundance. In general, high TSS values were at stations close to the mouth of the Lasolo river and high phytoplankton abundances were in the central part of Lasolo Bay. The abundance of phytoplankton in the waters of Lasolo Bay falls into the moderate category.

Spatio-temporal structures of satellite-derived water quality indicators along the Korean South Coast

The structure of 9-year time series data for Sea Surface Temperature (SST), Chlorophyll a (Chl-a) and Total Suspended Solids (TSS), derived from the Visible Infrared Imaging Radiometer Suite (VIIRS), was examined in this study. Authors found that there exists strong seasonality among the three variables with spatial heterogeneity along the Korean South Coast (KSC). In specific, SST was in phase with Chl-a, but out of phase with TSS by six months. A strong inversed spectral power with six-month phase-lag was found between Chl-a and TSS. This could be attributed to different dynamics and environmental settings. For example, Chl-a concentration seemed to have strong positive correlation with SST indicating typical seasonality of marine biogeochemical processes such as primary production; while a strong negative correlation between TSS and SST might have been influenced by changes in physical oceanographic processes, such as stratification and monsoonal wind-driven vertical mixing. In addition, the strong east–west heterogeneity of Chl-a suggests that the marine coastal environments are predominantly governed by distinct local hydrological conditions and human activities associated with land cover and land use, while the east–west spatial pattern revealed in TSS timeseries was associated with the gradient of tidal forcings and topographical changes keeping tidally induced resuspension low eastward.

KORELASI KEMACETAN LALU LINTAS DENGAN EMISI KENDARAAN PADA RUAS JALAN CILEUNGSI – CIBEET JAWA BARAT

The Cileungsi – Cibeet road section is one of the provincial road sections that is passed by quite dense vehicles, is passed by sand and stone quarrying, and is close to a cement factory. Based on health data, several districts around this road segment are affected by respiratory diseases. The research objective was to examine the correlation between traffic jams and air pollution levels, to find the causes of air pollution. The results of the study, the Cileungsi - Cibeet road section has an uneven degree of traffic saturation (DS). Degree of Traffic Saturation at the start of the segment (Sta. 0+000) with a value of 1.06, poor service conditions, vehicles running slowly and tend to get stuck and walk on the shoulder of the road. At Sta. 6+700 (Cibarusah junction), poor service conditions, vehicles running with lots of obstacles. Gradually approaching the end of the segment (Cibeet) the level of road service is getting better with a value of 0.68. Air pollution caused by motorized vehicles consists of CO, Pb, and TSP gases. The highest carbon monoxide (CO) gas is at Sta. 0+000 which is 4,938 μg/Nm³ but still below the quality standard. This is the same as White Lead (Pb), which is also the highest at location 1 Sta. 0+000 which is 0.14 μg/Nm³ but still below the air quality standards. In contrast, the highest dust (TSP) is at location 3 (Sta 21+200), namely 342 μg/Nm³ which is above the air quality standards. The correlation between traffic jams and air pollution due to vehicle emissions from CO, Pb, and TSP gases has a different value. The correlation coefficient (r) between traffic density and CO is equal to 0.949, meaning that it has a very strong correlation. While the correlation coefficient (r) between traffic density and CO is equal to 0.874, it means that the correlation is very strong. Unlike the case with TSP gas (dust) has a correlation coefficient (r) - 0.120, giving a negative correlation. The results of this study indicate that on the Cileungsi - Cibeet road section the higher the level of road service, the greater the levels of Carbon Monoxide (CO) and Lead (Pb). As for dust (Total Suspend Particulate/TSP), an increase in the level of road service does not show an increase in dust levels.Keywords: Correlation, Degree Of Saturation, Traffic Congestion, Vehicle Emissions

Determination of Particulate Matters and Total Suspended Particles emitted from Incense Burning

Incense burning is an important ceremonial ritual in Buddhism. It is well recognized that incense smoke has negative health effects, which may be caused by the emission of submicron particles, including ultrafine and nanoparticles. Hence, in this study, the concentration of particulate matter (PM) and total suspended particles (TSP) emitted from incense burning were determined from 4 incense stick brands. The experiment was conducted in a room with a volume of approximately 146m3 using two instruments: an HV sampler and a Nano Sampler. The highest TSPs concentration from long sticks and short sticks were S1 (319.03 μg/m3) and N2 (439.75 μg/m3), respectively. High mass concentration was found in the ultrafine particle range for S2 (112.27 μg/m3) and N2 (117.30 μg/m3). In contrast, S1 and N1 exhibited high concentrations in the coarse particle mode at 79.28 μg/m3 and 86.75 μg/m3, respectively. Out of the 4 incense brands, N2 appeared to have the highest concentration in almost every particle range compared to the other 3 brands. Incense should be burned in a well-ventilated setting and try not to stay in the same place as the altar to reduce the risk of incense smoke exposure.

Monitoring Particulate Matters and Total Suspended Particles Along the Roadside and Public Area in Phnom Penh

This study aims to investigate the Total Suspended Particles (TSP) and Particulate Matter (PM) of the exposed area of vehicles emission along a boulevard (Russian Federation Boulevard/RFB) and public park (Wat Phnom Historical Park/WP) in Phnom Penh as a beneficial fact for passengers and tourists of air quality that they breathed in. This present study was carried out in 8 hours per sampling, twice a month, and 2 months long (March and April) of 2022 by using a high-volume sampler (HV, Shibata 500V) to determine TSP and Modified Nano-sampler (NS) to define PM (TSP/PM10/PM2.5/PM1/PM0.1). Conforming to the results, the highest percentage of relative humidity found during the sampling was when it rained (97.30%) and in the morning. Meanwhile, the lowest relative humidity was only about 48.70% which was during the hot afternoon. Additionally, TSP of RFB peak’s data was accounted as 234.04 μg/m3 which is beneath the standard of Royal Government of Cambodia (RGC), 330 μg/m3. Nevertheless, the climax concentration of fine and ultrafine particles (PM2.5 and PM0.1) that wandered in the same area had surprisingly stood in an immensely high number as 95.56 and 38.04 μg/m3. To summarize, low level of TSP in the ambient atmosphere is not correlating to less pollution since the acquired results of PM2.5 and PM0.1 had detected in a dominant level that disturb the public health respiratory system. Same thing happened to WP which is a tree-based site as well.

Destabilization of Emulsion Oil Separation by using Chemical Coagulation Process: Preliminary Investigation for Effective Analysis

Removal of pollutants produced by industrial plants requires reusing of water and access to the environment standard. The chemical coagulation process is a convectional method for wastewater treatment to reduce chemical oxygen demand and total suspend solids. The objective of this work is to study the effect of initial pH, coagulant type, and chemical dosage used on the separation performance at different initial oil concentrations. Based on the result, 800 mg/L of aluminum sulphate could remove up to 80% of 1g/L and 2g/L residual oil in wastewater, whereas residual 3g/L of that in wastewater with pH ranging from 7 to 8 could be removed up to 90%. In the instance of ferric chloride, the high removal efficiency of residual oil in wastewater could be achieved by utilizing a coagulant concentration ranging from 500 mg/L to 900 mg/L. Results show that, 700 mg/L of ferric chloride could remove up to 90% of residual oil in synthetic wastewater (1 g/L, 2 g/L, and 3 g/L). However, the aluminum sulphate could only remove 60–85 % of the total oil within the same dosage. In summary, further study on the possibility of ferric chloride in removing residual oil from wastewater could be considered.

Spatiotemporal Variability in Total Dissolved Solids and Total Suspended Solids along the Colorado River

The Colorado River is a principal source of water for 40 million people and farmlands in seven states in the western US and the Republic of Mexico. The river has been under intense pressure from the effects of climate change and anthropogenic activities associated with population growth leading to elevated total dissolved solid (TDS) and total suspended solid (TSS) concentrations. Elevated TDS- and TSS-related issues in the basin have a direct negative impact on the water usage and the ecological health of aquatic organisms. This study, therefore, analyzed the spatiotemporal variability in the TDS and TSS concentrations along the river. Results from our analysis show that TDS concentration was significantly higher in the Upper Colorado River Basin while the Lower Colorado River Basin shows a generally high level of TSSs. We found that the activities in these two basins are distinctive and may be a factor in these variations. Results from the Kruskal–Wallis significance test show there are statistically significant differences in TDSs and TSSs from month to month, season to season, and year to year. These significant variations are largely due to seasonal rises in consumptive use, agriculture practices, snowmelts runoffs, and evaporate rates exacerbated by increased temperature in the summer months. The findings from this study will aid in understanding the river’s water quality, detecting the sources and hotspots of pollutions to the river, and guiding legislative actions. The knowledge obtained forms a strong basis for management and conservation efforts and consequently helps to reduce the economic damage caused by these water quality parameters including the over USD 300 million associated with TDS damages.

Repas lama dam water quality and heavy metal contamination using Qual2k

Repas Lama Dam in Bentong Pahang has been experiencing pollution by Non-Point Sources (NPS) that can be found upstream of the Sungai Repas, the pollution being so evident that discoloration of the water is observable at the location. The area is littered with mines active and inactive, with many of the inactive mines being improperly shut down. When there are mining activities, some major waste or tailings are produced as the by-products of the process which drastically increases the amount of pollution that a water body that runs through these areas will contain. The Water Quality Parameters at a location, whether biological, chemical, or physical, can give a lot of insight into the level of pollution found in a water body. Through collecting these parameters and running them through a water quality model, it can give a lot of information on the present state of a river and help in attaining predictions of the health of a river. QUAL2K is the water quality model that was used to analyse the water at Old Repas Dam and further make predictions on the state of the river after 10 years. After the modelling process, the water quality parameters and the heavy metals present were analyzed using the Malaysian National Water Quality Standard (NWQS), which also assisted in classifying the water at Old Repas Dam based off individual parameters and its overall Water Quality Index score. The major water quality parameters that were used for this study are Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), Ammonia Nitrogen, pH and Total Suspended Solids (TSS). In terms of heavy metal analysis, the heavy metals that were looked at are Arsenic (As), Lead (Pb), Zinc (Zn), Copper (Cu), Tin (Sn) and Aluminium (Al). The data for these parameters being collected from studies that were conducted on the site in 2021 and information given by the Department of Statistics Malaysia.

Study of Total Dissolved Solids (TDS) and Total Suspended Solids (TSS) in Estuaries in Banten Bay Indonesia

The estuaries of Banten Bay have sandy sediment, and their main activity is fisheries. In order to maintain fishery productivity, good water quality is required. The sandy sediment in this location can affect water conditions at the point of the residue content. This study aims to reveal solids content in the estuaries of Banten Bay. A survey was conducted in four estuaries, namely Karangantu, Wadas, Cengkok, and Pamong. TDS were measured in situ in April and October 2021. TSS was analyzed in May, July, and October 2013, as well as in April and October 2021. Other physical and chemical parameters were analyzed in the laboratory or in situ. The results were compared with the standard for sea aquatic biota. Furthermore, the regression method was used to determine the correlation of TSS and TDS with other parameters. The physical and chemical parameters that affect TDS and TSS were analyzed using Principal Component Analysis (PCA). The results show that TSS correlated with Oxidative Reductive Potential (ORP) and turbidity. PCA showed that TSS correlated with TDS, nitrate, ammonium, ORP, water depth, and water current. Although TSS exceeded the threshold, sufficient dissolved oxygen and higher nutrient still maintained water quality for fisheries in four estuaries.

Green Biosynthesis of Zinc Oxide Nanoparticles Utilizing Pomegranate Peel Extract for Grey Water Treatment

The Aim of this Study is the Green Biosynthesis of Zinc Oxide Nanoparticles (ZnO NPS) Using Pomegranate Peel Extract Utilized from Fruit Waste. Zno Nps were Characterized by X-Ray Powder Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray (EDX), Fourier Transform Infrared (FT-IR) Spectrum and UV–Vis Spectrophotometry. Also, Evaluation of the Efficiency of the Prepared Zno Nps Using the Jar Test Procedure was Employed after the Determination of the Optimum Dose of Zno Nps for the Removal of Pollutants from the Grey Water. Different Doses of Zno Nanoparticles (0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 g/L) were Examined. the Results Obtained Confirmed that Zno Nps are Large Particles in Size Ranging from 54.2 to 86.4 Nm, Exist in a Pure and Crystalline Phase. the Results Obtained Showed that the Efficiency of Zno Nps for Pollutant Removal from Grey Water was Increased with the Increase of the Adsorbent Dose. the Best Removal Efficiency of Zno Nps was Obtained at a Dose of 400 Mg/L. the Removal Efficiency of Zno NPS was 98.16 %, 88.68%, 100%, 94.40%, 97.88%, 91.18%, 89.13%, 90.93%, and 90.37% for Ammonia (NH3+), Phosphorous (PO43-), Nitrate (NO3-), Oil & Grease, Total Nitrogen (TN), Turbidity, Chemical Oxygen Demand (COD), Biological Oxygen Demand (BOD5), and Total Suspended Solids (TSS) Removal, Respectively. the Cost Required for the Production of 100 g of Zno Nps was Calculated and Estimated to Be 42.37 Egyptian Pounds. in Conclusion Zno Nps Synthesized from Pomegranate Waste is a Sustainable, Eco-Friendly and Cost-Effective Approach with Potent Efficiency for Pollutants Removal from Grey Water.

Characterization of Nano-liter Sessile Droplets By Using An Active Microwave Resonance Probe.

In this work we present a microwave intracavity sensor for the characterization of aqueous solutions of nano-liter sessile droplets, deposited on the microstrip line electrode. The sensor operates at frequency and is based on tunable magnonic delay line oscillator. The samples were characterized by using their evaporation dynamics, by measuring their dielectric constants. The experiments have shown that the sensor is capable of detecting the salinity (S) of water with the required precision and resolution. The advantage of the sensor is the possibility of measuring the parameters such as S, Total Dissolved and Total Suspended Solids, simultaneously.

Analysis of River Water Quality Based on Pollution Index Water Quality Status, Lombok District, NTB

Leneng River is one of the rivers in Praya City, Central Lombok Regency, which receives domestic, agricultural, and household industrial waste. Various community activities along the banks of the Leneng River have affected river water quality. Some communities on the banks of the Leneng River, from upstream to downstream, still use river water for their daily needs. This study aims to 1) analyze the water quality of the Leneng River in terms of environmental parameters (Physical, chemical, and biological) and 2) Determine the level of pollution of the Leneng River water using the Pollution Index (IP) method. River water quality measurements were carried out at 3 (three) sample points. Parameters measured and observed were physical parameters, namely Total Solid Suspend (TSS); chemical parameters, namely pH, Total Phosphate (T.PO4), Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Dissolved Oxygen (DO), and biological parameters namely Total coliform and Fecal Coliform. This type of research is survey research with a quantitative descriptive approach. The results showed that the TSS value at sample point 1 (upstream) exceeded the required quality standard; the highest TSS concentration value was 54 mg/L, and the lowest at sample point 2 (middle section) was 2.50 mg/L. Value parameter concentration pH 7.7-8.7, T.PO4 value 0.05 mg/L-0.29 mg/L, BOD value 0.17-0.42 mg/L, COD concentration value 8 mg/L -9mg/L, and DO value of 6.07 mg/L-7.57 mg/L, this shows that the concentration for chemical parameters still meets the class I water quality standards according to PP 22 of 2021, while the total coliform parameter value and Facel coliform have exceeded class I water quality standards. The total coliform concentration value is 10,000 - 20,000 MPN/100 mL, and the Fecal coliform value is 600 MPN/100 mL – 2,500 MPN/100 mL, while based on the Pollution Index (IP) quality status water in the upstream with a value of 2.84, the middle part of 1.97, and the downstream part of 2.84, this shows a decrease in water quality from upstream to downstream of the river, with a level of pollution in the lightly polluted category.

Water Quality Analysis and Pollution Load Capacity of The Central of Food Production Zones in Merauke Regency

The Maro River and the Kumbe River are the downstream of the drainage system of Semangga District, Tanah Miring District, and Kurik District, the central point of food production in Merauke Regency. The water quality of these rivers is related to the quantity and quality of water from the drainage system, therefore agricultural activities and other local ceremonial determine the water flow in the drainage system. This study aimed to evaluate the water pollution index, the pollution loads, and the pollution load capacity of seven sites at the Maro and Kumbe Rivers. Based on Total Suspend Solid (TSS), Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) results which did not meet the quality standards, the water quality of these rivers displayed a degradation. The water quality status of these rivers from upstream to downstream is at low pollution level. The pollution load capacity of the Maro River is at site AS-2 (low tide level). Whereas the Kumbe River cannot accommodate pollution load capacity at both high and low tide levels anymore as the pollution load capacity of this river has exceed the quality standard limit in Regulation of Government of Republic of Indonesia No. 22 / 2021 for Class II.

Effects of Industrial Wastewater on Water Quality Tigris River at Baghdad Using (GIS) Technique

Tigris River has been affected by industrial wastewater pollution in Iraq. One water sampling point was taken for each of the five sites of industrial wastewater plants, which are located south of Baghdad along the length of the river about 9 Km within the study area from (33°15'52.63"N, 44°22'13.98"E) to (33°16'54.94"N, 44°27'15.86"E) navigated by GPS (GARMIN 72), coordinates system WGS_1984_UTM_Zone_38N. The Analysis of water quality Includes several parameters; WQI was used to assess the water quality of the river according to a mathematical equation. Five water quality parameters were considered, those are Hydrogen Ion Concentration (pH), Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Sulfate (SO4), Phosphate (PO4), and Total Suspended Solids (TSS) for the period (2020 to 2021). Water Quality Index (WQI) analysis technique according to an arithmetic weighted formula and using geographic information system (GIS) technique - Symbology method was used to display the results and analyzes as accurate and up-to-date colourful maps to describe water quality. Indicate the water sampling results were classified from poor to very poor for the period 2020 to 2021. The research aims, to use (GIS) to show that industrial wastewater runoff must be treated properly and completely before being discharged into the water stream.

WET SEASON CHLOROPHYLL a, b AND PHAEOPHYTIN a LEVELS IN THE WESTERN LAGOS LAGOON AND ITS CREEKS.

Algae are known to contain a wide array of pigments that absorb light for photosynthesis and which are useful in measuring primary production levels. In this study, the levels of these algal pigments (Chlorophyll a, b and phaeophytin a) in the Lagos lagoon and adjoining creeks were investigated in relation to water chemistry of the water bodies. Fifteen sampling stations including four of the creeks were investigated for the study. For the creeks, chlorophyll a ranged from 9.6 to 23.3?g/L, chlorophyll b, 0.4 1.1ug/L and phaeophytin a, 1.1 2.9?g/L. For the open lagoon areas chlorophyll a ranged between 8.9 and 11.8?g/L, chlorophyll b, between 0.6 and 1.1ug/L and phaeophytin a between 0.7 and 3.4?g/L. The Pearson correlation co efficient matrix among chlorophyll a, b and phaeophytin a were all positive (r = 0.28 0.35). The positive correlation among all the three algal pigments points to their direct relationship. Chlorophyll a was negatively correlated with salinity. The levels of algal pigments increased as Nitrate (nutrient) and Total Suspended Solids increased, however chlorophyll a was negatively correlated with salinity and was higher in the creeks than the lagoon. Salinity was a limiting factor to algal production in the Lagos lagoon (especially in the wet season) chiefly because most phytoplankton forms at this time were (freshwater forms). Chlorophyll b levels indicated the presence of green algae and euglenoids within the study area. Phaeophytin a also increased with increasing floodwater inputs reflected by its correlation with Nitrate and Total Suspended Solids or detrital materials (r = 0.44, 0.60). The measurement of phytopigment content could also be a useful tool in the establishment of eutrophic levels within within aquatic ecosystems in Nigeria, particularly the Lagos lagoon complex

Impacts of Covid-19 Lockdown on Concentration Levels of Traffic-Related Air Pollutants in Ibadan -a West African City

Trends and sources of air pollution at twenty-five traffic Intersections (TIs) before and during covid-19 lockdown were investigated in Ibadan, Nigeria. The relationships among climatic parameters, vehicular counts and ten air pollutants which includes particulate matter (PM1, PM2.5, PM10 & Total Suspended Particles-TSP) and gaseous pollutants (CO, NO2, SO2, NH3, total volatile organic compounds-TVOCs, and ground level O3) measured simultaneously at TIs were analysed. Results indicated significant decrease in mean concentrations of all pollutants studied except NO2 with 212% increase during the study period. Concentrations of gaseous pollutants CO, SO2, NH3, TVOCs and ground level O3 reduced by 7.92%, 24.80%, 1.58%, 44.08% and 4.28%, respectively while particulates concentrations of PM1, PM2.5, PM10 and TSP concentrations decreased by 49.64%, 60.79%, 81.21% and 84.17%, respectively during lockdown. An integrated source apportionment approach using Pearson’s correlation, Airflow backward trajectories arriving in the study area and Principal component analysis (PCA) identified vehicular emission as the primary source of studied air pollutants at TIs before and during lockdown in Ibadan. Emission from residences, roadside fuel combustion and local air transport of pollutants from nearby upwind areas with industries and farming activities were identified as secondary sources of air pollution affecting the study area.

A Machine Learning Algorithm for Himawari-8 Total Suspended Solids Retrievals in the Great Barrier Reef

Remote sensing of ocean colour has been fundamental to the synoptic-scale monitoring of marine water quality in the Great Barrier Reef (GBR). However, ocean colour sensors onboard low orbit satellites, such as the Sentinel-3 constellation, have insufficient revisit capability to fully resolve diurnal variability in highly dynamic coastal environments. To overcome this limitation, this work presents a physics-based coastal ocean colour algorithm for the Advanced Himawari Imager onboard the Himawari-8 geostationary satellite. Despite being designed for meteorological applications, Himawari-8 offers the opportunity to estimate ocean colour features every 10 min, in four broad visible and near-infrared spectral bands, and at 1 km2 spatial resolution. Coupled ocean–atmosphere radiative transfer simulations of the Himawari-8 bands were carried out for a realistic range of in-water and atmospheric optical properties of the GBR and for a wide range of solar and observation geometries. The simulated data were used to develop an inverse model based on artificial neural network techniques to estimate total suspended solids (TSS) concentrations directly from the Himawari-8 top-of-atmosphere spectral reflectance observations. The algorithm was validated with concurrent in situ data across the coastal GBR and its detection limits were assessed. TSS retrievals presented relative errors up to 75% and absolute errors of 2 mg L−1 within the validation range of 0.14 to 24 mg L−1, with a detection limit of 0.25 mg L−1. We discuss potential applications of Himawari-8 diurnal TSS products for improved monitoring and management of water quality in the GBR.

Microbiological aspects of the aeration tanks of an activated sludge treatment plant in dysfunction: Consequences on its treatment performance

The present study was conducted in a sewage treatment plant, called "El Kouwaer", located in the department of Mascara, North-West of Algeria. Mainly, the objective of this investigation is to evaluate the relevant settling and pollution parameters and to assess the proliferation level of filamentous microbial communities during the dysfunction period to further the effectiveness of the operative treatment. Sludge parameter values were estimated such us Settling Test, Diluted Sludge Volume Index (DSVI), and Total Suspended Solids (TSS) content to set up the sludge classification, the performance analysis of treatment was conducted by computing pollution indicators and removal efficiencies of organic pollution, as well as the Principal Component Analysis (PCA) of dysfunction parameters. The results showed that in aeration tanks 65% of samples represented a maximum Filament Index (FI) of 6. Diluted Sludge Volume Index (DSVI) was greater than 300 mg/L in 23% of samples. A high level of filamentous bacteria biodiversity was also noted during the assessment of the (FI) including Microthrix parvicella, Bogiotae, and Sphaerotilus natans. The effluent in the biological unit was characterized by BOD5/COD ratio of 0.17 and COD removal efficiency of 53.32%. Those results demonstrated that the sewage treatment plant is frequently affected by bulking problems. This study had confirmed the importance of continuous monitoring of different process parameters like Wastewater Biodegradability Index, Dissolved Oxygen, filamentous flora, and Dilute Sludge Volume Index (DSVI) to avoid irreversible damage at the level of a wastewater treatment plant.

Impact of flow pathway and source water connectivity on subsurface sediment and particulate phosphorus dynamics in tile-drained agroecosystems

Subsurface tile drainage is recognized as a significant source of sediment and particulate phosphorus (PP) in the midwestern U.S. However, the role of subsurface flow pathway and source water connectivity dynamics on sediment transport is poorly understood. The overarching objective of this study was to investigate sediment and PP loading dynamics for a midwestern subsurface tile drained agroecosystem and assess the governing flow pathway and water sources impacting subsurface sediment loads. In this study, we used a recently-developed framework that couples event-based hydrograph recession and specific conductance-end-member mixing analysis (SC-EMMA) to assess governing drivers of sediment transport through tile. We collected high-frequency specific conductance, turbidity, and subsurface discharge data from an edge-of-field (EOF) tile main located in northwestern Ohio for 15 months. Multiple linear regression (MLR) analysis and hysteresis analysis were employed to evaluate the impact of pathway-connectivity dynamics on flow-weighted mean Total Suspended Solids (TSS) concentrations. The MLR analysis showed that quickflow of new water (Qquick-new) had the highest flow-weighted mean sediment concentrations, and that concentrations associated with quickflow of old water (i.e., matrix-macropore exchange) were variable. Analysis using the hysteresis index (HI) showed that hysteresis characteristics (magnitude and direction) for separated hydrographs using the pathway-connectivity framework deviated from HI values of subsurface discharge (Qtile) and highlighted the importance of Qquick-new through much of the monitoring period. For events immediately following tillage and cover crop application in Fall 2019, we found Qquick-old was the primary form of preferential flow, peak sediment concentrations coincided with Qquick-old, and event sediment loadings during these events decreased relative to the previous fall. The findings suggest that reducing preferential transport of new water may be an effective strategy for reducing sediment and particulate P loadings at the edge-of-field.

Performance Upgrading Evaluation of the Anaerobic Baffled Reactor by Integrating Aerobic Media Filter for Municipal Wastewater Treatment

Background & Aims of the Study: Anaerobic baffled reactor (ABR) is one of the low-cost wastewater treatment systems; however, it has some limitations, such as insufficient standard nutrient outflow. Accordingly, it should be studied and developed. This research aims to determine the efficiency of a five-sectional reactor pilot and to upgrade it with an integrated aerated media filter in the reactor (integrated reactor) for municipal wastewater treatment. Materials and Methods: This study was performed on a laboratory scale with field conditions in the Khoy City wastewater treatment plant. The ABR reactor operated for 270 days with a hydraulic retention time (HRT) of 48, 36, 24, and 18 hours, respectively. The Integrated anaerobic baffled reactor (IABR) was operated for 35 days with 24 hours of HRT, i.e., aeration time of 5 hours. The reactors were fed in line from the inflowing wastewater to the treatment plant. A 24-hour combined sampling was performed 224 times from the inflow and outflow of the system, and volatile suspended solids, total kjeldahl nitrogen (TKN), total phosphorus (TP), biochemical oxygen demand (BOD), chemical oxygen demand (COD), and Total Suspended Solids (TSS) parameters were measured and compared with the effluent disposal standard. Results: The launch of ABR lasted 105 days, and its helpful operation lasted 200 days. In 18 to 48 hours, the reactor removed 79% to 91% of COD, 9% to 20% of TKN, 19% to 30% of phosphorus, and 89% to 94% of TSS. The IABR reached the effluent disposal standard in terms of TSS, BOD, COD, and phosphorus under 24 hours HRT, i.e., aeration time of 5 hours, and increased the COD removal efficiency by 6% compared to ABR under 24 hours HRT and the same conditions. Conclusion: By integrating the final aerobic media filter in ABR while reducing the required HRT by 50%, its efficiency in achieving the effluent disposal standards increased compared to ABR. Therefore, this system can be used to treat municipal wastewater.