OPERATION OF A SOLIDS CONTACT TANK AT LOW DISSOLVED OXYGEN AND LOW TOTAL SUSPENDED SOLIDS CONCENTRATIONS

2007 ◽  
Vol 2007 (14) ◽  
pp. 4302-4309 ◽  
Author(s):  
Mark Moise ◽  
Alex Ekster
Keyword(s):  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Low Dissolved Oxygen

scholarly journals Limnology of Merbok estuary, Kedah, Malaysia

2015 ◽  
Vol 41 (1) ◽  
pp. 13-19
Author(s):  
Kaniz Fatema ◽  
Wan Maznah Wan Omar ◽  
Mansor Mat Isa
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Quality Parameters ◽  
The Other ◽  
Wet Season ◽  
Hand Temperature ◽  
Do Concentration ◽  
Merbok Estuary

Water quality in three different stations of Merbok estuary was investigated limnologically from October, 2010 to September, 2011. Water temperature, transparency and total suspended solids (TSS) varied from 27.45 - 30.450C, 7.5 - 120 cm and 10 -140 mg/l, respectively. Dissolved Oxygen (DO) concentration ranged from 1.22-10.8 mg/l, while salinity ranged from 3.5-35.00 ppt. pH and conductivity ranged from 6.35 - 8.25 and 40 - 380 ?S/cm, respectively. Kruskal Wallis H test shows that water quality parameters were significantly different among the sampling months and stations (p<0.05). This study revealed that DO, salinity, conductivity and transparency were higher in wet season and TSS was higher in dry season. On the other hand, temperature and pH did not follow any seasonal trends.Bangladesh J. Zool. 41(1): 13-19, 2013

Municipal wastewater characteristics at Irtah pumping station in the Tulkarem city

2000 ◽  
Vol 42 (1-2) ◽  
pp. 337-340 ◽  
Author(s):  
H.Q. Shaheen
Keyword(s):  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Total Suspended Solids ◽  
Ammonia Nitrogen ◽  
Total Kjeldahl Nitrogen ◽  
Pumping Station ◽  
Kjeldahl Nitrogen ◽  
Sodium And Potassium ◽  
Mixed Samples

Wastewater flow samples were collected at 2-hour intervals for one week during the month of October 1998 at the Irtah wastewater pumping station in the Tulkarem city. The station collects about 32% of the wastewater of the Tulkarem city and 25% of the Tulkarem camp. The samples were mixed on 24-hour basis and tested for the pollution parameters BOD5, COD, total suspended solids, orthophosphate, total Kjeldahl nitrogen, ammonia nitrogen, nitrate, calcium, sodium and potassium. At the 2-hour intervals the wastewater flow was tested for conductivity, temperature, pH, and dissolved oxygen. The variation of the strength of these parameters and its relation to the flow values are observed and evaluated. The produced organic strength versus the flow and the 24-hour mixed samples are presented and commented upon.

scholarly journals The Evaluation of Dissolved Oxygen (DO), Total Suspended Solids (TSS) and Suspended Sediment Concentration (SSC) in Terengganu River, Malaysia

2018 ◽  
Vol 7 (3.14) ◽  
pp. 44
Author(s):  
Noorjima Abd Wahab ◽  
Mohd Khairul Amri Kamarudin ◽  
Mohd Ekhwan Toriman ◽  
Frankie Marcus Ata ◽  
Hafizan Juahir ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Dissolved Oxygen ◽  
Suspended Sediment ◽  
River Basin ◽  
Suspended Solids ◽  
Suspended Sediment Concentration ◽  
Total Suspended Solids ◽  
Sediment Concentration ◽  
Quality Parameters

Terengganu River Basin is situated in the north eastern coastal region of Peninsular Malaysia. 29 sampling stations were selected. The water quality parameters were measured such as Dissolved Oxygen (DO), Total Suspended Solids (TSS) and Suspended Sediment Concentration (SSC). Results showed that the range of DO (2.11 mg/L – 8.07 mg/L), TSS (0.4 mg/L – 128.2 mg/L) and SSC (0.07 mg/L – 25.6 mg/L). The distribution of land use and land cover activities effected to the level of water quality in watersheds. The analyses of variance (ANOVA) was applied and provide a better understanding for the complex relationships among water quality parameters. Graphical data helps a better view of the overall analysis to appoint sources of pollutants to their effect. Terengganu River Basin is a shallow and has a sensitive ecosystem that responds to the land use changes and development activities of its surroundings. Water quality analysis showed that TSS and SSC were higher in the dry season but DO were higher in the wet season. Overall, the water in the Terengganu River Basin classified slightly contaminated especially the main sources of pollutants were possibly waste products and waste from development activities such as sand mining, farming, residential and agricultural.  

scholarly journals Monsoonal plankton distribution and physico-chemical water qualities in a rain-fed lake in Noakhali, Bangladesh

2020 ◽  
Vol 32 (1) ◽  
pp. 179-184
Author(s):  
NAJMUS SAKIB KHAN ◽  
MD SAIFUL ISLAM ◽  
JABER BIN ABDUL BARI ◽  
MD MOSTOFA KAMAL
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Science And Technology ◽  
Total Suspended Solids ◽  
Zero Point ◽  
Physico Chemical ◽  
Plankton Distribution ◽  
Chemical Water

The study focused on the monsoonal distribution of plankton in a rain fed partial lake inSonapur, Noakhali district, Bangladesh. Three sampling sites were chosen between Sonapur zero point andNoakhali Science and Technology University. Four groups of phytoplankton such as Chlorophyceae (11genera), Bacillariophyceae (6 genera), Cyanophyceae (6 genera) and Euglenophyceae (3 genera) andfour groups of zooplankton such as Rotifera (10 genera), Cladocera (3 genera), Copepode (2 genera) andCrustacea (2 genera) were identified. The lake was found to be organic polluted (Palmer’s algal pollutionindex value: 22.33). The average wet land zooplankton index (WZI) value of this lake was estimated 3.72means moderate water quality. During the sampling periods some important physico-chemical parameterslike temperature (29-30 ?C), pH (7.8-8.2), transparency (6.5-13.50 cm), free CO2 (8.00-12.00 mg/l), totalalkalinity (13.00-14.50 mg/l), ammonia (0.1-0.5 mg/l), nitrate (0.05-0.25 mg/l), nitrite (0.03-0.07),phosphate (0.1-0.9 mg/l), dissolved oxygen (2-3.5 mg/l) and total suspended solids (4.0×10-4-5.3×10-4mg/l) were also determined as supporting water quality statement.

scholarly journals Treatment of shrimp effluent by sedimentation and oyster filtration using Crassostrea gigas and C. rhizophorae

2009 ◽  
Vol 52 (3) ◽  
pp. 775-783 ◽  
Author(s):  
Roberto Ramos ◽  
Luis Vinatea ◽  
Walter Seiffert ◽  
Elpídio Beltrame ◽  
Júlia Santos Silva ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Chlorophyll A ◽  
Crassostrea Gigas ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Control Treatment ◽  
Total Volatile ◽  
Shrimp Culture ◽  
Volatile Solids ◽  
Significant Difference

Efficiency in removing particulate matter from Litopenaeus vannamei shrimp culture effluent was assessed in laboratory scale employing sedimentation and oysters Crassostrea gigas and C. rhizophorae filtration processes. Cylindroconical tanks (100 L) were used in duplicate for sedimentation and 50-L in triplicate for oyster filtration. Fifteen oysters of each species weighing 76-80 g were stocked in each of the filtration treatment experimental units (biomass of 1065 - 1174 g oyster per unit). The control treatment was a tank similar to those used in the filtration treatment but with empty oyster shells. Hydraulic retention time of the effluent was of 6 hours in each treatment. First, effluent went through sedimentation, and then the supernatant went through the filtration tanks. Temperature, pH, dissolved oxygen, salinity, turbidity, total suspended solids, total volatile solids, chlorophyll a and BOD5 were evaluated. During sedimentation and filtration, temperature, pH, salinity and dissolved oxygen concentration remained stable. Sedimentation removed 18, 5.6, 27.5, 45.40 and 23.2% of turbidity, total suspended solids, total volatile solids, chlorophyll a and BOD5, respectively. Chlorophyll a and BOD5 after sedimentation presented significant difference (P<0.05) from the farm crude effluent. For the filtration treatment, C. rhizophorae was more efficient removing 62.1, 70.6, 36.1, 100 and 17.2% of turbidity, total suspended solids, total volatile solids, chlorophyll a and BOD5, respectively, whereas C. gigas removed 56.3, 41.2, 27.8, 51.4 and 8.0% of the same parameters. Statistically comparing C. rhizophorae and C. gigas performances, there were differences (P<0.05) in removing total suspended solids, total volatile solids and chlorophyll a.

scholarly journals The Limnological Effects of River Lesser-Zab on Tigris River, Iraq

2007 ◽  
Vol 4 (3) ◽  
pp. 452-457
Author(s):  
Baghdad Science Journal
Keyword(s):  
Dissolved Oxygen ◽  
Water Samples ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Spring Season ◽  
Chemical Parameters ◽  
High Discharge ◽  
Tigris River ◽  
Discharge Water ◽  
Physico Chemical

The present study included the physico-chemical parameters of Lesser-Zab river and its effects on Tigris river. Monthly water samples were taken from the two rivers during January to October 1999.There were no signifcant difference in water temperatures. Both rivers were fresh to oligohalin, alkaline and very hard. Close values were determined in total suspended solids in both rivers with little increasing during rainfall period and high discharge. Water was well areated and over saturation was recorded in several occasions. Dissolved oxygen values of Tigris river were influenced by Lesser-Zab. Cations were more dominant than anions in both rivers. In Lesser-Zab, the anions were increased during spring season and declined in summer which their values influenced in Tigris river. The concentration of plant nutrients (NO2,NO3,PO4 and SiO2) were fluctuated during the study period in Lesser-Zab and their effects were cleared on Tigris river.N:P ratio values were indicated the deficiency of nitrogen in both rivers.

scholarly journals Environmental Study of Some Water Characteristics at Um-Al-Naaj Marsh, South of Iraq.

2011 ◽  
Vol 8 (1) ◽  
pp. 531-538
Author(s):  
Baghdad Science Journal
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
Seasonal Changes ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Environmental Study ◽  
Light Penetration ◽  
Negative Effects ◽  
Water Characteristics ◽  
Water Ph

Um-Al-Naaj region in Al-Hawiezah Marsh, Southern Iraq was chosen to study the environmental variations of some water characteristics during 2008, seasonally. The results showed clear seasonal changes in values of some environmental variables (temperature, depth, light penetration, turbidity, total suspended solids, pH, dissolved oxygen, reactive phosphate, reactive nitrite, and reactive nitrate), while there were no clear seasonal changes in electrical conductivity and salinity values. In addition, high nutrients concentrations and light penetration were noted. Statistical analysis showed significant positive relationship between air and water temperature; electrical conductivity and salinity. Water turbidity was significantly affected by total suspended solids. On the other hand, some of the studied variables had significant negative effects (relative relationships) to each other, when water pH and dissolved oxygen were affected by temperature; total suspended solids and turbidity affected also light penetration.

scholarly journals First report: Amazon River Prawn reared in biofloc technology

2020 ◽  
Vol 19 (3) ◽  
pp. 377-380
Author(s):  
Adolfo Jatobá ◽  
Esmeralda Chamorro Legarda ◽  
Larissa Stockhausen ◽  
Felipe do Nascimento Vieira
Keyword(s):  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Total Suspended Solids ◽  
Ammonia Nitrogen ◽  
Nutritional Requirements ◽  
Amazon River ◽  
Feed Conversion ◽  
Biofloc Technology ◽  
Macrobrachium Amazonicum ◽  
Management Techniques

The objective of this work was to evaluate the use of biofloc technology to reared Amazon River prawn (Macrobrachium amazonicum). One hundred Amazon River prawn juveniles were divided into two experimental units (250 L), 50 animals per each. Prawns were fed two times per day, with 3% of the prawn biomass.  Dissolved oxygen and temperature were performed twice a day. Total suspended solids, pH, alkalinity, ammonia nitrogen, nitrite and nitrate were monitored twice a week. Prawns showed 77.67%, survival, 2.98 feed conversion, weekly weight gain of 0.29 g day-1, and yield of 822.0 g m-3 after six weeks of rearing. Dissolved oxygen, temperature and pH were suitable for the species, however, for some weeks, ammonia nitrogen and nitrite were higher than the limits recommended for prawn. In conclusion it is possible to use BFT to maintain and rearing Amazon River Prawn (M. amazonicum), however to improve the performance it is necessary to define nutritional requirements, as well improve the management techniques for this species in BFT.

scholarly journals Investigation of full-scale step-fed SBR under low dissolved oxygen: performance and microbial community response

2016 ◽  
Vol 51 (2) ◽  
pp. 141-152
Author(s):  
Heloísa Fernandes ◽  
Regina Vasconcellos Antonio ◽  
Rejane Helena Ribeiro da Costa
Keyword(s):  
Microbial Community ◽  
Dissolved Oxygen ◽  
Chemical Oxygen Demand ◽  
Suspended Solids ◽  
Oxygen Demand ◽  
Community Response ◽  
Full Scale ◽  
Low Dissolved Oxygen ◽  
Do Concentration ◽  
Low Do

A decentralized full-scale sequencing batch reactor (SBR) system for treating wastewater was operated to assess their feasibility and the response of bacterial population dynamic and nutrient removal performance. The reactor was operated under low dissolved oxygen (DO) concentration (0.3–0.7 mgL−1) and an average applied organic load of 0.5 g COD L−1 d−1 (COD: chemical oxygen demand). Removal efficiencies were higher than 70% for both soluble chemical oxygen demand and ammonium, with average effluent concentration of 51 ± 15 mg COD L−1 and 16.0 mg NH4+ L−1. The mixed liquor volatile suspended solids/total suspended solids ratio was 0.9, and the average food/microorganism ratio was 0.3 g COD g VSS−1 d−1 (VSS: volatile suspended solids). The active biomass was composed of 94.9% heterotrophic and 5.1% autotrophic organisms. The most frequently identified were chemoorganoheterotrophic organisms affiliated with Bacteroidetes and Firmicutes, some of them with the capacity to denitrify and grow under low DO concentration. Temperature and sludge withdrawal were important factors in determining nitrification and phosphorus removal rates. The SBR was viable for domestic wastewater treatment and showed that the microbial community greatly influenced its performance. This work can also provide valuable insights into further applications in systems operated under low DO condition.

scholarly journals Kualitas Air Media Pemeliharaan Benih Udang Windu (Penaeus monodon Fabricius) dengan Sistem Budidaya yang Berbeda

2016 ◽  
Vol 19 (2) ◽  
pp. 171
Author(s):  
Ali Djunaedi ◽  
Heri Susilo ◽  
Sunaryo Sunaryo
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Suspended Solids ◽  
Penaeus Monodon ◽  
Total Suspended Solids ◽  
Average Concentration ◽  
Tiger Shrimp ◽  
Recirculation System ◽  
Improve Water Quality ◽  
Seed Medium

 Medium rearing of the P. monodon Fabricius seed at the hatcheries usually used closed system and without water changes during culture period, until certain time the water quality could deterioted. The purpose of this research was to understand the effects of recirculation system on the water qualities (total suspended solids, ammonia, ammonium, nitrite and dissolved oxygen) of tiger shrimp (P. monodon Fabricius) seed medium. This research was conducted in the hatchery of Marine Science of Diponegoro University at Teluk Awur. The research used experimental method with two treatments, recirculation and non-recirculation system. Concentrations of total suspended solids (TSS), ammonia, nitrite and dissolved oxygen (DO) were descriptive analyzed. Average concentration on recirculation system of  TSS was 0,570 mg/L, ammonia was 0,039 mg/L, nitrite was 0,076 mg/L and DO was 6,00 mg/L. Average concentration on without recirculation system of TSS was 0,983 mg/L, ammonia was 0,09 mg/L, nitrite was 0,2 mg/L and DO was 3,86 mg/L. The resirculation rearing system was improve water quality on tiger shrimp seed medium. Keywords : Water Quality, Recirculation System, Tiger Shrimp (P. monodon Fabricius) Budidaya benih udang windu (P.  monodon  Fabricius) pada bak pembenihan umumnya menggunakan sistem tertutup dan air media tidak diganti, sehingga dalam waktu tertentu dapat terjadi penurunan kualitas air. Penelitian ini bertujuan untuk mengetahui perubahan kualitas air (MPT, amonia, amonium, nitrit dan DO) pada pemeliharaan benih udang windu (P.  monodon  Fabricius) dengan sistem resirkulasi dan tanpa resirkulasi. Penelitian dilakukan di Marine Center, Jurusan Ilmu Kelautan, Teluk Awur, Jepara. Metode penelitian yang digunakan adalah eksperimental dengan dua perlakuan yaitu penggunaan sistem resirkulasi dan tanpa resirkulasi. Data konsentrasi material padatan tersuspensi (MPT), amonia, nitrit, oksigen terlarut (DO), pH dan suhu selama penelitian dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa pada sistem resirkulasi konsentrasi rata – rata MPT 0,570 mg/L, amonia 0,039 mg/L, nitrit 0,076 mg/L dan DO 6,00 mg/L, sedangkan pada bak tanpa sistem resirkulasi konsentrasi rata – rata MPT 0,983 mg/L, amonia 0,09 mg/L, nitrit 0,2 mg/L dan DO 3,86 mg/L. Sistem resirkulasi mampu memperbaiki kualitas air media pemeliharaan benih udang windu. Kata kunci:   Kualitas Air, Sistem Resirkulasi, Udang Windu (Pennaeus monodon Fabricius). 

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