Fundamental Research on Effect of Sewage Treatment Process on Biological Impacts against Aquatic Organisms by Sewage Water

The present research deals with the study of physico-chemical and bacteriological characteristics of sewage water collected from three different sites of Coimbatore during two consecutive seasons. Seasonal variations indicated that the most of the nutrients (viz., total N, phosphates) and salts (nitrates, chlorides and sulphates) are present abundantly at pre-monsoon and the physical characters like TSS (600 mg/L) are more at post-monsoon. Multiple comparisons made using analysis of variance showed that the Ukkadam sampling point varies significantly from other two points. The total coliform count for the Ukkadam samples were >2400 (MPN/100ml) in raw sewage. This study concludes that the physicochemical characters and microbiological characters are outrageous in the raw sewage and upon the treatment the undesirable characters are reduced. Studies on the sewage characteristics of treatment plants are crucial to know the pollutant levels upon the various time scales and the treatment status which is necessary to improve the state of the art of the treatment process.

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Mercury speciation transformation in sewage of the sewage treatment process

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/770/1/012069 ◽

2021 ◽

Vol 770 (1) ◽

pp. 012069

Author(s):

Yunpeng Li ◽

Yan Wang ◽

Ruhai Liu ◽

Long Shao ◽

Xiaoyu Liu ◽

...

Keyword(s):

Treatment Process ◽

Sewage Treatment ◽

Mercury Speciation

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Occurrence and elimination of antibiotics at four sewage treatment plants in Japan and their effects on bacterial ammonia oxidation

Water Science & Technology ◽

10.2166/wst.2009.067 ◽

2009 ◽

Vol 59 (4) ◽

pp. 779-786 ◽

Cited By ~ 67

Author(s):

Gopal Chandra Ghosh ◽

Takashi Okuda ◽

Naoyuki Yamashita ◽

Hiroaki Tanaka

Keyword(s):

Oxygen Uptake ◽

Nalidixic Acid ◽

Removal Efficiency ◽

Treatment Process ◽

Ammonia Oxidation ◽

Oxygen Uptake Rate ◽

Sewage Treatment ◽

Secondary Treatment ◽

Mixed Condition ◽

Sewage Treatment Plants

The occurrence and elimination of seventeen antibiotics (three macrolides: azithromycin, clarithromycin and roxithromycin; five quinolones: ciprofloxacin, enrofloxacin, levofloxacin, nalidixic acid and norfloxacin; five sulfonamides: sulfadimethoxine, sulfadimizine, sulfamerazine, sulfamethoxazole and sulfamonomethoxine; and others: tetracycline, lincomycin, salinomycin and trimethoprim) were investigated at four full-scale sewage treatment plants in Japan. The highest concentration was recorded for clarithromycin (1,129 to 4,820 ng/L) in influent, followed by azithromycin (160 to 1,347 ng/L), levofloxacin (255 to 587 ng/L) and norfloxacin (155 to 486 ng/L). A vary inconsistence picture was obtained with negative to over 90% removal. Nalidixic acid (53 to100%) exhibited higher removal efficiency followed by norfloxacin (75 to 95%), levofloxacin (40 to 90%), ciprofloxacin (60 to 83%) and enrofloxacin (38 to 74%). Among macrolides, clarithromycin (50 to 88%) and azithromycin (34 to 86%) showed relatively higher removal efficiency than roxithromycin (−32 to 59%). For most of the antibiotics removal efficiency was higher in A2O and AO based secondary treatment process than CAS process. The effect of the antibiotics on bacterial ammonia oxidation determined by oxygen uptake rate presented that there was no significant effect below 0.05 mg/L of each antibiotics. Even at the same concentration, antibiotics in mixed condition had higher inhibition effects than individuals.

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Anaerobic-Aerobic Combined Process for the Treatment of Sewage with Nutrient Removal: The Ananox® Process

Water Science & Technology ◽

10.2166/wst.1992.0170 ◽

1992 ◽

Vol 25 (7) ◽

pp. 383-394 ◽

Cited By ~ 28

Author(s):

G. Garuti ◽

M. Dohanyos ◽

A. Tilche

Keyword(s):

Organic Matter ◽

Nutrient Removal ◽

Treatment Process ◽

Waste Water Treatment ◽

Sewage Treatment ◽

Warm Season ◽

Combined Process ◽

Water Treatment Process ◽

A Value ◽

N Removal

Results of a three year experience on a combined anaerobic-anoxic-oxic municipal waste water treatment process - named ANANOX® - are presented. This process demonstrated to be highly efficient, with 89.6% CODt, 89.2% TSS and 81.2% N removal, and a sludge production of only 0.2 kg TSS.kg COD removed−1, a value which is roughly 50% less if compared with traditional nitrification/denitrification processes. Sulphates play a very significant role in the process because, after being reduced in the anaerobic step, where they give a contribution to the organic matter degradation, they are reoxidized in the anoxic step by nitrates, reducing the organic matter need for denitrification. Due to the high dependence of efficiency on temperature, the system proposed has advantageous uses for sewage treatment, particularly in warm climates and in tourist and recreational areas where the population increases during the warm season.

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Biosolids conditioning and the availability of Cu and Zn for rice

Scientia Agricola ◽

10.1590/s0103-90162003000100024 ◽

2003 ◽

Vol 60 (1) ◽

pp. 161-166 ◽

Cited By ~ 11

Author(s):

Adriana Marlene Moreno Pires ◽

Maria Emília Mattiazzo

Keyword(s):

Treatment Process ◽

Oryza Sativa L ◽

Sewage Treatment ◽

Statistical Design ◽

Test Plant ◽

Before And After ◽

Year 2000 ◽

Zn Availability ◽

Cu And Zn ◽

Metal Phytoavailability

Sewage treatment process is a factor to be considered for biosolid use in agriculture. The greatest sewage treatment facility of São Paulo State (Barueri/SP) altered in the year 2000 of its sludge treatment. The addition of ferric chloride and calcium oxide was substituted by the addition of polymers. This change can modify heavy metal phytoavailability. A green house experiment, using 2 soils treated with biosolids (three with and one without polymers with and without polymers) was performed to evaluate Cu and Zn phytoavailability using rice (Oryza sativa L.) as test plant. Three kilograms of two soils (Haphorthox abd Hapludox) were placed in pots and the equivalent to 50 Mg ha-1 (dry basis) of biosolid was added and incorporated. The statistical design adopted was completely randomized experiment, with five treatments (control plus four different biossolids) each soil and four replications. Soil pH before and after harvesting, Cu and Zn concentrations in shoot were evaluated. Tukey (5%) was used to compare the results. DTPA, HCl 0.1 mol L-1 and Mehlich 3 were used to estimate soil available Cu and Zn. Amounts extracted were correlated to those presented in rice shoot, to evaluate the efficiency of predicting Cu and Zn phytoavailabilities. Biosolids with polymers presented higher Cu and Zn phytoavailabilities, possibly due to the lower pH of these residues. In this case soil presented lowest values of pH and plant shoot had highest. All extractants were representative of Cu and Zn availability to rice plants.

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Unravelling diversity and metabolic potential of microbial consortia at each stage of leather sewage treatment

RSC Advances ◽

10.1039/c7ra07470k ◽

2017 ◽

Vol 7 (66) ◽

pp. 41727-41737 ◽

Cited By ~ 5

Author(s):

Hebin Liang ◽

Dongdong Ye ◽

Lixin Luo

Keyword(s):

Wastewater Treatment ◽

Activated Sludge ◽

Treatment Process ◽

Sewage Treatment ◽

Microbial Consortia ◽

Biological Wastewater Treatment ◽

Metabolic Potential ◽

Ecological Functions ◽

Wastewater Treatment Process ◽

System P

Activated sludge is essential for the biological wastewater treatment process and the identification of active microbes enlarges awareness of their ecological functions in this system.

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The Recycling of Sewage Generated in Kormangla-Chellaghatta Valley of Bengaluru India

Advance in Environmental Waste Management & Recycling ◽

10.33140/aewmr.03.02.07 ◽

2020 ◽

Vol 3 (2) ◽

Keyword(s):

Ground Water ◽

Sewage Treatment ◽

Water Shortage ◽

Sewage Water ◽

Water Drainage ◽

Treated Water ◽

Ground Water Recharge ◽

Water Recharge ◽

Agriculture Products ◽

The City

The water consumption in Bengaluru goes to 1853 Million Liter per Day (MLD) mainly sourced from Kaveri river and borewells and in result to produce abbot 1400 MLD of sewage. About 711 MLD is being treated water out come from 26 Secondary Treatment Plants (STP) against their capacity of 1360 MLD. About 462.9 MLD is recycled for various purposes and remaining 248.5MLD is allowed to flow in Sewage Water Drainage or in lakes allowed to mix with the sewage, making practically no use. The Bangalore Water Supply and Sewerage Board (BWSSB) has about 6 STPs in place for a capacity of 453.5 MLD in the Kormangla-Chelghatta valley (K&C Valley) catchment area. One of the best-known sewage recycling in present day in the country is 440 MLD Kormangla-Chelghatta valley project for drought prone Kolar and Chickballapur districts in Karnataka, India to reuse of treated water for ground water recharge and industries and then to agriculture. About 76 tanks have been filled till this date. From these tanks, treated water is allowed to recharge the ground water and then reused through open wells/ borewells for agriculture/ horticulture. No treated water is directly used from such tanks. The project has facilitated to change the socioeconomic status of the farmers, terrestrial, aquatic and marshy ecosystems of the area. The project is bringing change in symbiotic relations by exerting pressure for more sewage treatment at Bengaluru and in turn vegetables/agriculture products supply to it. It also fulfils the obligation of City to provide nutrient rich treated waste-water for farmers’ irrigation needs under distress conditions that they are facing due to drought and water shortage, who grow food and vegetables and thus ensuring symbiotic livelihood security for the farmers and food security for the city. The author is working as expert member appointed by National Green Tribunal for the rejuvenation of lakes in K&C Valley.

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