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Wastewater delhi

Amit Kumar Singh, Nikunj Sharma, Humaira Farooqi, Malik Zainul Abdin, Thomas Mock, Shashi Kumar
Municipal wastewater (WW), if not properly remediated, poses a threat to the environment and human health by carrying significant loads of nutrients and pathogens. These contaminants pollute rivers, lakes and natural reservoirs where they cause eutrophication and pathogen-mediated diseases. However, the high nutrient content of WW makes it an ideal environment for remediation with microalgae that require high nutrient concentrations for growth and are not susceptible to toxins and pathogens. Given that an appropriate algal strain is used for remediation, the incurred biomass can be refined for the production of biofuel...
February 3, 2017: International Journal of Phytoremediation
L White, K L Hopkins, D Meunier, C L Perry, R Pike, P Wilkinson, R W Pickup, J Cheesbrough, N Woodford
BACKGROUND: Carbapenemase-producing Enterobacteriaceae (CPE) are an emerging infection control problem in hospitals worldwide. Identifying carriers may help reduce potential spread and infections. AIM: To assess whether testing hospital wastewater for CPE can supplement patient-based screening for infection prevention purposes in a hospital without a recognized endemic CPE problem. METHODS: Wastewater collected from hospital pipework on 16 occasions during February to March 2014 was screened for CPE using chromID(®) CARBA agar and chromID(®) CPS agar with a 10μg ertapenem disc and combination disc testing...
June 2016: Journal of Hospital Infection
Santosh K Deshmukh, Anil Kumar Singh, Siba Prasad Datta
Understanding and quantification of geochemical processes in vadose zone of sewage-effluent-irrigated soils are helpful in predicting the transference of metals and other ions to food chain and groundwater. Hence, an attempt has been made to simulate various geochemical processes occurring in the flow path of infiltrating sewage water down the vadose zone with the help of Net Geochemical Reaction Along the Flow Path (NETPATH). This study area was located in Western Delhi, India, where sewage effluents originating from Keshopur Sewage Treatment plant have been used for irrigation since 1979...
December 2015: Environmental Monitoring and Assessment
Santosh K Deshmukh, Anil Kumar Singh, Siba Prasad Datta
Agricultural lands in the peri-urban area of New Delhi have been irrigated with treated wastewater from the Keshopur Effluent Irrigation Scheme (KEIS) since 1979. An attempt has been made to study the influence of wastewater irrigation on pH, electrical conductivity, organic carbon, and dynamics of heavy metal concentrations in vadose zone under KEIS. For this study, agricultural lands which have been receiving the sewage irrigation for 20, 10, and 5 years were selected. Adjacent tube well water-irrigated fields were selected and used as reference...
November 2015: Environmental Monitoring and Assessment
Preeti Gupta, P Mathur, N Mathur, B Aarya
Hospitals are a release source of many chemical compounds in their wastewaters. In the present study Salmonella typhimurium strains TA 98, TA 100 and TA 102 were analyzed for their sensitivity to hospital waste waters. The results of the study showed that hospital waste waters consists of mutagens causing frame shift mutations and base pair substitutions and amongst the three strains used in this study, TA 102 was most effective which along with TA 98 can be used for quick assessment of genotoxicity of hospital waste waters prior to its discharge...
July 2014: Bulletin of Environmental Contamination and Toxicology
Pravin K Mutiyar, Atul K Mittal
Antibiotics consumption has increased worldwide, and their residues are frequently reported in aquatic environments. It is believed that antibiotics reach aquatic water bodies through sewage. Medicine consumed for healthcare practices are often released into sewage, and after sewage treatment plant, it reaches the receiving water bodies of lakes or rivers. In the present study, we determined the fate of some commonly used antibiotics in a sewage treatment plant (STP) located in Delhi and the environmental concentration of these antibiotics in the Yamuna River, which receives the sewage and industrial effluent of Delhi...
January 2014: Environmental Monitoring and Assessment
Niha Mohan Kulshreshtha, Rita Kumar, Zareena Begum, S Shivaji, Anil Kumar
A facultatively anaerobic, alkaliphilic, Gram-stain-positive, rod-shaped bacterium, designated strain 12/1(T), isolated from alkaline wastewater drained sludge of a beverage industry facility located near New Delhi, India, was subjected to a polyphasic taxonomic study. Phylogenetic analysis based on 16S rRNA gene sequence comparisons revealed that strain 12/1(T) belonged to the genus Exiguobacterium and was most closely related to Exiguobacterium aurantiacum DSM 6208(T) (99.46 %), E. aquaticum IMTB-3094(T) (99...
December 2013: International Journal of Systematic and Evolutionary Microbiology
D L Parmar, Ashok K Keshari
Simulation models are used to aid the decision makers about water pollution control and management in river systems. However, uncertainty of model parameters affects the model predictions and hence the pollution control decision. Therefore, it often is necessary to identify the model parameters that significantly affect the model output uncertainty prior to or as a supplement to model application to water pollution control and planning problems. In this study, sensitivity analysis, as a tool for uncertainty analysis was carried out to assess the sensitivity of water quality to (a) model parameters (b) pollution abatement measures such as wastewater treatment, waste discharge and flow augmentation from upstream reservoir...
March 2012: Environmental Monitoring and Assessment
Meena Sehgal, Ankur Garg, R Suresh, Priya Dagar
Concentration of heavy metals (Cd, Ni, Zn, Fe, Cu, Mn, Pb, Cr, Hg and As) in the waters of River Yamuna and in the soil of agricultural fields along its course in Delhi are reported from 13 sites, spread through the Delhi stretch of Yamuna, starting from the Wazirabad barrage till the Okhla barrage. Varying concentration of heavy metals was found. Peaks were observed in samples collected downstream of Wazirabad and Okhla barrage, indicating the anthropogenic nature of the contamination. The Wazirabad section of the river receives wastewater from Najafgarh and its supplementary drains, whereas the Shahdara drain releases its pollution load upstream of the Okhla barrage...
January 2012: Environmental Monitoring and Assessment
Timothy R Walsh, Janis Weeks, David M Livermore, Mark A Toleman
BACKGROUND: Not all patients infected with NDM-1-positive bacteria have a history of hospital admission in India, and extended-spectrum β-lactamases are known to be circulating in the Indian community. We therefore measured the prevalence of the NDM-1 gene in drinking water and seepage samples in New Delhi. METHODS: Swabs absorbing about 100 μL of seepage water (ie, water pools in streets or rivulets) and 15 mL samples of public tap water were collected from sites within a 12 km radius of central New Delhi, with each site photographed and documented...
May 2011: Lancet Infectious Diseases
Santosh K Deshmukh, Anil Kumar Singh, Siba Prasad Datta, K Annapurna
Impact of wastewater irrigation on some biological properties was studied in an area where treated sewage water is being supplied to the farmers since 1979 in the western part of National Capital Territory of New Delhi under Keshopur Effluent Irrigation Scheme. Three fields were selected which had been receiving irrigation through wastewater for last 20, 10 and 5 years. Two additional fields were selected in which the source of irrigation water was tubewell. The soil bacterial and fungal population density was studied in soil layers of 0-15, 15-30, 30-60 and 60-120 cm depths...
April 2011: Environmental Monitoring and Assessment
Ashish Bhatnagar, Monica Bhatnagar, Senthil Chinnasamy, K C Das
It is imperative to slash the cost of algal oil to less than $50 bbl(-1) for successful algal biofuel production. Use of municipal wastewater for algal cultivation could obviate the need for freshwater and the nutrients--N and P. It would also add CO2 through bacterial activity. Chlorella minutissima Fott et Nova dominated the entire phycoflora year around and through each stage of the wastewater treatment at the oxidation pond system of Wazirabad (Delhi) in India. The ability to grow so profusely in such varied and contrasting situations made this alga unique...
May 2010: Applied Biochemistry and Biotechnology
Rajiv Kumar, Dinesh Goyal
The percent removal and uptake of Pb2+ by algal-consortium (CP1) developed from wastewater of biological oxidation pond (Wazirabad, New Delhi, India) was studied under batch conditions with live biomass compared with continuous system using dried biomass immobilized on silica under laboratory conditions. In batch study, algal consortium (CP1) consisting of a mixed culture of Chlorella > Chlamydomonas > Lyngbya sp. was found to remove 17% of Pb2+ after 15 days of incubation from culture media containing 10 mg/L Pb2+, which decreased by increasing metal concentration from 20-50 mg/L...
August 2009: Indian Journal of Experimental Biology
Preeti Gupta, N Mathur, P Bhatnagar, P Nagar, S Srivastava
In hospitals a large variety of substances are in use for medical purposes such as diagnostics and research. After application, diagnostic agents, disinfectants and excreted non-metabolized pharmaceuticals by patients reach the wastewater. Indeed, some of the substances found in wastewaters are genotoxic and are suspected to be a possible cause of the cancers observed in the last decades. Genotoxicity tests are an excellent means to study the toxicity and the risk associated with these releases. This paper points out the areas of concern for hospital wastewater disposal and reports the findings of genotoxicity tests for hospital effluents from 3 major hospitals in Delhi, namely All India Institute of Medical Sciences, Apollo and Escorts...
October 2009: Ecotoxicology and Environmental Safety
Ravinder Kaur, P S Minhas, P C Jain, P Singh, D S Dubey
The present study was aimed at characterizing the soil-water resource degradation in the rural areas of Gurgaon and Mewat districts, the two economically contrasting areas in policy zones-II and III of the National Capital Region (NCR), and assessing the impact of the study area's local conditions on the type and extent of resource degradation. This involved generation of detailed spatial information on the land use, cropping pattern, farming practices, soils and surface/ground waters of Gurgaon and Mewat districts through actual resource surveys, standard laboratory methods and GIS/remote sensing techniques...
July 2009: Environmental Monitoring and Assessment
Priyanka Jamwal, Atul K Mittal, Jean-Marie Mouchel
Physical, chemical and microbiological efficiencies of Sewage Treatment Plants (STPs) located in Delhi's watershed in context of different treatment technologies employed in these plants have been determined. There were in all seventeen STPs treating domestic wastewater which were studied over a period of 12 months. These STPs were based on Conventional Activated sludge process (ASP), Extended aeration (Ex. Aeration), physical, chemical and biological removal treatment (BIOFORE) and oxidation pond treatment process...
June 2009: Environmental Monitoring and Assessment
Anju Pant, Atul K Mittal
The microbial profile of an Upflow Anaerobic Sludge Blanket Reactor based sewage treatment plant located at a suburb of Delhi, India, and possible risk due to the pathogenicity of the treated wastewater was investigated. Frequency of occurrence of Salmonella, Shigella and Vibrio was 100% at all the stages of sewage treatment. However, recovery of Vibrio was the highest among all the pathogens. The order of removal of all the pathogens was same at the different stages of the treatment. Ratio of counts of fecal coliforms (FC) and fecal streptococci (FS) at different stages of treatment showed the origin of contamination was from the human source...
October 2007: Environmental Monitoring and Assessment
Manju Rawat, Mechah Charles Zuriels Moturi, Vaidyanathan Subramanian
Delhi has the highest cluster of small-scale industries (SSI) in India. There are generally less stringent rules for the treatment of waste in SSI due to less waste generation within each individual industry. This results in SSI disposing of their wastewater untreated into drains and subsequently into the river Yamuna, which is a major source of potable water in Delhi, thus posing a potential health and environmental risk to the people living in Delhi and downstream. To study the quantity, quality and distribution of heavy metals in liquid waste from industrial areas, wastewater, suspended materials and bed sediments were collected from industrial areas and from the river Yamuna in Delhi...
December 2003: Journal of Environmental Monitoring: JEM
Garima Sharma, N K Mehra, Rita Kumar
There are seventeen drains, which discharge their untreated urban and industrial wastewaters into the Delhi segment of river Yamuna. The Najafgarh drain is the first and the largest drain, and it alone contributes 1667.84 mld i.e. 60% of the total wastewater discharge into the river Yamuna and as such add 81.36 tons of BOD load per day. As per the available data approximately 95% of the wastewater of this drain is biodegradable. In the present study, an attempt has been made to reduce the BOD load and COD levels of wastewater of Najafgarh drain using autochthonous microbial consortium...
October 2002: Journal of Environmental Biology
S K Karn, H Harada
In South Asian countries such as Nepal, India, and Bangladesh, pollution of rivers is more severe and critical near urban stretches due to huge amounts of pollution load discharged by urban activities. The Bagmati River in the Kathmandu valley, the Yamuna River at Delhi, and peripheral rivers (mainly Buriganga River) of Dhaka suffer from severe pollution these days. The observed dry season average of biochemical oxygen demand (BOD) in all these rivers is in the range of 20-30 mg/liter and total coliform are as high as 104-105 MPN/100 ml...
October 2001: Environmental Management
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