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മൊത്തം യാത്രയിലെ അദ്ദേഹത്തിന്റെ ശരാശരി വേഗത എത്ര കി.മീ. ആണ് ?

(a) 108km/hr.          (b) 54 km/hr 
(c ) 90 km/hr           (d) 48 km/hr. 
ഉത്തരം : (d) 
3.abc/ ab + bc + ac 
= 3 x 80x60 x 30/(80x60)+(60x30)+(80x30)
= 3 x 80 x 60 x 30/ 4800+ 1800 + 2400
= 3×80×60×30/9000  = 3×8×6×3 /9 = 48km/hr 


തീവണ്ടിയും � ....etc

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Wastewater Treatment systems rely on microbes to perform the function of the breakdown of sewage influent. These microbes live in the sludge of treatment plants and holding tanks. They digest the solids and breakdown various compounds. Some wastewater treatment systems are exceptionally efficient, others perform effectively soon after start up, but later stop performing as well.
The key to understanding how and why some wastewater treatment systems work well and others don't, is the need to understand what these microbes need to function. As mi ....etc

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Introduction to Wastewater Treatment Processes
Wastewater treatment is closely related to the standards and/or expectations set for the effluent quality. Wastewater treatment processes are designed to achieve improvements in the quality of the wastewater. The various treatment processes may reduce:

Suspended solids (physical particles that can clog rivers or channels as they settle under gravity)
Biodegradable organics (e.g. BOD) which can serve as food for microorganisms in the receiving body. Microorganisms combine this matter with oxy ....etc

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i need materials for textile wastewater treatment using sugarcane bagasse. containing its processes, neccessary materials, effects, application, any possible impurities, procedures etc. ....etc

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TREATMENT OF DISTILLERY WASTEWATER USING MEMBRANE TECHNOLOGIES
Presented by
SANJAY KUMAR
(Roll No. 09318001)
Under the guidance of
Professor Anil Kumar Dikshit
CENTER FOR ENVIRONMENTAL SCIENCE AND ENGINEERING
INDIAN INSTITUTE OF TECHNOLOGY BOMBAY

INTRODUCTION
1.1 BACKGROUND
The purification of waste water from various industrial processes is a world wide problem of increasing importance due to the restricted amounts of water suitable for direct use, the high price of the purification and the necessity of utilizing the wa ....etc

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BY: P.D.NITYA




Need For Low Energy- Intensive Methods For Treating Low Strength - Large Volume Wastewater (like sewage, industrial washwater, etc.)

1.1 Definition of Low Strength Wastewater

Typical composition of untreated domestic wastewater (influent) was defined using concentration levels as weak, medium, and strong. Weak, medium, and strong levels of BOD5 (mg/L) were identified as 110, 220, and 400, concentrations of TSS (mg/L) were identified as 100, 220, and 350, and concentrations of F ....etc

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Membrane Bioreactor for Wastewater Treatment

Recent technical innovation and significant membrane cost reduction have pushed membrane bioreactors (MBRs) to become an established process option to treat wastewaters. The combination of membrane separation with a suspended growth bioreactor is now widely used for municipal and industrial waste treatment (Judd, 2006). When used with domestic wastewater, MBR processes could produce effluent of high quality enough to be discharged to coastal, surface or brackish waterways or to be reclaimed for u ....etc

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The application of Membrane Bioreactor (MBR) in waste water treatment is widespread. The Membrane Bioreactor process consists of a suspended growth biological reactor combined with a membrane unit located either external to the bioreactor or mounted within the bioreactor. Nowadays researchers have been exploring the use and extend of their applications for treatment of municipal and industrial waste waters. It is an efficient process for maintaining a long solids retention time(SRT) at a relatively short hydraulic retention time(HRT).While a hi ....etc

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