Table of Contents
Biological Treatment Process
Effluent treatment plant are used to treat waste water that comes from different manufacturing industries, where different types of chemicals and dyes are used to treat the materials. After treatment, waste water is directly discharged into the environment. This waste water is harmful to the environment. The purpose of biological treatment of wastewater is to protect the environment from the harmful effects of waste water. An effluent treatment plant is used where waste water is treated and is not harmful to the environment.
In the textile industry, different types of dyes and chemicals are used in weaving, dyeing and garment washing plants. This waste water is treated at an effluent treatment plant. Here I will give an idea of the biological waste water treatment plant. In the dyeing process, waste water is discharged from scouring, bleaching, washing, and dyeing. These dyes and chemicals are supplied to the biological water treatment plant for purification.
In Bangladesh, a lot of dyeing and textile industries have been established for processing textile products. To protect the environment from the harmful effects of the waste water, the Department of Environment, Government of Bangladesh, fixed the following parameters for the waste water that will be discharged into the environment after treatment:
- PH : 6–9
- BOD: 50 mg/L
- COD: 200 mg/L
- Suspended solids: 150 mg/L
- Color: light brownish.
The waste water that is produced in the dyeing industry may have the following characteristics:
- PH: 9-11
- BOD: 300 mg/l
- COD: 200 mg/l
- Suspended solids: 200 mg/l
- Color: Dark
Flow Chart of Biological Treatment of Wastewater In Textile Industry
After treatment, the characteristics of the waste water changed as follows:
- PH: 7-8
- BOD: 30 mg/L
- COD: 60 mg / L
- Suspended solid: 30mg/L
- Color: Light brownish
Process flow chart of a biological wastewater treatment plant:
Effluent comes into collection tank
↓
Equalization tank (Cooling & Mixing)
↓
Primary clarifier tank (Neutralization)
↓
Aeration tank
↓
Secondary clarifier (Tank 1 & 2)
↓
Sludge return to aeration tank
↓
Thickness filter
↓
Fish pond
↓
Outlet
So, that’s all about the biological treatment of industrial wastewater. If you have a better idea, let me know about it.
62 comments
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Md Saiduzzaman
hello I am Md Saiduzzaman. I am complited Diploma In Environmental Technology.I built up my carrear this job. presently I am searching good job ETP/WTP .Now I work Padma bleaching & dyeing limited. So plz help me. Phone 01969228965
S.M. CHAND MIA
Hi, I am sultan mahmud chand mia. working in a physico-bio-chemical etp as a asst. in-charge from 2010. I am from general student. passed H.S.C in 2005. looking a college or university for academic certificate in etp. anyone here can help me?
It’s me- 01755109667.
Al-Emran Hossian
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Hi
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Pankaj suryawanshi
Res sir
I am working on innovative textiles Ltd for ETP RO MEE plant for the post of chemist and operation
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shahadat
This lecture is so much needed for students also the owner who plans to established a garments factory.. and one thing to admin your lectures we can not copy.. but i need it.. if u can, plz send in my email.. thanking — shahadat
Nasi Uddin
I am Nasiruddin. I am complited Dploma in Environmentl Techonology.I am a sub assistant engineer in Padma Bleaching & Dyeing Ltd.I also working at ETP & WTP.I build up my carrear this job.so i need perfect job plz help me..01939133691
Md.Shafiqul Islam Manik
Md. shafiqul Islam manik. job:MICRO FIBRE GROUP. I am ETP/WTP and BOILER inch:/asst: engr: at group.I am tell now 9 years. CONTACT Num : 01712004612
AR Anwar
I am completed diploma in environmental technology. I also working at ETP & WTP.
I know manually and digital parameters all water test ETP and WTP. I also know Environmental issue Bangladesh standard waste water from industrial surface water ECR 1997 and Environmental low 2003. I buildup my career this field… now I am working at DBL group biggest ETP it is 7500 m3 per day..I am working ETP technician post. any big offer for me..plz 01750951580
Md.Shuvo
Hello
I am Mohammad Shuvo. I work at Effluent Treatment Plant a reputed garments factory. My job designation Executive Environment and my jobs responsibility is Environmental Compliance, Environmental Clearance Certificate, Environmental All Project, Energy & GHG,Higg Project , Sipp Project, Waste management, Chemical Management, Effluent Treatment Plant(ETP)Operation ,ETP Cost Analysis, Environmental Health & Safety, Waste Water Test, Risk Assessment etc. I’m saying my job Experience ETP is Emergency issue in our country . Most of the buyers and Department of Forest Sought 100% proper functional ETP all factory. One of the best functional Plant is Biological Plant but some problem for Biological Plant i means operational problem this problem solve with qualified person. Who can take care ETP operation properly in your Plant. I am in this field for last 3 years till now. I want to Develop my self in this field. If any one need help about Biological and Chemical ETP please be inform me.
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Abu Syed
Thanks
MD Arif hossain
I am Arif Hossain
I am completed my diploma engineering in mechanical technology now I am work wast water system in chamical etp plant,I want know about biological plant,please any help me about it.
Md Khairuzzaman
I am Khairuzzaman, Working BEPZA Environmental Testing Lab, I have Passed M.Sc in Microbiology from Jagannath University. now I want to a high rich job in WTP or ETP . Cell 01710532989
Azad hossain
This is Azad hossain from Gazipur, I am working as a maintenance manager, thank u very much for these very helpful feature , may I know something more about your product, such as how sizes spaces u need for 100 m3 /hr capacity ETP, & what type of chemical (if any) do need to run it & its consumption, Thanks
Mohammed Nurul Abser
Dear All,
we have been applied Boi-Chemical ETP. Capacity 50m3/hr since 2010 to till on operation condition, At present will prepared to Extend Capacity 120m3/hrs. but additional space is limit (app: 2100 Sft).
Would like to proper advice regarding apply modern technology , low operational cost , maintain proper parameter etc.
Thanks and Best regards
M.N.Abser.
Abdur Rahim Munna
assalamu alaikum, I am Munna, from DUET (textile dept.). I am a seeker about ETP. can anyone help me by giving an opportunity to visit your ETP mechanism? plz
mobile: 01819675269
pallavi
Hi dis is pallavi.p student of Msc environmental science ,now finished the PG , so am in search of job in effluent treatment plant so if vacancy is there please inform me
Mehdi Hasan Sumon
This is Mehdi hasan sumon. Working near about 5 years with biological ETP Plant. Want to admit an excellent working facilities.
Abu Syed
plz send important docoment about of biologycal etp & wtp.
sohel chowdhury
hello Mr. Mehdi
We mainly deal with bacterial enzyme, which you can use in Biological tank to maintain required BOD, COD & TSS. We are a USA based waste water treatment company selling biological product in Bangladesh through our local agent.
Please let us know, what kind of help you looking for, may be we can help your plant if required.
Thanks
Sohel Chowdhury
Phone: 1(647)831-3850
surendiran.K
Am student in M.sc Microbiology from Periyar university,i choosing my M.sc final year project topic is PAPER EFFLUENT OF WATER TREATMENT (dye degrading method).but, now am confused for the methodology,so please anybody help the project methodology..please help me,send methodology from this mail id [email protected]
Thank you……….
Ruhul Amin
Hi,I am Ruhul amin from Rajshahi I am completed Diploma in Environmental Technology.Now working at effluent treatment plant and water treatment plant.i can that water parameter ph.Tds.Do.Th.Bod.cod.etc but I went a environment related jobs so please help me anyone.please contact me 01725020389
Kazy Mohammad Iqbal Hossain
Dear Textile Technologist/ Writer of this main article,
I am so sorry to say that you do not have any basic idea regarding waste water chemistry. In 3rd Paragraph of your articles, mentioned the waste water characteristics as like BOD- 300 mg/l and COD-200 mg/l. Do you exactly know what is BOD and what is COD?
The hydrocarbon(e.g. starch) which can be oxidized by micro-organism through their metabolic process can be indirectly measured by BOD. The relationship is if 23 gm oxygen is required to oxidized 12 gm carbon, so if you know the oxygen lost from the water, you can calculate the amount of carbon present in the waste water. Usually BOD is measured for 5 days period or in some cases for 3 days period or some time the ultimate BOD is also calculate.
For your information, the hydro carbon which can be metabolized by bacteria can also be oxidized by Chemical Oxidizer (such as K2Cr2O7, KMn04, H202, 03, etc.). It is also for your information, a good oxidizing agent like dichromate can oxidize 100% of organic carbon but bacteria can not metabolized all hydrocarbon (especially which is known as persistant organic matter, or long chain complex organic matter).
So, the information what I want to give you that COD value can not be less than the BOD value it can be maximum equal for very easily biodegradable compound like cooked rice. But for textile, COD will be at least 1.5 times higher than BOD. Also note, BOD is a term which the ETP designer use rather they use COD and break down it in to two parts. The term which we use at BOD is mentioned as bCOD by them. The formula is
COD= bCOD+ nbCOD where bCOD= biodegradable organic matter and nb COD non biodegradable organic matter.
So, bCOD= COD-nbCOD
I will humbly request you, not to publish any materials in public domain about which you do not have very clear understanding. You are welcome for any quarries.
Please take my sincere apology for this, my intention was not any how to personally attack you.
With Kind Regards,
Kazy Mohammad Iqbal Hossain
Senior Environmental Chemist-Asian Subcontinent
C&A Sourcing International Ltd.
Bangladesh Hub
Rishikesh Pandey
Thanks for the Information and one more thing i want to know that can you tell me about the average costing of the whole E.T.P process to make the water Reusable?
Noyon Chandra Roy
I am a student of textile engineering in DUET.. what is the main process in waste water processing that’s use in industry..Could you inform me ??? i have a new idea to waste water processing…if you kindly inform me those of this process, then i share my knowledge to this….
taim khan
i am taim khan. i am works in e.t.p (biological)&w.t.p of purbani group. i know all test e.t.p & w.t.p. i bbuild up my carrear this job. so i nneed a perrfect job please anyyone help me.leave in gazipur, dhaka,bangladesh.
phone no 8801718829442
vivek khaddar
Dear sir ; pls send me basic fundamental of biological and also work of lime . Ferrous . Poly . Oregano plus plus . And their properties and reaction with effluent. Thank you very much sir
sakthi
This is very useful guidlense for me…..
mudar sf
I M Mudar S.F. wants to know Characteristics of waste water of flowing into ETP Aeriation Tank, before & after
Ramendra singh raghav
Equalisation before and after secondary clarifier
Al Amin Masud Alam
An ETP is under construction in Litun Fabrics Ltd. All technical and fabrication data are required to do the job properly.
MD. MAHABUBUR RAHMAN
Sir, I need a job for build-up my career on ETP. Please help me for an ETP job.
Masud Rana
I AM MASUD RANA WORK AN EFFLUENT TREATMENT PLANT AS MANAGER- E.T.P. I THINK ETP IS IMERGENCY ESSIU IN OUR COUNTRY AND FOR A BIOLOGICAL PLANT NEED A QUALIFIED PERSION. WHO CAN PROPER TAKE CARE ETP OPERATION PROPERLY. I AM IN THIS FIELD FOR 7 YEARS TILL NOW. I WANTS TO DEVELOP MY SELF IN THIS FIELD. if any one need help about biological ETP please be inform me.
Jahir Uddin Alamgir
Yes I need your help and my contact no. +8801711522538
Feroz
pl communicate
Md Sharif uddin
I am a diploma engineer in an environmental technology. I need a job. Please give me a job sir.
WaseemRashid
I also working on etp plant as a operater
I feel that it is very necessary for a goOd environment….
sandeep
Hi Masud,
Your vision in the field of ETP is well appriciated. Kindly share your experience in the field of fully bio logical ETP for textile dyeing units. As per my knowledge operating fully bio ETP is very difficult due to change in parameters.
Sandeep
Das
We are ceramic membrane manufacturting company for waste water plant for waste water treatment plant, STP, ETP, MBR.
Please visit our product details in our website for your kind perusal.
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anayet ullah
Please help me about etp.
Pravez
Sir ..i am pravez alam ..recently i joind a texatile company …so ETP is quit new for me ..so sir i just need to about the main components of ETP and their works ….like working of collection tank …aeration tank .etc.
taim khan
sir I am taim khan I am a asst in charge in etp&wtp of tanaka group I know all etp test in chemical process plz give me a perfect job I am diploma in environmental technology I am read in b.s.c civil and environmental engineering plz help me 01718829442 it’s my contact number
Abu Syed
I want to about of biological etp & wtp.plz help me
Rikat hossen
I am Rikat hossen . I need job . I am compliting diploma in Environmental Engineering .
Shair Abbas Khan
Yes i want your help
shah solaiman
hi sir i m also etp operator . now i like to know about BOD test
Mizanur Rahman
Call me 01911-416895
Mohsin Ahmad
Sir,
I am Mohsin Ahmad. Completed Diploma in Engineering on Environmental Engineering Department from Dhaka Polytechnic Institute.I deternine that ,I like to buildup my career on ETP.I need some help by you……plice.
Mohsin Ahmad………01680974284
Ashok Bhattacharya
I’m from Wock Oliver based in India managed by Australia based professionals who are in ETP and STP field since long. Wock Oliver is one of the best water, waster water and effluent solution provider. It’s unique prefabricated & pre engineered biological effluent treatment plant is the best in it’s class. For more info mail your requirement to
M.A Motin
Dear Sir ,
I want to Know about Bio-logical ETP, how Can I colorless the water. After treatment ? Please tell How much de-colorent / polymer would be use?
Mizanur Rahman
Dear every helpful person,
I am Mizanur , I worked CETP at Apex Holdings Ltd.
I am studying Msc. Environment Science at State University .I need a job Emergency ….
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alamin
I know. plz call me now. any time
ENGINEER'S POLYCHEM
We are manufaturing efficient and economical DECOLRANT for textile Dyeing & Printing waste [email protected]
Ferdaus
Hello,
Mr. Masud Rana we are a China based company in Bangladesh looking for a skilled person who have experience in ETP/WTP field, if you are interested please contact with us.
Thank you
Ferdaus Zia
01712515069
Dr. M. Shohidullah Miah
I am expert on ETP system developmen.
Dr Md Shohidullah Miah (PhD)
Chairman, Japanese ETP consulting Firm
and
Director and Coordinator
College of Agricultural Sciences
IUBAT—International University of Business Agriulture and Technology
4 Embankment Drive Road, Sector 10, Uttara Model Town, Dhaka 1230, Bangladesh
Cell: 01748190474
Md. Omar Faruq
I m faruq,as a plant incharge in ETP & WTP in star ceramics ltd.can u help me to get me a multinational company job in thir requird field.thanks & contact my phon no.01916234554
alamin
Plz help me
sohel chowdhury
Hello Mr. Masud Rana
ABS a US bioteh company is looking for a suitable person to market Bacterial Enzyme & nutrient product for Biological treatment in Bangladesh. If you are interested please send your C.V with relevant ETP/WTP chemical & Biological experience.
Thanks
Sohel Chowdhury
(647)831-3850
Sandeep
Job