This presentation discusses the discharge limits of various parameters for textile industries in Bangladesh. It introduces the group members and provides background on the need for effluent treatment plants and standards. Key parameters discussed include pH, BOD, COD, TDS, TSS, and others. The objective is to understand typical effluent characteristics and the discharge limits set by the Department of Environment. Discharge limits are specified for textile industries, with BOD below 50 ppm and COD below 200 ppm. The conclusion stresses the importance of following discharge limits to protect the environment.

1. WELCOME TO OUR PRESENTATION
on
Discharge limit of
different parameters

2. GROUP- 4
Group members-
Nazmun Nahar –2007100400018
MD.Amimul Ahsan – 2007100400019
MD.Abu Sayeed- 2007100400020
Leuny D Costa- 2007100400021
MD.Samiur Rahman Khan-2007100400023

3. INTRODUCTION
A major environmental hazard present in textile
industries is the discharge of untreated effluent to
the environment, causing pollution of nearby soil
and water. To mitigate the risks from the discharge
of untreated water, an effluent treatment plant is
required. Effluent must meet the national effluent
discharge quality standards. As water passes
through the ETP, pollutants are removed and the
quality of the water is improved, allowing for final
discharge to the environment without significant
risk. For that the Department of Environment bind
a standard Discharge limit for the Each Industries
who produce waste water and Discharge it
through the pipe line in the nearer water body.

4. OBJECTIVE
To know the typical effluent characteristics.
To gain knowledge about the different types
of discharge limit ,their definition & the
maximum limit.
To know about DOE, what are their function
their limitation, how they justify the limit,
given the standard limit DOE etc.

5. NAME OF DIFFERENT PARAMETERS
 .
DO(Dissolved Oxygen).
BOD (Biochemical Oxygen Demand).
COD (Chemical Oxygen Demand).
TDS (Total Dissolved Solids).
TSS (Total Suspended Solids).
Phenols.
Metals & Metalloids.
Ammonia.
Chloride.
Sulphide.
Oil & Grease.
Nitrate & Nitrite.
TOC (Total Organic Carbon)

6. CHARACTERISTIC OF IMPORTANT PARAMETERS
A value taken to represent the acidity or
alkalinity of an aqueous solution and defined as
the logarithm of the reciprocal of the Hydrogen
ion concentration of a solution.
It is Expressed Numerically on a scale from (O
to 14). Neutral solution Having a of 7. Acidic
between 0 to bellow 7& alkaline between above
7 to 14

7. Biochemical oxygen demand ( BOD) BOD is
a chemical procedure for determining the uptake rate of
dissolved oxygen by the biological organisms in a body
of water. The organic load is expressed in terms of
BOD, which mg of Oxygen needed to Decompose the
organic material in 1 liter of waste water. Required
oxygen are decompose by bacteria.
BOD can be used as a gauge of the effectiveness
of Waste water treatment plants.
The parameter is commonly measured by the quantity
of oxygen utilized by bacteria during 5 days culture
period. For this it is known at 20°C.

8. Dissolved Oxygen-
DO levels depends on the physical, chemical &
biological activities of the water body. In normal
water the range of DO is 4 to 6 PPM.
TDS (Total Dissolved Solids)-
Total Dissolved Solids (often abbreviated TDS) is
a measure of the combined content of all
inorganic and organic substances contained in a
liquid in molecular, ionized or micro-granular
suspended form. Generally the operational
definition is that the solids must be small enough
to survive filtration through a sieve the size of two
micrometer.

9. COD - Chemical Oxygen Demand
The chemical oxygen demand (COD) test is commonly
used to indirectly measure the amount of organic
compounds in water. Most applications of COD
determine the amount of organic pollutants found
in surface water (e.g. lakes and rivers), making COD a
useful measure of water Quality. It is expressed in
milligrams per liter (mg/L), which indicates
the mass of oxygen consumed per liter of solution.
Older references may express the units as parts per
Million(ppm).
TSS (Total Suspended Solids)
Which particles are stay over the water surface.
Standard limit of TSS in 100 (mg/L)

10. DOE
The full meaning of DOE is Department
Of Environment. In Bangladesh,
Department of Environment is the
regulatory body to monitor & control
the pollution from the industrial
discharge.DOE mentioned some
discharge limit of different types of
parameter o textile effluent. As their
mentioning parameter textile industries
maintain their limit of different
parameter

11. LIMIT LEVELS OF PARAMETERS OF TEXTILE
Table 1: Liquid Waste discharge standard
for textile industries(Active in
Textile).
Parameters Limit
6 to 9
Biochemical oxygen demand or BOD 50 PPM
chemical oxygen demand (COD) 200 PPM
Total Dissolved Solids (TDS) 2100 PPM
Total Suspended Solids (TSS) 150 PPM
Oil & Grease 10 PPM

12. STANDARDS FOR DISPOSAL OF LIQUID WASTE
WATER OF TEXTILE MILLS
Treatment of effluent from textile dyeing
industries is required to meet the
national and international effluent
discharge standards. It is required to
meet the national standards to abide by
the rules set up by the government and
to meet the international standard to
comply with the standard set up by the
buyers.

13. Discharge limit of waste
water set by DOE of
Bangladesh

14. DISCUSSION
A large portion of the industries
wastewater originates from dyeing
operations. Waste waters from these
operations typically contain by
products, residual dye, auxiliary
chemicals & cleaning solvents. Dyes in
waste water maybe chemically board to
fabric ,fibers. Discharge limit is the
limit guided by DOE. ,BOD,TDS are
very sensitive for textiles which are
must be controlled for textile.

15. CONCLUSION
Discharge limit of different parameters of
the waste water must be follow by the
industry. The discharge limit of different
types of parameters used in wet process
& others. The water quality depends on
effluent types & discharge quality from
different types of industries. The
government should take inactive to
regulate regularly at an important basis.
Because if our environment is not save
then we will note save. we have to think
now for our benefited.

16. REFERENCES
 “Environmental chemistry”
Third edition, By-Anil Kumar De
New Age International (P) Limited.
 www.doe-bd.org

17. ACKNOWLEDGEMENT
We would like to express many thanks
to our honorable teacher Dr.Arun kanty
Guha for giving us a very good
opportunity for presenting ourselves.
We also thanks our parents who
encouraged us every step of our life.
Lastly thanks all of you who are give
kind attention for this presentation
ceremony .