0 Training on ETP Management Presented By: M.H. Ali Date: 19 September 2018 Venue: ACML-1, Shreepur.

1 Content of ETP : 1.Global Water Distribution & Use 2.Water cycle 3. Water consumption pattern in Textile industries 4.Source of water pollution 5.Characteristics of Textile Mills’ Waste Water 6.Sludge Management 7.Concept of ETP 8.Importance of ETP 9.Types of ETP 10.Requirements foe ZDHC

2 Global Water Distribution & Use

3 Water Cycle

4 Water level at Gazipur and Narayangonj

5 Waste Water Waste water, is any water that has been adversely affected in quality by a combination of domestic, industrial, commercial or agricultural activities, surface runoff or stormwater, and from sewer inflow or infiltration.

Water consumption patern in Textile industries

What is an ETP? ETP (Effluent Treatment Plant) is a process design for treating the industrial waste water for its reuse or safe disposal to the environment. Effluent treatment Plant covers the mechanisms and processes used to treat such waters that have been contaminated in some way by anthropogenic industrial or commercial activities prior to its release into the environment or its re-use. ETP treat water and make free from all objectionable impurities present in suspension, colloidal or dissolved form. InfluentEffluent Sludge

8 Why ETP need in garment industry?  To clean industry effluent and recycle it for further ruse.  To reduce the usage of fresh/potable water in Industries.  To safe guard environment against pollution and contribute in sustainable development.  Stay in compliance  Reduce transportation and off-site treatment costs

9 Defining the Typical Types of ETP a) Biological Treatment plant. b) Physico-chemical treatment plant. c)Combined physico-chemical and biological treatment plant.

10 Preliminary Treatment Screens Detritor/scrapers Grit Chamber Skimming Tanks Aeration Major Treatment units in ETP Secondary Treatment Activated Sludge Process (ASP) Trickling Filter Aerated Lagoons UASB Multiple Evaporator (ME) Plant Rotating Biological Contactor (RBC) Primary Treatment Sedimentation/ Settling tank Clarifloculator Equalization Tank Neutralization Tank Tertiary Treatment Sand/ Membrane Filters Activated Carbon Filters Disinfection Ion-exchange/ESP Nutrient Removal

Process flow chart of effluent treatment with effluent treatment plan 11 Following is the basic structure of effluent treatment plant:

12 Lay out plan of ETP

Standard test Parameters for ETP Name of EffluentStandard Parameters 1.PH Range1.6-9 (Environment Friendly) 2. DO (Dissolved Oxygen) Mg/Lit 3. TDS (Total Dissolved Solid)3. <2100 Mg/Lit 3.COD (Chemical Oxygen Demand)4. < 200 Mg/Lit 5. BOD (Biological Oxygen Demand)5. < 50 Mg/Lit 6. TSS (Total Suspended Solid)6. <150 Mg/Lit 7. Temperature for Summer7. 40Ofor Winter -45 O 8. Individual buyer’s requirement8. (30 for H&M) 9. Oxidatech tank9. (PH – 7-8) 10. Do

Wastewater Water treatment plant: Wastewater treatment is the process of converting wastewater – water that is no longer needed or is no longer suitable for use – into bilge water that can be discharged back into the environment. It’s formed by a number of activities including bathing, washing, using the toilet, and rainwater runoff. Wastewater is full of contaminants including bacteria, chemicals and other toxins. Its treatment aims at reducing the contaminants to acceptable levels to make the water safe for discharge back into the environment. 14

15 Importance of WWTP? 1.To protect the water pollution. 2. To protect the soil pollution. 3.To maintain ecological balance. 4.Stay with compliance. 5.Ensure physical safety diseases.

16 Waste Water Characteristics and target parameters Effluent characteristics Target pH : 8.0 to to 7.5 DO mg/L : to 8.0 BOD mg/L : 300 to 500 < 30 COD mg/L : 900 to 1700 < 200 TDS mg/L : 200 to 1000 < 2100 TSS mg/L : Not Specified < 30 Temperature : Not Specified < 37 °C Discharge Norms DoE norms, BSR Guidelines pH : 6.0 to to 9.0 DO mg/L : 4.5 to 8.0 not specified BOD mg/L : ≤ 50 ≤ 30 COD mg/L : ≤ 200 ≤ 200 TDS mg/L : ≤ 2100 not specified TSS mg/L : Not Specified ≤ 30 Temperature : Not Specified ≤ 37 °C

Importance of WTP? 1. To protect the water pollution. 2. To protect the soil pollution. 3.To maintain ecological balance. 4.Stay with compliance. 5.Ensure physical safety diseases. 17

Techniques for wastewater treatment 18

Sewage Treatment Plant Sewage treatment is the process of removing contaminants from wastewater, primarily from household sewage. Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safer for the environment. A by-product of sewage treatment is usually a semi-solid waste or slurry, called sewage sludge. The sludge has to undergo further treatment before being suitable for disposal or application to land 19

20 Sludge Management Techniques What is sludge ? Sludge is a product of waste water treatment. It is an potential threat for the environment. Types of Sludge: 1.Industrial Sludge 2.Domestic Sludge

21 Sludge Management Sludge management is an integral part of waste water treatment plant. Sludge management is a process to make use of its materials and energy and to dispose of it efficiently and sustainably. Techniques of Sludge Management 1.Thickening 2.Digestion 3.Dewatering 4.Disposal 5.Stabilisation 6.Hygienisation

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Our Commitment 23

24 DEFINITION OF 5S/ STOPLIGHT - OVERVIEW – Develop audit / monitoring system to ensure incorporation of 5S culture –Eliminate non-essential chemicals from workplace –Organize necessary Chemicals –Assign to optimal area in workplace –Clean the workplace and equipment –Identify regular activities required to maintain clean condition Straighten Sanitize Standardize – Document new procedures Sustain Sort

25 STOPLIGHT Program – Chemical 5S RED (OR NO STICKER) - STOP Immediately Notify your Supervisor, this chemical should not be in a production area. YELLOW - CAUTION Notify your Supervisor if you see this chemical left out, unattended, in a production area. GREEN - GO This chemical is OK to have in a production area. Pre-assessment and assignment of color rating of all new non-food compounds –Obtaining and maintaining all appropriate records on the compounds –Training team members on proper usage within the facility The emphasis is to make sure we all see that lubricants, solvents, cleaners, etc. are being properly used in all plant areas. Color Coding: All non-food chemicals must have a colored sticker/ coding indicating if they are ok to use in production areas.

26 FIVE S’s: “A Place for Everything, and Everything in its Place” Sort Straighten Sanitize Standardize Sustain MAY 1996 JUNE 1996 JULY S Checklist  Floors clean  Tools stored  Gages clean  Std WIP  Safety Guards 5 S5 S Unnecessary