Scope of reuse of sewage for baroda city

Prof. A.R. ShahSr. Reader

Civil Engg. Dept.Faculty of Tech & Engg

M.S. University of Baroda&

In-Charge of Environmental Laboratory Co-ordinator

Env. AUDIT SCHEME FOR SHEDULE –I INDUSTRIES OF GUJARAT STATE

Member Of Governing Council For

Gujarat Env. Management Institute (Gemi) In-Charge Of U.G. & P.G Course In Env. Engg

In-Charge Of P.G. Diploma In Env. Science Course.

1.0 CONCEPT OF REUSE

Continued population growth, increased water demand, increased contamination of both surface water and ground water, uneven distribution of water resources, decreased fresh water sources, increased costs of fresh water, periodic droughts etc. have forced water management agencies to search for new sources of water supply and advanced waste water treatment methods for municipal and industrial waste water so as to develop the reuse of water as a viable option of water conservation.

Reuse refers to the process by which water used for one purpose or by one industrial process is used again by another purpose or by another different industrial process.

Recycling is the use of effluent with or without treatment for the intake of the same use of water.

Water reclamation recycling and reuse represent significant components of the hydrological cycle in urban, industrial and agricultural areas. A conceptional overview of the cycling of water from surface and ground water sources to water treatment facilities, irrigation, municipal and industrial application and to water reclamation and reuse facilities is shown in following figure:

THE ROLE OF ENGINEERED TREATMENT, RECLAMATION AND REUSE FACILITIES IN THE CYCLING OF WATER THROUGH THE HYDROLOGIC CYCLE

REUSE OPTIONS AND APPLICATION

1. IRRIGATION REUSE

Agriculture irrigation is the largest current use of reclaimed water. This reuse category offers significant future opportunities for water reuse. Landscape irrigation, includes the irrigation of parks and gardens, play grounds, golf courses, freeway medians, landscaped areas, commercial office and industrial developments and landscaped area around residencies.

Many landscape irrigation projects involve dual distribution system- one distribution network for potable water and another for reclaimed water.

2. INDUSTRIAL REUSE

There are many possible industrial uses of renovated waste water are subjected to the wide variety of treatments systems that might have to be employed

3. RECREATIONAL REUSE

Reuse of waster water in recreational lakes must satisfy both health standard and standard that will make the lake acceptable from the recreational stand point.

4. GROND WATER RECHARGE

One of the reuse application for the reclaimed water is ground water recharge via either spreading basins or direct injection to ground water aquifers.

REUSE FOR CONSTRUCTION

REUSE FOR CENTRALLY AIR CONDITIONED PLANTS

REUSE FOR SOIL COMPACTION

REUSE FOR REFUSE COMPACTION

REUSE FOR SALT WATER INTRUSION

REUSE FR OILFIELD REPRESSURIZATION

etc……etc……..etc………………

Establishment of facility performance standards Information search on source characteristics and

continuity Performance on economical and technical studies Testing of unmixed or segregated wastes Testing of selection material of waster recycle and

management mix proportion with other material Assessment of regulation Estimation of material, procedure and plan Development of monitoring and maintenance Pre-implementation life cycle cost estimation Monitoring maintenance and periodic assessment

Treatment methods for reuse of waste water Screening and settling Biological processes Aerobic processes Anaerobic processes Advanced processes Coagulation and flocculation Solid removal Removal of organics’ Reverse osmosis Ion exchange Softening by lime and soda ash or by zeolite process Ultraviolet radiation Chlorination Ultra filtration Ozonation

CASE STUDY NO : 1

LIMITED REUSE OF DOMESTIC WASTEWATER FOR GARDENING AND OTHER PURPOSES (EXCEPT POTABLE ) FOR NEARBY AREAS OF SEWAGE PUMPING STATIONS OF BARODA CITY

CASE STUDY NO : 2

REUSE OF TREATED SEWAGE FROM NEW SEWAGE TREATMENT PLANT AT ATLADARA FOR INDUSTRIAL AREAS ON THE DOWNSREAM

BARODA CITY

TOTAL MUNICIPAL AREA : 110 SQ. K.M. POPULATION : @ 17 LAKHS MAIN SOURCES OF WATER: AJWA RESERVIOR MAHI RIVER FRENCH WELLS 22 NOS. CORPORATION’S TUBE WELLS PRIVATE TUBE WELLS. SEWARAGE SYSTEM: UNDERGROUND SEWARAGE SYSTEM SINCE

1894. SEWARAGE ZONES OF VADODARA CITY: ZONE NO 1: TARASALI WARD NO 4, T.P.SCHEME 18, &19, G.I.D.C.,

O.N.G.C., DANTESHWER, VADASAR, MANJALPUR ZONE NO. 2: WADI old city, raopura, bavajipura, fatehpura

wadi, t.p. schemes no 3 ,4,5,7,&9. harani, karelibaug. ZONE NO 3. : ATLADARA : SAYAJIGUNJ ,RAILWAY STATION,

ALEMBIC, SARABHAI, RACE COURSE, T.P. 1 ,2, 11, 12, 13, &15. GORWA, SAIYAD VASANA, TANDALAJA, ATLADARA PROPOSED T.P. 20,21, 23 &24.

AUXALLARY PUMPING STATIONS FOR WADI SEWARAGE ZONE

1. SAYAJI HOSPITAL. 2. SARDAR BHAVAN. 3. KALUPURA. 4. YAKUTPURA. 5. NAVAPURA. 6. KEVDABAUG. 7. BAHUCHARAJI. 8.HARNI ROAD. 9.V.I.P. ROAD. 10. WAGHODIA ROAD. 11. AJWA ROAD.

AUXILLARY PUMPING STATIONS FOR TARSALI ZONE:--

MANJALPUR LALBAUG TARSALI MAKARPURA G.I.D.C.

FOR ATLADARA SEWARAGE ZONE :

AUXALLARY PUMPING STATIONS FOR ATLADARA SEWARAGE ZONE 1. SAMA

2.SHASTRI BRIDGE3. NARHARI HOSPITAL.4. KALAGHODA.5. JETALPUR ROAD6. GORWA.7.GAYATRI NAGAR.8. VASNA ROAD.9. KALALI.10. HARI NAGAR.

SEWAGE TREATMENT PLANTS IN BARODA

CITY 1. TARASALI : DESIGNED CAPACITY: 9.0 M.L.D.

2. WADI : DESIGNED CAPACITY : 27.0 M.L.D.

3. ATALADARA : DESIGNED CAPACITY : 27.0 + 45.0 M.L.D.

AUXULARY PUMPING STATIONS SELECTED FOR CASE STUDY 1. SHASHTRI BRIDGE. 2. GAYATRI NAGAR. PROCEDURE FOLLOWED : THE MONTHLY FLOW RECORDS WERE REFERRED TO

DECIDE THE MINIMUM QUANTITY OF FLOW AVAILABLE THAT CAN BE CONSIDERED FOR TREATMENT FOR REUSE PURPOSE NEAR THE PUMPING STATION AREAS.

THE GRAB AND COMPOSITE SAMPLES WERE COLLECTED FROM THE WET WELL OF THESE PUMPING STATIONS AND THE ANALYSIS OF THE IMPORTANT PARAMETERS WERE CARRIED OUT IN THE ENV. ENGG. LAB. OF M.S.U., BARODA.

BASED ON THE QUANTITY AND QUALITY OF THE SEWAGE TO BE REUSE THE FOLLOWING LABORATORY SCALE TREATABILITY STUDIES WERE CARRIED OUT.

PROPOSED TREATMENTS :

1. ACTIVATED SLUDGE PROCESS.

2. CLARIFICATION.

3. SAND FILTRATION.

4. CHLORINATION.

MOBILE SMALL PACAGE S.T.P.

DESIGN OF SMALL PACAGE S.T.P. OF 10 M3 AND 50 M3 CAPACITY WERE CARRIED OUT.

COST ESTIMATE FOR 10 M3 PLANT.

COST ESTIMATE FOR 50 M3 PLANT.

CASE STUDY NO 2.:

FEASIBILITY STUDY FOR INDUSTRIAL REUSE OF TREATED EFFLUENT FROM SEWAGE TREATMENT PLANT..

43.0 M.L.D CAPACITY NEW S.T.P. ON THE NEW PRINCIPAL OF UPFLOW ANAEROBIC SLUDGE BLANKET TECHNIQUE WAS SELECTED FOR THE STUDY PURPOSE.

PROCESS FLOW DIAGARAM OF THE S.T.P. IS AS FOLLOWS :

METHODOLOGY FOR CASE :2.

COMPOSITE SAMPLES FROM OUT LET OF S.S.T. WERE COLLECTED AND ANALYSED AND THE RESULTS ARE GIVEN IN THIS TABLE:---

THE RESULTS WERE COMPARED WITH STANDARDS FOR DRINKING WATER ( IS 10500 AND W.H.O.) , COOLING; IRRIGATION WATER AS PER IS 2490.

TREATABILITY STUDIES:---

TREATABILITY STUDIES WERE CARRIED OUT MAINLY FOR MPN, AND BACTERIAL COUNT, BOD, COD, S.S., TOTAL HARDNESS, CARBONATE HARDNESS AND COLOUR AND ODOUR.

VARIOUS OPTIONS OF LABORATORY TREATMENTS WERE CARRIED OUT FROM THE FOLLOWING :----

COAGULATION, FLOCCULATION SEDIMENTATION AND FILTRATION.

CHLORINATION. SOFTENING BY ION EXCHANGE COLUMN. SOFTENING BY LIME-SODA ASH PROCESS. U.V. RAY TREATMENT. OZINATION.

RESULTS OF TREATMENTS:----

REUSE OF WASTEWATER

types of waste:-- Solid Liquid Gaseous Domestic Industrial

Types of reuses:- Direct and Indirect & Recycling. Potable and non potable.

MANAGEMENT OF INDUSTRIAL REUSE W.W. WITHIN THE PREMISES: 1. DETERMINATION OF FRESH WATER SUPLY AND WASTE WATER AS A WHOLE 2.DISTRIBUTION OF WATER WITHIN THE INDUSTRY AND COLLECTION OF W.W. FORM

VARIOUS STEAMS IN THE SAME. 3. PROPER SEGREGATIONS, OPTIMISATION AND DISCHARGING IN TO THE W.W.

TREATMENT PLANT. 4. PROPER DESIGNING OF W.W.TREATMENT PLANT. 5. PROPER DECISIONS FOR TYPE OF REUSE TO BE PARCTICED FOR REUSE OF TREATED

W.W. FROM EFFLUENT TREATMENT PLANT. (SAY FOR IRRIGATION, GREEN BELT, TREE PLANTATIONS ETC. IN THE PREMISES.)

6. PROPER DESIGNING FOR THE REQUIREMENTS OF SOIL TYPE IN EACH AREA OF THE INDUSTRY.

7.PROPER DECISION ABOUT THE TREES TO PLANTED AND NURRESERIES AND LOANS TO BE GROWN.

8. PROPER ASSESSMENT OF REQUIREMENTS OF WATER OF EACH PORTION OF THE PLANTETION.

9.PROPER GESIGNING OF TREATED W.W. DISTRIBUTION SYSTEM. 10. PROPER EXECUTION SCHEDULE OF CONSTRUCTION OF FACTORY,

WATER SUPLY LINES, W.W. COLLECTION LINES, E.T.P, COSTRUCTION OF RETURN

TREATED W.W. LINES., PLANTATIONS OF TREES ETC.

. 11. CONTROL ON QUANTITY AND QUALITY OF WATER AND W.W. AND PERFORMANCE OF E.T.P.

“THANK YOU ALL”….