Review of existing Sewerage System
History
Describe chronological development of sewerage system and sanitation in city including physical works, O&M systems etc. Describe major expansion done in last few years and any plan for future development
.Input Requirement |
Data Source |
Remarks/Design criteria |
Year of start of sewerage scheme, what works were done initially of network, SPS, STP, details of length, size, material, pumps, effluent disposal etc. Subsequent developments, capital expenditure done and physical work done in last 3-5 years, Future expansion proposal if any, O & M system, quantity of waste water over the years, quality of influent and effluent |
Relevant Institute handling expansion and one handling |
Sewer Network and Condition
Collect information of the existing network, a map showing location of pipes, type of pipes, sizes, bedding, invert levels, drop man hole, appurtenances such as man holes, ventilating shaft, scrapper man holes, material of construction used, sizes. Assess condition of pipes and appurtenances by enquiry with O & M staff & residents.
Input Requirement |
Data Source |
Remarks/Design criteria |
Collect information of the existing network, a map showing location of pipes, type of pipes, sizes, bedding, invert levels, drop man hole, appurtenances such as man holes, ventilating shaft, scrapper man holes, material of construction used, sizes. Assess condition of pipes and appurtenances |
ULB and enquiry with O&M staff & residents. |
Sewage Pumping Station
Location and nomber of SPS. Mechanical and Electrical equipment available with details about head, discharge KW etc. type of pump, sump details Estimate quantity of waste water pumped by noting operating hours, Assess condition & efficiency of M&E equipment, Power bill amount, staff for maintenance, expenditure head wise on O&M. Details of screening, Power generation etc
Input Requirement |
Data Source |
Remarks/Design criteria |
Location and number of SPS. Mechanical and Electrical equipment available with details about head, discharge KW etc. type of pump, sump details Estimate quantity of waste pumped by noting operating hours, Assess condition & efficiency of M & E equipment, Power bill amount, staff for maintenance, expenditure head wise on O & M. Details of screening, Power generation etc |
Institution responsible for sewerage |
Sewage Treatment Plant
Location and nomber of STPs. Mechanical and Electrical equipment available with details about capacity, Assess condition & efficiency of M & E equipment, Power bill amount, staff for maintenance, expenditure head wise, Influent quality and effluent quality , process quality after different units, Quantity of waste water
Input Requirement |
Data Source |
Remarks/Design criteria |
Location and number of STPs. Mechanical and Electrical equipment available with details about capacity, Assess condition & efficiency of M & E equipment, Power bill amount, staff for maintenance, expenditure head wise, Influent quality and effluent quality , process quality after different units, |
Institution responsible of sewerage |
Effluent and Sludge Disposal
Describe how effluent and sludge is disposed
Input Requirement |
Data Source |
Remarks/Design criteria |
How effluent and sludge is disposed |
Institution responsible for sewerage |
Effluent Disposal Standards |
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Parameters |
Standards for disposal in |
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Inland Surface water |
Land for irrigation |
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BOD (mg/l) 5days 200C |
30 |
100 |
|
TSS (mg/l) |
100 |
200 |
|
COD(mg/l) |
250 |
- |
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pH |
5.5-9.0 |
5.5-9.0 |
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|
|
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Sulphides (mg/l as S) |
2 |
- |
|
Total Chromium (mg/l as Cr) |
2 |
- |
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Faecal Coli form MPN/100 ml |
|
|
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Desirable |
1,000 |
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Maximum. Permissible |
10,000 |
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Institutional setup
Describe institutions responsible for sewerage/sanitation for expansion, for O&M and for recovery etc. Review the institutions about their strengths and weaknesses. What is the structure of organizations, current staff strength.
Input Requirement |
Data Source |
Remarks/Design criteria |
Organizations responsible at city level for expansion and for O&M, Organization structure, current staff strength and availability, Review strength and weakness of relevant organization |
ULB |
O&M
Head wise (Staff, Power, repairs, chemicals etc) expenditure in last 3-5 years on O&M, Actvity wise (SPS, STP, Sewer net work, civil, mechanical, electrical etc)
Input Requirement |
Data Source |
Remarks/Design criteria |
Head wise (Staff, Power, repairs, chemicals etc) expenditure in last 3-5 years on O&M, Activity wise (SPS, STP, Sewer net work, civil, mechanical, electrical etc) expenditure in last 3-5 years |
ULB |
Revenue
Describe tariff and taxes if any for sewerage/sanitation. No of connections, New connection charges, head wise revenue collection and assessment during last 3-5 years. Who is competent agency to revise tariff and taxes. When was it revised last.
Input Requirement |
Data Source |
Remarks/Design criteria |
What is tariff and taxes if any for sewerage/sanitation. No of connections, New connection charges, head wise revenue collection and assessment during last 3-5 years. Who is competent agency to revise tariff and taxes. When was it revised last. |
ULB |
Low Cost Sanitation
Describe no of house toilets, no of houses without toilets, no. of toilets without septic tanks (this will indicate extent of open defecation and waste going to drain), whether suction machine for emptying septic tanks is available. Describe system of cleaning septic tanks. Describe no. of community toilets and seats, who maintains community toilets, status of maintenance,
Input Requirement |
Data Source |
Remarks/Design criteria |
No of house toilets, no of houses without toilets, no. of toilets without septic tanks (this will indicate extent of open defecation and waste going to drain), whether suction machine for emptying septic tanks is available. Describe system of cleaning septic tanks. Describe no. of community toilets and seats, who maintains community toilets, status of maintenance, |
ULB |