Operation & Maintenance of the Delphos MBR WWTP. Presenters: Scott Ellsworth, P.E. Keith Radick Floyd Browne Group Kim Riddell City of Delphos WWTP

Transcription

1 Operation & Maintenance of the Delphos MBR WWTP Presenters: Scott Ellsworth, P.E. Keith Radick Floyd Browne Group Kim Riddell City of Delphos WWTP

2 Background

3 Background Previous & Existing Facilities Trickling filter facility with tertiary sand filtration Existing structures built in 1931, 1954 and % Combined / 30% Separate System 13 lift stations and two storm ponds Population of 7,000 people / population equivalent of over 50,000 people

4 Background WWTP Facility History Non-compliance dating back to 1996 Progressive failure to meet NPDES permit limits Administrative failure to complete specific studies required by permit Industrial Component Chef Solutions 3000 mg/l CBOD 5 limit Lakeview Farms 3000 mg/l CBOD 5 limit Bunge North America 1000 mg/l CBOD 5

5 Background

6 Background Footprint Area Comparison Between an Oxidation Ditch and an MBR WWTP

7 Background New MBR Plant Specifications Design Average Daily Flow 3.83 MGD Design Peak Flow 12 MGD Average Dry Weather Flow 1.5 MGD Average Annual Flow 2.8 MGD Current Loadings 450 mg/l CBOD mg/l TSS Varies according to holidays

8 Plant Design Plant Design Must have good QA/QC SOP s (Standard Operating procedures) Engineers & Operators keep a wary eye out for discrepancies in the design and plan Communicate with EVERYONE in the design process whenever any change is made Keep plant personnel involved throughout construction

9 Start Up Special biosolids required for startup Samples were taken from two local WWTP s & Delphos trickling filter Van Wert WWTP won the honors Trucked in 300,000 gallons of 1.5% mixed liquor for initial startup Augmented with the old Delphos WWTP biosolids once process was established

10 Start Up Trickling Filter AND Membrane Bioreactor Old and New

11 Start Up

12 Start Up Blower pop-off s solved by communication between vendors, engineers, and plant operators

13 Initial Operation What are we going to do with all this WAS???

14 Initial Operation Or was it ??

15 Initial Operation Operation Factors Staff Commitment Special Operations and Overtime Needs of the new plant do not negate the everyday nonplant duties Home life concerns Staff Training Outside work hours Temporary Staffing for times during work hours Innovative Solutions

16 Initial Operation

17 Initial Operation

18 Initial Operation Construction Costs Estimated to be $31,890, Actually $30,146, Budget Considerations Jump in overtime budget due to Startup New plant operations (shakedown) Training Chemical Budget MBR Cleaning needs Special cleaning requirements due to startup conditions Polymer to assist membranes during cooler temperatures Special Equipment to apply chemical

19 Operation Costs (estimated) 2007 Operating Budget Estimated to be $1,515, Split 2/3 MBR Operation 1/3 ATAD Operations Utility Costs Initial Operation Electrical costs can be as high as $35, per month Load meter type billing

20 Laboratory Data CBOD 5 - < 2.0 mg/l TSS - < 1.0 mg/l NH 3 - < 0.2 mg/l PO 4 - < 0.4 mg/l Mercury - < 0.8 ng/l mercury variance will be dropped Toxicity / Bioassay below detect first passing analysis in over 5 years on acute and chronic

21 Laboratory Data Delphos Effluent Values When did the Delphos Plant go online? Jan-06 Feb-06 Mar-06 Apr-06 May-06 Jun-06 Jul-06 Aug-06 Sep-06 Oct-06 Nov-06 Dec-06 Jan-07 Feb-07 Mar-07 Apr-07 May-07 Jun-07 Jul-07 Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 CBOD5 (mg/l X 10) NH3 (mg/l) Hg (ng/l)

22 Project Completion

23 O&M Manual Operation & Maintenance Manual Characteristics Easy to handle Easy to Read Easy to Locate Easy to find the object of interest Separate into Logical Manuals Headworks Secondary Treatment Digester etc.

24 O&M Manual Keep manuals in several places around the plant Keep the Headworks manual in the headworks building Don t keep so many that they cannot be updated easily Organizational format should be the same for all subjects Description of Process Operation of process Troubleshooting Alarms General maintenance Reference to manufacturer s O&M manual

25 O&M Manual Avoid the Confusion of Different O&M Versions Keep an Electronic copy of the original O&M in a safe place (network server frequently backed up) Make one Official editable copy and password protect Assign one individual to be in charge of all changes for consistency Review one copy as a group or route it through the appropriate staff. Others will see proposed changes and have a chance to comment

26 O&M Manual Keeping Your O&M Manual Alive Update the Manual Frequently Make it a Team effort Make the O&M a part of new employees orientation Use the General Maintenance Section daily by copying the spread sheet or migrating on to a software system that will track maintenance and generate work orders Keep new routines or methods of operation listed in the O&M Write in it on subsequent edits! Use the O&M as a review tool Incorporate the O&M manual in the operator s daily routine

27 Questions & Comments Scott Ellsworth, P.E. Keith Radick 450 Grant Street Akron, Ohio Kim Riddell Wastewater Superintendent