A total of 6. The effects on workers and visitors to the building had been a problem dating back to when the building opened. After the discovery, barrels of decayed, dried toilet waste were dug up and removed, the sewers were finally hooked up, and the illnesses disappeared.
Population had grown to 52, Water service was supplying approximately 2. Fearing lawsuits by property owners outside town, the city stopped the project after it crossed the Ohio Canal near the breweries and let it empty into the river at that point.
They did not know a superintendent would be necessary. The water and sewer line infrastructure continued to expand. The existing sewers conveyed wastewater and stormwater runoff to various discharge points throughout the city along these three stream segments.
It was estimated that 90 percent of the sewered areas discharged into the Olentangy and Scioto Rivers. With the marked increase in growth and associated wastewater discharges, records indicated that the pollution in Scioto River was becoming increasingly intolerable to the citizenry during the dry summer and early fall low flow periods.
Although this relieved the immediate stench downtown, the conditions south of town deteriorated to the point that the citizens brought their complaints to the Ohio Board of Health.
In addition to improvements to the collection system, he proposed that a sewage treatment works be built consisting of mechanical screening and double filtration at a rate of a half million gallons per acre a day, with a total treatment capacity of 20 MGD. The report further advised that two acres be constructed and operated for a full season to validate the design prior to fully developing the remaining 38 acres.
The report was based on investigations by Griggs and John W. Alvord, and attempted to assess solutions to the local needs in the context of the best English and American practices in regard to sewage treatment and disposal. It is a combined sewer system with outlets to Alum Creek and the Scioto River, untreated, creating a public nuisance.
Population has surpassed , City leaders appoint a sewer commission and Griggs is assigned as the Sewer Commission Engineer. As in the report, the commission recommends building a modern sewage works, but also offers a multiple septic tank holding system to provide 12 hours of detention time as a lower cost alternative.
Various bond issues to finance construction are pursued. Engineering as a profession is emerging and various capital improvement projects for sewers are planned or underway. The board approved the plan on July 2, , although there were reservations regarding the practicality of septic tanks based on the local conditions. No additional action was taken until a bond issue was put before the voters and approved in November Sprinkling filters had never been fully tested under severe winter conditions, and there were questions about their suitability in this application.
Recommendations from the evaluation presented in the Report on Sewage Purification dated November 10, , by George A. The Gregory paper describes the full wastewater and water program in great detail, credits the outstanding work of the sanitary engineering visionaries, including premiere figures of both national and local reputation in chemistry, plant operations, and engineering who participated in the program, and the paper contains technical discussion of the program by 25 such luminaries.
Among that discussion and comment were the remarks of Allen Hazen, who had done consulting work on the hydraulics of the Columbus program. Construction began immediately on the new treatment works located approximately two miles south of the existing outfall.
Although the east side station used natural gas combustion engines to drive the pumps, those at the main pumping station were originally driven by steam. Gregory, ASCE. Population is now , and miles of sewer exist. These results were achieved for the following costs shown in the Gregory paper:. A small pilot testing tank of approximately 35, gallons was constructed in and put into operation in Success of this tank led to construction of full size Imhoff modifications to the existing septic tanks.
Between and , other infrastructure improvements included replacing of natural gas and steam powered prime movers for both pump stations with electric motors.
Water consumption was in excess of Sewer infrastructure had increased to miles. This pollution should be stopped and we recommend that this be brought to the attention of the proper city, township, or county officials. Utilization of this sludge as a marketable fertilizer is now under investigation with the cooperation of the garbage reduction works.
Side-by-side comparisons were made with the previous one-day degree Celsius test. State Board of Health orders clean up of Scioto River pollution levels. Plans are drawn up for a new plant. Population increased and additional upstream sources of pollution increased reliance on the system as a primary means of treating wastewater. Solids handling was originally thought to mean temporary storage until such time that flow rates in the river were sufficient to allow for assimilation of the accumulated solids without malodorous impacts to the river.
Solids handling improvements and practices not included in the original plant were added. These included sludge drying beds and lagoon storage of sludge. The sewer system during this same period continued to grow, reaching Water usage had increased to an average of Only 19 employees are responsible for the treatment process at this time.
Population surpasses , The remainder of the year was spent evaluating equipment and developing operating methods. Solids handling consisted of eight anaerobic digesters, sludge drying vacuum filters and one multiple-hearth sludge incinerator. Treatment capacity was rated at 50 MGD. Unable to resolve this issue, the city cancelled the contract. In spite of this setback, water quality in the Scioto River downstream of the wastewater plant showed a marked improvement with regard to dissolved oxygen and BOD 5 biological oxygen demand over the upstream sampling station, documenting the effectiveness of the new treatment process.
Solids handling remained an issue at the plant as solids disposal equipment deteriorated. Digestion was used to reduce the volume of solids requiring disposal. The digesters had problems with their heating coils as well as cracks in the concrete lids due to overfilling.
Incineration was the preferred method of sludge disposal. The challenge, then as now, was the severe operating conditions for the incinerator caused by widely varying temperatures, sludge feed rates and moisture content. The recommendation was that supplemental incineration facilities were needed if complete disposal of residuals was to be accomplished by incineration. This deposit gradually builds up to the point that the capacity of the equipment is greatly reduced.
It is therefore necessary, in the absence of any known positive method of preventing this deposit, to periodically dismantle the equipment and clean it up.
The filter surfaces or screen is cleaned by dissolving the deposit by means of an acid bath, but piping must be cleaned by hand, drilling, chipping, vibrating or other methods being used to clean same. The grit removal system was modified to help distribute flows equally across the chambers and the grit collection mechanism required a considerable amount of repair and replacement work. New mechanisms were to be installed in Gas-powered diesel engine generators were operated more efficiently, burning digester gas and supplemented by a new natural gas supply line to keep them running during periods of low digester gas production.
To reduce dependence on city potable water and improve operation economy, a well water supply system was installed for all purposes other than human consumption. New screens were installed, which eliminated one of the original design constraints in the original plant. Nonetheless, problems persisted with grit deposition in the lower reaches of the OSIS immediately upstream of the influent pump station. The plant still remained handicapped with grit removal problems, due to these design difficulties.
Modifications were made, and 1, tons of grit were removed for the year. New thickening centrifuges were installed to thicken waste activated sludge. Training issues and reliability of equipment limited operation to eight hours per day. From the annual report:. We have been forced to the use of substitute materials in some cases and have also had to adapt ourselves to the necessity of turning more and more toward manufacturing, in our machine shop, the parts which we can produce out of salvaged materials.
General plant issues: The main condition now to be corrected is one of bad drainage on the roadways about the plant. It is hoped that ultimately gutters and curb can be installed throughout the roadway system and sufficient slopes provided for proper run-off. It is folly to add to or augment the capacity of the sewerage system when the present treatment facilities are inadequate to handle the resulting increased flow.
The demands on the treatment plant continued to increase and by late , parts and supplies were still on backorder from Attempts were made to flush the material out of the sewer during the construction work, but were unsuccessful.
This outage required the plant to be off-line for the last two months of and the first five months of A new diffuser system was installed in the aeration tanks replacing the original fixed, porous-plate ceramic diffusers with swing diffusers, because the latter could be removed and serviced individually without the necessity to take an entire aeration tank off-line for an extended period.
Modifications to the vacuum filtration system were made, and the existing multiple-hearth sludge incinerator furnace had a failure necessitating an unscheduled shutdown. A weigh belt system was designed to help quantify the volume of sludge being incinerated. The collection system was Improvement plans were being developed to further expand the plant to bring capacity up to 80 MGD.
Construction of a new digester system continued in the solids handling portion of the plant. Additional problems arose in both the sludge filtration section and incineration sections, requiring extensive rebuilding and overhauling of equipment including major refractory work. The collection system was at Nearly persons are employed in the new division. Most of the capital improvements projects begun in had been completed. Those projects included grit collectors, modifications to air diffusers, modification to primary tanks, and extension and enlargement of the power generating station.
This work allowed the plant to increase treatment capacity from a maximum of 50 MGD to a peak flow of approximately 80 — 85 MGD. Average daily dry weather flows were typically in the 65 — 70 MGD range. Rain events of greater than. Full usage of the completed work is dependent upon future additional treatment improvements to keep up with the rapidly expanding city.
The solids handling section was plagued by refractory repairs and rabble arm failures. The existing vacuum filtration system had additional components wearing out. Further modifications to dewatering and to the incinerator, as well as a proposal to install a new, additional incinerator were identified. Again, funding availability for the proposed improvements would dictate if and when the work would commence.
The population of the service area surpassed , The plant was severely overloaded during wet weather, and bypassing a portion of the wastewater flow was practiced during high river stages. During dry summer months, the plant treated all flow. A New Approach Columbus has developed a new approach to eliminate sanitary sewer overflows. Instead of simply storing excess water that seeps into the sanitary sewer system when rain falls and snow melts, Blueprint Columbus addresses the source of the problem.
Blueprint Columbus Blueprint Columbus takes all of the regulatory challenges of complying with the Clean Water Act into consideration and uses green infrastructure to meet these challenges and efficiently achieve water quality goals. Get Your Garden in Full Bloom with Com-Til Com-Til products are organic fertilizers and soil conditioners used for mulching, gardening, potting, transplanting and breaking up tough, clay soil. It is one of the best-kept secrets for improving soil health, growing a greener lawn and getting your garden in full bloom.
Walk-in Payment Office: Weekdays am - 5 pm N. Customer Service Phone: Weekdays 7 am - 6 pm Email: [email protected]. The CEPT facility will provide an additional million gallon per day MGD treatment train that will provide raw sewage pumping, screening, grit removal, chemically-enhanced primary clarification utilizing ferric chloride and polymer, disinfection, de-chlorination, and conveyance to the existing outfall structure.
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