Vilappilsala Leachate Treatment by Biomethanation Bound to Fail Long-Term

Existing leachate lagoon - where is the liner?

Nepal is so isolated in so many things, and presumably unable to engage top international advice, that it should engender sympathy for their struggle. Here is another example of that in the area of leachate treatment. They are intending to use Leachate Treatment by Biomethanation, which of course long term won't result in a leachate which is low enough in ammoniacal nitrogen to discharge safely either into a watercourse or even into a sewage works for further treatment. Plus, it won't protect their water supplies at all.

In any event if they have a lined landfill they will get Leachate Treatment by Biomethanation free, within the landfilled waste. They should be collecting the much larger yield of landfill gas from the landfill itself anyway, and if CDM is resurrected, they should be able to get Carbon Credits for that landfill gas to build their LFG extraction project.

They will in the end realise that they must treat their leachate aerobically in order to reduce the highly toxic ammonia component, and although biomethanation is fine if it. In order that you can follow this story I have quoted most of the article below. But, do follow the original article link below for the full story:

The agitation against the Vilappilsala solid waste treatment plant heads to another deadlock, the city Corporation is on a last-minute bid to operationalise a Leachate Treatment Plant (LTP) under construction there.
Leachate from the plant seeping into the nearby Meenambally canal and the resulting ground water pollution in the area has been among the main causes of concern for people of Vilappil panchayat and the Vilappilsala Janakeeya Samithi.
Despite the intensifying agitation and interventions by several authorities, including the Ombudsman for Local Self Government Institutions, the city Corporation has not been able to complete the work on LTP, more than a year after its deadline.
Apart from the 3,500-metre-cube collection tank and anaerobic pond, the construction of six other component tanks of the LTP is yet to be completed. However, instead of waiting for the completion of the whole project, the Corporation is now trying to direct and store leachate in the completed collection tank as a temporary measure to tackle water pollution.
On Monday, a team of engineers and officials from the Kerala Sustainable Urban Development Project (KSUDP) Project Implementation Unit of the Corporation visited the plant to assess how leachate from the accumulated garbage and various other points in the plant can be channelled into the LTP collection tank.
“Construction of the collection tank is over and leachate can now be stored in this tank. From here, it will be directed to the anaerobic pond where bio-methanation of the liquid will take place. The bio-filters in the pond will be installed within a week by which time we will also be laying pipes to channel leachate to the collection tank,” a project engineer said.
He said the bio-methanation process in the anaerobic pond, in its full capacity, will take around 70 days within which period other works on the leachate treatment plant would also be completed.
The LTP coming up at Vilappilsala follows a seven-step treatment method at the end of which the Biological Oxygen Demand in the waste discharge will be brought down to 30 mg per litre from 5,000 mg per litre. Corporation officials now say that the leachate treatment plant will be made fully operational by January, 2012. “Before that, we will solve the issue of water pollution,” said Deputy Mayor G. Happy Kumar.

While Leachate Treatment by Biomethanation will certainly reduce the Biological Oxygen Demand it won't reduce the ammoniacla nitrogen which is essential to remove to below 5 mg/l, and 7 steps seems excessively complicated for any leachate treatment plant. At some point they will need a simple SBR aeration leachate treatment plant of the type I have designed more than 30. (See http://leachate.co.uk for more information.)

Corporation Health Officer D. Sreekumar said the leachate treatment plant coming up at Vilappilsala would only be the second such plant in the country. “Nashik is the only municipality in the country to have an LTP of this magnitude and capacity. The lack of prior experience was also a reason for delay,” he said.

Keywords: Leachate treatment, leachate Treatment by Biomaethanation, agitation, solid waste treatment plant
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Phase II of landfill closure to begin - Crossville Chronicle

CROSSVILLE — Commissioners on the Environmental Committee authorized its engineer to proceed with the construction documents for the partial closure on the second half of the county's class one landfill.

Ronnie Reese, environmental engineer for Cumberland County's landfill, told commissioners serving on the Environmental Committee that phase 2 of the landfill closure for class one municipal waste and household garbage was almost full and it was time to proceed with closure preparations.

"You need to decide what you want to do with this, but I would recommend filling until the end of the month and compacting that down as much as possible and placing a temporary cap of one foot top cover to prevent so much water getting in creating as much leachate," Reese said.

Leachate is the byproduct or waste water that is drained from the bottom of the landfill. The liquid has to be taken to a treatment facility.

Once the landfill is closed, the county is scheduled to begin using a transfer station method through Cumberland Waste Disposal, a Waste Management company.

"Is the county ready to go to the transfer stations? I mean, when's the D-Day on that?" Jeff Brown, 8th District commissioner asked.

"I'm not sure," Reese said.

"The contracts and everything is in place on that. Basically, it's when we call them and we're ready and they'll start," Cumberland County Mayor Kenneth Carey said.

"You don't want to start a complete closure at this time in the year. It's up to you and you have to make the decision. But I'd recommend doing the temporary cover now and going ahead with the complete closure in spring," Reese said.

"If we do a temporary cover and wait till spring, will that affect the bidding?" 9th District Comissioner Carmin Lynch asked.

"Yes, it will. You're better off to wait on the bidding because of the plastic liner, it is based on oil prices and it can go up and down like a yo-yo. There's already a portion of it there ... You'd be better off to contract for a partial closure now with a temporary cap and then a permanent cap in the spring for the complete closure. I can have the paperwork and specifics ready to get to Nathan (Brock) and it should be ready to go out to bid in a few weeks," Reese said.

"Will we still have to deal with all the leachate?" 7th District Commissioner Mike Harvel asked.

"Yes, but it won't be anything like the amount we have had with the landfill open and running. I don't know a real figure for sure, though," Reese said.

Commissioner Lynch, who is not a member of the committee, but attended the meeting, reminded commissioners that phase one of the landfill closure was built into the budget, but phase two was not and the debt would have to be issued to have the figure and leachate would be a big factor.

Robert Safdie, 2nd District commissioner motioned to authorize Reese proceed with the documents to start with the partial closure on phase two with a temporary cap.

Terry Carter, 6th District commissioner, supported the motion and it was unanimously passed.

Reese updated commissioners on the status of the remainder of the class three-four landfill and said it could run until the summer of 2011. Reese said the area on top of that landfill was flat and could possibly be extended to go higher up with construction and demolition waste, but it would require a modification to the permit that would have to be submitted to the state.

"This would be considered a major modification if we wanted to extend it like that. You'd have to go through public meetings and a hearing process," Reese said.

He estimated it could extend the life of the class three-four landfill another four years.

"If you don't want to extend it, then we're looking at next summer for closure on that," Reese said.

Darrell Franklin of Faye Portables attended the meeting and addressed the committee stating they would be willing to transport up to 100 tons per day of ceramic tile to the class three-four landfill for a reduced rate.

The current rate is $30 per ton, but Faye requested a rate of $15 per ton since they would be bringing in such a large quantity on a daily basis.

"We'd be looking at around 100 tons per day. It could be more or less, but it's available now and it would be good for both of us. It could give you added revenue for your landfill costs," Darrell Franklin said.

He added it would be approximately 80 percent tile and 20 percent demolition combined.

"It would greatly accelerate the rate of our landfill closure, but it won't take up the volume as regular C&D waste," Mayor Carey said.

"Well, it would fill quicker and you've got to consider if we give these guys a reduction then our own people who elected us into these positions, our local contractors are going to want a discounted rate for bringing their stuff," said 7th District Commissioner Roy Turner.

"It wouldn't make any sense to do the discounted rate just to break even and fill the landfill up faster. It's something we've got to study," Brown said. "We'd need some kind of a contract to do this, too."

Commissioners said they would have to look at the proposal to consider and get some estimates from Reese on much it take in ceramic tile to fill the landfill and how much the extension would cost if they were to consider having it constructed.

"It's not something we can answer tonight. It's something we're going to have to look at and get back after we get some estimates," Brown said.

View the original article here