The Top 5 Tips On Leachate Treatment by Short Rotation Willow Coppicing

Many people face different challenges daily. Lots of people are called on to to deal with the challenge of leachate treatment by short rotation willow coppicing. Some apparently breeze through it, succeeding easily. Some do not ever succeed, although they try quite hard. Exactly why is this? Why is it that way? Exactly what are the key components that pre-determine probable success or failure? Which are the keys to finding yourself in that group that are going to enjoy success?

The true secret to success is in the planning, in identifying all important tasks beforehand. When you have an approach, once you know how, it is not difficult! And so, are you really serious about leachate treatment by short rotation willow coppicing? Why then you will want to get yourself "a track to run on", and know very well what it takes, up-front. In a nutshell, you'll want to acquire understanding of precisely what is involved and why it is important.

Let us discuss the 5 most essential things to know/steps to consider adopting to be able to succeed at leachate treatment by short rotation willow coppicing:

1. Short rotation willow coppicing which is often called SRC is a sustainable and low cost method for leachate treatment, but it will only ever be suitable for a very limited number of landfills. So why might this be important? The reader of this article should not run-off and assume it will be suitable or even approved by the regulatory authorities for his landfill site. So if I follow this route what is going to happen? A small proportion of landfill site owners will find that they can obtain cheap leachate treatment and disposal, while at the same time obtaining good green credentials for operating a sustainable energy efficient leachate treatment method.

2. The SRC method is based upon the irrigation of leachate into the willow crop only during periods when there is a soil-moisture deficit and this is mostly only during the summer months. That'll be apt to be important since the Environment Agency will expect that the irrigation only takes place when there will be a benefit to the crop from the nutrients in the leachate and those nutrients and all other contaminants must not run-off to pollute water courses nearby. And also, because if there is no benefit to a crop then the process is one of waste processing and not one of growing a valuable crop which will have willing buyers keen to use the chipped wood for a valuable purpose, such as heating homes and schools.

3. A successful application for a SRC method to treat leachate will have to tackle the problem of salinity build-up from leachate (which naturally has a higher than normal salt content) irrigated during the dry months. This is because if salt builds up in any soil the point will eventually be reached when it becomes too saline to support the willows. Controlled salinity flushing in wet weather in each autumn/ winter is essential for this method and it must be achieved without raising the salinity of nearby watercourses significantly at all. Those proposing SRC for leachate treatment must always have a "flushing method" or work-around for this problem, in their project. This could certainly also be a wise idea because the EA will normally expect this to be a problem considered and solved (at least in theory) before any submission for modification of the Environmental Permit can be passed.

4. The growing and harvesting of the short rotation coppicing can be sub-contracted to a local farmer. Alright, so what is really important about this? Most landfill operators don't posses the right equipment, or the trained staff, to undertake the farming work involved in cropping and chipping the SRC. Will there be some other reason? Some of the plant such as the willow coppice harvester equipment that most UK SRC use, is highly specialist and only used once every 3 years when the coppice shoots and foliage reach an optimum size/yield, and thus is equipment best hired rather than bought.

5. Leachate still, even from the most modern and highly controlled landfill sites, contains some additional trace quantities of metals, and like the salinity these must not be allowed to build up in the site. This means that they must be regulalrly monitored in most cases. And why might this become a good plan? As monitoring will normally show no measurable build-up for modern MSWs. What other reasons do you have back this up? The healthy appearance of the growing plants.

If you happen to really want to succeed at leachate treatment by short rotation willow coppicing, simply observe the above 5 steps. Then succeed and enjoy all of the benefits, enjoyment and fruits that go with your success. Disregarding them will set you up for sub par results. A lot worse results than might possibly otherwise be yours.

Discover some ways to understand leachate treatment by short rotation willow coppicing at our willow leachate treatment web site at leachate.co.uk/main/leachate-treatment/willow-coppicing-for-leachate-treatment.

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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Lagoon Treatment of Leachate Added by Bi-County Solid Waste Management

Bi-County Solid Waste Management expects to save up to $20,000 each month with the help of its latest step toward self-sufficiency.

The Montgomery County landfill's executive director, Pete Reed, said the majority of leachate, or contaminated water, on the site will eventually be treated in the lagoon that began holding water after the May 2010 flood that shut down Clarksville's wastewater treatment plant.

"They had to put a permit on us and start charging us $9,000 to 10,000 a month, but if we had a parameter that goes above, then we had ... surcharges that could be an additional $15,000 in that month," said Reed, who added that the landfill went above that parameter 2-3 times a year.

As those costs started to build, along with the high costs of hauling the leachate off the site, Reed said the decision was made to create a $750,000 system featuring the lagoon that holds 1.3 million gallons and will be able to decontaminate the water over a 30-day period.

Three separate pools hold the water that is pumped in from various locations throughout the site. The two pools with a white foam layer on top are anoxic zones, meaning aerators pump in oxygen, while the middle pool is anaerobic, with a pump that puts in a different mixture of chemicals.

Beginning in May of this year, Reed said micro-organisms that are trained to eat ammonia and other chemicals were added to help treat the water by releasing the nitrates and taking out any odor. Although Reed said the pools have reached the optimal amount of the "bugs" that come from Paris, Tenn., it will still be a few months before the system is fully operational.

Reed said the lagoon has already ensured the landfill won't go beyond its monthly parameters at the wastewater treatment plant, and eventually the treated water will overflow into a clarifier that will filter out the sludge and transport the clean water to a 7 million gallon holding pond adjacent to the lagoon. That water will be used for irrigation on the grass at the site, as well as the nearby woods and, if it's clean enough, into local streams.

Depending on the season, Reed said the system could put out about a million gallons each month. Before it can be used for irrigation or anything else, several samples of the water will have to be approved by the state.

Even with the new system, some leachate will still go to the wastewater treatment plant, but the cost of the permit and the manpower required will be reduced significantly. Reed said he doesn't expect the loss of income from the landfill to have much effect on the plant's bottom line, since it's expanding and gets plenty of money from industrial sources.

"We hope that by this time next year, we'll be pretty much self-contained," Reed said. "Nothing will have to go out, other than (recyclables)."

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Ultrafiltration and Reverse Osmosis for Landfill Leachate Treatment - Environmental Expert

Lanchester Landfill serves Eastern Lancaster County and Western Chester County in PA for disposal of household and construction waste. The facility produces around 10,000 gals per day of  leachate.

The Problem

The facility ran a single basin sequential batch reactor (SBR) and a filter press to dewater the solids for many years, but found that they first, could not sustain a good biomass, and second, in winter could not nitrify the ammonia. The facility therefore could not reliably sustain the average monthly discharge requirements:

Evaluation

The purpose of the new system is was meet the discharge requirements consistently. Ultrafiltration and Reverse Osmosis technology was selected since this offers the best performance possible in the smallest footprint with a low capital cost.
The Solution

The existing SBR basin was converted to an equalization basin, and Dynatec provided and installed a prefilter to remove larger solids, an ultrafiltration system to remove fine colloidal solids and oils, a reverse osmosis system to remove TDS, and ammonia and the other dissolved components of concern.

Several tanks already in place were utilized as process and buffer tanks between the various treatment stages.

Final ph control and chlorination was also provided.

The Process

The leachate is equalized in an equalization basin. A filter removes large solids before it enters the UF process.The leachate is processed with ultrafiltration to remove particles and oils.The UF permeate is processed with Reverse Osmosis to remove dissolved materials.

Operation

The system has operated successfully for over five years, allowing the plant to meet its discharge permit on all parameters. The influent and effluent data are provided below.

Conclusion

Dynatec Systems has built on its water treatment experience that began in the 1970's using membranes with rugged industrial reliability to produce UF and RO systems wrapped in a compact package. This made Dynatec the right choice for this project. The successful implementation of this system allows this landfill to continue to discharge to the local POTW and for use for dust control on the facility’s roads.

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Flocculation and Precipitation For the Treatment of Landfill Leachate

Flocculation and precipitation has often been proposed as a low cost and simple to implement process for municipal solid waste landfill leachate treatment. It is also a natural first thought for anyone new to leachate treatment that the combination of these two processes might be a very effective treatment combination, as they can be for certain other types of contaminated water.

The purpose of flocculation is to form flocs of particles that settle quickly. Generally , flocculation follows coagulation to get rid of colloidal (floc) particles quickly through rapid settlement.

These particles have dimensions in the region of one nm-1 m, and are distinguished by a abnormally large surface area. As an effect, they are very susceptible to surface forces. During coagulation, colloidal particles are destabilized to improve their ability to merge into bigger particles and then this speeds up their removal by gravity. Destabilization is helped by way of chemical reagents ( coagulants ) which are chosen to be minimize repulsive forces thru neutralization of electric charges present in colloidal particles ; this occurs by way of bonding or adsorption mechanisms.

All these points it is necessary to consider concern hydrophobic colloidal particles, for which stabilization derives from negative electrical charges. The more common coagulants are Aluminium Al), and Iron (Fe ( III )) salts, which are identified by multivalent ions with opposite charges.

These salts have an acid behaviour and, therefore, change the physico-chemical traits ( pH, alkalinity ) of wastewater. Their potency relies on the alkalinity of wastewater. Polymeric organic compounds ( polyelectrolytes ) are also often used as coagulants due to their capacity for charge neutralization ( cationic polyelectrolytes ) and to extend bridging between particles. The merger of destabilized colloidal particles is augmented by controlled stirring, and is further helped by addition of categorical chemicals ( 'flocculating agents' ). Among these, turned-on silica or clay ( inorganic flocculants ) and polyacetate ( organic flocculants ) are principally made use of.

Likewise , Al and Fe salts also behave as flocculants, since their low solubility permits rainfall with floe merger and concomitant capture of colloidal particles by electrostatic action or adsorption. Coagulation / flocculation is in a position to reduce colloidal suspension which is partly in charge of turbidity and color.

Also, organic substances, principally those with the larger range dimensions ( about one nm ), are concerned in the flocculation process, because they are adsorbed in the flocs and successively removed thru gravity settling.

Commonly, the term 'precipitation' is used to describe the phase that straight away follows flocculation, and, also, to the formation of insoluble compounds got by adding reagents which shift the chemical equilibrium towards the insoluble form of the compound or the elements which need to be removed.

Precipitation is principally applied to metals removal ( particularly heavy metals ), with metal hydroxide or metal sulphide formation, or phosphorus removal by formation of insoluble compounds with cationic metals, including Al or Fe coagulants. Many experimental studies utilizing coagulation / flocculation for the removal of organic substances from raw leachate have been conducted, essentially in the 1970s.

Salts of Aluminium and Iron together with lime were principally made use of as precipitation agents. Results were adverse, as COD removal potency lower than 40% was noted. The reason behind these low efficiencies can be ascribed to the incapacity of the method to get rid of substances aside from molecules of large dimensions and high molecular weight.

It was concluded that, higher treatment potency is possible but just for 'old leachate' ( with low BOD / COD ratios ) or for biologically pre-treated leachate. In fact it is most often needed for 'young leachate' (acetogenic leachate) which is distinguished by high levels of volatile trans-acids, i.e. small dimensions and only a little in the way of precipitable molecules, so that the removal involves only a minor fragment of the total of organic compounds in raw leachate.

Researchers also cite many other drawbacks like the rise of salt content and the low potency of ammoniacal compound removal. This last is almost always the final concern which rules out the use of this process in the minds of most leachate treatment experts.

OK. So we have told you the disdvantages. What are the alternatives? To find out how leachate treatment can be achieved without the problems cited here visit the leachate web site for all you need to know about garbage juice. If you still need a suitable reagent for this method go to the flocculant supply web site.

Portable wastewater treatment plant to treat landfill leachate in Mexico - Water World

TORONTO, ON, Canada, Apr. 26, 2011 -- Under an MOU with Hasar's Grupo Ecologico, Blue Gold Canada plans to install a wastewater treatment plant at a landfill in Guadalajara, Mexico.

The Blue Gold/Dove Biotech wastewater treatment plant will have the capacity to treat 50,000 liters of water per hour and will use a proprietary organic/natural solution called CWP-121 to remove the contamination from the leachate pools. The treated effluent will then be used for agricultural applications.

The project is scheduled to be installed later this year.

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