Vilappilsala Capacity of garbage plant inadequate

Leachate from yard frequently reaches the Karamana river

The garbage plant at Vilappilsala can effectively process only a portion of the solid waste that reaches the yard from the capital city, a report submitted by the Kerala State Pollution Control Board (PCB) to the High Court of Kerala has observed.

The plant has the capacity to process only 90 tonnes of solid waste a day.

The average quantity of waste reaching the 46-acre plant daily, until it was shut down on December 21, 2011, was around 203 tonnes, of which 114 tonnes was biodegradable waste, according to the report.

PCB environmental engineer K.R. Santhoshkumar and advocate commission K. Meera were tasked by the High Court to inspect the plant and report the facilities there.

The report further observed that the leachate flowing from two uncapped landfills inside the plant frequently reached the Karamana river through the Meenambally canal, causing river water pollution.

Although the leachate is collected in temporary ponds and treated using alum, lime and bleaching powder, these temporary measures were inadequate to check the pollution caused by the leachate.

The PCB has in its report directed the City Corporation to commission the permanent leachate treatment plant under construction inside the plant within 60 days.

The board has recommended the construction of a dike between the landfills and the stream to prevent flow of leachate into the river.In order to control the stench emanating from the windrow composts in the plant, the PCB has recommended frequent turning of windrows or providing forced aeration. As of now the windrows are turned every five days.

Another recommendation to control the stench was providing sufficient ventilation by providing adequate number of air blowers and bio-filters.

The PCB report also makes a set of recommendations for maintaining the general hygienic conditions inside the plant.

Providing a 100 meter buffer zone around the periphery of the plant is among these.

Ensuring source level segregation of plastic and biodegradable waste and transporting garbage to the plant in covered vehicles with leachate collection facility are among the other recommendations.

The PCB report has directed the Corporation to complete all the recommended modifications at the Vilappilsala plant within 60 days.

View the original article here

Ground-water hydrology and the effects of vertical leakage and leachate migration on ground-water quality near the Shelby County landfill, Memphis, Tennessee (Water-resources investigations report)

Disposing of solids waste to landfill is regarded as one of the most economical means of handling waste though landfills pose pollution threat to both ground and surface water resources. However, landfill liners and good landfill management practices may reduce the impact of water contamination by landfills.

The above video is not associated with the article text. However, we thought our readers might also be interested in this video.

Chemical analysis of groundwater beneath and near two landfills from New Zealand and Lesotho (in Southern Africa) showed that there are higher concentrations of chemicals such as Chlorides, TDS and COD than average. The water was also found to contain higher amounts of heavy metals.

High concentrations of chemical constituents, such as those found in leachate contaminated water may cause various health complications in humans if consumed.

To minimize possible hazards due to landfill leachate, future landfills must be lined at the base and sides by a combination of clay, geosynthetic clay and high-density polyethylene liners.

Click here to buy from Amazon

Comparison of four leachate-generation procedures for solid waste characterization in environmental assessment programs (Interagency energy/environment R&D program report)

FROM THE PREFACESanitary landfills are the most widely utilized method of solid waste disposal around the world. With increased use and public awareness of this method of disposal, there is much concern with respect to the pollution potential of the landfill leachate. Depending on the composition and extent of decomposition of the refuse and hydrological factors, the leachate may become highly contaminated. As leachate migrates away from a landfill, it may cause serious pollution to the groundwater aquifer as well as adjacent surface waters. There is growing concern about surface and groundwater pollution from leachate. Better understanding and prediction of leachate generation, containment, and treatment are needed.

This book contains a literature review of various methodologies that have been developed for prediction, generation, characterization, containment, control, and treatment of leachate from sanitary landfills. The contents of this book are divided into nine chapters. Each chapter contains theory and definition of the important design parameters, literature review, example calculations, and references. Chapter 1 is devoted to basic facts of solid waste problems current status and future trends towards waste reduction and recycling. Chapter 2 provides a general overview of municipal solid waste generation, collection, transport, resource recovery and reuse, and disposal options.

The current status of sanitary landfill design and operation, problems associated with the landfilling, and future trends are presented in Chapter 3. Methods of enhanced stabilization, recycling landfill space, methane recovery, and above grade landfilling, and closure and post closure care of completed landfills are also discussed in detail. Chapter 4 provides a general overview of Subtitle D regulations and its impact upon sanitary landfilling practices. Chapter 5 is devoted entirely to moisture routing and leachate generation mechanisms.

Examples of calculation procedure for determining the leachate quantity produced at a landfill are presented. Chapter 6 is devoted to chemical characterization of leachate that changes over the life of the fill. Both theoretical and experimental results are provided to estimate the leachate quality. Chapter 7 provides leachate attenuation processes and mechanisms.

Chapter 8 is devoted to leachate collection systems. Natural soil sealants, admixed materials and synthetic membranes, their effectiveness, and methods of installation and economics are fully discussed. Chapter 9 provides a detailed review of leachate treatment methodology. Kinetic coefficients and treatment plant design considerations are summarized for the sole purpose of assisting con- sultants to design leachate treatment facilities. Leachate treatment case histories and numerous process trains are presented for treating leachate from young landfill. The book also describes how the process train can be changed effectively as leachate quality changes with time.

Price:

Click here to buy from Amazon

Potential for using constructed wetlands to treat landfill leachate: Literature review and pilot study design (Special report series)

This digital document is a journal article from Ecological Engineering, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Four surface-flow mesocosm wetlands were operated at different hydraulic retention times during two periods to treat diluted woodwaste leachate that was acidic, of very high oxygen demand, and toxic. Temperature, dissolved oxygen, and redox potential decreased with increasing water depth. However, there was no significant vertical variation in microbial biomass. No significant development in biomass of planktonic microorganisms was found over 6 weeks of initial operation. It took <1-6 weeks for maturation of the biofilm on submerged plant surfaces and the sedimentary microbial community. Mass reduction efficiencies of chemical oxygen demand, and tannin and lignin increased significantly with hydraulic retention time when 10% leachate was fed with tap water. When a more recalcitrant influent was fed, there was a slight increase of reduction efficiency with increasing hydraulic retention time. Reduction rates increased linearly with mass loading rates up to 0.4kgm^-^3d^-^1 chemical oxygen demand and 0.13kgm^-^3d^-^1 tannin and lignin. Precipitation and evapotranspiration had profound impacts on the overall performance and its variability. Mass balance-based operating data of wetlands with a mature microbial community are required for proper performance assessment. formance assessment.

Price:

Click here to buy from Amazon