Pengaruh Ukuran Dan Fraksi Organik Terhadap Kuantitas Dan Kualitas Timbulan Lindi

Timbunan sampah pada landfill (TPA) akan mengalami degradasi dan akan menghasilkan cairan (lindi) baik kuantitas maupun kualitasnya. Kuantitas dan kualitas timbulan lindi dari sampah perkotaan akan dipengaruhi oleh beberapa faktor seperti: komposisi dan karakteristik sampah, kadar air, umur sampah dan kondisi cuaca (iklim). Pada kegiatan studi ini bertujuan untuk mengetahui pengaruh komposisi sampah (jumlah fraksi organik) dan karakteristik sampah (ukuran butiran) terhadap karakteristik timbulan lindi.Dalam rangka untuk mendapatkan tujuan studi, maka metode yang diterapkan adalah melakukan percobaan laboratorium menggunakan reaktor biodegradasi volume 1500 mL. Dalam percobaan ini digunakan dua kelompok reaktor yaitu; kelompok pertama, digunakan untuk pengujian pengaruh persentase fraksi organik, sedangkan kelompok kedua dimaksudkan untuk pengujian pengaruh ukuran butiran sampah terhadap karakteristik lindi.Sebagai parameter kualitas lindi ditentukan TSS, BOD, dan COD, sedangkan parameter kuantitas lindi adalah volume cairan yang keluar dari reaktor. Berdasarkan hasil percobaan diketahui bahwa jumlah (persentase) fraksi organik dan ukuran butiran sampah dapat berpengaruh terhadap karakteristik timbulan lindi. Secara keseluruhan konsentrasi TSS, BOD, dan COD semakin besar sejalan dengan bertambahnya persentase fraksi organik. Hal yang sama terjadi untuk ukuran butiran samaph semakin kecil, maka TSS, BOD, dan COD semakin besar. Adapun volume timbulan lind

Urban Infilling Impacts On Florida Solid Waste Facilities

Increasing urbanization in the US is leading to development or re-development of lands adjacent to solid waste facilities and these lands are being considered for residential communities and commercial projects. Thus, the potential for nuisance complaints against the pre-existing solid waste facility operations has become an increasing reality. The objective of this study was to develop a methodology to gather scientific and quantifiable data related to potential nuisances caused by landfills to determine setbacks and buffer zones near landfill and transfer station operations. Appropriate recommendations for these setbacks were made from case studies conducted at two landfills in Florida. The study involved making measurements related to odor, noise, litter and dust. Impact on housing prices was also evaluated by analyzing publicly available house price data. In this study volatile organic compound (VOC) concentration was used as a surrogate measure for gaseous impacts. The mass flux of VOCs was measured on the landfills using the dynamic flux chamber method. The ultimate purpose of flux measurements was to provide input data for dispersion modeling to analyze the extent of odor impact around the landfills, which is outside the scope of this study. Ambient measurements were also made around Landfill A for validating the dispersion model. Although there are no significant health and odor impacts caused by the landfill, higher background concentration extend 1.2-1.5 km from the landfill center on the Southeast side of the landfill. Litter from the road sides around the landfills was collected and catalogued based on size and material type. Litter count per site obtained for both landfills was less than the 2001 and 2002 state-wide counts. The difference was statistically significant. Noise measurements were made at landfills during incineration and landfilling. Based on average measurements (Leq) obtained at various distances from WTE facility and landfilling activity, and considering EPA recommended noise level of 55 dB(A) for a quiet neighborhood, a set back distance of 1.6-1.9 km was recommended. Impact on house prices near the landfills was done for four landfills in Florida. Analysis showed that three out of four landfills had significantly impacted the house price within 0.6-0.8 km from the edge of the landfill. Dust measurements were made at Landfill B using particulate samplers, quantifying the dust associated with landfilling. Measured values were below National Ambient Air quality Standard (NAAQ) for PM10. Finally, recommendations were developed to mitigate some of these nuisance

Minimization of Metals Leaching from CCA-Treated Wood Ash through High Temperature Reaction with Mineral Sorbents

Chromated copper arsenate (CCA) treated wood is the popular treated wood found in the wood waste disposal sector. Incineration has been a key disposal pathway for CCA-treated wood waste; however, the potential for emissions of toxic metals from combustion, and their accumulation and subsequent leaching from ash has raised public concerns. Earlier studies by our group focused on evaluating combinations of CCA chemical with sorbents for their ability to minimize leaching of ash

Impact on Leaching & Retention of Metals from High Temperature Reaction of CCA Metals with Alumino-Silicate Sorbents

Past studies have shown that many alumino-silicate mineral sorbents are effective in controlling heavy metal emission during incineration. The objective of this study was to identify Al-Si based mineral sorbents that can minimize leaching of heavy metals from the incinerator ash of Chromated Copper Arsenate (CCA-) treated wood. Experiments were carried out using CCA metal spikes combined with Al-Si sorbents, heated to 700 oC, 900 oC and 1100 oC for 30 minutes. The residual ash was leached using the toxicity characteristic leaching procedure (TCLP).  X-Ray Diffraction (XRD) analysis was conducted to determine the crystalline speciation of the products. Results showed that low leaching was observed for chromium, below the 5 mg/L TC limit, by alumina and silica at all temperatures, and kaolin at higher temperatures (900 oC and 1100 oC). For copper, all sorbents displayed low leaching values (< 51 mg/l) as compared to the baseline. For arsenic, all sorbents exceeded the TC limit.  Speciation characterization results reveal the formation of several metal-metal and metal-mineral compounds that may have resulted in different leaching behaviors of each metal-sorbent pair under different combustion conditions. The results suggest a combination of sorbents at different stages of the combustion process can be effective to control the leaching of CCA metals

A Study of Changes in the Chemical Properties of Soil due to Irrigation by Polluted River Water (Army Canal in Baghdad) for a Long Period

Soil is an essential natural resource for support of human life, but with time, its degradation has been constantly increasing due to the deposition of pollutants. The aim of this research is to study the changes of the chemical properties of the soil which has been irrigated for a long period with polluted river water, and the effect of each property on the other properties. The study was on the agricultural soil besides Army canal in Baghdad city which is irrigated by the canal water. This canal ends at Al-Rustamia wastewater treatment plant. Samples of soil which is irrigated and not irrigated with canal water were taken. The samples were analyzed to find the chemical properties such as heavy metals(Pb,Zn,Ni,Cr,Cd) and other parameters of soil (SO4 ,Cl,TSS,pH,OM). Samples were taken from points far from the canal (non irrigated soil), the other samples have decreasing distances from the canal bank and the last one is just at the river margin (irrigated soil) to find out the differences in chemical properties. The relation between soil concentrations of heavy metals and the other parameters in the chemical properties of the soil was studied the following results were found: A positive corelation between SO4 and OM, TSS and EC was found, also Zn and Pb with SO4, Zn and Pb with OM. Also, a comparison was done between the properties of irrigated soil and the properties of non irrigated soil. Results show that Pb and Ni increased out of the allowable limits, Ec and TSS increment has also been found especially in the non irrigated soil

Modeling the Costs and Environmental Benefits of Disposal Options for End-of-Life Electronic Equipment: The Case of Used Computer Monitors

Managing the growing quantity of used electronic equipment poses challenges for waste management officials. In this paper, we focus on a large component of the electronic waste stream—computer monitors—and the disposal concerns associated with the lead embodied in cathode ray tubes (CRTs) used in most monitors. We develop a policy simulation model of consumers’ disposal options based on the costs of these options and their associated environmental impacts. For the stock of monitors disposed of in the United States in 1998, our preliminary findings suggest that bans on some disposal options would increase disposal costs from about $1 per monitor to between$3 and $20 per monitor. Policies to promote a modest amount of recycling of monitor parts, including lead, can be less expensive. In both cases, the costs of the policies exceed the value of the avoided health effects of CRT disposal.end-of-life electronics, waste stream, cost-benefit analysis

Leaching Retention of CCA Metals from High- Temperature Reaction with Alkaline Earth and Iron Based Sorbents

Chromated copper arsenate (CCA) was the dominant wood preservative used for outdoor wood products to prevent structural decay prior to its phase down starting from 2004. Incineration is one key disposal alternative for CCA-treated wood; however, it results in volatilization of metals at high temperature and accumulation of metals in ash. The objective of this study was to assess alkaline earth and iron based sorbents for their capability to minimize leaching of metals from the incinerator ash. Experiments were carried out by heating CCA metal spikes combined with sorbents to temperatures of 700, 900 and 1100 oC. The residual ash was analyzed for leaching retention using the toxicity characteristic leaching procedure (TCLP) and speciation by X-ray diffraction (XRD). Results show that alkaline earth sorbents (cement, calcium hydroxide and magnesium hydroxide) were the most promising for reducing the leaching of arsenic from the ash below the 5 mg/L TCLP limit and retaining copper at concentrations below detection limits. For chromium, iron and magnesium based sorbents resulted the highest retention with low leachate concentrations (<5 mg/L) at temperatures of 1100 oC. Leaching appeared to be highly pH dependent with As and Cu leaching more at low pH values and Cr leaching more at high pH values. Results also indicate that the formation of compounds like Ca3As2O7, FeCr2O4 and CuCr2O4 during the reaction reduced the volatilization of metals. The results suggest that a combination of sorbents at different stages of high-temperature processes may offer effective control of the leaching of CCA metals.

Waste Management

The Productivity Commission�s inquiry report into �Waste Management� was released in December 2006. The Australian Government asked the Commission to identify policies that would enable Australia to address market failures and externalities associated with the generation and disposal of waste, and recommend how resource efficiencies can be optimised to improve economic, environmental and social outcomes. In the final report, the Commission maintains that waste management policy should be refocused on the environmental and social impacts of waste collection and disposal. The Commission noted that policy makers and community attitudes will need to be guided by more open and rigorous analysis of costs, benefits and risks, if waste management measures are to best serve the community. The Commission also recommends that the Australian Government play a leadership role in facilitating relevant reforms and in developing sound, nationally consistent waste management policies. The Commission makes further recommendations in several other areas including target setting, landfill regulation, disposal charges and levies, product stewardship, government procurement and performance indicators. The Commission�s findings and recommendations are categorised under the following headings: waste management in Australia; the costs and benefits of waste; the case for government intervention; a waste policy framework; the waste hierarchy and target setting; regulation; market-based instruments; extended producer responsibility and product stewardship; Government information provision and procurement; institutional and regulatory impediments to resource recovery; and performance measurement.Environmental Economics and Policy,

An Evaluation of Municipal Solid Waste Composition Bias Sources

The University of Central Florida (UCF) was contracted by the Florida Center for Solid and Hazardous Waste Management (FCSHWM) to develop a well-defined methodology for conducting municipal solid waste composition studies. This methodology must account for the statistical variations in waste composition, be economical and practical in implementation, and build on a consensus of waste management professionals. This paper identifies possible sources of bias in waste composition study results and provides guidance for future planning of local waste stream composition analysis. To accomplish this objective, a composition study was designed and implemented for Marion County, FL, in fall 1996. The potential sources of concern investigated in detail were sample weight and contamination. © 1999 Air and Waste Management Association

An Evaluation Of Municipal Solid Waste Composition Bias Sources

The University of Central Florida (UCF) was contracted by the Florida Center for Solid and Hazardous Waste Management (FCSHWM) to develop a well-defined methodology for conducting municipal solid waste composition studies. This methodology must account for the statistical variations in waste composition, be economical and practical in implementation, and build on a consensus of waste management professionals. This paper identifies possible sources of bias in waste composition study results and provides guidance for future planning of local waste stream composition analysis. To accomplish this objective, a composition study was designed and implemented for Marion County, FL, in fall 1996. The potential sources of concern investigated in detail were sample weight and contamination. © 1999 Air and Waste Management Association