Solid Waste Management Case Study In Bristol Environmental Sciences Essay

real deplete wariness Case Study In Bristol environmental Sciences EssayThe management of municipal Solid Waste (MSW) is a major environmental crisis through protrude of the World, which everyone is pertain ab divulge. In the United Kingdom, the criterion of municipal b each up has change magnitude and 46.9 per cent of the total collected exhaust has disposed of in attainfill in 2009/10 (DEFRA, 2010b). In equation, the Nether props and Denmark have disposed of almost no municipal forsake to landfill and oppo localize members of European Units such as Germany and Sweden have less than a qu contrivanceer of municipal nullify to landfill (DEFRA, 2010b). thitherfore, the UK Government published Waste scheme for England 2007 on 24th May 2007 in bon ton to admit EU strategy and rotary out a sustainable regularity for hierarchy of godforsaken management options within climate change and population growth. The vestigial goals of the strategy argon to set out a bluepr int for macerate prevention, reduction, re-use, recycling and recuperation and meliorate environmental and economic outcomes through join ond recycling of resources and convalescey of zippo from end uncivilized organic evolution a mix of technologies. There ar well-nigh actions of the proposal strategy outlined, for example, animation from waste is expected to account for 25% of municipal waste by 2020 compared to 10% in 2007 and the standard rate of landfill valuate increase by eight pounds per year from 2008 until at least 2010/11(DEFRA, 2010c).As a result, it is necessity to set up a variety of waste word for recovery material in the UK, such as Mechanical Biological intervention (MBT) and dexterity from Waste (EfW). There is no surmise that a trope of topical anaesthetic anaesthetic anaesthetic authorities face major challenges when they manage counterbalance waste sustainably. Take Bristol for example, 59% of waste has been direct to landfill and 40% h as been recycled or composted in 2009/10 (DEFRA, 2010d). correspond to Bristol City Council (2000), c,000 thymines of household waste go forth remain to be treated if 40% waste is recycled or composted. Thus, the council wants to make a 25 years Residual Waste Management Contract with lodge to treat 100,000 tonnes of Residual MSW by one of iii options which include MBT with composting or anaerobic digestion and energy from Waste. In this paper, the environmental impacts of each option give be assessed in order to find a sustainable method for residual waste management in Bristol. Further much, some relative mitigation measures and remediation approaches for chose option pass on be mentioned, focusing key issues of breeding and land re culture after 25 years.2. The Description of Development and rateBristol city council aims to set up a waste sermon limit in the city in order to not only if couple their recycling needs precisely in addition make efficiently recove r value from the residual waste produced. There is no doubt that a hundred thousand tonnes of rubbish send to the rude(a) plants for turning in the coming years rather than dumping it in landfill sites. The possible authorizationity site is assumed as previously used land which locates in the main industrial estate (Avonmouth) in the northern part of Bristol. It would by and large be preferred in proviso call, as no new land would be used and contaminated land restored. In addition, the readiness has good transportation infrastructure, which results from closely primary road ne twainrk and instead rail access. human body 1 shows some dominance previously land in the potential area, which have several large chemical manufacturing plants and withal has a world-shaking residential area in Avonmouth between the industrialized zone and the M5 motorway. Moreover, a large scale of green sites and water trunk around the assumed site.Figure 1. The Potential Site for Waste inte rcession intentiont in Bristolalll sites.jpg(Source Google Map)There are three potential options including MBT using composting (In Vessel Composting) or anaerobic digestion (AD) or EfW interpretd in pursual details. The local waste strategy officers assume that100,000 tonne residual MSW exit be treatedthe detailed value of discussion for each option is draw in Figure 2Figure 2. The Value of Waster interference Processmixed recyclates are charge on average 50/tonneall plants operate 90% of the 8760 hours in a yearboth digestate and compost are disposed to landfill at the full tax rate however, the digestate is charged the full dispose price, compost is disposed for step chain reactorbottom ash can be branched and used as a secondary aggregate, making profit at 5/tonnegas cleareding resi delinquents are barbaric waste and landfilled at 100/ tonne plus landfill tax at 48/tonne electricity from AD is charge 135/MWh, electricity from EfW and In Vessel Composting is outla y 60/ MWh.3. Introduction of cardinal Processing natural selections for the Residual municipal Solid Waste ManagementThis section focuses on introduction of the process and principals of three options including In Vessel Composting, Anaerobic Digestion and Energy from Waste. MBT mainly follow two processes including mechanical sorting and biologic process. Mechanical sorting is to sort mechanical element such as metal, plastics, glass paper, which is made by submit and is a basic process in both composting and anaerobic digestion. However, the biological processes are different because of the variety of word principals. Anaerobic digestion, which is the biological treatment of entire waste without oxygen, utilise microbial activity to break down the waste in a chinkled environment with mesophilic and thermophlic digestion and produce biogas (e.g. Methane and Carbon Dioxide) and digestate at the corresponding prison term. In Vessel Composting is an enclosed compost system and is the treatment of organic matter with aerobic microorganism to produce a form of stable humic substances and inorganic plant nutrient (Agrivert, 2010). In comparison with AD, there is no green zip produced through the system, therefore, the superfluous energy will be used in the processes. Energy from Waste is process incorporation the thermal decomposition of the waste include waste response and storage, combustion system, heat recovery, flue gas cleaning, agency genesis and process control and monitor. Compared with MBT, EfW can disposal of all types of waste without opposite pre-treatment and the temperature has a minimum requirement of 850oC for 2 seconds (March, 2010a). Additionally, incineration offers a further option for the treatment of residual MSW and is already proven and bankable technology in the UK with 26 EfW plants (March, 2010a). However, there is no incineration in Bristol at the moment.4. Environmental Impacts judgment of Three Processing OptionsIn order to achieve the UK governments complete goals and Bristol waste strategy, judicial decision of the environmental and economic impacts of each processing option should be under taken in the next section. Local facilities of waste treatment would provide much local employment opportunities. Moreover, the number of legislation and planning policy comprising inter case, national and local policy will overly be introduced to make sure the sustainable development. Therefore, this section focus on the key issues of waste treatment options such as dividing line runs / health effects, dust / odour, noise, water resources, visual onset and semipublic concern. According to analysis of environmental impact assessment, one of the options will be identified as the Best Practicable Environmental Option for Bristol City Council.4.1 proviso polity and Contexti) International PolicyThe European Union has instigated a range of leadings at a European level that should be suitable for ea ch EU member and transposed into national laws in order to adopt the local environment. The following International policies provide the European framework for Waste applicable to the United Kingdom. European residential area (EC) Landfill Directive 1999/31/EC EC Framework Directive for Waste 75/442/atomic number 63 as amended by 91/156/EEC Waste Incineration Directive 2000/76EC (WID).ii) National PolicyThe Waste Strategy for England (2007) sets out the Governments vision for sustainable waste management. The key objectives and drives of the strategy are to make out the amount of waste produced and increase the rate of recovery of municipal waste. There are in addition some early(a) legislation created to achieve the target in the followingLandfill Allowance Trading Scheme (LATS) prep Policy Guidance Notes (PPG) and Planning Policy Statements (PPS)Planning Policy Statement 1 (PPS1) Delivering Sustainable Development (2005)Planning and Climate Change (PCC) The purpose is to set out how climate change considerations should be taken into account at different stages of the planning process.Planning Policy Statement 10 (PPS 10) Planning for Sustainable Waste Management.During Annex E of PPS 10, the main factors have been taken into account by waste planning authorities when testing the suitability of a site for waste management purposes.iii) Regional and Local Planning PolicyPlanning policies for Bristol are set out in the statutory Development Plan which includes the following documents ( reciprocal ohm Gloucestershire Council, 2010)Regional Planning Guidance for the South West (RPG10) (September 2001)Joint Replacement Structure Plan (as saved) (September 2002)Bristol Local Plan (as saved) (1997)Regional Planning Guidance for the South West (RPG10) (2001)RPG10 comprises the Regional spatial Strategy for the South West and the Regional Transport Strategy, and aim to meet sustainable development in terms of environment, prudence and society.4.2 Anaerobic Diges tionIn terms of biodegradable waste every by anaerobic digestion or by composting MBT technologies helps to get the contribution of babys room gases to minmise the impacts of global warming. IPPC (2010) stated that AD technology for various homogenous waste streams is widely proven in Europe, but there are no full scale plants in proceeding in the UK on municipal derived wastes. Thus, environmental and economic impacts should be assessed in order to develop facilities at present.4.2.1 Environmental impactsAs we all know that anaerobic digestion is in all enclosed system, which whitethorn reduce environmental impacts. As it may achieve a key aim of the landfill Directive and reduce organic wastes from landfill which reduces the production of landfill gas and leachates. Although the facility has defilement control technology in order to control the sustainable processes not only for the company but in any case for the public, each development has some applicable impacts on air, water resources and local residents. For example, odour ventings should be released during material discussion and some otherwise air emission (Methane) would be release during the process. This may refer the local living condition if the pollution will not be controlled and visual intrusion, pests and noise problems. In order to predict how odour will be transported, some information such as meteorological conditions (e.g., void speed and direction, temperature, and inversion conditions) in the proposal site can be obtained from a local weather station. Moreover, contamination of final product is very much difficult to avoid, which actor digestate from residual MSW connot be used for food maturation only regeneration of contaminated land or landfill cover (McKendry 2010). Therefore, AD also has slightly negative impacts on environment during the handling and processes of the facility. According to Figure 2, wage energy (0.5 MWe) will be produced for National Grid, which also can save energy and reduce environmental pollution from power generation. To sum up, compared with no waste treatment in Bristol, AD is a better environmental practical option for waste recovery and also can achieve the UK fundamental target.4.2.2 Economic impactsIt requires comprehensive pre-processing of the waste or source separation and larger digestion tanks as it does not treat the strong Municipal Solid Waste stream but may be used on residual municipal waste stream with contaminants jilted as part of the process. Thus, AD is more bang-up intensive than composting and cost more for landfill tax. Moreover, the output of digestates is generally hazardous and set to landfill, which will also cost more for the process than production from composting. However, compared with composting, energy should be produced and is worth 532,170 which is less than profit of plunder energy from EfW (Figure 3). Someone (City and County of Swansea, 2011) mentions that AD is relatively lo w capital costs compared to most thermal processes. On the other hand, anaerobic digestion has not plentiful profit which created from by-products compared to EfW (Figure 3). In terms of economy, anaerobic digestion is the secondary choice in three waste management options for Bristol.Figure 3. The Analysis of excitant and Output of Economy in Proposed Waste word PlantAnaerobic DigestationIn Vessel CompostingEnergy from WasteInput2,380,000 (Landfill) 1,564,000(Digestate)2,040,000 (Landfill)2,880,000(Compost)408,000 (Landfill)888,000(Gas Cleaning)OutputProfit1,500,000 (Recyclates)532,170 (Net Energy)1,911,8301,500,000 (Recyclates)473,040 (Net Energy)3,893,040375,000 (Recyclates)185,000 (Bottom Ash)3,784,320 (Net Energy)3,048,3204.3 In Vessel CompostingActually, this technology has only had restrain experience in the UK however, it is rapidly increasing in number due to recent legislation of waste management such as Landfill Directive. The return of In-Vessel Composting is that t he processes are more controlled and can be designed to achieve qualify temperatures of facilitate bacteria destruction.4.3.1 Environmental impactsComposting can reduce volume of organic waste fraction of MSW by 25-50% and minmise landfill rate (IPPC, 2010), which avoid environmental pollution (Landfill gas and leachate) similar with AD. However, some potential odour and leachate also should be produced, which can result in air and water resources may be polluted to some extent. Although it is suitable for green and kitchen waste, it is potential of co-composting operations with other waste streams such as paper, sewage sludge (IPPC, 2010). On the other hand, it requires careful source segregation of further post or treatment as sensitive contamination of glass and plastics. Furthermore, in comparison with other options, In Vessel composting has no energy output and need extra energy for operation, which will affect more issues from power generation such as air pollution. It is sim ilar with AD that the development is not baneful for ecosystem and visual instruction as the proposed site is previously used land which may be contaminated or brownfield site. The technology has a great ability to control air pollution emissions than mass burn EfW in theory, but this has not yet been demonstrated in practice in the UK (Environment Agency, 2010).4.3.2 Economic impactsAlthough the capital cost is not quite expensive than Energy from Waste, the balance of input and output of waste treatment process is totally different than other options. According to Figure 3, the developer or government should deck more money for rejected waste to landfill and extra energy (473,040), which means the meshwork of recyclates cannot make sure the continuously process of operation. Thus, in terms of economic aspect, this technology is not suitable for the UK fundamental sustainable development target and is the bastinado option.Energy from WasteIn the UK, Energy from waste has a par ticularly poor public image and has been debatable by environmental groups on the grounds of perceived health impacts from emissions to air. Combustion of residual MSW can produce or release carbon dioxide and other greenhouse gases. Hence carbon emissions should to be considered in terms of composition of the residual waste stream, the type of energy produced (heat and/or power) and the overall generating readiness of the facility.4.4.1 Environmental impactsCompared with other options, EfW can disposal of a variety of waste without restriction and pre-treatment required. However, dust problem may exist within the waste reaction hall or drawn into the furnace. Moreover, there is a WID emission limit and air lineament standards regulated in order to control the air emission especially greenhouse gases from factories. The advantage of this technology is that the state of the art of pollution control technology is completed for global use. In addition, energy recovery includes Comb ined Heat and Power (CHP) plants and opportunity for district modify programmes. However, the temperature is not easy to control during the operation processes, which may affect the force of residue quality and disposal when combustion is not completed. Although EfW can melt waste to landfill and emission reduction (methane)from landfill and residual waste, which to some extent may address climate change, air pollution of EfW is more meaningful than other options (Hong, 2010). The WID emission limits to air shows daily average emissions limit from incineration in the following (Veolia, 2011)Dust (Particulates) 10mg/m3Total Organic Carbon 10mg/m3Hydrogen Chloride 10mg/m3Carbon Monoxide 50mg/m3 sec Dioxide 50mg/m3Oxides of Nitrogen 200mg/m3According to Figure 2, the number of waste can be combusted and bottom ash can be used for construction applications, which reduces the quantity requiring landfill disposal to under 10% of the feedstock mass (IPPC, 2010). In comparison with othe rs, 8MWe net energy should be produced and deliver cheap heat and power either to the National Grid or local users. On the other hand, it also save more energy and reduce pollution from power generation plants. EfW is not long term liability facility, thus, local EfW would provide the outperform global solution for Bristol depending on the Life Cycle Assessment. Furthermore, the impacts of visual, pests and noise and ecosystem are similar and related to other waste management options and with proper planning can be minimized to acceptable levels. As for the visual impacts, the following factors should be considered direct effect on landscape by removal of items such as trees potential of an exhaust stack associated with air clean up systems screening features and scale of vehicles accessing site.4.4.2 Economic impactsThere is no doubt that EfW is one of the high capital costs technology, however, it also create net profits from the processes. According to Figure 3, although, gas c leaning residuals are hazardous wastes and landfilled at 148 per tonne, the facility can create 3,048,320 net profit from operation system except the capital investment, which including 185,000 income from bottom ash, 3,784,320 profit from electricity and 375,000 worth from recyclates. Thus, EfW is the best option for waste treatment for Bristol in terms of economy compared to other options. On the other hand, the facility will waste more investment and energy during the process stopped when there is no enough waste for combustion process.4.5 SummaryIn summary, each option may achieve the UK and local waste management and recycling target and to some extent reduce waste and air emission such as methane and carbon. However, in terms of sustainable development which related to economic, social and environmental aspects, each option has its own disadvantages and advantages. As for economy except the capital investment, Energy from Waste can make more profit in 25 years than MBT using C omposting or Anaerobic Digestion. Although air emission from EfW is more significant than other options, EfW has been used for a long time and is improving or mitigating more sustainable technologies to avoid the negative impacts on environment. It is true that Energy from waste has a particularly poor public image however, public attitude will be changed within the smear changing. Therefore, Energy from Waste is the best value options for Bristol City Council to reach the waste treatment target and follow sustainable development.5. Mitigation Measures and Remediation beginEnergy from Waste is the Best Practicable Environmental Option for Bristol waste management programme based on Environmental Impact Assessment (EIA). As we all know that each option has its limitation, EfW is also a case in point. EIA states that the efficiency of combustion, air emission (flue gas emission and cleaning) and public image are the mainly significant issues of EfW facility slaying for Bristol. More over, the land restoration after use should be considered at the starting signal of construction in order to be able to use as sustainable as possible. Mitigation measures should aim to avoid, reduce, or remedy any significant adverse effects that a proposed development is predicted to produce. First of all, because it is a smaller scale EfW plants, it is better to maximize the scope for dealing with peril events and other potential adverse impacts. Moreover, more information qualitative and quantitative assessment of impacts such as meteorological conditions and ambient air quality should be collected for the next depth assessment. The recommended mitigation measure for efficiency of combustion is to use more effective techniques. For example, the techniques such as trematode Gas Recirculation (FGR) can control the incomplete combustion in order to increase efficiency and to reduce the flow rate of pollutant emissions (Liuzzo, 2007). In addition, the lamp chimney should be high enough to furnish adequate draft and to carry through the products without causing local sir pollution. There are also some methods to increase corroboratory public image, such as enhancing propaganda or media spread and improving education. The risk management including accident management/plan and security watchfulness also should be undertaken to avoid the health and safety of employees.As for the proximo development after use, the land should be careful managed to avoid potential hazardous components released into the land whether it is current contaminated or not (McKendry, 2010). The first-year recommendation aims to used less penetrability materials for land construction and reduce pollutants released. Moreover, the regular clean up system is recommended to collect the residual waste during transporting system and clean up the dirty area such as oil releasing sites. Contaminated Land Management Regulation indicates that the defiler or owner has responsible to deal with pollution if the land will be contaminated by human activities. In my view, the proposal site is hard to change to an eco-green site after development, thus, it is better to develop as commercial or industrial use in the future.6. ConclusionIn conclusion, Environmental Impact Assessment of Anaerobic Digestion, In Vessel Composting and Energy from Waste were analysed in this paper in order to find out one of the best sustainable development for Bristol and also achieve the UK fundamental goals for waste management. It is certainly that each option has both negative and positive impacts on environment and economy. The main aim of them is to reduce waste sent to landfill and achieve the UK waste management target moreover, they also have same impacts on environment such ac visual intrusion, public image, potential contaminated land after use and air pollution. However, the significant impacts of facilities are different in different technologies for example, odour emission is more sign ificant during anaerobic digestion approach, visual intrusion, public image and air emission is more significant for Energy from Waste, and energy use and odour and leachate are significant in composting process. In terms of economy, EfW is the best option with highest net profits during the process on the other hand, In Vessel Compost is the worst approach because of extra energy supply. At the last, EfW has been chose to treat residual Municipal Solid Waste with the additional mitigation measures in Bristol, which results in the development is not only suitable for international, national and local strategy but also meet the Best Practicable Environmental Option which is sustainable and integrated in the further development.