Workings Of A Solid Waste Management System Environmental Sciences Essay

Any substance which can no longer be utilized once more by the owner and which is discarded at the terminal can be termed as waste. ( R. Taylor and A. Allen ) . Solid waste include refuse, sewerage sludge, ashes, discarded metal, rubbish on any solid or semi solid stuff ensuing from domestic, industrial, commercial, agricultural operations or from community activities.

Pull offing solid waste disposal has been of great concern from the clip when people start to populate together in big lasting settlements. ( T. JANAKIRAM and K. SRIDEVI 2010 ) Therefore if waste is non disposed off properly and safely, it may present wellness jobs and foul the environment. ( Zhu et al. , 2008 ) . Solid waste direction involves every individual activity which reduces the wellness and environmental impacts of solid wastes produced by family sectors, commercial, industrial, healthcare sectors, agricultural activities. ( R.Kapoor 2010 ) . It is an undeniable fact that the hiking population and economic development is ensuing in an alarming addition in municipal waste coevals rates. ( Yongping Li1 and Gordon H. Huang 2007 ) .

There exist many procedures that take topographic point to heighten the waste direction system. Harmonizing to Yongping and Gordon the chief procedures are godforsaken aggregation, transit, intervention, and disposal and these procedures are carefully revised by the determination shapers. ( Yongping Li1 and Gordon H. Huang 2007 adopted by Wilson 1985 ) ) . Furthermore surveies from several profound literature reviews reveal that the types of aggregation techniques to be used, service degree to be offered and adopted and assorted types of waste processing system besides play a important function for the improvement of the waste direction system.

An integrated MSW direction system includes legion waste-management comfortss to run into the overall demand, to treat, dainty and dispose waste. These installations comprise of transfer-stations, landfills, incinerations, composting and recycling. The day-to-day waste-generation measures, installation capacities and waste aggregation and intervention cost, every bit good as their interrelatednesss are unsure. ( Yongping Li1 and Gordon H. Huang 2007, Yongping Li and Guohe Huang 2009 ) . Such uncertainnesss differ in different clip period and issue in multilayer and multi-objective system constituent which affect waste aggregation. Furthermore these uncertainnesss amplify since many activities and system constituents are connected with economic punishments for e.g the policies, processs or jurisprudence being violated. As the tendency of uncertainnesss keep on increasing, it becomes hard to run into the overall solid waste disposal demand due to deficient capacities of waste-management. ( Yongping Li1 and Gordon H. Huang 2007 ) . Harmonizing to Yongping and Guohe an effectual planning attempt can as a accelerator for sustainable socioeconomic development throughout the Earth though the thought of be aftering efficaciously seems complex. ( Yongping Li and Guohe Huang 2009 )

Poor solid waste direction patterns do non make a good feeling on the foreign investors and tourers. This lessen investing and grosss from these beginnings. ( R. Kapoor 2009 ) . Mismanagement and non-availability of good waste aggregation and disposal installations besides lead to psychological emphasis and fright of wellness hazards ( R. Kapoor 2009 adopted from Petts and Eduljee, 1994 ; Becker, 2001 ) . This explains why in many states the Government extensively recognises the importance of screening the job of municipal solid waste and seeks ways to stem the inauspicious consequence.

Collection, transportation and transit of solid waste

Waste aggregation is the procedure from which waste is being collected from the beginnings to the intervention works, reassign station or concluding disposal point. Garbage trucks collect waste from house to house, or at kerbs side aggregation. The waste are either left in the waste containers or recycling bins that are aftermath being collected by the waste aggregators utilizing the waste roll uping machine. Most of the waste are being collected by municipal lorries and refuse trucks and are being disposed to dumping country in big capacity lorries. The semi mechanised waste aggregation method is used in topographic points where big vehicles can non come in narrow lanes. ( S. Lotfi et al 2007 ) . When the municipal lorries or refuse trucks arrive at the transportation station, they tip the collected garbage on a tipping floor where the big capacity trucks transport the garbage to the landfill for concluding disposal. ( Harold J Yaffe 2001 ) .

Since aggregation and transit of municipal solid waste incur batch money, the waste direction calls for betterment. The size of the lorries and trucks, the distance travelled and the way must be good considered. Deviation of the engine power demand, different sums of fuel ingestion and emanations depend on the engine public presentation, efficiency and besides by the route incline. Thus these factors need to be taken into consideration in waste aggregation and transit ( from by Tavares et Al. ( 2008 )

Fuel ingestion during waste aggregation and transit is subjective by the traveled distance, the existent operation conditions of a given vehicle, type of the drive state of affairs, the vehicle burden and the route gradient. ( Gilberto Tavares et al 2008 adopted from Ntziachristos and Samaras ( 2000 )

It is indispensable to account consequence of the vehicle burden and route gradient for heavy vehicles. Therefore, and because of their big multitudes, the power employed during the drive is the important factor for the fuel ingestion ( by Gilberto Tavares et al 2008 )

Seeking a topographic point for waste disposal is a hard job as it includes an extended planning and consideration about the choice of disposal location, environmental restraints, land H2O protection, land usage and transit and besides it must include the different positions of the populace. ( by Richason and Jonson 1988, Van Zeeand Lee 1989 )

A transportation station is a probationary deposition of solid waste. Transfer Stationss serve as topographic points where local waste aggregation vehicles deposit their waste before lading them into larger vehicles. These larger vehicles in bend conveyance the waste to for concluding disposal in an incinerator, for recycling or landfill.

A landfill is a site for the disposal of solid waste stuff. Landfill is the most common, simplest, cheapest and cost effectual methods of waste disposal ( Barrett and Lawler, 1995 ) . Solid waste from transportation station is being dumped into the landfills. In many low income states, about all of their generated waste is landfilled.

Health and Safety Hazard with waste direction

The procedure of waste direction which comprises of aggregation, processing and disposal of waste have both an impact on both the wellness of the populace and the environment. Waste may be inherently risky to wellness due to its complexness and of assorted mixture features.

As a affair of fact due to its impending wellness effects built-in in the waste and the associated with their direction, it has been an issue of a huge organic structure of research.

From 1992 to 1997 the occupational human death rate in the United State was 46 out of every 100,000 garbage aggregators and this demonstrate that waste aggregation is a deathly business as it is 10 is times higher when compared with all other workers ( Drudi D, 1999 adapted from Hermando R. Perez et Al, 2006 ) . The mortality rate of drivers and assistants using in the aggregation of Municipal Waste are found to be an norm of 90 out of every 100,000 workers each twelvemonth ( Englehart et al, 2000 adapted from Hermano R. Perez et Al, 2006 ) . Adding to the high Numberss of tie ining mortality due to blow aggregation, there is a besides a considerable rate of non- fatal hurts experienced in waste aggregation such as back injure ( 17, 9 % ) , Knee hurt ( 12, 3 % ) , manus hurt ( 12,3 % ) and foot hurt ( 11,4 % ) . ( Evens et al, 1998, adapted from Hermando R. Perez et Al, 2006 )

In the surveies of Municipal waste direction a wide scope of organic dust has been found and this have a negative impact on the respiratory conditions to those exposed and research workers have found that those workers engaged in the handling of waste history for a higher hazard of developing assorted signifier of respiratory jobs when compared with the whole population ( Rutner- imperativeness C, 1976 ) .

From the Danish ROAD database an analysis has shown that the hazard of developing GI job is higher with garbage aggregators out of the Danish work force population ( Poulsel et al, 1995, adapted from Hermando R. Perez et Al, 2006 ) . In another survey, 1747 waste aggregators and 1111 persons as controls were taken to demo the consequence of their business on their digestive system. The consequence demonstrates that the waste aggregators have a higher happening rate for sickness and diarrhoea than the control ( Ivens et al, 1997 adapted from Hermando R Perez et Al, 2006 ) .

Safron et Al, 2003 of the Centre for Research in Environmental system, Pollution and Remediation of the University of West England, Bristol, UK have conducted a research which aims to demo an nonsubjective appraisal of the epidemiological grounds from the public wellness relating in the waste direction procedure. In their survey they arrived to the decision that most of the epidemiological surveies that have been associating waste direction and wellness conditions are based on weak or non-existent exposures informations. Hence this demonstrates that those surveies which have been made were seldom based on quantitative environmental measuring and on the person at the clip of exposure.

Jean Overview of transportation station

H & A ; S jeopardy associated with transportation station

The causal wellness and safety hazard factors in a waste transportation station include prohibited or unauthorised waste stuffs, fire, olfactory properties, disease, vectors, noise, dust, and litter. Waste Pickers and aggregators are considered hapless as they are unable to eke out the bare lower limit for their endurance. They earn their life by selling collected waste from the solid waste transportation station for recycling at low monetary values. ( YUJIRO HAYAMI* , A. K. DIKSHIT, & A ; S. N. MISHRA October 2004 ) . On making so, they endure hazards of being bitten from animate beings and vectors such as Canis familiariss and rats. They are besides exposed to noisy environment. Furthermore they are exposed to noxious substances, fecal affair, organic structure parts, used panpipes and other damaging stuffs found in the waste. Besides choosers suffer from ergonomic jobs chiefly musculoskeletal upsets ( MSDs ) due to the heavy manual handling and awkward positions ( Anne Scheinberg Justine Anschutz 2006 adapted from new wave Eerd 1996 ; Simpson-Hebert et Al. 2005 ) age-related macular degeneration to resound job.


The chief beginnings of noise from a transportation station are due to the heavy vehicles traffic and the operation of heavy-duty installation equipment ( by Nil-Bin Chang et Al 1996 ) . Offsite traffic noise near transportation station ‘s vicinity is besides considered as a beginning of noise. Waste transportation Stationss make usage of stationary solid waste compactors or engine-driven tamping equipment which multiply the consequence of noise. Equipment noise comprises of engines, backup dismaies ( pagers ) , hydraulic power units, equipment pails, blades banging and grating on concrete and steel surfaces. Furthermore the unloading of waste onto a tipping floor, cavity, steel bead box, or dawdler can besides bring forth considerable noise depending on the type of waste, autumn distance, and surface. Sometimes the strength of noise is so high that this cause employees, waste choosers and clients non to hear instructions or warnings or the noise from a extroverted jeopardy.

Air Emissions

Air emanations at transportation Stationss result from dust-covered fumes. Mobile equipment such as trucks and stevedores, driving on unpaved or dust-covered surfaces, and cleanup operations such as street sweeping generate wastes delivered to the transportation station. Tiping countries have localized air quality jobs that amount to a safety and wellness jeopardy. Activities carried out at that place produce clouds of airborne ‘bugs ‘ and dusts which are inhaled through the lungs doing lasting harm to external respiration.

Harmonizing to Krystal J. Godri et Al ( april 2010 ) , high exposure to ambient particulate affair ( PM ) lead to cardiorespiratory job due to the dust laden ambiance and the heavy- responsibility Diesel vehicles transporting the waste. However the latter and his friends could non turn out whether the wellness jobs are merely due to the dumbly inhabited community which besides contributes extensively to magnify the PM exposures or whether from the toxicity of PM generated from WTS-related.


Vectors such as gnawers, insects, rats and scavenging birds have the possible to distribute diseases. Waste present and stored for extended periods of clip in the transportation station service as nutrient beginnings for the vectors. ( BHR CIVIC GROUP 2009 ) . Exposure to rat urine airss a high hazards to the wellness of people working in the waste transportation station.


Traffic poses a important offsite environmental impact related with larger waste transportation Stationss. Although rural Stationss usually receive less vehicle movements the paths are affected by the big vehicle traffic. ( United State environmental protection bureau ) . There exist high hazards of turn overing due to overloading of lorries coming for waste disposal to reassign station. Overloading of waste besides lead to potentially do people to fall from the trucks or lorries since the waste is slippery.

Water Quality

When overflow contacts waste, it is considered potentially contaminated and is known as “ leachate. ” Most transfer Stationss send some sum of waste H2O to sewer systems. In add-on to leachate, waste H2O from day-to-day cleansing of the waste managing countries and the installation ‘s public toilets and support countries typically are discharged to the cloaca.


In many developing states, waste aggregators collect waste from the street and lodge the waste in transportation Stationss where waste choosers seek nutrient or recycling stuffs. Harmonizing to C. Alvarado-Esquivel1 et Al ( 2008 ) Toxoplasma gondii infection is significantly higher among waste choosers and aggregators in the Durango City of Mexico than other populations due to high exposure to contaminated refuse and hapless hygiene patterns. However there is no information available in his survey about the epidemiology of Toxoplasma gondii inflexion in people exposed to municipal waste.


Accident due to falling from tallness is another possible jeopardy that issue in a transportation station. Standing and walking on tonss to either sheet or pare the burden can do the worker to fall, faux pas or trip in the burden.


The waste transportation station is besides accountable for major manual managing hurt due to improper organic structure place, insistent gesture, and repeated or uninterrupted effort of force contribute to hurts. ( from waste industry wellness and safety-HSE ) . Managing of heavy waste and insistent undertakings lead to musculoskeletal upsets. These farther multiply the wellness and safety hazards to which waste choosers and employees working at the waste transportation station.

R.A of wellness and safety jeopardy

Hazard has been defined as the likeliness that a peculiar event will take to an inauspicious result – most normally, the ultimate effect of a hazard is decease ( Ritter, 1981 ; Wilson, 1984 ) . In this context, it is non appropriate to restrict the definition of hazard to either chance or magnitude of the resulting effects of the hazard. For a more complete definition, the merchandise of the chance and magnitude of the effect of the hazard is frequently preferred. The NRC ( 1975 ) has developed a theoretical account that simulates the peculiar environment being examined and studied, whereby it computes the results and their frequences as per the theoretical account ‘s end products.

The above definitions aim at supplying a brief overview of the term “ hazard ” , which leads to the preparation of definitions and apprehension of the hazard appraisal. The most cosmopolitan and simplistic expression accepted expression for hazard calculation uses the generation of frequence or rate of happening and the degree of impact, to give the degree of hazard. A simple manner of overlapping the likeliness and the effects of jeopardies is by utilizing a hazard appraisal matrix ( Government of South Australia, Department of Education and Children ‘s Services, Health & A ; Safety Services, June 2006 ; Government of South Australia, Department of Education and Children ‘s Services, September 2008 ) . This is frequently used as a format in which the hazard appraisal procedure is easy clear and observations are noted and compiled.

Phil Hughes ( 2009 ) gives two options for traveling about the hazard appraisal process- there are two signifier of hazard appraisal which may be used individually or combined to give an optimum end-result. Quantitative hazard appraisals involve measuring the hazard by denoting the chance of the happening of that peculiar hazard and uniting it with the possible badness or nature of the effects, which is eventually given a numerical value. On the other manus, the qualitative hazard appraisal relies on personal perceptual experience and opinion, and is normally denoted by classs such as high, medium or low, frequently in the signifier of a hazard appraisal matrix compartmentalized in footings of hazards, effects, likeliness, amongst others.

In a survey undertaken for the publication of his book, Vincent T. Covello proposes a generic definition he has adopted, wherein the hazard appraisal would be characterized by a bit-by-bit process aimed at depicting and quantifying the exposure to put on the line, be it straight or indirectly, affecting harmful merchandises, events, activities and procedures. This definition encompasses the wellness and safety facets and converges the hazard facet to the possible harmful wellness, safety and environmental effects every bit good as the equivocal nature of the hazard related to is chance of happening, frequence, continuance, strength, size or magnitude. However, there is much divergency in the attack to put on the line assessment – while some research workers and writers lay accent on the fact that hazard appraisal should be a separate and built-in procedure in itself, others might see the procedure of hazard appraisal as a constituent of the hazard analysis. Indeed, in his book, Vincent T. Covello specifies that the hazard analysis consists of three basic stairss, viz. , hazard designation, hazard appraisal, and hazard rating. The hazard assessment itself consists of four degrees: release appraisal, exposure appraisal, effect appraisal, and hazard appraisal.

Method of hazard appraisal

There are assorted hazard appraisal methods that may be used in different contexts and types of organisational scenes. However, all hazard appraisal methods have several stairss in common as stated by Bruce W. Main. An designation of the bing and possible jeopardies is foremost carried out, the different degrees of hazard are so assessed, so the agencies and methods of cut downing the hazards are devised and implemented, and eventually, the calculations of hazards are presented and documented in an acceptable format. Bruce W. Main farther explains that the designation of jeopardies is the most cardinal portion of the hazard appraisal procedure since it the finding of all the bing and possible jeopardies is the lone manner to supply a complete appraisal of all hazards involved – losing any jeopardy during this procedure will intend that the hazard appraisal will be uncomplete, go forthing room for bing jeopardies and hazards uniting to organize accident-prone scenes. The calculation of hazards by apportioning hazard degrees or tonss is known as a “ Risk Scoring System ” , whereby hazards are assessed depending on several factors ; the hazard hiting systems selected may differ and may run from qualitative, semi-quantitative and quantitative. Therefore, the appropriate 1 for the peculiar organisational scene must be identified, based on the assorted factors involved and the extent to which they are quantifiable. Harmonizing to Bruce W. Main, there is a divergency of hazard appraisal methods, which one should non acquire confused by and accordingly take away from the original purpose. Harmonizing to him, the generic term “ hazard appraisal ” may mention to the precise stairss involved in finding and ciphering a hazard degree and delegating a hazard mark, while it may besides be a nonspecific term to depict the overall procedure, or to mention to any method that assesses hazards.

D.W. North ( 1995 ) explains the term hazard appraisal as being the classification of hazards in footings of the chance and badness of the wake of a peculiar hazard when it has non been controlled or eliminated. This calls for a mathematical and scientific analysis of specific jeopardies and their hazards with quantifiable consequences that will enable, every bit good as facilitate opinion in the analysis of hazards. He states that although some of the informations and information might non be available at some point, the assessors must take into consideration all the elements that have been gathered and which pertain to the hazards involved but must finally trust on their ain perceptual experiences. The perceptual experience of hazard as been addressed in some researches ( Paul Slovic, 1987 ) . The critical finding of judgmental chances is, harmonizing to D.W. North ( 1995 ) most accurately carried out by traveling through a bit-by-bit appraisal of the hazard chances for each jeopardy. As he proposes, the different degrees or grades of badness refering to the reverberations of a unsafe happening or catastrophe, as it may be, must be classified so that the assessor may easy find which jeopardies have the most serious impacts. However, he states that these hazard appraisals provide no easy agencies of spoting the jeopardies in all respects, and unless the designation of jeopardies is complete, the hazard appraisal consequences and decisions may still turn out to be missing.

As BoA?o NikoliA‡ and co-worker ( 2009 ) have mentioned, although there is no 1 bad hazard appraisal method, it is however true that some theoretical accounts of hazard appraisal are preferred to others. It is a affair of saying the hazard appraisal method chosen right from the start to avoid complications and ambiguity. The method proposed by BoA?o NikoliA‡ and co-worker ( 2009 ) ensures that the hazard appraisal studies carried out green goods quantifiable values, even for qualitative information – Hazard Assessment Acts ( Nikolic & A ; Laban, 2008 ) . A stratification of stairss is proposed while guaranting that the first and basic issues of general study of the organisation, its procedures and activities carried out, the classs of individuals involved, and other such facets, are all covered. Based upon the hierarchy of controls, the acknowledgment and designation of the different jeopardies and their possible impacts is the key to get downing the procedure. The hazard appraisal is so carried out, while taking into consideration the assorted jeopardies and their effects if non controlled. The means and steps for the riddance, decrease and proactive bar schemes must be implemented. Once the above stairss have been carried out, there is a demand for a hazard reappraisal which will see to the jeopardies that have non been eliminated after the first effort to command them. There must be a decision from the stairss already implemented and the position of the ensuing state of affairs until a deeper set of agencies and steps is farther dealt with to make or keep the desired hazard degrees as idea to be acceptable.

Such a hazard appraisal will guarantee a proper and elaborate agencies of measuring the bing hazards, their possible impacts and aftereffects, while enabling the assessor to find and propose control steps to minimise the degree of hazard as deemed appropriate in such a instance. The hazard appraisal method chosen should unite the description of jeopardies and their effects, the failings of the bing processs in topographic point, the different stakeholders, and a system of hazard categorization or classification. BoA?o NikoliA‡ and co-worker ( 2009 ) propose two techniques and attacks for the hazard appraisal, whereby the first consists of utilizing an already established method comprising of tabular arraies and quantitative figures of the variables to be considered during the hazard appraisal, such as the likeliness of happening ( P ) , the frequence of exposure to the jeopardy ( F ) , the grade of possible injury ( H ) , and the figure of individuals exposed to the jeopardy ( N ) .

Such a technique encompasses the different workplaces and is therefore applicable to any work system or scene

It defines four classs of hazard degrees, which can be altered depending on the user ‘s aims and the pertinence of the hazard degrees ; negligible, low but important, high, unacceptable. Then, hazard is computed and mathematically calculated from the undermentioned expression:

R = P * F * H * N

The 2nd attack efforts to organize a matrix of hazard by combination or generation of chance and effect. Probability is created as a matrix of safety appraisal and frequence.

Mentioning to Manahan ( 2005 ) , Michaela Bobeck ( June 2010 ) examines the effects on occupational safety and wellness facets of solid waste, whereby the pervasiveness and spread of fouling factors are based on the features and single, every bit good as combined, belongingss of the wastes and the environmental scenes of waste disposal. The procedure of debasement of organic affair in solid waste disposed of, and pass throughing through waste transportation Stationss is an issue that demands the attending of all in the purpose of restricting the associated hazards. Another facet which should non be forgotten is the taint of nearby H2O resources or belowground H2O when stormwater carries off leachate and other contaminations that are exposed in unfastened air at the transportation station. Soil pollution, air pollution, and vectors or gnawers utilizing the transportation station as engendering evidences must besides be taken into consideration. Therefore, the hazard appraisal conducted should besides take into consideration all these factors in their single scenes for an indifferent and valid consequence.

Daniela Bleck ( 2010 ) identified some facets of the activities of waste transportation Stationss in which the handling of assorted wastes incorporating a major per centum of ashes and organic stuffs would take to wellness hazards, related to the exposure to airborne organic dusts via inspiration. Furthermore, it is apparent that the exposure to risky substances that may non easy be classified due to their constituents that are frequently hard to segregate and analyse, is ever-present. Other debatable countries include the assorted musculoskeletal upsets that arise due to inappropriate and hapless techniques of manual handling of heavy tonss, every bit good as other factors that cause unneeded forces on the muscular and skeletal system. Daniela Bleck ( 2010 ) proposes that there are agencies of measuring wellness hazards during raising operations by utilizing the Key Indicator Method by BAuA ( 2001 ) . This method involves entering and apportioning tonss or evaluations to specific hazard factors that have been identified. Depending on the frequence of raising operations or the rate of raising undertakings, the clip spent keeping the burden, every bit good as the transporting distance, clip evaluation points are so allocated to the hazard factors that have been identified.

Then, evaluation points are assigned for the peculiar weight of tonss being handled during lifting, keeping, and transporting activities, including the organic structure position adopted by the workers throughout the undertakings. Then the overall on the job conditions and work scenes are analyzed and decisions based upon the whole observations are compiled. The clip evaluation points are computed and multiplied with the consequences obtained to bring forth a hazard mark ; this hazard mark is so stratified in a scope get downing from one to four, wherein will lie the different hazard degrees that are noted for the hazard appraisal.

In every workplace, the jeopardies and hazards present must be controlled so as to let the minimal degree of hazard in an purpose to hold a zero accident strategy ; this is the really baseline of all wellness and safety programmes in all workplaces. The finding of the effectivity and acceptableness of degree of hazards must be done by a proper hazard appraisal since these are the most utile rating tools. The decisions of the hazard appraisal will be based upon single susceptibleness, albeit the quantified and graded degrees of hazard. There has non been much detailed research done on the hazard appraisal carried out at waste transportation Stationss, and the few instance surveies are limited to specific facets, instead than a planetary position.