Current situation of domestic solid waste at Luong Son town, Luong Son district, Hoa Binh province .... The impacts of domestic solid waste on the environment and public health in Luong
Trang 1MINISTRY OF AGRICULTURE AND RURAL DEVELOPMENT
VIETNAM NATIONAL UNIVERSITY OF FORESTRY
Faculty: Forest Resources and Environmental Management
Student : Nguyen Thi Hieu Student ID : 1453061153
Class : K59A Natural Resources Management Course : 2014 – 2018
Advanced Education Program Developed in collaboration with Colorado State University, USA
Supervisor: MSc Nguyen Thi Bich Hao
Ha Noi, 2018
Trang 2ACKNOWLEDGEMENT
First and foremost, I would like to express my great appreciation to MSc Nguyen Thi
Bich Hao from Vietnam Forestry University, my research supervisor, for her enthusiastic
encouragement throughout my research project Her ideas, knowledge and efforts are heavily
embedded in this study
I wish to extend my thanks to the lecturers of the university, who have taught me for
more than four years, and to the cooperation of Vietnam Forestry University and Colorado State
University, especially, the faculty of Forest Resource and Environment Management
Finally, I would like to express my deep appreciation to the staffs in Hoang Long
Investment Limited Company and local people live in Luong Son town, Luong Son district,
Hoa Binh province for the enthusiastic help during the work Due to the limited knowledge,
time, and experience, this thesis still needs to be improved I am looking forward to receiving
feedback from teachers and friends to enhance it
Xuan Mai, 9 th September 201
Student
Nguyen Thi Hieu
Trang 3CONTENTS
ACKNOWLEDGEMENT i
CONTENTS ii
LIST OF TABLES v
LIST OF FIGURES vi
ABSTRACT 1
CHAPTER I INTRODUCTION 2
1.1 Overview of solid waste 2
1.1.1 Definition 2
1.1.2 The origin of domestic solid waste 2
1.1.3 Classification domestic solid waste 3
1.1.4 The composition of domestic solid waste 4
1.2 Impact of domestic solid waste 5
1.2.1 Impact on the environment 5
1.2.2 Impact on public health 5
1.2.3 Impact on the urban landscape 5
1.3 The current state of domestic solid waste management 6
1.3.1 In the world 6
1.3.2 In Viet Nam 6
1.4 Some methods of treatment domestic solid waste 7
CHAPTER II RESEARCH GOAL AND OBJECTIVES 9
2.1 Goal 9
2.2 Specific objectives 9
CHAPTER III RESEARCH METHODS 10
3.1 Study site 10
3.1.1 Geographical location 10
Trang 43.1.2 Topography 11
3.1.3 Climate 11
3.1.4 Resources 12
3.1.5 Population 12
3.1.6 Economy 13
3.2 Study methods 13
3.2.1 Investigating and doing research on the field 13
3.2.2 Interview method 15
3.2.3 Method of determining the composition of domestic solid waste 16
3.2.4 Statistical methods and data analysis 17
CHAPTER IV RESULTS AND DISCUSSIONS 18
4.1 Current situation of domestic solid waste at Luong Son town, Luong Son district, Hoa Binh province 18
4.1.1 Sources of domestic solid waste in Luong Son town 18
4.1.2 The amount of domestic solid waste generated every day in the town 21
4.1.3 The forecast volume of domestic solid waste in Luong Son town to 2020 24
4.2 The impacts of domestic solid waste on the environment and public health in Luong Son town, Luong Son district, Hoa Binh province 26
4.2.1 Impacts of domestic solid waste on the environment 26
4.3 Current situation of management and treatment about domestic solid waste at Luong Son town 31
4.3.1 The situation of domestic solid waste management 31
4.3.2 Classification, collection and transportation of domestic solid waste at Luong Son town 32
4.4 Proposing solutions to improve the effectiveness of domestic solid waste management in Luong Son town 37
4.4.1 Environmental protection policy 38
Trang 54.4.2 Collection of domestic solid waste 38
4.4.3 Improvement transportation of domestic solid waste efficiency 38
4.4.4 Other support methods 39
CONCLUSIONS, EXISTENCES, AND RECOMMENDATIONS 40
1 Conclusions 40
2 Existences 40
3 Recommendations 41 REFERENCES
APPENDIX
Trang 6LIST OF TABLES
Table 1.1 Definition of the domestic solid waste composition 4
Table 1.2 Advantages and disadvantages of some methods of domestic solid waste treatment 7
Table 3.1 The weight of domestic solid waste generated by households in one day 14
Table 4.1 The composition of domestic solid waste calculated according to the results of an actual analysis in Luong Son town 19
Table 4.2.The component of domestic solid waste in Luong Son town 20
Table 4.3 The amount of domestic solid waste generated every day in the town 21
Table 4.4 Population forecast of Luong Son town 24
Table 4.5 The forecast volume of domestic solid waste in Luong Son town to 2020 25
Table 4.6 The rate of gas components generated from landfill 29
Table 4.7 Results of interview sanitation workers in Luong Son town 34
Table 4.8 Results of household interviews on domestic solid waste management 36
Trang 7LIST OF FIGURES
Figure 1.1 Some methods of domestic solid waste treatment 7
Figure 3.1 Map of Luong Son town, Luong Son district, Hoa Binh province 10
Figure 4.1 Sources of domestic solid waste in Luong Son town 18
Figure 4.2 Proportions of different categories of domestic solid waste in Luong Son town 20
Figure 4.3 The volume of domestic solid waste generated in Luong Son town 25
from 2017 to 2020 25
Figure 4.4 Wastewater generated at the landfill in Luong Son town 27
Figure 4.5 The gases are generated during the waste treatment process 28
Figure 4.6 Impact of domestic solid waste on public human health 30
Figure 4.7 The system of domestic solid waste management at Luong Son town 31
Figure 4.8 The model collection and transportation of DSW at Luong Son town 32
Figure 4.9 Waste is being collected by workers on their cart and then transferred into a truck 33
Figure 4.10 Landfill at Luong Son town, Luong Son district, Hoa Binh province 33
Figure 4.11 Waste disposal site at Luong Son town, Luong Son district, Hoa Binh province 33
Trang 8ABSTRACT
Management of domestic solid waste is a major challenge in urban regions of the most part of the world, including Southeast Asia In the past decade, strong economic growth and uncontrolled urbanization have greatly magnified the problems with Vietnam’s domestic solid waste management system Not only has been an increase in the amounts of waste generated, but the composition of the waste has also changed as well
Given the rapid rates of urbanization occurring around the world, the importance of an efficient and effective domestic solid waste management system is more critical than ever before In recent years, Luong Son town has a high economic growth rate with the increase in population, the volume of domestic solid waste rose significantly However, behind the economic benefits of investment projects, the assessment of the effectiveness of solid waste management is becoming a difficult problem to solve in environmental management and protection
Therefore, I selected this study to provide a practical basis for assessment of domestic solid waste management in Luong Son town, Luong Son district, Hoa Binh province From that, proposing solutions to improve the effectiveness of domestic solid waste management in the study area
Trang 9or refuse, sludge from a wastewater treatment plant, resulting from industrial, commercial, mining, agricultural, and from community activities [6]
Domestic solid waste, commonly known as trash or garbage (US), refuse, or rubbish (UK) is a waste type consisting of everyday items that are discarded by the public The organic waste potions consist of food and kitchen waste Inorganic waste consists of paper, plastic, glass, wood, and metal products such as drink cans [12]
1.1.2 The origin of domestic solid waste
The original of domestic solid waste includes:
- Residential area: it generated from household such as paper, cardboard, yard
clippings, wood, plastic, rubber and also some hazardous waste
- Commercial activities: it generated from restaurant, market, hotel or office Waste
sources have the same composition as for residential areas (food, paper, glass )
- The office: it generated from school, administrative agency Waste sources have the
same composition as for residential areas and commercial activities but less volume
- Agricultural activities: it generated from straw, pesticides, manure, and other waste
from the farm, harvest waste or fertilizer
- Construction activities: it generated from brick, stone, gravel
- Industrial activities: it generated from heavy metals like lead, mercury, ore
Trang 10- Hospital and clinic: it generated from activities involving health protection such as
drugs and pharmaceuticals, cleaning and disinfection products, bandages, other plastics,
1.1.3 Classification domestic solid waste
Classification domestic solid waste can be based on many different criteria such as classification by location, by chemical and physical composition, and by the level of hazard
a Classification by location of formation
According to the location of formation: Depending on the location, waste can be divided into municipal solid waste, household waste [4]
- Household waste also known as domestic waste or residential waste is refuse
generated by households
- Municipal solid waste is more commonly known as garbage - consists of everyday
items we use and then throw away, such as product packaging, furniture, bottles, food scraps, newspapers, appliances, This comes from homes, schools, hospitals, and businesses [13]
b Classification by chemical and physical composition
According to chemical and physical composition: According to the chemical nature, wastes can be divided into organic waste, and inorganic waste [4]
- Inorganic waste means waste is composed of all those waste resulting from products
and materials that we use in our daily activities It can be sand, salt, iron, calcium
- Organic waste is an organic material It can also include paper, cardboard, timber,
food, and lawn clippings, etc
c Classification by level of hazard
- Household hazardous solid waste includes waste is flammable, corrosive, containing
radioactive substances or heavy metals [13]
Trang 11- Household non-hazardous solid waste means waste does not contain hazardous, often
waste generated in family activities [13]
1.1.4 The composition of domestic solid waste
Domestic solid waste consists of many different components Information on domestic solid waste composition plays an important role in evaluating, selecting methods and treatment equipment Table 1.1 defines the definition of domestic solid waste
Table 1.1 Definition of the domestic solid waste composition
1 Inflammable substances
a Paper Materials made from paper and pulp Paper bags, toilet paper
b Textiles Originated from the fibres Fabrics, wool, nylon
c Food Food waste from household Fruit shells, corn-cob
d Grass, wood Products made from wood, bamboo Wooden furniture: tables, chairs
e Plastic Products made from plastic Plastic bottles, electric wire
f Leather, rubber Products made from leather and rubber Ball shoe, wallet
Any kind of material non-combustible
and made from glass Bottle, light bulb
Trang 121.2 Impact of domestic solid waste
1.2.1 Impact on the environment
Domestic solid waste can clog plumbing, rivers, which interfere with the flow of
water The water flows through the ponds and lakes that contaminate the surface water
1.2.2 Impact on public health
There are potential risks to environment and health from improper handling of solid wastes Direct health risks concern mainly the workers in this field, who need to be protected There are also specific risks in handling wastes from hospitals and clinics
1.2.3 Impact on the urban landscape
Domestic solid waste that is not collected or transported to the prescribed places will cause environmental issue and effect to the urban landscape
Trang 131.3 The current state of domestic solid waste management
1.3.1 In the world
Around the world, waste generation rates are rising In 2012, the worlds’ cities generated 1.3 billion tons of solid waste per year, amounting to a footprint of 1.2 kilograms per/person/day With rapid population growth and urbanization, municipal waste generation is expected to rise to 2.2 billion tons by 2025
A significant amount of municipal solid waste is burned and converted to energy Overall about 33.1 million tons, or 13%, of municipal solid waste was combusted for energy recovery in 2014, this is down slightly from 34 million tons in 2000 And the rise of recycling, composting, and burning municipal solid waste to produce energy provides significant environmental and economic benefits
1.3.2 In Viet Nam
Recently, Vietnam has faced great challenges in domestic solid waste management including not only the collection, transfer, and final disposal of waste but also a lack of public awareness of the domestic solid waste system The amount of domestic solid waste generated in Vietnam has been increasing steadily over the last decade
According to the 2011 report of the Department of Natural Resources and Environment (DONRE), the amount of municipal solid waste generated in urban areas only increased roughly 10-16% every year from 2007 to 2010 The total volume of urban solid waste generated
in 2007 was 17.682 tons/day and increased to 26.224 tons/day in 2010 And it can be observed that the amount of solid waste generated per capita per day also increased from approximately
0.75 kg/person/day to almost 1.0 kg/person/day
In Luong Son town, Luong Son district, Hoa Binh province, many people live near the waste treatment area in sub-area 10 urgent with the situation of environmental pollution
Trang 14According to Nguyen Hong Bao, secretary of sub-area 10, people live far from more than one kilometre but still suffocate by the air of bad smell.
For this reason, I selected the study to provide a practical basis for assessment of domestic solid waste management at Luong Son town, Luong Son district, Hoa Binh province Therefore, proposing solutions to improve the effectiveness of domestic solid waste management in the study area
1.4 Some methods of treatment domestic solid waste
Figure 1.1 Some methods of domestic solid waste treatment
Table 1.2 Advantages and disadvantages of some methods of domestic solid waste
treatment
Some methods of treatment
domestic solid waste
1 Composting
- It is an easy and natural
biodegradation process that
takes organic wastes i.e
remains of plants and garden
and kitchen waste and turns
into nutrient-rich food for
your plants
- Composting reduces the amount of waste in landfills
- It can be done in-house
- It creates fertile soils
- If done incorrectly, composting can attract pests
Composting Incineration Landfill
Recovery and Recycling Methods of treatment domestic solid waste
Trang 152 Incineration
- Incineration is a type
disposal method in which
municipal solid wastes are
burned at high temperatures
so as-as to convert them into
residue and gaseous
- Ash still needs to be disposed of
3 Landfills
- The landfills are the most
popularly used method of
waste disposal used today
This process of waste
disposal focuses attention on
burying the waste in the land
- It may have every category of domestic solid waste, including hazardous materials
- Methane from decomposition may be captured for energy production
- It is initially cheap, but costs increasing rapidly as place fill up, therefore, expensive to develop the new place
- People must be lined to prevent leachate infiltrating ground or surface water sources
- It brings the risk of health problems
- Waste in the landfill can cause the greenhouse effect
4 Recovery and
Recycling
- The process of taking items
for a specific next use These
discarded items are then
processed to extract or
recover materials and
resources or convert them to
energy in the form of useable
heat, electricity or fuel
- Glass can be melted and shaped into new bottles or jars indefinitely; this requires less energy than making new bottles and jars
re Metals (aluminium is the most common and cost-effective material for recycling; steel is also frequently recycled)
- Recovery and recycling are not always cost effective
- It requires high initial capital
- Products may not be as durable
Trang 16CHAPTER II RESEARCH GOAL AND OBJECTIVES
- Assessing current performance of domestic solid waste management in the study area
- Proposing solutions to improve the effectiveness of domestic solid waste management
in the study area
Trang 17CHAPTER III RESEARCH METHODS 3.1 Study site
Study site includes Luong Son town, Luong Son district, Hoa Binh province Figure 3.1 shows the location of the study site
Figure 3.1 Map of Luong Son town, Luong Son district, Hoa Binh province
3.1.1 Geographical location
Luong Son town is a gateway in the East of Hoa Binh province, adjacent to the capital
of Hanoi and the Northwest of the country It closes to Hoa Lac Hi-Tech Park, Phu Cat urban area and the cultural village of the Vietnamese ethnic groups The town is located in geographical coordinates: from 105o25'14"E to 105o41'25"E and from 20o36'30"N to
20o57'22"N
- Kim Boi and Lac Thuy district in the South
Trang 18- Ky Son district in the West
- Quoc Oai (Ha Noi city) in the North
- My Duc and Chuong My district in the East
The total area of the district is 36,488.85 hectares, divided into 20 administrative units, including 19 communes and 1 town (Cao Dam, Cu Yen, Hoa Son, Hop Hoa, Lam Son, Lien Son, Nhuan Trach, Tan Vinh, Thanh Lap, Tien Son, Truong Son, Trung Son, Tan Thanh, Cao Duong, Hop Chau, Cao Thang, Long Son, Thanh Luong, Hop Thanh and Luong Son town)
In Luong Son town have rich resources and abundant labour resources Luong Son has advantages in geographical location, is the focal point of economic exchanges, cultural - social between Northwest mountains and the Red River delta
3.1.2 Topography
About topography, Luong Son town is in the midland, where is the transition between the delta and mountainous, so the terrain is very diverse The low mountainous terrains are at the height of about 200 - 400m above the sea level and formed by magma, limestone, and terrigenous sediments, with a dense network of rivers and streams
Currently, Luong Son town has a total natural land area of 1,725.61 ha, including agricultural land and forestry land, accounting for 35.47% The soil is mainly red feralite on sedimentary rock, suitable for planting perennial crops, fruit trees, and rice
3.1.3 Climate
Luong Son town climate is a tropical monsoon, with cold winters, less rainfall, hot summer, and heavy rain
- The average temperature of the year is 22.9oC - 23.3oC
- The average rainfall is from 1,520mm to 2,256 mm/year, but unevenly distributed in the year and even in the season is very erratic
Trang 19- Luong Son town has a network of rivers and streams distributed evenly in the communes
It can be seen that the climate, hydrography, and rivers have created favourable conditions for Luong Son to develop agriculture, diversify crops and animals, intensify crops and develop forestry River systems, dams are not only a source of water for living and people's life but also for regulating climate, improving the ecological environment and developing aquatic resources
3.1.4 Resources
- Water resources: The groundwater in Luong Son has a large reserve The water
quality is largely unpolluted and is distributed throughout the district
-Forest resources: The total forest land area is 18,733.19 ha, accounting for 49.68% of
the natural area The natural forest of the district is diverse and rich with many kinds of precious wood But due to human impacts, the forests have lost so much and replaced them with secondary forests
- Mineral resources: There are large reserves of limestone, construction stone, clay,
basalt, and multi-metal ores in the district
3.1.5 Population
The total population of the town is 13.160 people (in 2009) There are 5 ethnic groups in the town, which Muong people make up about 35% of the population, Kinh people make up 64.5% and other ethnic groups account for 5% The labour force is abundant, the number of non-agricultural workers is increasing, the percentage of trained labourers accounts for 55%, which shows that the district has strength in labour resources
Trang 203.1.6 Economy
In 2016, despite the difficulties and challenges, under the leadership of the Party Committee, the supervision of the People's Council, the direction and management of the district People's Committee and efforts of all levels, the branches, people of all classes, business community, the socio-economic of Luong Son district continue to be maintained and developed
3.2 Study methods
3.2.1 Investigating and doing research on the field
The thesis conducted investigation and survey in Luong Son town, Luong Son district, Hoa Binh province to:
- Directly surveying the research area
- Surveying sources of volume and composition of domestic solid waste at Luong Son town, Luong Son district, Hoa Binh province
- Investigating the collection, classification, transportation, and storage of solid waste in the study area
- Selecting households to ensure the objectivity and relativity of the results
- Taking and doing the measurement samples of domestic solid waste to determine the average volume of domestic solid waste in each household Conducting samples weight in 50 households in Luong Son town within 7 days
+ Preparation 10kg weight scale, gloves, masks, waste bags
+ Starting from 15th of July, 2018 to 21st of July, 2018 Every day takes to measure the weight of domestic solid waste in the afternoon The time from 4 pm to 7 pm
+ Recording the volume of domestic solid waste that can be weighed by each household, then take the average result
Trang 21 The formula for calculating the average amount of domestic solid waste in each household:
M 1 = (m 1 + m 2 + m 3 + m 4 + m 5 + m 6 + m 7 )/7
Which: M 1 is the average amount of domestic solid waste per household in 7 days (kg/day)
The formula for calculating the average amount of domestic solid waste in Luong Son town:
M average = (M 1 + M 2 + M 3 + + M 50 ) / 50
Which: M average is the average amount of domestic solid waste in Luong Son town (kg/day)
M 1 , M 2 , M 3 , M 50 is the average amount of domestic solid waste per household in 7 days (kg/day)
+ The results of the survey on the amount of domestic solid waste generated by households in one day are presented in the following table:
Table 3.1 The weight of domestic solid waste generated by households in one day
The number of people
The weight of domestic solid waste (kg/household/day)
Trang 223.2.2 Interview method
a Questionnaire
The questionnaire is a research instrument consisting of a series of questions for gathering information from respondents Questionnaires can be thought of as a kind of written interview In the thesis, using a questionnaire to collect data from a fraction of the population under investigation and the responses were used to provide assessment of the effectiveness of domestic solid waste management at Luong Son town, Luong Son district, Hoa Binh province
In other words, the questionnaire method is found very useful in understanding the field situation and collecting basic quantitative and qualitative information
From the results of investigating the study area, the thesis interviewed local people who live in the sub-zone 10, where is near Hoang Long Investment Limited Company Thesis used interview method to investigate information about the impacts of domestic solid waste on the surrounding environment and public health
In fact, preparing 2 questionnaires, each questionnaire form includes 15 questions
- For household: conducted interviews with 50 households at Luong Son town, Luong Son district, Hoa Binh province, especially people live near in sub-zone 10
- For garbage collector: Interview the garbage collectors at Luong Son town, Luong Son district, Hoa Binh province
The questionnaire related to the current state of physical and socio-economic status, demography, and educational background, information about the pollution situation in Luong Son town
Trang 23b Survey technique
Direct contact (face-to-face) surveys were conducted in the research This method allows researchers to ask more questions, longer questions, more detailed questions, more opened-ended questions and more complicated or technical questions
Interviewee: households and individuals
3.2.3 Method of determining the composition of domestic solid waste
Steps to determine the composition of domestic solid waste in Luong Son town
- Throwing domestic solid waste that has been collected on the floor
- Mixing carefully the domestic solid waste
- Domestic solid waste piled in a cone
- Dividing the cone into 4 equal parts and take two cross sections: (A + C) or (B + D) after that mixing them
- Dividing each cross section (A + C) or (B + D) into two equal parts
- Taking cross sections into two parts, then from each part taking out half a piece (approximate 20 ÷ 30 kg) for physical classification
- Classification domestic solid waste into the following components:
Trang 24+ Biodegradable solid waste: food scraps, rice, vegetables, leave, shell fruit
+ Non-biodegradable solid waste: plastic, brick, paper, glass, cloth, sandy soil
- Using the weight to determine the volume of each type and proportion
3.2.4 Statistical methods and data analysis
To conduct this study, the survey uses the method of data processing by Excel software
In addition, using some calculation methods such as:
a The amount of domestic solid waste generated is calculated according to the formula
M = I x N
M: Volume of waste (kg/day)
N: Population of the year (person)
I: Average waste generated (kg /person/day)
b The formula for calculating the amount of domestic solid waste generated in a year
M =
(tons)
M: Volume of waste in a year (tons/year)
N: Population of the year (person)
R: Waste generated (kg/person/day)
Trang 25CHAPTER IV RESULTS AND DISCUSSIONS
4.1 Current situation of domestic solid waste at Luong Son town, Luong Son district, Hoa Binh province
4.1.1 Sources of domestic solid waste in Luong Son town
Recently, the socio-economic development associated with the formation of new rural areas and standard living of people has been improved, therefore, the volume of domestic solid waste is increasing rapidly in Luong Son town
The sources of domestic solid waste are shown in figure 4.1
(Sources: Nguyen Thi Hieu, 2018)
The survey shows that domestic solid waste in Luong Son town, Luong Son district, Hoa Binh province is generated mainly from households, services, markets, industrial parks, offices and schools, hospitals and clinics
- The domestic solid waste from households, markets, services, offices and schools include mostly left-over or spoiled food, falling, leaves, spoiled fruits
- The domestic solid waste from industrial parks includes metal or rubber, paper, leather, glass, ceramics
Domestic solid waste
Households
Services
Offices and schools Hospitals and clinics
Trang 26- The domestic solid waste from hospitals and clinics include syringes, bandages, medical instruments
The composition of domestic solid waste fluctuates according to a few factors:
- Population
- Socio-economic conditions
- People's awareness, etc
Analytical sampling results (20kg of solid waste) the composition of domestic solid waste in Luong Son town The results are presented in table 4.1
Table 4.1 The composition of domestic solid waste calculated according to the results of
an actual analysis in Luong Son town
Percentage
Weight (kg)
Percentage (%)
1 Food scraps, rice 1.0 16.67% Coal slag 1.5 10.7%
(Sources: Nguyen Thi Hieu, 2018)
The components of domestic solid waste after the investigation are shown in table 4.2
Trang 27Table 4.2.The component of domestic solid waste in Luong Son town
Ordinal
number
1 Biodegradable solid waste (food scraps, rice, vegetable ) 27.5%
2 Non-biodegradable solid waste (plastic bottles, nylon bags ) 70%
3 Hazardous solid waste (battery, medical instruments ) 1%
(Sources: Nguyen Thi Hieu, 2018)
Figure 4.2 Proportions of different categories of domestic solid waste in Luong Son town
From this pie chart, it can be clearly seen that the domestic solid waste of Luong Son town is diverse in composition However, the largest proportion is a non-biodegradable solid waste (70%) The components of non-biodegradable domestic solid wastes consist of plastic materials, brick, paper, glass, cloth, and sandy soil If non-biodegradable solid waste can be
27.5%
70%
1% 1.5%
The component of domestic solid waste in Luong Son town
Biodegradable solid waste Non-biodegradable solid waste
Hazardous solid waste Others