CHARACTERISTICS AND HOUSEHOLD TOXIC HAZARDOUS WASTE GENERATION BASED ON ECONOMIC STATUS AND TOPOGRAPHIC REGIONS IN SEMARANG CITY, INDONESIA

Hazardous and toxic waste are not only produced by industry, but also by households. But in fact, the household activities also produce Household Toxic and Hazardous Waste (HTHW). Considering the potential of the impact of HTHW to worsening environment quality, the effort of HTHW management must have been started well. One important aspect in the management strategy is to determine the characteristics and the HTHW generation. The method used to determine the characteristics HTHW refers to SNI 19–2454–2002, while the calculation of HTHW generation refers to the SNI 19–3694–1994 calculated based on weight and volume. Sampling was conducted in four districts of Semarang (Pedurungan, Semarang Barat, Semarang Utara and Banyumanik). The samples used in this study were 400 families that were selected based on the proportion of Slovin Formula. Data analysis performed using Analysis of Variance (ANOVA) and Kruskal-Walis test (α = 0.05). The largest characteristic of HTHW in Semarang City is infectious (79%), further Poisonous (13%), Combustible (6%) and Corrosive (2%). While HTHW generation is 0.01 kg/person/day (5.1% MSW). Statistical test result showed there was a significant difference (p-value : 0.001) between HTHW generation based on economic level, but there was no significant difference (p-value :0.442) between HTHW characteristics in Semarang city. The level of education, occupation, income level and lifestyle may become potential factors in differentiating the characteristics and HTHW generation in Semarang city.


INTRODUCTION
The escalation of society needs will increase the waste produced. It is included in household toxic hazardous waste (HTHW). Nowadays, the industrial sector is considered as the hazardous and toxic material resource. In fact, the household activities also produce HTHW. Waste disposal in the society settlement is not much. Due to huge population and there is no special treatment, it will seriously cause danger for the environment and human health.
Generally, people in cities (85,3%) mix all components of household waste, including HTHW. Many people do not know that household activities can produce dangerous waste and endanger health and surrounding environment (Fikri et al., 2014;Fikri et al., 2016). Although the existence household hazardous waste in the waste appearance from city people is relatively small, but with the increasing population, the amount of waste generated will also increase.
The impact of HTHW is accumulated in the water and soil annually. For example, in the re-search conducted by Tuthill et al (1987) dan Ololade et al (2009) the sample shows result containing Pb, Ni, Cd and also the increase of physic parameter concentration and chemical such as pH, turbidity, conductivity and phosphate Ololade et al., 2009). Considering the potential of the impact of HTHW, it would require proper management. One aspect that is important as the first step is to develop guidelines and HTHW management strategy is to determine the characteristics and HTHW generation.

Research Sites
The study was conducted in the Semarang City (Indonesia), Semarang lies between 6°50' -7°10' of south latitude and line 109°35 -110°50' of east longitude. The west border is Kendal Regency, the east border is Demak Regency, the south border is Semarang Regency, and the north is Java Ocean with the length of 13,6 km.

The Sample of the Research
The calculation of the total of the research sample was calculated by using Slovin formula (Sevila, 1990;Rivera, 2007;Ryan, 2013). Based on the calculation result, there are 400 families which are used as the sample of the research. The next step is determining the sample of the location in Semarang City by using Stratified Proportional Sampling Method (based on economy level and the geography condition of Semarang City). The proportion of the number of respondent which will be used as the sample is presented in Table 1.

HTHW Generation
HTHW generation is based on Indonesian National Standard (SNI 19-3694-1994) and was conducted for 32 consecutive days for four districts in the Semarang City.

HTHW characteristics
Sampling was done by the separation of organic waste and HTHW. After the separation, followed by identification of characteristic/composition HTHW based attachment Indonesian National Standard SNI 19-2454SNI 19- -2002.

Data Analysis
Data analysis using ANOVA with 95% confidence level (α = 5%) using SPSS software version 20. HTHW generation based on economic strata showed a significant difference. The upper economic strata groups produce HTHW of 0,014 kg/person/day (7.10% MSW), middle economic strata 0,008 kg/person/day (3.48% MSW) and lower economic strata 0,003 kg/ person/day (3.34% MSW). Total generation HTHW on upper economic strata 2.04 times higher than the middle economic strata and 2.13 times higher compared to the lower economic strata. The descriptive difference was based on ANOVA test with pvalue each 0.001 and 0.015. Therefore, the result showed the significant difference (p-value < 0.05) between generations HTHW based on economic level in Semarang City. Table 2 shows the characteristics of HTHW in Semarang divided into 4 types: corrosive, combustible, poisonous and infectious. Sampling results to identify the characteristics of HTHW in Semarang city indicate that HTHW generation: corrosive (0.0002 kg/person/day), combustible (0.0006 kg/person/day), poisonous (0.0018 kg/person/ day) and infectious (0.0074 kg/person/day).

HTHW Characteristics
Based on the descriptive analysis in Figure 4, the domination characteristics of HTHW based on the measurement of weight scale was infectious group with 79%, and then poisonous group 13%, combustible 6%, and the last corrosive with 2% percentage.
From the sampling result there should be a serious concern to manage infectious group of HTHW. Until now, there is no stated regulation including in SNI 19-2454SNI 19- -2002. Revision is needed in that SNI. In this research, HTHW infectious group was included in the analyses based on the effect on health (infection spreading) that would be caused and the degrading of environment quality. This background was sup-  (2006) confirm the statement "waste segregation at the source itself is extremely important as municipal solid waste turn hazardous when mixed with hazardous waste such as paint, dyes, batteries and human excreta". So it is clear that the addition of one (1) characteristics/category HTHW as "infectious" is one that is relevant, both from a quantitative and health impacts and environmental degradation.
Based on the sampling results of the 400 families within 32 days in the city, HTHW with the characteristics of "infectious" the most dominant and commonly found types of diapers, bandages, gauze, some condoms, and plabot former  infusion. The diversity of the characteristics of HTHW in Pedurungan found in the district which is a region on a sample group of economic strata. Different characteristics HTHW based economic strata, do not mean the same with different characteristics based on HTHW topography. The statistical results using Kruskal-Walis test showed no differences in the characteristics HTHW based topographic regions (p-value 0.442). So that the test results can be interpreted to have simi-lar characteristics to HTHW based topographic regions in Semarang.

Comparison with Other Countries
Previous research found in seven (7) different countries, including: India, Vietnam, Switzerland, Mexico, Greece, the UK and Hungary. For example, research conducted by Lakshmikantha & Lakshminarasimaiah (2007) in the State of  Based on the comparison of HTHW generation in India, Vietnam, Switzerland, Mexico, Greece, the UK and Hungary has been described previously, indicating generation HTHW in Semarang higher than in the country of India, Vietnam, Switzerland and Mexico, but is smaller when compared to the generation of HTHW in Greece, England and Hungary. This indicates   Table 3 shows that the percentage HTHW in Semarang is similar to research done by Tuthill et al (1987) in Massachusetts, USA with a percentage of 5.7% . But in the results of this study it is lower than that of Ziaee et al (2012) in the city of Tehran that its HTHW percentage reaches 10% of the domestic waste (Ziaee et al., 2012).

Factors that affect the generation and characteristics HTHW based on respondents characteristics
Based on the condition respondent characteristics, there are some characteristics that may affect the characteristics and generation of HTHW in Semarang. Respondent characteristics are reflected in some social parameters, including the level of education, occupation, income and life style. These factors will relate to one another for mutual influence. It is also similar to that disclosed by Tchobanoglous et al (1993) which states that the factors which affect the characteristics and solid waste generation is natural and human factors, human factors consist of activity level, lifestyle, and economic conditions.
One of the factors that affect the characteristics and generation of HTHW in Semarang is related to the education level of respondents. Respondents who live in the upper economic strata (the District Pedurungan) most bachelor degree (30.4%) and also includes a master (4.6%) which is higher education, whereas in the middle economic strata (District of Semarang Barat) 7, 0%, and only 3.9% in the lower economic strata (District of Semarang Utara). The level of education is important because it can change the perception of knowledge, attitudes and behavior in dealing with garbage (Ramandhani, 2011). Not only that, the level of education will also produce considerations and affect the purchasing power of a product, including products that are hazardous waste which will have implications on the characteristics and HTHW generation.
Someone is going to affect the level of education obtained employment (Atmasari, 2011). The results of interviews with respondents showed that respondents who live in upper economic strata (the District Pedurungan) are largely self-employed (25.7%), Semarang Barat (20.2%) and Semarang Utara (19.5%). The work has a very big role in human life, both in relation to oneself, with others and with society in which he lived. Economically, peo- ple who work or will earn money that can be used to meet the personal needs of daily (Udin, 2010). The fulfillment of these needs, of course, should not be separated from the product which is hazardous waste.
Self-employed jobs tend to be more open to the environment and receive technological development. The technological development led to the assimilation of information and a strong media advertising to influence someone to buy a product, and one of them is a product which is hazardous waste. Technological developments are also related to product packaging, according Damanhuri (2010) product packaging materials daily necessities will affect the composition of the waste produced, is no exception HTHW (Damanhuri, 2010).
These results correlated with different income levels based on economic strata. On the upper economic strata (sub-district Pedurungan) the average respondent income IDR.3.000.000-5.000.000, -is 15.6%, Semarang Barat (8.5%) and Semarang Utara (1, 3%). The level of education is one of the factors that affect revenue (Putri, 2013). People who have higher levels of education would earn a better income. Education becomes a vehicle that bridges the gap between the level of education that has been achieved with the level of education desired / required to achieve a goal, in addition to the education level of income is also affected by the type of work.
This type of work is also one of the factors that affect revenue (Cahyono, 2006). Education someone very influential on the type of work, if the higher education, the type of work would be higher and it will affect the person's earned income. In addition, the type of work a person will be in accordance with the skills possessed. There-fore, the level of education and skills greatly affect the type of work.
Related to the difference in income based on the economic strata and generation HTHW, different income levels determine the types of homes and settlements to be populated. According to Sumardi & Hans (1982), there is a correlation between the quality of the housing with the ability to build (which is related to income levels). The higher the level of income, the ability to build quality housing, the better, and vice versa (Sumardi, 1982). It is proved that the revenue (income) community is one of the factors that affect the amount of HTHW generation. Tendensinya, the higher one's income, the more HTHW caused. This is due, among others, to more numerous and diverse activities of life, increases the complete necessities of life, and lifestyle (Dewilda et al., 2014), to determine the composition and HTHW based revenue (economic strata) are expected HTHW management system can be determined according to the precise area targets and problems in the management HTHW can be prevented and it is anticipated as early as possible directly at the source.
Factors that have been previously described, is also on the life style factors (consumer culture) that will continue to thrive in the community. One example is the use of disposable diapers, which is now no longer a luxury, but has become a basic requirement replaces cloth diapers (cloth diapers) because it was considered more practical. The culture of consumerism is a problem and will remain rooted in the community.
HTHW generation in a city will increase from year to year. That is because an increase in quality of life, so that the patterns of consumption will increase as well. Humans will never be satisfied in meeting their needs, the purchasing power of an Hangzhou, China 0.05 [18] item or food will continue to increase. The increase in consumption pattern that causes waste generated will increase. The number or volume of waste will be proportional to the level of consumption of goods or materials are used in everyday life. Similarly, the type of waste, is highly dependent on the type of material consumed. Based on these descriptions, the factors that affect the generation HTHW in Semarang presented in Figure 6.
Benefits of HTHW generation of data needed to determine the amount of HTHW that must be managed and constituents of the waste management system alternative solutions that efficiently and effectively. The study on data on HTHW generation is the first step done in (Tchobagnolous, 1983). Moreover, the goal is known as the generation HTHW generation forecast HTHW generated for the present and the future and serve as the basis of planning and design management system (Tchobagnolous, 1983).
In managing urban HTHW, not only should the government be active in providing regulatory and handle HTHW, but also takes an active role public awareness and to participate in cooperation with the government in managing the HTHW. Paradigm on the responsibility of managing the waste that is focused on the government to be changed. Another paradigm that must be changed is the garbage fees that are regularly paid by the residents as a reason to remove the responsibility to manage their own waste. The garbage fees can be used as a reason to throw the whole responsibility to officers or city office trash in waste management.

CONCLUSIONS
1) The analysis by weight showed HTHW generation reached 0.01 kg/person/day or 5.1% of total domestic waste. HTHW generation of significant differences indicated by economic levels (upper, middle and lower) as well as the topography of the area in the city of Semarang. In addition, the results of the analysis of generation HTHW by volume can be used as a reference for other cities in developing countries such as Indonesia.
2) The characteristics of HTHW in Semarang consist of corrosive, combustible, poisonous, and infectious. The largest characteristic of HTHW in Semarang is Infectious.
The proportion of the order did not differ between the waste produced household groups with middle to upper economic levels and the groups of households with lower economic level. Only the characteristics of the resulting HTHW household groups with the economic level of more diverse kinds of economic level than the middle and lower economic levels.