Environmental Hazards of an Unrecultivated Liquid Waste Disposal Site on Soil and Groundwater

Disposal sites without adequate engineering controls pose a significant risk to the environment. In the present study, the environmental hazards of an abandoned and unrecultivated liquid waste disposal are investigated with a special focus on soil and shallow groundwater contamination. After a period of operation from 1994 to 2010, when the wastewater collection of the municipality was regulated, the disposal site was subsequently decommissioned without further action. Eight monitoring wells have been established in the disposal basins and in the surrounding area to determine the contamination of the site. Sampling took place in the summers of 2020 and 2021. The results of the analysis of the soil and water samples collected showed a high level of contamination in the area. In the borehole profile of the infiltration basin, a well-developed leachate nitrate profile was observed, with a concentration above 3000 mg/kg NO3−. The soil phosphate content was also significant, with a value of over 1900 mg/kg in the upper 40 cm layer. Extremely high concentrations of ammonium (>45 mg/L) and organic matter (>90 mg/L) were detected in the groundwater of the basins, indicating that contaminated soil remains a major source of pollutants more than 10 years after closure. For all micro- and macroelements present in detectable concentrations, a significant increase was observed in the infiltration basin. Our results have revealed that the surroundings are also heavily contaminated. NO3− concentrations above the contamination limit were measured outside the basins. Recultivation of liquid waste disposal sites of similar characteristics is therefore strongly recommended.

Innovative Wastewater Treatment Technologies for Resource-Saving Activities of Feed Mills

Introduction. National economies are looking for tools to activate the explicit and hidden resource potential. Innovative resource-saving projects are such a tool. Feed production strives to increase its resource efficiency. Study objects and methods. The present research featured the feed industry of the Russian Federation and regional feed mills. It involved structural, functional, and systematic approaches and standard research methods. Results and discussion. Liquid waste proved to be an important resource potential of modern feed production. It contains substances with high nutritional, biological, and energy value and can be used to produce methionine. The experimental part featured an industrial enterprise in the Voronezh region, which expects to produce 1452 tons of methionine worth 58 080 thousand rubles. The profitability will be 616.76%, the gross return on sales − 86.1%, the payback time – 1.44 months, the efficiency of capital investments – 8.45. Conclusion. The innovative project will reduce the negative impact on the environment, increase the resource efficiency of the enterprise, and provide additional income.

Determination of rice husk activated Carbon capacity in adsorption of Cu Metal from Sasirangan liquid waste based on isotherm model

The process of manufacturing Sasirangan - a traditional fabric of South Kalimantan - has an impact that affects environmental pollution, namely the dyeing process of the fabric. The synthetic dyes used contain heavy metals and one of those toxic metals is copper (Cu). This study aims to determine the adsorption capacity of rice husk activated carbon adsorbent by adjusting the adsorption pattern based on isotherm models as the treatment to sasirangan liquid waste. The method consists of three stages: preparation of adsorbent by carbonization process, chemical and physical activation, then continued by adsorption process of Cu metal with carbon from rice husks with variations of adsorbent dose (2, 4, and 6 grams). This treatment was conducted by batch process. In this reseach, the adsorption capacity of rice husk adsorbent towards heavy metal Cu in sasirangan liquid waste was determined from the equilibrium state with the Langmuir isotherm equation and Freundlich isotherm equation. Based on isothermal studies of adsorption data, the correlation coefficient values obtained from the isotherm model approaches are: for dose of 2 grams adsorbent, Langmuir R2 = 0.9991 and Freundlich R2 = 0.9981; for dose of 4 grams adsorbent, Langmuir R2 = 0.9992 and Freundlich R2 = 0.9989; for dose of 6 grams adsorbent, Langmuir R2 = 0.9990 and Freundlich R2 = 0.9986. The results of investigation indicate that adsorption data correlated well with Langmuir isotherm model.

A new trend on sustainable animal production

A sustainable animal production can improve the efficiency of animal production and recycle of animal waste, and reduce greenhouse gas emissions. It can be achieved by firstly, properly operation of animal production, such as improvement by animal breeding, synthesis of amino acids, improvement by animal nutrition, good housing design, phase feeding system, liquid feeding system, using left over of one day bakery and biscuit factory, left over of vegetable and fruit market, new methods to plant Leucaena or mulberry to feed goats, grass or fodder plant in hydroponic house for sustainable farming. Secondly, good waste management, such as transferring waste to no contaminant material and even to useful material, reduction of greenhouse gas emissions, liquid waste management, and solid waste treatment. All these subjects also need to consider the interaction between knowledge, e.g. breeding and nutrition need to consider about environmental temperature factors; waste management needs to consider about nutrient requirement by vegetable, fruit, etc. A sustainable animal production is a kind of science integrated different knowledge together, then you can achieve some good results.

Utilization of ionic liquid for ICP-OES based trace metal assay in thorium matrix for decrease in liquid organic waste, cost, human exposure and time of analysis

Ionic liquid based 'Green" separation methodology was used for drastic reduction in organic phase requirement, generation of organic liquid waste, time of analysis, personal exposure towards radiotoxic environment, less chances...

Pengaruh Berat Karbon Aktif Kulit Jagung terhadap Penurunan COD (Chemical Oxygen Demand) Limbah Cair Industri Batik

Background: The batik industry produces chemical waste with a COD value of 1918 mg/l; (above the safe threshold of 150 mg/l). One of the wastewater treatment methods is using activated carbon, including corn husks. This study aims to determine the effect of the weight of corn husk activated carbon on the reduction of COD in batik industrial wastewater. Methods: A quasi-experimental study with a non-randomized pretest-posttest control group design using liquid waste from one of the batik industries in Rejomulyo Village, East Semarang District. This experiment applied five weight variations of corn husk activated carbon, namely 10, 20, 30, 40 and 50 grams with 4 repetitions, and 4 control samples. The effect of the treatment was observed in 50 minutes. The observations were analyzed using the Kruskal-Wallis statistical test. Results: The range and mean COD values before and after treatment were 3174.32 -5136.43 mg/l, and 584.29 - 1049.20 mg/l, respectively. The decrease in COD according to treatment ranged from 80.83% to 84.76%, while in the control group it was only 2.90%. There was an effect of the weight of corn husk activated carbon to decrease COD of batik industrial wastewater (p = 0.015), and there was an effect of the weight of corn husk activated carbon to decrease COD of batik industrial wastewater between control group and treatment group (p = 0.021). Conclusion: Corn husk activated carbon has a high potential to reduce the COD of chemical waste in the batik industry.

The effect of combination of AB-mix nutrition with liquid organic fertilizer of tofu liquid waste on hydroponical growth and production of lettage (Lactuca sativa L.)

This study aims to determine the effect of the combination of AB mix nutrients with liquid organic fertilizer (LOF) of tofu liquid waste on the growth and yield of lettuce plants and to obtain the best combination for the growth and yield of lettuce hydroponically. This study used a non-factorial Randomized Block Design (RBD), consisting of a comparison of nutritional treatments, namely: N1 = 100% AB mix + 0% LOF of liquid waste tofu, N2= 75% AB mix + 25% LOF of tofu liquid waste, N3= 50% AB mix + 50% LOF of tofu liquid waste, N4= 25% AB mix + 75 % LOF of tofu liquid waste, N5= 100% LOF of waste liquid tofu which consists of 4 replications. Parameters observed were plant height, number of leaves, leaf length, leaf width, root length, fresh weight, root volume and weight fit for consumption. The results showed that the administration of 50% AB mix + 50% LOF of tofu liquid waste and 25% AB mix + 75% LOF of tofu liquid waste showed results that tended to be the same but the results of the combination of 75% AB mix + 25% LOF of tofu liquid waste were higher. On the parameters of the number of leaves is 11.12 strands, fresh weight is 66.40 g and suitable weight for consumption is 58.31 g.

Potensi Culex quinquefasciatus sebagai Vektor Filariasis dan Kondisi Lingkungan di Kota Pekalongan

Pekalongan City was still an endemic area of Lymphatic Filariasis (LF). Twice cycles ofMass Drug Administration (MDA) had been implemented, but the Microfi laria rate (Mf rate) wasstill more than 1%. This observational research aimed to study the potential of Culex quinquefasciatusas a vector of LF in Pekalongan City. A Cross-sectional design was chosen as an approach in compilinginformation related to environmental factors and mosquitoes. The population of this research washouses located in Jenggot and Kertoharjo village with thirty-one houses, located around fi lariasiscases, purposively selected as samples. Variables studied in this research were environmental factorsand mosquito vectors. Data collection using observation, and laboratory examination throughmosquito dissection. Data would be analyzed descriptively. This study found that there were 8 Culexquinquefasciatus tested positive L3 fi larial worm (infective rate 4.39%). There were 74.2% of houseshad mosquitoes’ breeding sites around them. The breeding sites were found at domestic waste disposal,drainage in front of the house, and infi ltration well for liquid waste. As much as 86.2% of the breedingsites contained mosquito larvae. This research concluded that Cx. quinquefasciatus was confi rmedpositive fi laria worm thus establish as mosquito vector for Lymphatic Filariasis in Pekalongan City.The breeding sites related to the mosquito development were small water bodies, drainage in front ofand around the house.