<p>One of the organic waste treatment using the bioconversion process of the Black Soldier Fly larvae or commonly called Maggot. This study aims to determine the total amount of waste produced from bioconversion and to determine the effect of variable type of waste on Maggot growth. The types of samples used are household waste, melon waste, chicory waste and tofu waste as a control. The research method uses the True Experimental Design method with the Posttest Only Control Design research design. The study began with hatching of 1 gram Black Soldier Fly eggs which were then incubated for four days. Analysis of the study was conducted when Maggot was 7 days old with the number of feeding varied per feed. The results showed that total organic waste decomposed varied in each sample, namely the average total waste of 8122.1 grams, 1859.7 grams, 1320.3 grams and 1683.3 grams. The percentage of waste showed 74.6% for samples without mashed and 87.1% for mashed samples. The type of waste gives a significant influence on the growth of Maggot the value of sig. 0.024 (sig. P value &lt;sig. Value)</p>

Society services activity in kitchen waste management system has been implemented to the owner of restaurant and catering work in Tasikmalaya City area. This activity has colaborated with Indonesian Catering Associations (APJI). The rapid growth of restaurant and catering activities has created serious problems of energy requirement, water, and solid waste disposal. Less information and limited area become the problems in handling of kitchen waste. A simple technique is needed to overcome the environmental problem which is caused by kitchen waste. The components of kitchen waste include vegetables, peelings, fruit skins, spoilt fruit, cooked and uncooked meat, bones, fats, egg-shells, bread and pastries, cooked food waste, etc. Due to a high organic content, bioconversion technologies such as anaerobic digestion are more suitable to handle the waste convert to biogas. It would be reducing the LPG usage. For the kitchen wastewater, grease trap as pre-treatment followed by a physical and biological process is one of a simple process which can produce the effluent in accordance with government standard. The activities were continued by the socialization of 3R program (reuse, reduce, recycle) by doing demo utilization of kitchen solid waste such as packing material, mineral water bottle is made a handicraft. Knowledge transfer run well and the enthusiasm of the participants in following the activity were very good.

Problems arising from laboratory waste include the content of lead metal ions in it, which can affect health. While on the other hand, Jengkol peel is a market waste and has no economic value. Jengkol peel contains hydroxyl groups and carboxylates to bind heavy metals such as lead (II) ions. So, this study aims to determine the effect of variations in flow rate, adsorbent height, and solution acidity and determine the ability of Jengkol peel in adsorbing lead (II) ions in the laboratory liquid by the column method. Organic groups that include active sides can be removed using 1N sodium hydroxide to increase the adsorption ability. Sodium hydroxide functions to dissolve lignin in lignocellulose compounds so that carboxylic groups are formed in cellulose, which has a role in binding metal ions. The determination of functional groups was carried out by Fourier-transform Infrared Spectroscopy. The identification of the adsorbent morphology was carried out by Scanning Electron Microscope. The adsorption of lead (II) ions by Jengkol peel was determined by calculating the difference between the lead (II) ions in the solution after and before passing through the column. The amount of lead metal remaining in solution was determined using Atomic Absorption Spectroscopy. Sodium hydroxide solution with a concentration of 1N can separate lignin from cellulose contained in lignocellulose to enhance the bio-sorbent ability of the Jengkol peel in binding metal ions. The smaller the flow rate in the column, the higher the amount of lead (II) ions adsorbed in the bio-sorbent. The acidity of the solution has the best adsorption at pH 5. The metal ions from the simulation sample can reduce the number of lead (II) metal ions adsorbed by 11%.

The composition of waste in Indonesia is dominated by organic waste. The waste processing process must be improved to prevent pollution in the market environment. The bioconversion process using Black Soldier Fly larvae or maggots is an effective way to process organic waste. The aim of this study was to determine the effect of feeding on the initial maggot biomass to the addition of the final maggot biomass, determine the maximum maggot weight and determine substrate consumption. This quantitative research used a completely randomized design method consist of five treatments and four replications. The various feeding between total feed and larva were A treatment (270 gram: 150 gram), B (210 gram : 150 gram), C (150 gram : 150 gram), D ( 90 gram : 150 gram) and E ( 30 gram : 150 gras). The data analysis technique used variance test and Duncan’s mean difference test. The result showed that the addition of coconut pulp feed affects to the final weight of the maggot and the value of substrate consumption. The addition of coconut dregs feed which maximally affects to the final weight of the maggot showed in A treatment which ratio coconut dregs: larva (270 gram : 150 gram). The A treatment gave an average final weight of maggot 195 grams in 18 days. The maximum reduction of coconut dregs in the bioconversion process was observed in treatment E with a substrate consumption value of 55%.

The use of activated charcoal from sawdust as an adsorbent of tetracycline hydrochloride compounds has been successfully carried out. Sawdust activated charcoal was carbonized at 450°C for 40 minutes with a charcoal size of 100 mesh and activated using H3PO4 solution. The characteristics of active sawdust charcoal showed that water content, iodine adsorption, and methylene blue adsorption had met SNI 06-3730-1995 regarding technical activated charcoal. Testing the morphology of charcoal using a Scanning Electron Microscope showed that the charcoal pores were opened through the activation process. In the functional group analysis test using infrared spectroscopy, the active group contained in charcoal after being activated contained carbon atoms that were purer than sawdust. The adsorption process of tetracycline hydrochloride using sawdust activated charcoal is known to follow Ho orPseudo second-order (K = 0.0039 g/mg.min), while the adsorption isotherm follows the Langmuir equation, KL = 0.0076 L/mg and adsorption capacity amounting to 242.1307 mg/g. Thermodynamically, the adsorption process occurs not spontaneously with a Gibbs free energy value of 120.8949 kJ/mol and occurs by chemisorption.