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Ind. Domest. Waste Manag. , Vol. 2 Iss. 1 (2022) – 5 articles

			View Vol. 2 Iss. 1 (2022)
DOI: https://doi.org/10.53623/idwm.v2i1
Published: 1 June 2022
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Adsorption of Phosphorus Using Cockle Shell Waste
by Natasya Binti Mohd Zain, Nurul Jannah Md Salleh, Nurul Fatihah Hisamuddin, Shazana Hashim, Noorul Hudai Abdullah

Ind. Domest. Waste Manag. 2022, 2(1), pp 30-38; https://doi.org/10.53623/idwm.v2i1.81

321 views
This study aims at isolating bacteria capable of producing lysine from decayed banana and pineapple fruits, screening the bacteria for lysine accumulation, and producing lysine in a submerged medium using active isolates. Lysine is one of the potential amino acids not synthesized biologically in the body. It is nutritionally important to man and animals and can be used to supplement food and food materials especially cereal products, to improve protein quality. The banana and pineapple fruits were purchased from 'New market' in Amorji-nike, Enugu State, a total of 10 fruits were used. Some pieces of decayed tissues from the banana and pineapple fruits were transferred by means of sterile techniques, to the nutrient agar contained in covered dishes (Petri-dishes) and incubated at room temperature. The plates were identified by biochemical tests. The bacteria isolated from the decayed banana and pineapple fruits were Pseudomonas species, Corynebacterium species, Staphylococcus aureus, Bacillus species, Escherichia coli, Acetobacter aceti, Erwinia herbicola, and Gluconobacter oxydans. Only two of these bacteria were indicated as lysine producers, and they are Bacillus spp and Acetobacter aceti. Full text


Study of Household Waste Management and Recycling Awareness Between Residential Areas in Kuala Nerang, Kedah, Malaysia
by Husna Abdul Halim, Mohamed Zuhaili Mohamed Najib, Muzaffar Zainal Abideen, Hazlami Fikri Basri, Khalida Muda

Ind. Domest. Waste Manag. 2022, 2(1), pp 39-45; https://doi.org/10.53623/idwm.v2i1.70

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This paper presents a study on household waste management and recycling awareness. Residential areas are the major sources of solid waste as that is where people live. The waste that is usually disposed of from residential areas includes food waste, plastic waste, paper, glass, tin, and others. The increasing trend in waste generated from homes has become a major concern. This study aimed to assess household waste management and recycling awareness in two residential areas located in Padang Terap District, Kuala Nerang, Kedah, Malaysia. Recently, Padang Terap district showed an increase in waste generated compared to another district, Kedah. An open-ended questionnaire was distributed to approximately 32 respondents, and an interview was conducted to study household waste management and recycling awareness in two residential areas—Taman Jati and Taman Pelangi. The research shows that household waste management to segregate the waste remains a problem, despite most respondents being aware of this issue through different media. Furthermore, the lack of household waste management and recycling programs and facilities by the local authorities caused residents to be reluctant to practice these activities. Full text


Tolerance of Earthworms in Soil Contaminated with Polycyclic Aromatic Hydrocarbon
by Rubiyatno, Zee Chuang Teh, Diah Velentina Lestari, Arma Yulisa, Muthah Musa, Tse-Wei Chen, Noura M. Darwish, Bandar M. AlMunqedhi, Tony Hadibarata

Ind. Domest. Waste Manag. 2022, 2(1), pp 9-16; https://doi.org/10.53623/idwm.v2i1.62

337 views
Pyrene is a very resistant polycyclic aromatic hydrocarbon (PAH) with four benzene rings that survives in the environment. This study was aimed at investigating the tolerance of earthworms in soil contaminated with pyrene. The studies were performed by employing earthworms gathered from shady regions adjacent to sewage ponds as pyrene degraders to eradicate pyrene from the soil. Numerous factors affecting pyrene degradation efficiency were explored, including the effect of contaminant concentration, earthworm and soil ration, and soil condition. The highest pyrene removal (31.2%) was shown by earthworms in the condition of soil mixed with cow dung. Pyrene decomposition was inhibited during soil sterilization due to the absence of soil microorganisms and indigenous pyrene-degrading bacteria. Nonetheless, earthworms are suitable for use as pyrene degraders in contaminated soil. Full text


Effect of Substrate-to-Inoculum Ratio and Temperatures During the Start-up of Anaerobic Digestion of Fish Waste
by Arma Yulisa, Chayanee Chairattanawat, Sang Hyeok Park, Md Abu Hanifa Jannat, Seokhwan Hwang

Ind. Domest. Waste Manag. 2022, 2(1), pp 17-29; https://doi.org/10.53623/idwm.v2i1.80

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The high protein and lipid content of fish waste makes mono-digestion a difficult bioprocess for an anaerobic digestion (AD) system. On the other hand, the massive increase in fish and seafood consumption worldwide has led to an inevitable fish waste mono-AD. Therefore, this study was conducted to investigate the effects of food-to-microorganisms (F/M) ratios and temperatures during the start-up period of fish waste mono-digestion. F/M ratios of 0.5, 1, 2, and 3 on a g-COD/g-VSS basis were operated at 35°C and 45°C, representing mesophilic and hyper-mesophilic conditions, respectively. The increase in F/M ratio improved the maximum methane (CH4) production rate at both temperatures. However, F/M ratio of 0.5 generated the highest CH4 yield in mesophilic and hyper-mesophilic conditions (0.23±0.00 L-CH4/g-CODinput). Further increase in F/M ratio decreased CH4 yield up to 21.74% and 39.13% when the reactors were operated at 35°C and 45°C, respectively. When reactors were supplied with FM ratios of 0.5, 1, and 2, hyper-mesophilic temperature improved methanogenesis by up to 2.61% and shortened the lag phase by 22.88%. Meanwhile, F/M ratio 3 at 45°C decreased cumulative CH4 production by up to 26.57% and prolonged the lag phase by 10.19%. The result of this study is beneficial to managing the input substrate of a batch-AD system that treats fish waste as a sole substrate. Full text


Removal of Cresol Red by Adsorption Using Wastepaper
by Mohamad Salman, Muslum Demir, Kuok Ho Daniel Tang, Linh Thi Thuy Cao, Seng Bunrith, Tse-Wei Chen, Noura M. Darwish, Bandar M. AlMunqedhi, Tony Hadibarata

Ind. Domest. Waste Manag. 2022, 2(1), pp 1-8; https://doi.org/10.53623/idwm.v2i1.63

343 views
The utilization of less expensive and more effective adsorbents derived from a variety of basic materials has been investigated. The research aimed to investigate the feasibility of employing waste paper as the adsorbent to remove the cresol red (CR) dye from wastewater through adsorption mechanism. Langmuir, Jovanovic, and Freundlich model were observed for isotherms models, while pseudo-first-order and pseudo-second-order were examined for kinetic models. The results indicated that increasing the adsorbent dose and contact time gave no significant effect to adsorption capacity while adsorption capacity increased with the increasing of pH until it reached a maximum at pH 8, and raising the starting dye concentration leads in a significant increase in adsorption capacity (16.7 mg/g). When the experimental adsorption isotherms and kinetic were fitted using the Freundlich models and pseudo-second-order model, it was discovered that those models were more accurately represented by the data, as indicated by a high correlation coefficient (R2) of 0.974 and 0.963. Full text