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INDONESIA
Waste Technology
Published by Universitas Diponegoro
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Articles 4 Documents
 1 
Search results for , issue "Vol 2, No 1 (2014)" : 4 Documents clear
Fly Ash Slurry Transportation: Indian Scenario Md Aquil Ahmad; Zeeshan Ali; Md Emamul Haque
Waste Technology Vol 2, No 1 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.181 KB) | DOI: 10.14710/2.1.1-7

Abstract

Fly ash produced in pulverized form are menace to transport due to its powder form. Converting it to slurry form as the physical state change makes it technically viable to move from one place to other convenience to transport. In this paper we envisage the contemporary scenario of transportation of flyash including special focus on trouble related to flyash transportation whether to use in backfilling of mines or open area disposal the transport of these fine particle ash is an issue. Further suggestions and improvement for working of fly ash
EFFLUENT TREATMENT OF PHARMACEUTICAL INDUSTRY BY USING SUBSURFACE FLOW WETLAND SYSTEM Mega Anggraeni; Henna Rya Sunoko; Hadiyanto Hadiyanto
Waste Technology Vol 2, No 1 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (366.897 KB) | DOI: 10.14710/2.1.8-12

Abstract

Constructed wetland is one of the alternatives to increase water quality before it flowed into waterways. Sub Surface Flow Wetland System is one type of the constructed wetland for waste water treatment which is using symbiotic relation between water plants and microorganism around rooting system (rhizosphere) in media. Cyperus alternifolius and Canna indica, L. as well as gravel and sand media are plants and medias that can be used in constructed wetland. This research aimed to analyze the effectiveness of plant species between Cyperus alternifolius and Canna indica, L. as well as the effectiveness of gravel and sand media to decrease nitrite, ammoniak, BOD, and COD concentrations. Four reactors SSF-Wetlands with dimension of 120 cm x 30 cm x 50 cm were used in this research. The study was conducted over 12 days following the  acclimatization of plants for 7 days. Data analysis were performed by comparing the degradation coefficient (k) of BOD, COD, nitrite, and ammonia concentrations with retention time of the effluent. The results showed that  the degradation rate for the reactor with with gravel media and Cyperus alternifolius for nitrite variable was 0.60,  ammonia 0.49, BOD 0.45, and COD 0.36. Cyperus alternifolius have a higher effectiveness in reducing the concentration of nitrite, ammonia , BOD and COD than Canna indica , L. Reactors with gravel media have higher effectiveness in reducing BOD , COD , ammonia and nitrite concentration than sand media. Keywords : Canna indica. L. , Cyperus alternifolius, SSF - Wetland, , WWTP effluent of pharmaceutical industry
Phycoremediation of waste water from a plastic manufacturing industry with Chlorella pyrenoidosa H.Chick in laboratory study Kenanga Sari; Tri Retnaningsih Soeprobowati; Riche Hariyati
Waste Technology Vol 2, No 1 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2023.406 KB) | DOI: 10.14710/2.1.13-16

Abstract

Abstrack - The plastic industries has increased by 7-8% per year, it will cause a negative impact for the environment. The wastewater of plastic industrial contain many pollutants such as hazardous substances bensen, formaldehyde and heavy metals (Cd, Cu, Cr and Pb). Heavy metals Cu is the most dangerous heavy metals since Cu can inhibit enzyme systems, remediation are needed to reduce the pollutants in the environment. One effective way is by using Chlorella pyrenoidosa H.Chick as phycoremediation agent. This study aims to assess the percentage of population growth and decline of heavy metals Cu after inoculation with C. pyrenoidosa H.Chick. The method used is to cultivate C. pyrenoidosa H.Chick in plastic wastewater for 8 days and observed a decrease of percentage heavy metal Cu and population growh of C.pyrenoidosa H.Chick. Environmental factors such as temperature, salinity, pH, light intensity is maintained in order to remain stable. The data obtained with T test. After 8 days of the study turned out that C. pyrenoidosa H.Chick able to reduce Cu of 0.435 mg / l to 0.24 mg / l within 8 days and decrease percentage is 44.83%, thus meeting the criteria of the quality standard of waste according to the PP. 82 of 2001 in the amount of 0.2 ppm and safe for environment. Keywords: Chlorella pyrenoidosa, phycoremediation, water, plastic, copper.
Enhanced biogas production from rice straw with various pretreatment : a review Fahriya Puspita Sari; Budiyono Budiyono
Waste Technology Vol 2, No 1 (2014)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (686.424 KB) | DOI: 10.14710/2.1.17-25

Abstract

Rice straw is one of organic material that can be used for sustainable production of bioenergy and biofuels such as biogas (about 50-75% CH4 and 25-50% CO2). Out of all bioconversion technologies for biogas production, anaerobic digestion (AD) is a most cost-effective bioconversion technology that has been implemented worldwide for commercial production of electricity, heat, and compressed natural gas (CNG) from organic materials. However, the utilization of rice straw for biogas production via anaerobic digestion has not been widely adopted because the complicated structure of the plant cell wall makes it resistant to microbial attack. Pretreatment of recalcitrant rice straw is essential to achieve high biogas yield in the AD process. A number of different pretreatment techniques involving using physical pretreatment (hydrothermal and freeze), chemical pretreatment (sodium carbonate – sodium sulfite, hydrogen peroxide, NMMO, alkaline, and dilute acid) and biological pretreatment (fungal pretreatment) also combined pretretment (microwave irradiation and chemical) approaches have been investigated, but there is no report that systematically compares the performance of these pretreatment methods for application on rice straw for biogas production. This paper reviews the methods that have been studied for pretreatment of rice straw for delignification, reducing sugar, and conversion to biogas. It describes the AD process, structural and compositional properties of rice straw, and various pretreatment techniques, including the pretreatment process, parameters, performance, and advantages vs. drawbacks.

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