scholarly journals Assessment of the Possibility of Introducing a Recycling System of Organic Wastes on Campus: a Case Study on Hokkaido University

2012 ◽  
Vol 8 (1) ◽  
pp. 45-54 ◽  
Author(s):  
Kenta YAMADA ◽  
Masahiko FUJII ◽  
Hajime ARAKI
Keyword(s):  
Organic Wastes ◽  
Recycling System

scholarly journals Co-Management of Sewage Sludge and Other Organic Wastes: A Scandinavian Case Study

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3411
Author(s):  
Clara Fernando-Foncillas ◽  
Maria M. Estevez ◽  
Hinrich Uellendahl ◽  
Cristiano Varrone
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Resource Recovery ◽  
Organic Wastes ◽  
Industrial Wastes ◽  
Wastewater Management ◽  
Sewage Sludge Management ◽  
The Common ◽  
Green Chemicals

Wastewater and sewage sludge contain organic matter that can be valorized through conversion into energy and/or green chemicals. Moreover, resource recovery from these wastes has become the new focus of wastewater management, to develop more sustainable processes in a circular economy approach. The aim of this review was to analyze current sewage sludge management systems in Scandinavia with respect to resource recovery, in combination with other organic wastes. As anaerobic digestion (AD) was found to be the common sludge treatment approach in Scandinavia, different available organic municipal and industrial wastes were identified and compared, to evaluate the potential for expanding the resource recovery by anaerobic co-digestion. Additionally, a full-scale case study of co-digestion, as strategy for optimization of the anaerobic digestion treatment, was presented for each country, together with advanced biorefinery approaches to wastewater treatment and resource recovery.

scholarly journals Enhancement of a Spent Irrigation Water Recycling Process: A Case Study in a Food Business

2021 ◽  
Vol 11 (21) ◽  
pp. 10355
Author(s):  
Guillermo Garcia-Garcia ◽  
Sandeep Jagtap
Keyword(s):  
Irrigation Water ◽  
Membrane Filtration ◽  
Careful Analysis ◽  
Suspended Solid ◽  
Solid Particles ◽  
Water Recycling ◽  
Recycling Process ◽  
Recycling System ◽  
Sprouted Seeds

Food operations use vast amounts of water. To reduce utility costs as well as concerns regarding water depletion in ecosystems, food businesses usually try to reuse their water. However, this often needs a recycling process to ensure the water is of good quality and safe to reuse in a food environment. This paper presents a case study of a grower of beansprouts and other varieties of sprouted seeds that uses six million litres of water weekly. Approximately 60% of their spent irrigation water is recycled using both 50 µm and 20 µm drum filtration. In addition, chlorine dioxide is used as part of the recycling process as a disinfectant. Our analysis demonstrated that the size of suspended solid particles in over 90% of the cumulative sample tested was smaller than the current 20 µm filter in place, highlighting that the existing system was ineffective. We, then, explored options to enhance the water recycling system of the company. After careful analysis, it was proposed to install a membrane-filtration system with ultraviolet technology to increase the finest level of filtration from the existing 20 µm to 0.45 µm absolute and sterilize any remaining bacteria. This not only improved water quality, but also allowed for the removal of chemicals from the recycling system, delivering both financial and technical improvements.

scholarly journals An economic case for regulating against the use of non-deposit carrying glass containers of beverage in South Africa

1998 ◽  
Vol 1 (3) ◽  
pp. 422-445
Author(s):  
S. Hosking
Keyword(s):  
South Africa ◽  
Glass Waste ◽  
Recycling System ◽  
System A ◽  
Glass Containers ◽  
Private Cost ◽  
Port Elizabeth ◽  
Glass Packaging

As a result of minimal private cost many people dispose of non-deposit bearing glass containers in ways which cause glass pollution: hazardous broken bottles and litter. This pollution imposes costs on users of the affected environment and on municipalities, which have most of the responsibility to clean up, although in South Africa the two main glass packaging producers also play a role by operating a recycling system. A case study was carried out in the Port Elizabeth area in which exploration is made of the glass that does not get recycled and an intuitive analysis is made of the costs of different options for managing recyclable glass waste. It is concluded that the case deserves further investigation for introducing legislation in South Africa making bottle deposits mandatory.

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