Sustainable Recycling of Steel Manufacturing Wastewater Treatment Solid Wastes Via In-Process Dynamic Separation

2020 ◽  
Author(s):  
N. Ma
Keyword(s):  
Wastewater Treatment ◽  
Solid Wastes ◽  
Process Dynamic ◽  
Steel Manufacturing

Adding value to aluminosilicate solid wastes to produce adsorbents, catalysts and filtration membranes for water and wastewater treatment

2020 ◽  
Vol 56 (2) ◽  
pp. 1039-1063
Author(s):  
Daniela Gier Della Rocca ◽  
Rosane Marina Peralta ◽  
Rosely Aparecida Peralta ◽  
Enrique Rodríguez-Castellón ◽  
Regina de Fatima Peralta Muniz Moreira
Keyword(s):  
Wastewater Treatment ◽  
Solid Wastes ◽  
Water And Wastewater Treatment ◽  
Filtration Membranes ◽  
Water And Wastewater

scholarly journals A Review on the Effects of Flame Retardant Additives Towards the Environment and Human Health

2021 ◽  
Vol 12 (6) ◽  
pp. 7983-7993
Keyword(s):  
Risk Assessment ◽  
Wastewater Treatment ◽  
Adverse Effects ◽  
Flame Retardant ◽  
Human Body ◽  
Treatment Plant ◽  
Consumer Products ◽  
Solid Wastes ◽  
Waste Streams ◽  
Toxicology Assessment

Flame retardant additives (FRAs) are normally the addition of chemicals that function to prevent or slow the spread of fires. These chemicals are used in consumer products and industries and could retain in the environment even after several decades. The toxicity mechanism and risk assessment methods of FRAs are also discussed in this paper. Papers from Scopus, Elsevier, Environmental health perspectives (EHP), Research gate, Semantic scholar, Hindawi, and Pubmed from 2003 to recent years were reviewed to provide some views on the possible risks of FRAs and their pathways into our environment as well as into human body. While FRAs could enter the environment during the manufacturing process and the usage period, consumer items are treated with FRAs, through waste streams, during illegal open burning of solid wastes, from incineration plants from landfill leachate and wastewater treatment plant (WWTP) sludge. FRAs are hazardous to humans and the environment; therefore, toxicology assessment should also be consistently conducted on the latest FRAs to ensure that they would not have adverse effects on humans and the environment.

scholarly journals Optimized Design of Wastewater Treatment Sludge and Municipal Solid Wastes Co-Composting

2019 ◽  
Vol 12 (3) ◽  
pp. 203
Author(s):  
Saeed Nemati ◽  
Bijan Samali ◽  
Farshad Sanati
Keyword(s):  
Wastewater Treatment ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Solid Wastes ◽  
Optimized Design ◽  
Municipal Solid Wastes ◽  
Sludge Dewatering ◽  
Nitrogen Ratio ◽  
Nutrient Resources

The purpose of this study is nutrient resources recovery by achieving the optimal chemical oxygen demand (COD) and carbon to nitrogen ratio (C/N) in co-composting wastewater treatment plant sludge with Municipal Solid Wastes (MSW). In this effort, the co-composting has been conducted in form of a case study in the southern region of Caspian Sea. In this research, 192 tests were carried out on four series of samples examined in terms of waste to sludge ratio, different aeration period, the percent of porous materials and the moisture content. This study was carried out at a temperature of 65 °C for a 15 day period by application of the in-vessel system and shows that the best ratio for waste to sludge is 2:1, while the 8 hour period is the best aeration period. The porous material which can be added to the composting process is limited to 15% in weight. In other words, any more or less amount of this material will adversely impact the process. Moreover, this research suggests that the sludge dewatering is not required in such processes. In Addition, the efficiency of both COD and C/N reductions equals to about 40%.

scholarly journals Urban solid waste in the production of Lafoensia pacari seedlings

2017 ◽  
Vol 21 (2) ◽  
pp. 83-87 ◽  
Author(s):  
Alan H. M. de Abreu ◽  
◽  
Leticia B. Marzola ◽  
Lucas A. de Melo ◽  
Paulo S. dos S. Leles ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sewage Sludge ◽  
Solid Waste ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Quality Parameters ◽  
High Potential ◽  
Solid Wastes ◽  
Coconut Fiber ◽  
Urban Solid Waste

ABSTRACT This study aimed to verify the potential of urban solid wastes as substrate for production of seedlings of Lafoensia pacari. Five treatments were tested, four with solid wastes and one standard substrate, namely: sewage sludge from Alegria Wastewater Treatment Plant (WTP); sewage sludge from Ilha do Governador WTP; sewage sludge from Sarapuí WTP; domestic garbage compost (Fertlurb); and a commercial substrate made of biostabilized pine bark (standard substrate). The wastes received 20% (in volume) of shredded coconut fiber. At 105 days after sowing, the seedlings were evaluated for different quality parameters. Seedlings produced with Sarapuí WTP sewage sludge showed the best results in all the parameters, followed by seedlings produced with sewage sludge from Alegria and Ilha do Governador WTPs, which did not differ. Seedlings produced with domestic garbage compost showed satisfactory results, higher than the ones observed for seedlings produced with commercial substrate. The urban solid wastes with 20% of coconut fiber showed high potential and can be recommended for the composition of substrate in the production of Lafoensia pacari seedlings.

scholarly journals Çevre Korunmasında Atığın Atıkla Giderilmesi Prensibi / Principle Of Removal With Waste Of Waste In Environmental Protection

2013 ◽  
Vol 1 (4) ◽  
pp. 373
Author(s):  
Utkan Özdemir ◽  
Gonca Al
Keyword(s):  
Wastewater Treatment ◽  
Environmental Protection ◽  
Waste Disposal ◽  
Large Scale ◽  
Industrial Process ◽  
Economic Benefits ◽  
Solid Wastes ◽  
Environmental Benefits ◽  
Banana Peel ◽  
Solid Waste Disposal

Çevresel problemler göz önüne alındığında, katı atıkların bertarafı birçok dünya ülkesinin temel problemlerinden birisidir. Bu doğrultuda farklı kaynaklarda oluşan ve büyük ölçüde çeşitlilik gösteren katı atıkların bir kısmının tekrar kullanımı hedeflenmektedir. Böylece ekonomik fayda sağlanmaya çalışılmaktadır. Katı atıkların yarattığı çevre kirliliğine, su kaynaklarında meydana gelen ekolojik problemlerin de eklenmesi insanlık için daha büyük risklerin habercisidir. Dolayısıyla katı atıkların bertarafında önemli yeri olan tekrar kullanımın, sadece ekonomik faydası değil, atığın atıkla giderim esasına katkısı da tartışılmaya başlanmıştır. Tüketim hızının giderek arttığı dünyada, özellikle tarımsal kökenli atıkların, su arıtımında adsorbent olarak kullanılmasıyla yüksek arıtma verimleri sağlandığı gözlemlenmiştir. Bu durumu takip eden çeşitli araştırmalar, muz kabuğu, ayçiçeği sapı, pirinç kabuğu, portakal kabuğu gibi tarımsal kökenli atıkların yanı sıra kül ve arıtma çamuru gibi atıkların da organik ve inorganik bir takım kirleticilerin su ortamından arıtılmasında önemli rol oynadıklarını göstermiştir. Böylece adsorbent maliyeti nedeniyle çoğu zaman işletmeler tarafından uygun görülmeyen ve pilot ölçekli çalışma olarak kalan adsorpsiyon prosesinin kullanılabilirliğinin arttırılması şansı doğmuştur. Adsorpsiyon proseslerinin yaygınlaştırılması ile atıksu arıtımında elde edilebilecek yüksek verimlerin yanı sıra bu proseslerde adsorbent olarak kullanılan atıkların bertarafı da sağlanmış olacaktır. Aynı zamanda bu durum atıkların başka proseslerde de benzer şekilde değerlendirilmelerinin önünü açmaktadır. Bu çalışmada özellikle endüstriyel bazda kullanımlarında ekonomik ve çevresel faydalar sağlayacak atık kökenli adsorbentlerin türleri ve kapasiteleri karşılaştırmalı olarak değerlendirilmiştir. Principle Of Removal With Waste Of Waste In Environmental Protection Solid wastes disposal is one of the fundamental environmental problems of many world countries. By this way reusing of some parts of solid wastes which composed in different sources and shown large scale variety have been aimed. So these ways have been aimed to provide economic benefits. Ecological problems of water resources have been added to solid wastes impurity and these facts have shown bigger risks for humanity. So reusing which is more important of solid waste disposal makes a contribution to waste removal with waste except economical benefits. Especially researchers have been observed to agricultural adsorbents efficiency on the adsorption of water treatment. Some of different research shown that inorganic wastes like ash and sewage sludge as important as agricultural wastes like banana peel, sunflower stem, rice husk, orange peel on wastewater treatment. In this way adsorption’s availability is getting higher for process. High treatment efficiency on wastewater treatment and waste disposal will actualize by adsorption. And these will be example for the other process. In this study, economical and environmental benefits of waste material adsorbents’ species and capacities were evaluated for especially industrial process.

Waste management in Hong Kong abattoirs

1999 ◽  
Vol 40 (1) ◽  
pp. 379-387 ◽  
Author(s):  
A. Koenig ◽  
W. C. Yiu
Keyword(s):  
Wastewater Treatment ◽  
Hong Kong ◽  
Waste Management ◽  
Management Practices ◽  
Treatment Plant ◽  
Solid Wastes ◽  
Waste Reduction ◽  
Extensive Investigation ◽  
Quantitative Results ◽  
Waste Management Practices

This paper reports the results of an extensive investigation on the waste management in Hong Kong abattoirs with the following objectives: (i) to identify the existing waste management practices in relation to sources and quantity of wastes generated, methods of storage and handling of wastes, any in-house treatment, and final disposal of wastes, (ii) to identify the problems of existing waste management practices, and (iii) to evaluate the future development. To obtain up-to-date data and reliable information, site visits were conducted and the management of the abattoirs were interviewed in detail about the operation and waste management practices. For each abattoir and one associated by-product plant, detailed material balances were established for liquid and solid wastes. Complete quantitative results on waste loads, water consumption and material/waste flows are presented. Operational problems regarding wastewater treatment, as well as waste reduction and potential for reuse or recycle of solid wastes are discussed in the context of Hong Kong. Finally, information on the proposed new slaughterhouse (design capacity 5000 pigs and 400 cattle daily) is provided which will include a novel underground wastewater treatment plant.

scholarly journals Nutrient Resources Recovery by a Creative Co-Composting Method of Municipal Solid Wastes and Wastewater Treatment Plant Sludge

2019 ◽  
Author(s):  
Saeed Nemati ◽  
Bijan Samali ◽  
Farzaneh Tahmoorian ◽  
Nader Mokhtarani ◽  
Farshad Sanati
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Northern Region ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Nitrogen Ratio ◽  
Nutrient Resources

The purpose of this study is nutrient resources recovery by achieving the optimal chemical oxygen demand (COD) and carbon to nitrogen ratio (C/N) in co-composting wastewater treatment plant sludge with Municipal Solid Wastes (MSW). In this effort, the co-composting has been conducted in form of a case study in the northern region of Iran. In this research, 192 tests were carried out on four series of samples examined in terms of waste to sludge ratio, different aeration period, the percent of porous materials and the moisture content. This study was carried out at a temperature of 50 °C for a 15 day period by application of the in-vessel system and shows that the best ratio for waste to sludge is 2:1, while the 8 hour period is the best aeration period. The porous material which can be added to the composting process is limited to 15% in weight. In other words, any more or less amount of this material will adversely impact the process. Moreover, this research suggests that the sludge dewatering is not required in such processes. In Addition, the efficiency of both COD and C/N reductions equals to about 40%.

Sign in / Sign up

Export Citation Format

Share Document