Organic Waste Destruction by Indirect Electrooxidation

The destruction of toxic organic wastewaters from munitions demilitarization and complex industrial chemicals clearly becomes an overwhelming problem if left to conventional treatment processes. Two options, incineration and supercritical water oxidation (SCWO), exist for the complete destruction of toxic organic wastewaters. Incinerator, on the one hand, has associated problems such as very high cost and public resentment; SCWO, on the other hand, has proven to be a very promising method for the treatment of various types of wastewaters with its extremely efficient organic waste destruction of 99.99% with none of the emissions associated with incineration. In this review, the concepts of SCWO, the results of and present perspectives on its applications, as well as the industrial status of SCWO are critically examined and discussed.

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High Efficiency of Food Waste Fermentation and Biohydrogen Production in Experimental-industrial Anaerobic Batch Reactor

The Open Agriculture Journal ◽

10.2174/1874331502014010174 ◽

2020 ◽

Vol 14 (1) ◽

pp. 174-186

Author(s):

Vira Hovorukha ◽

Oleksandr Tashyrev ◽

Olesia Havryliuk ◽

Larysa Iastremska

Keyword(s):

Industrial Application ◽

Organic Waste ◽

High Efficiency ◽

Batch Reactor ◽

Scale Up ◽

Green Energy ◽

Toxic Waste ◽

Biohydrogen Production ◽

Hydrogen Yield ◽

Waste Destruction

Background: Multicomponent organic waste is a significant environment hazard. Natural mechanisms can no longer ensure the processing of increasing volumes of such waste. The accumulation of multicomponent organic waste to environment pollution with toxic gases and leachate. Therefore, there is an urgent need to develop cost-effective technologies for the rapid treatment of huge volumes of toxic waste. Moreover, multicomponent organic waste can be used as the substrate for the production of green energy - biohydrogen. Objective: To scale up the technology of biohydrogen production from multicomponent organic waste in experimental-industrial anaerobic batch reactor and to establish fermentation parameters of its operation. Methods: An experimental-industrial anaerobic batch reactor was designed and the method of thermodynamic prognosis was applied to determine the most effective microbial pathway for hydrogen synthesis. The efficiency of the fermentation was evaluated by the pH and redox potential (Eh, mV) of culture medium, the concentration and volume of synthesized gas. Results: The experimental-industrial anaerobic batch reactor with a volume of 240 L was successfully applied to scale up the process of obtaining hydrogen via fermentation of organics. The duration of the technological cycle (T) was 1.5-4 days. The coefficient of waste destruction (Kd) that is the ratio between the initial and final weight of waste was high and ranged from 86 to 140. Hydrogen yield was 45-90 L/kg of dry weight of waste. The maximum concentration of hydrogen (H2max) was 50-58%. Conclusion: The developed approach and scaling of the biotechnology is promising for industrial application for effective hydrogen production via dark fermentation of multicomponent organic waste. Its industrial application might help to solve the problem of toxic multicomponent organic waste destruction and simultaneously to produce green energy H2.

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Electrochemical cell current requirements for toxic organic waste destruction in Ce(IV)-mediated electrochemical oxidation process

Korean Journal of Chemical Engineering ◽

10.1007/s11814-007-0037-3 ◽

2007 ◽

Vol 24 (5) ◽

pp. 749-756 ◽

Cited By ~ 23

Author(s):

Vasily V. Kokovkin ◽

Sang Joon Chung ◽

Subramanian Balaji ◽

Manickam Matheswaran ◽

Il-Shik Moon

Keyword(s):

Electrochemical Oxidation ◽

Organic Waste ◽

Oxidation Process ◽

Electrochemical Cell ◽

Mediated Electrochemical Oxidation ◽

Cell Current ◽

Waste Destruction

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Predicting Organic Waste Performance in Soil Treatment from X-Ray Fluorescence Analysis

International Conference on Advances in Science, Engineering, Technology and Natural Resources (ICASETNR-16) Nov. 24-25, 2016 Parys (South Africa) ◽

10.15242/iae.iae1116475 ◽

2016 ◽

Keyword(s):

Organic Waste ◽

Fluorescence Analysis ◽

Soil Treatment ◽

X Ray

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The Non-Market Benefits of Expanding Organic Waste-to-Energy Facilities: A Choice Experiment Study

Journal of Environmental Policy and Administration ◽

10.15301/jepa.2016.24.4.103 ◽

2016 ◽

Vol 24 (4) ◽

pp. 103 ◽

Cited By ~ 2

Author(s):

Hyo-Jin Kim ◽

Seul-Ye Lim ◽

Seung-Hoon Yoo

Keyword(s):

Choice Experiment ◽

Organic Waste ◽

Waste To Energy ◽

Experiment Study ◽

Market Benefits

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Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae.

Brazilian Journal of Biology ◽

10.1590/1519-6984.224708 ◽

2020 ◽

Author(s):

Gonzalo Flores-Morales ◽

Mónica Díaz ◽

Patricia Arancibia-Avila ◽

Michelle Muñoz-Carrasco ◽

Pamela Jara-Zapata ◽

...

Keyword(s):

Organic Waste ◽

Low Cost ◽

Organic Liquid ◽

Agricultural Waste ◽

Filamentous Algae ◽

Tertiary Treatment ◽

Nutrient Reduction ◽

Algae Removal ◽

Algae Growth ◽

Waste Effluents

Abstract A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

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