Related Experiment Video
Updated: Jul 5, 2026
09:27
Immobilization of Multi-biocatalysts in Alginate Beads for Cofactor Regeneration and Improved Reusability
Published on: April 22, 2016
[Adaptive optimized technologies for ecological sanitation and their complex ecological benefits]
Chuan-Bin Zhou1, Ru-Song Wang, Wen-Rui Yang
1State Key Laboratory of Urban and Region Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zhouchuanbin@gmail.com
Summary
Optimized ecological sanitation (ecosan) technologies offer significant environmental and economic benefits for central and west China. These systems reduce pollution and costs while increasing resource recovery, though management and public acceptance require attention.
Area of Science:
- Environmental Science
- Urban Planning
- Sustainable Technology
Background:
- Cities in central and west China face unique ecological challenges.
- Existing sanitation systems often lack efficiency and sustainability.
- Ecological sanitation (ecosan) offers potential solutions for resource recovery and pollution reduction.
Purpose of the Study:
- To integrate and optimize ecological sanitation (ecosan) technologies for cities in central and west China.
- To assess the environmental, economic, and social impacts of different ecosan approaches.
- To evaluate the potential for resource recovery and cost reduction through improved sanitation.
Main Methods:
- Integration of various adaptable ecosan technologies.
- Establishment of five adaptive optimized ecosan systems.
- Assessment of environmental effects, resource recycling, economic benefits, management, and public acceptance.
- Evaluation of complex eco-benefits and greenhouse gas emission reductions.
Main Results:
- Decentralized ecosan technologies conserve water, recycle nutrients, and save costs but face management and acceptance challenges.
- Centralized ecosan technologies excel in management and public acceptance but incur high costs and have low recycling potential.
- Optimized ecosan systems can reduce greenhouse gas emissions by 70% and water pollution (BOD5) by 30%.
- Recycled nutrients (N, P, K) can increase 15-fold, supplying 3% of domestic energy, 10% of water, and 15% of food demand.
- Total costs can be reduced by 56% when resource-recycling benefits are considered.
Conclusions:
- Optimized ecosan technologies present a viable strategy for sustainable urban development in central and west China.
- Balancing decentralized and centralized approaches is key to maximizing benefits and mitigating drawbacks.
- Significant environmental improvements and resource recovery are achievable through integrated ecosan systems.
Related Concept Videos
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:30Biological Treatment of Effluent and Waste Water
Biological wastewater treatment relies on the metabolic activity of microorganisms to remove pollutants from sewage. In modern treatment systems, this process is organized into sequential stages that progressively reduce solid material, dissolved organic matter, and microbial contamination. Each stage plays a distinct role in improving water quality and preparing the effluent for safe discharge or reuse.Primary and Secondary TreatmentPrimary treatment is a physical process that removes large...
01:30Environmental Applications of Microorganisms
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
00:46Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
01:29Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
01:28Microbial Bioremediation of Pesticides
Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...