6533b839fe1ef96bd12a65ae
RESEARCH PRODUCT
Composting of bio-waste, aerobic and anaerobic sludges – Effect of feedstock on the process and quality of compost
Kari HänninenMarina Himanensubject
Environmental EngineeringNitrogenBioengineeringengineering.materialModels BiologicalLepidium sativumBacteria Anaerobicta219Computer SimulationOrganic matterWaste Management and DisposalNitrogen cycleta218Soil Microbiologychemistry.chemical_classificationSewageRenewable Energy Sustainability and the EnvironmentCompostGeneral MedicineMineralization (soil science)Pulp and paper industryRefuse DisposalWastewaterchemistryAgronomyengineeringPhytotoxicityNitrificationAerobiedescription
In-vessel composting of three stocks with originally different degree of organic matter degradation was conducted for: (1) kitchen source-separated bio-waste (BW), (2) aerobic (AS) as well as (3) anaerobic sludges (AnS) from municipal wastewater treatment plant. Composting experiment lasted over a year. The highest activity of the process was in the BW compost. It was implied by the highest temperature, CO(2) release, ammonification and nitrification, intensive accumulation and removal of low-weight carboxylic acids (water- and NaOH-extractable). Between the sludges higher mineralization and CO2 release was in AnS, while ammonification and nitrification were higher in AS compost; no significant difference between sludge composts was noticed for dynamics of pH, conductivity, concentrations of LWCA, and some nutrient compounds and heavy metals. Nitrogen content of the final compost increased in BW, but decreased in AS and AnS. Phytotoxicity of Lepidium sativum was eliminated faster in sludge composts compared to BW compost.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-02-01 | Bioresource Technology |