Addition of seaweed and bentonite accelerates the two-stage composting of green waste

Zhang, Lu; Sun, Xiangyang

doi:10.1016/j.biortech.2017.06.099

Cited by 55 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, with the progress of composting and the decomposition of toxic substances, the GI of each treatment increased rapidly and remained stable at the end of composting. Similar phenomena were found by ( Zhang and Sun, 2017 ; Zhen et al., 2018 ), who reported that the GI remained at a low level at the beginning of composting and then gradually increased with the rise of temperature and decomposition of toxic substances until the end of composting. In addition, it is reported that the decrease of NH 4 + in composting would bring about the increase of GI ( Meng et al., 2018b ), so the volatilization of NH 3 would promote increase of GI.…”

Section: Resultssupporting

confidence: 87%

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Meng

Zhang

et al. 2020

Heliyon

View full text Add to dashboard Cite

The present study included lab-scale sewage sludge (SS) composting amended by molasses and spent mushroom substrate (SMS) in 5 L composting reactor system. The influence of molasses and SMS amendment on nitrogen loss and humification of SS composting was evaluated. The results showed that SMS amendment, especially combination with molasses raised composting temperature, increased CO 2 volatilization, promoted organic matter degradation, improve germination index and humification process. The addition of SMS and molasses contain carbohydrates used as carbon source and energy substance by microorganisms could increase microbial activity and ammonia assimilation. In the SMS + molasses treatments, NH 3 volatilization was reduced by 33.1%–37.3% and N 2 O volatilization was only 17.8%–25.4% of that in the control treatment, furthermore, the nitrogen loss rate was reduced by 27.2%–32.2%. Consequently, the addition of SMS and molasses improved the compost maturity and reduced nitrogen loss in the SS composting process.

show abstract

Section: Resultssupporting

confidence: 87%

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Meng

Zhang

et al. 2020

Heliyon

View full text Add to dashboard Cite

show abstract

“…Similar phenomenon had been found by Zhang et al 32 , who reported that the nutrients in the bulking agent could promote the metabolism of compost microorganisms and increase their biological activity and biomass. In present study, as readily degradable carbon source glucose and sucrose could be quickly used by microorganisms, so the DHA were stronger than those in other treatments, this results was consistent with previous reports 33,34 .…”

Section: Resultssupporting

confidence: 93%

Improving sewage sludge compost process and quality by carbon sources addition

Meng

Zhang

et al. 2021

Sci Rep

View full text Add to dashboard Cite

In present study, the effects of carbon sources on compost process and quality were evaluated in the lab-scale sewage sludge (SS) composting. The composting experiments were performed for 32 days in 5 L reactors. The results showed that carbon sources could change the nitrogen conversion and improve the compost quality. Especially, the readily degradable carbon source could promote organic matter degradation, improve nitrogen conversion process and accelerate compost maturation. The addition of glucose and sucrose could increase dissolved organic carbon, CO2 emission, dehydrogenase activity, nitrification and germination index during the SS composting. That's because glucose and sucrose could be quickly used by microbes as energy and carbon source substance to increase activity of microbes and ammonia assimilation. What's more, the NH3 emission was reduced by 26.9% and 32.1% in glucose and sucrose treatments, respectively. Therefore, the addition of readily degradable carbon source could reduce NH3 emission and improve compost maturity in the SS composting.

show abstract

“…According to many studies, to ensure compost maturity, stability, and safety, the temperature of the compost pile must be sustained in the range of 50-60 • C for at least three consecutive days, indicating that the thermophilic period was sufficient to kill pathogens in the compost. A germination index (GI) value > 80% [21], a final pH value between 6.5-7.5, EC values lower than 4 mS/cm [22], CEC values > 60 cmol/kg [23], a ratio of E 4 /E 6 (optical densities at 465 nm for humic acid and 665 nm for fulvic acid) of at least 1.7 [24], a ratio of C/N < 20 [25], and a final NH 4 +1 -N/NO 3 -1 -N ratio < 3 [26] indicate the absence of compost phytotoxicity and also indicate compost maturity and stability. From Table 2, all the indexes indicated the final green waste compost in our study was well stabilized and mature.…”

Section: Methodsmentioning

confidence: 99%

Reutilization of Green Waste as Compost for Soil Improvement in the Afforested Land of the Beijing Plain

Tong

Sun

et al. 2018

Sustainability

Self Cite

View full text Add to dashboard Cite

Resource utilization of urban green waste compost for soil improvement in afforested land is an important way of digesting urban green waste. In this study, artificial Sophora japonica Linn. Woodland in the Beijing plain, where the million mu (66,700 ha) afforestation project was carried out, was taken as an experimental area to investigate the influences of urban green waste composting on soil improvement and soil microorganisms. Application amounts of green waste composts for each tree were as follows: CK treatment: no application of fertilizer; T1 treatment: 5 kg/each tree; T2 treatment: 10 kg/each tree; T3 treatment: 15 kg/each tree. Results showed that the application of green waste had a significant effect on soil improvement, such as improving of organic matter, available phosphorus, and available potassium content (p < 0.05). The high-level application amount (T3 treatment) had a greater effect on soil improvement. Compared with the control treatment (CK), soil pH in T3 treatment decreased to 7.28-7.45, Soil organic matter contents reached more than 35 g•kg −1 , and soil total nitrogen, soil available phosphorus, and soil available potassium increased by 25-28%, 200-400%, and 80-177%, respectively. Soil carbon-nitrogen ratio has increasing to 15.61-24.38 in the three treatments, which would not obviously slow down the decomposition of organic matter by microorganisms in the soil. After the application of green waste compost, the soil microbial structure was changed. From the operational taxonomic unit (OTU) level, bacterial abundance increased by 12-13%, but the change in bacterial diversity was not significant. The influences of pH and contents of organic matter content, available phosphorus, and rapidly available potassium on the bacterial community were greater. This study will provide the necessary scientific basis for the application of green waste compost in the improvement of soil on afforested land in the Beijing plain.

show abstract

Addition of seaweed and bentonite accelerates the two-stage composting of green waste

Cited by 55 publications

References 37 publications

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Influence of spent mushroom substrate and molasses amendment on nitrogen loss and humification in sewage sludge composting

Improving sewage sludge compost process and quality by carbon sources addition

Reutilization of Green Waste as Compost for Soil Improvement in the Afforested Land of the Beijing Plain

Contact Info

Product

Resources

About