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- Chunmei Guo, Yi Chen, +5 authors Zhongzhi Zhang
- Bioresource technology
- 2014

This paper investigated the enhancement of the COD reduction of an oilfield wastewater treatment process by installing air-lift tubes and adding an activated carbon bioreactor (ACB) to form a combined hydrolysis acidification and bio-contact oxidation system with air-lift tubes (HA/air-lift BCO) and an ACB. Three heat-resistant bacterial strains were… (More)

- Weizhang Zhong, Zhongzhi Zhang, Yijing Luo, Wei Qiao, Meng Xiao, Min Zhang
- Bioresource technology
- 2012

A batch anaerobic test was conducted to evaluate the effects of adding high carbon content of corn straw to the digestion of Taihu blue algae to attain an optimal C/N ratio for higher methane yield. The addition of corn straw in algae at a C/N ratio of 20/1 increased methane yield by 61.69% at 325 mL g(-1)VS(-1) (compared with 201 mL g(-1) VS(-1) of algae… (More)

- Wei Qiao, Chong Peng, Wei Wang, ZhongZhi Zhang
- Bioresource technology
- 2011

The supernatant of hydrothermally treated sludge was treated by an upflow anaerobic sludge blanket (UASB) reactor for a 550-days running test. The hydrothermal parameter was 170°C for 60 min. An mesophilic 8.6L UASB reactor was seeded with floc sludge. The final organic loading rate (OLR) could reach 18 kg COD/m(3)d. At the initial stage running for 189… (More)

- Mang Lu, Zhongzhi Zhang, Shanshan Sun, Qinfang Wang, Weizhang Zhong
- Chemosphere
- 2009

A study was performed to determine the potential of two-liquid-phase (TLP) bioslurry reactors using silicon oil as solvent for degradation of residual contaminants in petroleum-contaminated soil. The residues were characterized by gas chromatography-mass spectrometry and electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry.… (More)

- Zhongzhi Zhang, Bin Wu, Francesc Comellas
- Discrete Applied Mathematics
- 2014

In this paper we find an exact analytical expression for the number of spanning trees in Apollonian networks. This parameter can be related to significant topological and dynamic properties of the networks, including perco-lation, epidemic spreading, synchronization, and random walks. As Apol-lonian networks constitute an interesting family of maximal… (More)

- Zhongzhi Zhang, Yi Qi, Shuigeng Zhou, Wenlei Xie, Jihong Guan
- Physical review. E, Statistical, nonlinear, and…
- 2009

The explicit determinations of the mean first-passage time (MFPT) for trapping problem are limited to some simple structure, e.g., regular lattices and regular geometrical fractals, and determining MFPT for random walks on other media, especially complex real networks, is a theoretical challenge. In this paper, we investigate a simple random walk on the the… (More)

The Barabási-Albert (BA) model is extended to include the concept of local world and the microscopic event of adding edges. With probability p, we add a new node with m edges which preferentially link to the nodes presented in the network; with probability 1 − p, we add m edges among the present nodes. A node is preferentially selected by its degree to add… (More)

- Weizhang Zhong, Zhongzhi Zhang, Yijing Luo, Shanshan Sun, Wei Qiao, Meng Xiao
- Bioresource technology
- 2011

A biological pretreatment with new complex microbial agents was used to pretreat corn straw at ambient temperature (about 20°C) to improve its biodegradability and anaerobic biogas production. A complex microbial agent dose of 0.01% (w/w) and pretreatment time of 15 days were appropriate for biological pretreatment. These treatment conditions resulted in… (More)

- Zhongzhi Zhang, Lichao Chen, Shuigeng Zhou, Lujun Fang, Jihong Guan, Tao Zou
- Physical review. E, Statistical, nonlinear, and…
- 2008

With the help of recursion relations derived from the self-similar structure, we obtain the solution of average path length, d[over ]_(t) , for Apollonian networks. In contrast to the well-known numerical result d[over ]_{t} proportional, variant(ln N_(t));(3/4) [J. S. Andrade, Jr., Phys. Rev. Lett. 94, 018702 (2005)], our rigorous solution shows that the… (More)

We propose a simple algorithm which produces a new category of networks, high dimensional random Apollonian networks, with small-world and scale-free characteristics. We derive analytical expressions for their degree distributions and clustering coefficients which are determined by the dimension of the network. The values obtained for these parameters are… (More)