Research on the efficiency of integrated oil separator-biological filter unit to treat restaurant wastewater

doi:10.19965/j.cnki.iwt.2020-1187

Industrial Water Treatment ›› 2021, Vol. 41 ›› Issue (7): 134-139. doi: 10.19965/j.cnki.iwt.2020-1187

• Research and Experiment • Previous Articles Next Articles

Research on the efficiency of integrated oil separator-biological filter unit to treat restaurant wastewater

Ye Yao¹(),Guohe Wang²,Chenyi Wang^2,*(),Xiao Tian²,Fangcong Lin²,Cong Lin²

1. China BlueChemical Ltd., Dongfang 572600, China
2. School of Biology and Environment, Zhejiang Wanli University, Ningbo 315100, China

Received:2021-05-10 Online:2021-07-20 Published:2021-07-26
Contact: Chenyi Wang E-mail:yaoye@cnooc.com.cn;wcyxz@163.com

一体式隔油-生物滤池装置处理餐饮废水的效能研究

姚烨¹(),王国贺²,王趁义^2,*(),田啸²,林方聪²,林丛²

1. 海洋石油富岛有限公司, 海南东方 572600
2. 浙江万里学院生物与环境学院, 浙江宁波 315100

通讯作者: 王趁义 E-mail:yaoye@cnooc.com.cn;wcyxz@163.com
作者简介:姚烨(1965-), 高级工程师。E-mail: yaoye@cnooc.com.cn
基金资助:
浙江省公益技术研究计划项目(LGF21E080014);宁波市高新区重大科技专项(2020D类);宁波市高新区重大科技专项(20201CX050018);浙江省“生物工程”一流学科(A类)自设和开放课题(ZS2021007);浙江省“生物工程”一流学科(A类)自设和开放课题(KF2021004);浙江省有机废弃物转化及过程强化技术重点实验室项目(2020E10018);浙江省大学生创新创业训练(S202010876076);浙江省大学生创新创业训练(S202010876043);暨新苗人才计划项目(2020R419005);暨新苗人才计划项目(2020R419013);宁波市“环境科学与工程”一流学科经费

Abstract

Abstract:

Based on the oil separation tank and biological contact oxidation process, an integrated oil separator-bio-filter device was designed to treat restaurant wastewater. The results showed that with the decrease of HRT, the effect of the device on the removal of grease was less, and the effect on COD and SS was greater. Under the condition of the DO in the O zone 3-4 mg/L, the water temperature 20-28℃ and the best HRT 8 hours, the removal rates of grease, COD and SS in the restaurant wastewater reached 98.14%, 91.57% and 93.71%, respectively, and the effluent was better than the control project limit of "Sewage Discharged into Urban Sewer Water Quality Standard", which is the management discharge standard. In addition, the contribution rate of the coarse filter chamber to the removal of grease in the device accounted for 55.55% of the total removal rate of grease in the entire system, and the contribution rate of COD removal in zone A accounted for 62.02% of the total removal rate of COD in the entire system. The removal contribution rate accounted for 50.81% of the total SS removal rate in the entire system. The filler sludge production rate in this device was 0.028 g/g, which was lower than the sludge production rate coefficient of the traditional process, and the sludge reduction effect was obvious. The device also has the function of nitrogen and phosphorus removal. Under the best conditions, its average removal rate of NH₃-N, TN and TP was 80.03%, 67.22% and 60.87%, respectively.

Key words: restaurant wastewater, integrated oil separation-biological filter device, filler sludge yield

摘要：

以隔油池为基础，融入生物接触氧化工艺，设计了一体式隔油-生物滤池装置，用于处理餐饮废水。结果表明，当O区DO为3~4 mg/L，水温为20~28℃，最佳HRT为8 h，此时餐饮废水中的油脂、COD和SS去除率分别达到98.14%、91.57%和93.71%，出水优于《污水排入城镇下水道水质标准》控制项目限值B级即纳管排放标准。除此以外，装置中粗滤室对油脂的去除贡献率占整个系统中油脂总去除率的55.55%，A区对COD的去除贡献率占整个系统中COD总去除率的62.02%，对SS的去除贡献率占整个系统中SS总去除率的50.81%；该装置内填料单位COD污泥产率(以MLSS计)为0.028 g/g，低于传统工艺的污泥产率系数，污泥减量效果显著；该装置还具有脱氮除磷功能，最佳条件下，其对NH₃-N、TN和TP的平均去除率分别为80.03%、67.22%和60.87%。

关键词: 餐饮废水, 一体式隔油-生物滤池装置, 填料污泥产率

CLC Number:

X703

Ye Yao,Guohe Wang,Chenyi Wang,Xiao Tian,Fangcong Lin,Cong Lin. Research on the efficiency of integrated oil separator-biological filter unit to treat restaurant wastewater[J]. Industrial Water Treatment, 2021, 41(7): 134-139.

姚烨,王国贺,王趁义,田啸,林方聪,林丛. 一体式隔油-生物滤池装置处理餐饮废水的效能研究[J]. 工业水处理, 2021, 41(7): 134-139.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2020-1187

https://www.iwt.cn/EN/Y2021/V41/I7/134

Figures/Tables 10

Fig.1 Schematic diagram of integrated oil separator biochemical device

Fig.2 Microbial phase on the biofilm of aerobic packing at the end of biofilm formation

Fig.3 The removal effect of the device on grease

Fig.4 The contribution rate of each area of the device to the removal of grease

Fig.5 The removal effect of the device on COD

Fig.6 Contribution rate of COD removal by Zone A and Zone O

Fig.7 Removal effect of SS by the device

Fig.8 The contribution rate of each area of the device to the removal of SS

Table 1 The effect of the device on the denitrification and phosphorus removal of restaurant wastewater

污染物	进水质量浓度/(mg·L^-1)		出水质量浓度/(mg·L^-1)		去除率/%
污染物	范围	平均值	范围	平均值	去除率/%
NH₃-N	12.90~20.01	18.98	2.21~4.98	3.79	80.03
TN	25.96~36.12	29.38	8.52~11.96	9.63	67.22
TP	4.71~7.33	6.62	2.07~3.24	2.59	60.87

Fig.9 The total amount of sludge changes with time

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