Iron And Carbon-iron-rich Carrier For Acrylic Fiber Wastewater Enhancement Of Biological Treatment

Acrylic production process will generate a lot of organic waste, is a biodegradable toxicindustrial waste. The complexity of the water quality and poor biodegradability, and theexistence of microbial inhibition factors. Acrylic wastewater discharge standards has been amajor problem in the field of water treatment.This paper attached to Jilin Qifeng Wastewater Treatment Plant, Consider the processoperating costs and effluent is difficult to discharge, The standard treatment for wastewater,Proposed iron-carbon micro-electrolysis technology, Containing polyurethane carrier andSBBR biochemical process, Also investigated the role of iron and iron-rich carrier inbiochemical processing.Experimental study of the electrolysis of iron and carbon, According to the principle ofelectrolysis，Application of sponge iron and activated carbon as filler，Determine the optimumoperating parameters of the electrolytic iron and carbon through orthogonal experiment,Sponge iron content of90g/L,pH=5,Iron-carbon ratio of1/2,HRT=30min, CODcr removalrate of25%and ammonia can reach18%.When determining the optimum operating parameters of the iron-carbonelectrolysis,Examine the iron-rich carrier and polyurethane carrier for wastewater treatment,By changing the experimental conditions as well as combinations of different techniques foracrylic wastewater treatment, mainly to study the following items:(1)Bipolar electrolytic impact on the subsequent biological treatment, Study the effect ofbipolar electrolysis process, When adding alkalinity, reaction residence time HRT was24h,the temperature is25~30℃, Unipolar reaction CODcr removal rate reached50%, and25%ammonia removal, Bipolar reaction CODcr removal rate of65%, and30%ammonia removal.(2) Research reflow process， After a unipolar electrolytic iron-carbon technology,according to50%of reflux，Effluent COD and ammonia nitrogen removal rate could reach60%and25%，Removal than single-stage reaction process increased by5%，Compared withthe two-stage process, the effect of decreased，From saving aspects of filler，the reflowprocess to achieve the removal and the process is simple，Adding a certain amount of spongeiron, the effluent ammonia has increased by2%to3%. (3) Effect of iron-rich carrier in biochemical processing， Study on the biochemicaleffects of sponge iron，Comparative effects of sponge iron，In the case of the same water，Different effects of different carriers，Study the average removal efficiency，After addingsponge ammonia removal to increase about16%，CODcr removal rate to increase by2%，After adding the sodium bicarbonate，Increase in ammonia removal efficiency increased from23.67%to66.43%，When HRT=24h, pH=7，The removal stable of CODcr andAmmonia,Under different flow conditions, After the electrolysis of iron and carbon, ammonia removalby a14.46%to38.13%.(4) Denitrification studies of iron ions in the reaction, Examine the role of differentvalence states of iron ions in biochemical reactions, Which dosing sponge removal of CODcris better, Removal rate of67%, Removal of ammonia nitrogen was significantly better thanthe other reactor, Removal rate of14.46%, Sponge iron removal is a positive, After addingphosphorus source CODcr removal from50%to66%, Ammonia removal rate can reach28.8%, When the pH is7, CODcr removal rate of66%, When the pH is8, ammonia removalefficiency is31.40%.